{
  "tasks": [
    {
      "id": "list-files-by-size",
      "keywords": [
        "list",
        "files",
        "size",
        "largest",
        "biggest",
        "sort"
      ],
      "category": "files",
      "command": "ls -lhS",
      "description": "List files sorted by size (largest first)",
      "examples": [
        {
          "desc": "List all files by size",
          "cmd": "ls -lhS"
        },
        {
          "desc": "List only files (no directories)",
          "cmd": "ls -lhS | grep -v '^d'"
        },
        {
          "desc": "Show top 10 largest",
          "cmd": "ls -lhS | head -11"
        }
      ],
      "related": [
        "find-large-files",
        "disk-usage"
      ],
      "flags_explained": {
        "-l": "Long format (detailed info)",
        "-h": "Human readable sizes (KB, MB, GB)",
        "-S": "Sort by size (largest first)"
      }
    },
    {
      "id": "find-large-files",
      "keywords": [
        "find",
        "large",
        "big",
        "files",
        "disk",
        "space",
        "100mb",
        "size"
      ],
      "category": "files",
      "command": "find . -type f -size +100M -exec ls -lh {} \\;",
      "description": "Find files larger than 100MB",
      "examples": [
        {
          "desc": "Find files larger than 100MB",
          "cmd": "find . -type f -size +100M -exec ls -lh {} \\;"
        },
        {
          "desc": "Find files larger than 1GB",
          "cmd": "find . -type f -size +1G -exec ls -lh {} \\;"
        },
        {
          "desc": "Find and sort by size",
          "cmd": "find . -type f -size +100M -exec ls -lh {} \\; | sort -k5 -hr"
        }
      ],
      "related": [
        "list-files-by-size",
        "disk-usage"
      ],
      "flags_explained": {
        "-type f": "Only files (not directories)",
        "-size +100M": "Size greater than 100 megabytes",
        "-exec": "Execute command on each found file"
      }
    },
    {
      "id": "search-in-files",
      "keywords": [
        "search",
        "grep",
        "find",
        "text",
        "pattern",
        "recursive",
        "content"
      ],
      "category": "text",
      "command": "grep -r \"pattern\" .",
      "description": "Search for text pattern in files recursively",
      "examples": [
        {
          "desc": "Search recursively in current directory",
          "cmd": "grep -r \"error\" ."
        },
        {
          "desc": "Case-insensitive search",
          "cmd": "grep -ri \"error\" ."
        },
        {
          "desc": "Show line numbers",
          "cmd": "grep -rn \"error\" ."
        },
        {
          "desc": "Search only specific file types",
          "cmd": "grep -r --include=\"*.log\" \"error\" ."
        }
      ],
      "related": [
        "find-and-replace",
        "count-occurrences"
      ],
      "flags_explained": {
        "-r": "Recursive search in subdirectories",
        "-i": "Case-insensitive matching",
        "-n": "Show line numbers"
      }
    },
    {
      "id": "find-and-replace",
      "keywords": [
        "replace",
        "sed",
        "find",
        "change",
        "substitute",
        "text"
      ],
      "category": "text",
      "command": "sed -i 's/old/new/g' file.txt",
      "description": "Find and replace text in files",
      "examples": [
        {
          "desc": "Replace in single file",
          "cmd": "sed -i 's/old/new/g' file.txt"
        },
        {
          "desc": "Replace in all files recursively",
          "cmd": "find . -type f -exec sed -i 's/old/new/g' {} +"
        },
        {
          "desc": "Replace with backup",
          "cmd": "sed -i.bak 's/old/new/g' file.txt"
        }
      ],
      "related": [
        "search-in-files"
      ],
      "flags_explained": {
        "-i": "Edit files in-place",
        "s/old/new/g": "Substitute old with new globally",
        ".bak": "Create backup with .bak extension"
      }
    },
    {
      "id": "compress-folder",
      "keywords": [
        "compress",
        "archive",
        "tar",
        "gzip",
        "zip",
        "backup",
        "folder"
      ],
      "category": "files",
      "command": "tar -czf archive.tar.gz folder/",
      "description": "Compress a folder into tar.gz archive",
      "examples": [
        {
          "desc": "Create compressed archive",
          "cmd": "tar -czf archive.tar.gz folder/"
        },
        {
          "desc": "Extract archive",
          "cmd": "tar -xzf archive.tar.gz"
        },
        {
          "desc": "View archive contents",
          "cmd": "tar -tzf archive.tar.gz"
        }
      ],
      "related": [
        "extract-archive",
        "compress-files"
      ],
      "flags_explained": {
        "-c": "Create archive",
        "-z": "Compress with gzip",
        "-f": "File name follows",
        "-x": "Extract archive",
        "-t": "List contents"
      }
    },
    {
      "id": "disk-usage",
      "keywords": [
        "disk",
        "usage",
        "space",
        "du",
        "size",
        "directory",
        "how much"
      ],
      "category": "files",
      "command": "du -sh */",
      "description": "Show disk usage of directories",
      "examples": [
        {
          "desc": "Show size of each subdirectory",
          "cmd": "du -sh */"
        },
        {
          "desc": "Show top 10 largest directories",
          "cmd": "du -sh */ | sort -hr | head -10"
        },
        {
          "desc": "Total size of current directory",
          "cmd": "du -sh ."
        }
      ],
      "related": [
        "find-large-files",
        "list-files-by-size"
      ],
      "flags_explained": {
        "-s": "Summary only (don't show subdirectories)",
        "-h": "Human readable sizes",
        "*/ ": "All directories in current path"
      }
    },
    {
      "id": "find-files-by-name",
      "keywords": [
        "find",
        "files",
        "name",
        "search",
        "locate",
        "filename"
      ],
      "category": "files",
      "command": "find . -name \"*.txt\"",
      "description": "Find files by name pattern",
      "examples": [
        {
          "desc": "Find all .txt files",
          "cmd": "find . -name \"*.txt\""
        },
        {
          "desc": "Case-insensitive search",
          "cmd": "find . -iname \"*.txt\""
        },
        {
          "desc": "Find files modified today",
          "cmd": "find . -name \"*.txt\" -mtime 0"
        }
      ],
      "related": [
        "search-in-files",
        "find-large-files"
      ],
      "flags_explained": {
        "-name": "Match by exact name pattern",
        "-iname": "Case-insensitive name matching",
        "-mtime": "Modified time in days"
      }
    },
    {
      "id": "monitor-cpu",
      "keywords": [
        "cpu",
        "monitor",
        "top",
        "usage",
        "process",
        "performance",
        "watch"
      ],
      "category": "system",
      "command": "top",
      "description": "Monitor CPU and process usage in real-time",
      "examples": [
        {
          "desc": "Interactive process monitor",
          "cmd": "top"
        },
        {
          "desc": "Monitor and auto-refresh every 2 seconds",
          "cmd": "watch -n 2 'top -b -n 1 | head -20'"
        },
        {
          "desc": "Show CPU usage sorted",
          "cmd": "ps aux --sort=-%cpu | head -10"
        }
      ],
      "related": [
        "monitor-memory",
        "list-processes"
      ],
      "flags_explained": {
        "-b": "Batch mode (non-interactive)",
        "-n": "Number of iterations",
        "--sort": "Sort by specified column"
      }
    },
    {
      "id": "monitor-memory",
      "keywords": [
        "memory",
        "ram",
        "usage",
        "free",
        "available",
        "monitor"
      ],
      "category": "system",
      "command": "free -h",
      "description": "Display memory usage information",
      "examples": [
        {
          "desc": "Show memory in human-readable format",
          "cmd": "free -h"
        },
        {
          "desc": "Monitor memory continuously",
          "cmd": "watch -n 1 free -h"
        },
        {
          "desc": "Show memory in megabytes",
          "cmd": "free -m"
        }
      ],
      "related": [
        "monitor-cpu",
        "disk-usage"
      ],
      "flags_explained": {
        "-h": "Human readable (KB, MB, GB)",
        "-m": "Show in megabytes",
        "-g": "Show in gigabytes"
      }
    },
    {
      "id": "download-file",
      "keywords": [
        "download",
        "wget",
        "curl",
        "file",
        "url",
        "http",
        "get"
      ],
      "category": "network",
      "command": "wget URL",
      "description": "Download file from URL",
      "examples": [
        {
          "desc": "Download file",
          "cmd": "wget https://example.com/file.zip"
        },
        {
          "desc": "Download with custom name",
          "cmd": "wget -O newname.zip https://example.com/file.zip"
        },
        {
          "desc": "Download using curl",
          "cmd": "curl -O https://example.com/file.zip"
        },
        {
          "desc": "Resume interrupted download",
          "cmd": "wget -c https://example.com/file.zip"
        }
      ],
      "related": [
        "check-connectivity",
        "test-url"
      ],
      "flags_explained": {
        "-O": "Save with different name",
        "-c": "Continue/resume download",
        "curl -O": "Download file keeping original name"
      }
    },
    {
      "id": "check-ports",
      "keywords": [
        "port",
        "network",
        "listen",
        "netstat",
        "ss",
        "open",
        "check"
      ],
      "category": "network",
      "command": "ss -tulpn",
      "description": "Check which ports are open and listening",
      "examples": [
        {
          "desc": "Show all listening ports",
          "cmd": "ss -tulpn"
        },
        {
          "desc": "Show only TCP ports",
          "cmd": "ss -tlpn"
        },
        {
          "desc": "Check specific port",
          "cmd": "ss -tulpn | grep :80"
        },
        {
          "desc": "Using netstat (older method)",
          "cmd": "netstat -tulpn"
        }
      ],
      "related": [
        "check-connectivity",
        "firewall-status"
      ],
      "flags_explained": {
        "-t": "TCP ports",
        "-u": "UDP ports",
        "-l": "Listening sockets",
        "-p": "Show process using port",
        "-n": "Numeric addresses (no DNS lookup)"
      }
    },
    {
      "id": "count-lines",
      "keywords": [
        "count",
        "lines",
        "wc",
        "words",
        "characters",
        "file"
      ],
      "category": "text",
      "command": "wc -l file.txt",
      "description": "Count lines, words, or characters in files",
      "examples": [
        {
          "desc": "Count lines in file",
          "cmd": "wc -l file.txt"
        },
        {
          "desc": "Count words",
          "cmd": "wc -w file.txt"
        },
        {
          "desc": "Count all files in directory",
          "cmd": "wc -l *.txt"
        },
        {
          "desc": "Count total lines of code",
          "cmd": "find . -name \"*.py\" -exec wc -l {} + | tail -1"
        }
      ],
      "related": [
        "search-in-files"
      ],
      "flags_explained": {
        "-l": "Count lines",
        "-w": "Count words",
        "-c": "Count bytes"
      }
    },
    {
      "id": "file-permissions",
      "keywords": [
        "permissions",
        "chmod",
        "change",
        "access",
        "rights",
        "owner"
      ],
      "category": "files",
      "command": "chmod 755 file.sh",
      "description": "Change file permissions",
      "examples": [
        {
          "desc": "Make script executable",
          "cmd": "chmod +x script.sh"
        },
        {
          "desc": "Set specific permissions (rwxr-xr-x)",
          "cmd": "chmod 755 file.sh"
        },
        {
          "desc": "Change recursively",
          "cmd": "chmod -R 755 directory/"
        },
        {
          "desc": "View current permissions",
          "cmd": "ls -l file.sh"
        }
      ],
      "related": [
        "change-owner"
      ],
      "flags_explained": {
        "+x": "Add execute permission",
        "755": "rwxr-xr-x (owner: all, group: read+exec, others: read+exec)",
        "-R": "Recursive (apply to all files in directory)"
      }
    },
    {
      "id": "find-duplicates",
      "keywords": [
        "duplicate",
        "files",
        "same",
        "find",
        "fdupes",
        "identical"
      ],
      "category": "files",
      "command": "find . -type f -exec md5sum {} + | sort | uniq -w32 -dD",
      "description": "Find duplicate files by content",
      "examples": [
        {
          "desc": "Find duplicate files using checksums",
          "cmd": "find . -type f -exec md5sum {} + | sort | uniq -w32 -dD"
        },
        {
          "desc": "Find duplicate files by name",
          "cmd": "find . -type f | rev | cut -d/ -f1 | rev | sort | uniq -d"
        },
        {
          "desc": "Using fdupes (if installed)",
          "cmd": "fdupes -r ."
        }
      ],
      "related": [
        "find-files-by-name",
        "disk-usage"
      ],
      "flags_explained": {
        "md5sum": "Calculate file checksum",
        "uniq -d": "Show only duplicate lines",
        "fdupes -r": "Recursive duplicate finder"
      }
    },
    {
      "id": "process-kill",
      "keywords": [
        "kill",
        "process",
        "stop",
        "terminate",
        "pid",
        "pkill"
      ],
      "category": "system",
      "command": "kill PID",
      "description": "Stop/kill a running process",
      "examples": [
        {
          "desc": "Kill process by PID",
          "cmd": "kill 1234"
        },
        {
          "desc": "Force kill process",
          "cmd": "kill -9 1234"
        },
        {
          "desc": "Kill process by name",
          "cmd": "pkill firefox"
        },
        {
          "desc": "Kill all processes matching pattern",
          "cmd": "pkill -f \"python script.py\""
        }
      ],
      "related": [
        "list-processes",
        "monitor-cpu"
      ],
      "flags_explained": {
        "-9": "Force kill (SIGKILL)",
        "pkill": "Kill by process name",
        "-f": "Match full command line"
      }
    },
    {
      "id": "list-processes",
      "keywords": [
        "process",
        "list",
        "ps",
        "running",
        "show",
        "all"
      ],
      "category": "system",
      "command": "ps aux",
      "description": "List all running processes",
      "examples": [
        {
          "desc": "List all processes",
          "cmd": "ps aux"
        },
        {
          "desc": "Find specific process",
          "cmd": "ps aux | grep firefox"
        },
        {
          "desc": "Show process tree",
          "cmd": "ps auxf"
        },
        {
          "desc": "Sort by memory usage",
          "cmd": "ps aux --sort=-%mem | head -10"
        }
      ],
      "related": [
        "monitor-cpu",
        "process-kill"
      ],
      "flags_explained": {
        "a": "Show processes from all users",
        "u": "User-oriented format",
        "x": "Include processes without controlling terminal"
      }
    },
    {
      "id": "create-symlink",
      "keywords": [
        "symlink",
        "link",
        "symbolic",
        "ln",
        "shortcut",
        "alias"
      ],
      "category": "files",
      "command": "ln -s /path/to/file link-name",
      "description": "Create symbolic link to file or directory",
      "examples": [
        {
          "desc": "Create symbolic link",
          "cmd": "ln -s /path/to/original /path/to/link"
        },
        {
          "desc": "Link to current directory",
          "cmd": "ln -s /path/to/file ."
        },
        {
          "desc": "View where link points",
          "cmd": "ls -l link-name"
        }
      ],
      "related": [
        "file-permissions"
      ],
      "flags_explained": {
        "-s": "Create symbolic (soft) link",
        "-f": "Force (overwrite existing link)",
        "readlink": "Show where link points"
      }
    },
    {
      "id": "compare-files",
      "keywords": [
        "compare",
        "diff",
        "difference",
        "files",
        "changes"
      ],
      "category": "text",
      "command": "diff file1.txt file2.txt",
      "description": "Compare two files and show differences",
      "examples": [
        {
          "desc": "Show differences between files",
          "cmd": "diff file1.txt file2.txt"
        },
        {
          "desc": "Side-by-side comparison",
          "cmd": "diff -y file1.txt file2.txt"
        },
        {
          "desc": "Unified diff format (like git)",
          "cmd": "diff -u file1.txt file2.txt"
        },
        {
          "desc": "Compare directories",
          "cmd": "diff -r dir1/ dir2/"
        }
      ],
      "related": [
        "find-duplicates"
      ],
      "flags_explained": {
        "-y": "Side-by-side output",
        "-u": "Unified format (easier to read)",
        "-r": "Recursive (compare directories)"
      }
    },
    {
      "id": "check-connectivity",
      "keywords": [
        "ping",
        "network",
        "connectivity",
        "test",
        "connection",
        "reachable"
      ],
      "category": "network",
      "command": "ping google.com",
      "description": "Test network connectivity to host",
      "examples": [
        {
          "desc": "Ping host continuously",
          "cmd": "ping google.com"
        },
        {
          "desc": "Send only 4 packets",
          "cmd": "ping -c 4 google.com"
        },
        {
          "desc": "Ping specific IP",
          "cmd": "ping 8.8.8.8"
        }
      ],
      "related": [
        "check-ports",
        "download-file"
      ],
      "flags_explained": {
        "-c": "Count (number of packets to send)",
        "-i": "Interval between packets in seconds"
      }
    },
    {
      "id": "watch-command",
      "keywords": [
        "watch",
        "repeat",
        "monitor",
        "refresh",
        "continuously",
        "auto"
      ],
      "category": "system",
      "command": "watch -n 2 command",
      "description": "Execute command repeatedly and display results",
      "examples": [
        {
          "desc": "Watch disk usage every 2 seconds",
          "cmd": "watch -n 2 df -h"
        },
        {
          "desc": "Monitor directory contents",
          "cmd": "watch -n 1 ls -lh"
        },
        {
          "desc": "Highlight changes",
          "cmd": "watch -d -n 1 'ps aux | grep firefox'"
        }
      ],
      "related": [
        "monitor-cpu",
        "monitor-memory"
      ],
      "flags_explained": {
        "-n": "Interval in seconds",
        "-d": "Highlight differences between updates"
      }
    },
    {
      "id": "extract-archive",
      "keywords": [
        "extract",
        "unzip",
        "decompress",
        "tar",
        "archive",
        "unpack"
      ],
      "category": "files",
      "command": "tar -xzf archive.tar.gz",
      "description": "Extract compressed archive files",
      "examples": [
        {
          "desc": "Extract tar.gz archive",
          "cmd": "tar -xzf archive.tar.gz"
        },
        {
          "desc": "Extract to specific directory",
          "cmd": "tar -xzf archive.tar.gz -C /path/to/dir"
        },
        {
          "desc": "Extract .zip file",
          "cmd": "unzip archive.zip"
        },
        {
          "desc": "Extract .tar.bz2 file",
          "cmd": "tar -xjf archive.tar.bz2"
        }
      ],
      "related": [
        "compress-folder"
      ],
      "flags_explained": {
        "-x": "Extract archive",
        "-z": "Decompress gzip",
        "-j": "Decompress bzip2",
        "-C": "Change to directory before extracting"
      }
    },
    {
      "id": "copy-files",
      "keywords": [
        "copy",
        "cp",
        "duplicate",
        "files",
        "clone",
        "backup"
      ],
      "category": "files",
      "command": "cp -r source/ dest/",
      "description": "Copy files and directories",
      "examples": [
        {
          "desc": "Copy a single file",
          "cmd": "cp file.txt backup.txt"
        },
        {
          "desc": "Copy a directory recursively",
          "cmd": "cp -r src/ dest/"
        },
        {
          "desc": "Copy preserving all attributes",
          "cmd": "cp -a src/ dest/"
        },
        {
          "desc": "Copy only when source is newer",
          "cmd": "cp -u file.txt dest/"
        }
      ],
      "related": [
        "move-rename",
        "sync-directories"
      ],
      "flags_explained": {
        "-r": "Recursive (copy directories)",
        "-a": "Archive mode (preserve all attributes)",
        "-u": "Update (copy only when source is newer)",
        "-v": "Verbose (show each file copied)"
      }
    },
    {
      "id": "move-rename",
      "keywords": [
        "move",
        "rename",
        "mv",
        "relocate",
        "files"
      ],
      "category": "files",
      "command": "mv old.txt new.txt",
      "description": "Move or rename files and directories",
      "examples": [
        {
          "desc": "Rename a file",
          "cmd": "mv old.txt new.txt"
        },
        {
          "desc": "Move a file into a directory",
          "cmd": "mv file.txt dir/"
        },
        {
          "desc": "Move multiple files",
          "cmd": "mv *.txt archive/"
        },
        {
          "desc": "Prompt before overwriting",
          "cmd": "mv -i file.txt dest/"
        }
      ],
      "related": [
        "copy-files",
        "delete-files"
      ],
      "flags_explained": {
        "-i": "Interactive (prompt before overwrite)",
        "-n": "No-clobber (never overwrite existing)",
        "-v": "Verbose (show each move)"
      }
    },
    {
      "id": "delete-files",
      "keywords": [
        "delete",
        "remove",
        "rm",
        "erase",
        "files",
        "directory"
      ],
      "category": "files",
      "command": "rm file.txt",
      "description": "Delete files and directories",
      "examples": [
        {
          "desc": "Delete a file",
          "cmd": "rm file.txt"
        },
        {
          "desc": "Delete a directory and its contents",
          "cmd": "rm -r dir/"
        },
        {
          "desc": "Prompt before each deletion",
          "cmd": "rm -i *.txt"
        },
        {
          "desc": "Force delete without prompts",
          "cmd": "rm -rf dir/"
        }
      ],
      "related": [
        "move-rename",
        "find-files-by-name"
      ],
      "flags_explained": {
        "-r": "Recursive (delete directories)",
        "-f": "Force (ignore nonexistent, never prompt)",
        "-i": "Interactive (prompt before each delete)",
        "-v": "Verbose (show each file deleted)"
      }
    },
    {
      "id": "create-directory",
      "keywords": [
        "create",
        "directory",
        "folder",
        "mkdir",
        "make",
        "new"
      ],
      "category": "files",
      "command": "mkdir new-folder",
      "description": "Create new directories",
      "examples": [
        {
          "desc": "Create a directory",
          "cmd": "mkdir project"
        },
        {
          "desc": "Create nested directories",
          "cmd": "mkdir -p a/b/c"
        },
        {
          "desc": "Create multiple directories",
          "cmd": "mkdir src tests docs"
        },
        {
          "desc": "Set permissions on creation",
          "cmd": "mkdir -m 700 private"
        }
      ],
      "related": [
        "copy-files",
        "file-permissions"
      ],
      "flags_explained": {
        "-p": "Create parent directories as needed (no error if existing)",
        "-m": "Set permission mode on the new directory",
        "-v": "Verbose (print each created directory)"
      }
    },
    {
      "id": "change-ownership",
      "keywords": [
        "owner",
        "ownership",
        "chown",
        "group",
        "user",
        "permissions"
      ],
      "category": "files",
      "command": "chown user:group file.txt",
      "description": "Change file owner and group",
      "examples": [
        {
          "desc": "Change owner of a file",
          "cmd": "chown alice file.txt"
        },
        {
          "desc": "Change owner and group",
          "cmd": "chown alice:devs file.txt"
        },
        {
          "desc": "Change recursively",
          "cmd": "chown -R alice:devs project/"
        },
        {
          "desc": "Change group only",
          "cmd": "chown :devs file.txt"
        }
      ],
      "related": [
        "file-permissions"
      ],
      "flags_explained": {
        "-R": "Recursive (apply to all files in directory)",
        "user:group": "Set both owner and group",
        "-v": "Verbose (report changes)"
      }
    },
    {
      "id": "sync-directories",
      "keywords": [
        "sync",
        "rsync",
        "mirror",
        "backup",
        "copy",
        "incremental"
      ],
      "category": "files",
      "command": "rsync -av source/ dest/",
      "description": "Synchronize directories efficiently",
      "examples": [
        {
          "desc": "Sync a directory locally",
          "cmd": "rsync -av src/ dest/"
        },
        {
          "desc": "Sync to a remote host over SSH",
          "cmd": "rsync -av src/ user@host:/path/"
        },
        {
          "desc": "Mirror (delete extras in dest)",
          "cmd": "rsync -av --delete src/ dest/"
        },
        {
          "desc": "Show progress during transfer",
          "cmd": "rsync -av --progress src/ dest/"
        }
      ],
      "related": [
        "copy-files",
        "compress-folder"
      ],
      "flags_explained": {
        "-a": "Archive mode (recursive, preserve attributes)",
        "-v": "Verbose output",
        "--delete": "Delete files in dest not present in source",
        "--progress": "Show transfer progress per file"
      }
    },
    {
      "id": "find-recent-files",
      "keywords": [
        "recent",
        "modified",
        "newest",
        "find",
        "files",
        "today",
        "changed"
      ],
      "category": "files",
      "command": "find . -type f -mtime -1",
      "description": "Find recently modified files",
      "examples": [
        {
          "desc": "Files modified in the last 24 hours",
          "cmd": "find . -type f -mtime -1"
        },
        {
          "desc": "Files modified in the last 7 days",
          "cmd": "find . -type f -mtime -7"
        },
        {
          "desc": "Files modified in the last 30 minutes",
          "cmd": "find . -type f -mmin -30"
        },
        {
          "desc": "List newest files by time",
          "cmd": "ls -lt | head"
        }
      ],
      "related": [
        "find-files-by-name",
        "find-large-files"
      ],
      "flags_explained": {
        "-mtime -1": "Modified less than 1 day ago",
        "-mmin -30": "Modified less than 30 minutes ago",
        "-type f": "Only files (not directories)"
      }
    },
    {
      "id": "find-empty-dirs",
      "keywords": [
        "empty",
        "directories",
        "folders",
        "find",
        "delete",
        "clean"
      ],
      "category": "files",
      "command": "find . -type d -empty",
      "description": "Find and remove empty directories",
      "examples": [
        {
          "desc": "Find empty directories",
          "cmd": "find . -type d -empty"
        },
        {
          "desc": "Find empty files",
          "cmd": "find . -type f -empty"
        },
        {
          "desc": "Delete empty directories",
          "cmd": "find . -type d -empty -delete"
        }
      ],
      "related": [
        "find-files-by-name",
        "delete-files"
      ],
      "flags_explained": {
        "-type d": "Only directories",
        "-empty": "Match empty files/directories",
        "-delete": "Delete matched entries"
      }
    },
    {
      "id": "sort-lines",
      "keywords": [
        "sort",
        "order",
        "arrange",
        "lines",
        "alphabetical",
        "numeric"
      ],
      "category": "text",
      "command": "sort file.txt",
      "description": "Sort lines of text in a file",
      "examples": [
        {
          "desc": "Sort alphabetically",
          "cmd": "sort file.txt"
        },
        {
          "desc": "Sort numerically",
          "cmd": "sort -n numbers.txt"
        },
        {
          "desc": "Sort in reverse order",
          "cmd": "sort -r file.txt"
        },
        {
          "desc": "Sort and remove duplicates",
          "cmd": "sort -u file.txt"
        }
      ],
      "related": [
        "unique-lines",
        "count-lines"
      ],
      "flags_explained": {
        "-n": "Numeric sort (treat values as numbers)",
        "-r": "Reverse the sort order",
        "-u": "Output only unique lines",
        "-k": "Sort by a specific field/column"
      }
    },
    {
      "id": "unique-lines",
      "keywords": [
        "unique",
        "duplicate",
        "uniq",
        "distinct",
        "deduplicate",
        "count"
      ],
      "category": "text",
      "command": "sort file.txt | uniq",
      "description": "Filter or count repeated lines",
      "examples": [
        {
          "desc": "Remove duplicate lines",
          "cmd": "sort file.txt | uniq"
        },
        {
          "desc": "Count occurrences of each line",
          "cmd": "sort file.txt | uniq -c"
        },
        {
          "desc": "Show only duplicated lines",
          "cmd": "sort file.txt | uniq -d"
        },
        {
          "desc": "Show only unique (non-repeated) lines",
          "cmd": "sort file.txt | uniq -u"
        }
      ],
      "related": [
        "sort-lines",
        "word-frequency"
      ],
      "flags_explained": {
        "-c": "Prefix each line with its count",
        "-d": "Only print duplicated lines",
        "-u": "Only print lines that are not repeated"
      }
    },
    {
      "id": "extract-columns",
      "keywords": [
        "columns",
        "fields",
        "awk",
        "extract",
        "print",
        "select"
      ],
      "category": "text",
      "command": "awk '{print $1}' file.txt",
      "description": "Extract columns or fields from text",
      "examples": [
        {
          "desc": "Print the first column",
          "cmd": "awk '{print $1}' file.txt"
        },
        {
          "desc": "Print first and third columns",
          "cmd": "awk '{print $1, $3}' file.txt"
        },
        {
          "desc": "Use a custom delimiter (CSV)",
          "cmd": "awk -F',' '{print $2}' data.csv"
        },
        {
          "desc": "Cut by character delimiter",
          "cmd": "cut -d',' -f1 data.csv"
        }
      ],
      "related": [
        "search-in-files",
        "find-and-replace"
      ],
      "flags_explained": {
        "$1": "Reference to the first field/column",
        "-F','": "Set the input field separator to a comma",
        "print": "Output the selected fields",
        "cut -d -f": "Cut by delimiter and select fields"
      }
    },
    {
      "id": "view-file",
      "keywords": [
        "view",
        "read",
        "display",
        "less",
        "head",
        "tail",
        "page"
      ],
      "category": "text",
      "command": "less file.txt",
      "description": "View file contents with paging",
      "examples": [
        {
          "desc": "Page through a file",
          "cmd": "less file.txt"
        },
        {
          "desc": "Show the first 20 lines",
          "cmd": "head -20 file.txt"
        },
        {
          "desc": "Show the last 20 lines",
          "cmd": "tail -20 file.txt"
        },
        {
          "desc": "Follow a log file live",
          "cmd": "tail -f /var/log/syslog"
        }
      ],
      "related": [
        "count-lines",
        "search-in-files"
      ],
      "flags_explained": {
        "head -N": "Show the first N lines",
        "tail -N": "Show the last N lines",
        "tail -f": "Follow file as it grows (live updates)"
      }
    },
    {
      "id": "json-query",
      "keywords": [
        "json",
        "jq",
        "parse",
        "query",
        "extract",
        "api",
        "data"
      ],
      "category": "text",
      "command": "jq '.key' file.json",
      "description": "Parse and query JSON data",
      "examples": [
        {
          "desc": "Extract a top-level field",
          "cmd": "jq '.name' file.json"
        },
        {
          "desc": "Extract a nested field",
          "cmd": "jq '.user.email' file.json"
        },
        {
          "desc": "List array elements",
          "cmd": "jq '.items[]' file.json"
        },
        {
          "desc": "Pretty-print JSON from an API",
          "cmd": "curl -s URL | jq ."
        }
      ],
      "related": [
        "search-in-files",
        "check-website"
      ],
      "flags_explained": {
        ".key": "Select the value of a field",
        ".[]": "Iterate over array elements",
        "-r": "Raw output (no JSON quotes)",
        ".": "Identity filter (pretty-print whole input)"
      }
    },
    {
      "id": "word-frequency",
      "keywords": [
        "frequency",
        "count",
        "words",
        "occurrences",
        "most",
        "common",
        "histogram"
      ],
      "category": "text",
      "command": "tr ' ' '\\n' < file.txt | sort | uniq -c | sort -nr",
      "description": "Count word or value frequency",
      "examples": [
        {
          "desc": "Most common words in a file",
          "cmd": "tr ' ' '\\n' < file.txt | sort | uniq -c | sort -nr"
        },
        {
          "desc": "Top 10 most frequent lines",
          "cmd": "sort file.txt | uniq -c | sort -nr | head -10"
        },
        {
          "desc": "Count matches of a pattern",
          "cmd": "grep -o 'error' file.log | wc -l"
        }
      ],
      "related": [
        "unique-lines",
        "count-lines"
      ],
      "flags_explained": {
        "tr ' ' '\\n'": "Split words onto separate lines",
        "uniq -c": "Count occurrences of each line",
        "sort -nr": "Sort by count, highest first"
      }
    },
    {
      "id": "dns-lookup",
      "keywords": [
        "dns",
        "dig",
        "nslookup",
        "domain",
        "resolve",
        "lookup",
        "records"
      ],
      "category": "network",
      "command": "dig example.com",
      "description": "Look up DNS records for a domain",
      "examples": [
        {
          "desc": "Look up A records",
          "cmd": "dig example.com"
        },
        {
          "desc": "Short answer only",
          "cmd": "dig +short example.com"
        },
        {
          "desc": "Look up MX (mail) records",
          "cmd": "dig example.com MX"
        },
        {
          "desc": "Reverse DNS lookup",
          "cmd": "dig -x 8.8.8.8"
        }
      ],
      "related": [
        "check-connectivity",
        "check-website"
      ],
      "flags_explained": {
        "+short": "Show only the concise answer",
        "MX": "Query mail-exchange records",
        "-x": "Perform a reverse (PTR) lookup"
      }
    },
    {
      "id": "copy-to-remote",
      "keywords": [
        "scp",
        "copy",
        "remote",
        "transfer",
        "upload",
        "download",
        "ssh"
      ],
      "category": "network",
      "command": "scp file.txt user@host:/path/",
      "description": "Copy files to or from a remote host",
      "examples": [
        {
          "desc": "Upload a file to a server",
          "cmd": "scp file.txt user@host:/path/"
        },
        {
          "desc": "Download a file from a server",
          "cmd": "scp user@host:/path/file.txt ."
        },
        {
          "desc": "Copy a directory recursively",
          "cmd": "scp -r dir/ user@host:/path/"
        },
        {
          "desc": "Use a specific SSH port",
          "cmd": "scp -P 2222 file.txt user@host:/path/"
        }
      ],
      "related": [
        "sync-directories",
        "download-file"
      ],
      "flags_explained": {
        "-r": "Recursive (copy directories)",
        "-P": "Specify the remote SSH port",
        "-C": "Enable compression during transfer"
      }
    },
    {
      "id": "check-website",
      "keywords": [
        "website",
        "http",
        "status",
        "curl",
        "headers",
        "url",
        "test"
      ],
      "category": "network",
      "command": "curl -I https://example.com",
      "description": "Check a website's status and headers",
      "examples": [
        {
          "desc": "Show response headers only",
          "cmd": "curl -I https://example.com"
        },
        {
          "desc": "Show only the HTTP status code",
          "cmd": "curl -o /dev/null -s -w '%{http_code}\\n' https://example.com"
        },
        {
          "desc": "Follow redirects",
          "cmd": "curl -IL https://example.com"
        },
        {
          "desc": "Measure total response time",
          "cmd": "curl -o /dev/null -s -w '%{time_total}\\n' https://example.com"
        }
      ],
      "related": [
        "download-file",
        "check-connectivity"
      ],
      "flags_explained": {
        "-I": "Fetch headers only (HEAD request)",
        "-L": "Follow redirects",
        "-s": "Silent mode (no progress meter)",
        "-w": "Write out custom info (e.g. status code)"
      }
    },
    {
      "id": "public-ip",
      "keywords": [
        "ip",
        "public",
        "address",
        "external",
        "myip",
        "network"
      ],
      "category": "network",
      "command": "curl -s ifconfig.me",
      "description": "Find your public and local IP addresses",
      "examples": [
        {
          "desc": "Show your public IP",
          "cmd": "curl -s ifconfig.me"
        },
        {
          "desc": "Alternative public IP service",
          "cmd": "curl -s https://api.ipify.org"
        },
        {
          "desc": "Show local IP addresses",
          "cmd": "ip addr show"
        },
        {
          "desc": "Show default gateway",
          "cmd": "ip route | grep default"
        }
      ],
      "related": [
        "check-connectivity",
        "check-ports"
      ],
      "flags_explained": {
        "-s": "Silent mode (suppress progress output)",
        "ip addr": "Show network interface addresses",
        "ip route": "Show the routing table"
      }
    },
    {
      "id": "disk-free",
      "keywords": [
        "disk",
        "free",
        "space",
        "df",
        "available",
        "filesystem",
        "mount"
      ],
      "category": "system",
      "command": "df -h",
      "description": "Show available disk space on filesystems",
      "examples": [
        {
          "desc": "Show disk usage human-readable",
          "cmd": "df -h"
        },
        {
          "desc": "Show filesystem types",
          "cmd": "df -hT"
        },
        {
          "desc": "Show usage for current directory",
          "cmd": "df -h ."
        },
        {
          "desc": "Show inode usage",
          "cmd": "df -i"
        }
      ],
      "related": [
        "disk-usage",
        "find-large-files"
      ],
      "flags_explained": {
        "-h": "Human-readable sizes (KB, MB, GB)",
        "-T": "Show the filesystem type",
        "-i": "Show inode information instead of blocks"
      }
    },
    {
      "id": "system-uptime",
      "keywords": [
        "uptime",
        "load",
        "running",
        "system",
        "boot",
        "how long"
      ],
      "category": "system",
      "command": "uptime",
      "description": "Show system uptime and load average",
      "examples": [
        {
          "desc": "Show uptime and load",
          "cmd": "uptime"
        },
        {
          "desc": "Pretty uptime format",
          "cmd": "uptime -p"
        },
        {
          "desc": "Show when the system booted",
          "cmd": "uptime -s"
        },
        {
          "desc": "Show last reboot times",
          "cmd": "last reboot | head"
        }
      ],
      "related": [
        "monitor-cpu",
        "monitor-memory"
      ],
      "flags_explained": {
        "-p": "Pretty format (e.g. 'up 3 hours')",
        "-s": "Show system boot time",
        "load average": "Avg processes waiting over 1/5/15 minutes"
      }
    },
    {
      "id": "service-status",
      "keywords": [
        "service",
        "systemctl",
        "status",
        "start",
        "stop",
        "restart",
        "daemon"
      ],
      "category": "system",
      "command": "systemctl status nginx",
      "description": "Manage and inspect system services",
      "examples": [
        {
          "desc": "Check a service's status",
          "cmd": "systemctl status nginx"
        },
        {
          "desc": "Start a service",
          "cmd": "sudo systemctl start nginx"
        },
        {
          "desc": "Restart a service",
          "cmd": "sudo systemctl restart nginx"
        },
        {
          "desc": "Enable a service at boot",
          "cmd": "sudo systemctl enable nginx"
        }
      ],
      "related": [
        "view-logs",
        "list-processes"
      ],
      "flags_explained": {
        "status": "Show whether a service is running",
        "start/stop": "Start or stop the service now",
        "restart": "Stop then start the service",
        "enable/disable": "Control whether it starts at boot"
      }
    },
    {
      "id": "view-logs",
      "keywords": [
        "logs",
        "journalctl",
        "systemd",
        "errors",
        "syslog",
        "debug"
      ],
      "category": "system",
      "command": "journalctl -xe",
      "description": "View and follow system logs",
      "examples": [
        {
          "desc": "Show recent log entries",
          "cmd": "journalctl -xe"
        },
        {
          "desc": "Follow logs live",
          "cmd": "journalctl -f"
        },
        {
          "desc": "Logs for a specific service",
          "cmd": "journalctl -u nginx"
        },
        {
          "desc": "Logs since boot",
          "cmd": "journalctl -b"
        }
      ],
      "related": [
        "service-status",
        "kernel-messages"
      ],
      "flags_explained": {
        "-f": "Follow (live tail) new log entries",
        "-u": "Filter by systemd unit/service",
        "-b": "Show logs from the current boot",
        "-xe": "Add explanations and jump to the end"
      }
    },
    {
      "id": "find-process-by-port",
      "keywords": [
        "port",
        "process",
        "lsof",
        "which",
        "using",
        "pid",
        "listening"
      ],
      "category": "system",
      "command": "lsof -i :8080",
      "description": "Find which process is using a port",
      "examples": [
        {
          "desc": "Find process on a port",
          "cmd": "lsof -i :8080"
        },
        {
          "desc": "Alternative using ss",
          "cmd": "ss -tulpn | grep :8080"
        },
        {
          "desc": "Find files opened by a process",
          "cmd": "lsof -p 1234"
        },
        {
          "desc": "Kill the process using a port",
          "cmd": "kill $(lsof -t -i :8080)"
        }
      ],
      "related": [
        "check-ports",
        "process-kill"
      ],
      "flags_explained": {
        "-i :PORT": "Show processes using a network port",
        "-p PID": "List files opened by a specific process",
        "-t": "Terse output (PIDs only, for scripting)"
      }
    },
    {
      "id": "schedule-cron",
      "keywords": [
        "cron",
        "crontab",
        "schedule",
        "job",
        "automate",
        "periodic",
        "task"
      ],
      "category": "system",
      "command": "crontab -e",
      "description": "Schedule recurring tasks with cron",
      "examples": [
        {
          "desc": "Edit your crontab",
          "cmd": "crontab -e"
        },
        {
          "desc": "List your scheduled jobs",
          "cmd": "crontab -l"
        },
        {
          "desc": "Run a script every day at 2am",
          "cmd": "0 2 * * * /path/to/script.sh"
        },
        {
          "desc": "Run a one-off task later",
          "cmd": "echo 'task.sh' | at now + 1 hour"
        }
      ],
      "related": [
        "watch-command",
        "service-status"
      ],
      "flags_explained": {
        "-e": "Edit the current user's crontab",
        "-l": "List the current user's cron jobs",
        "* * * * *": "min hour day-of-month month day-of-week",
        "at": "Schedule a single future command"
      }
    },
    {
      "id": "cpu-info",
      "keywords": [
        "cpu",
        "cores",
        "processor",
        "lscpu",
        "hardware",
        "info",
        "architecture"
      ],
      "category": "system",
      "command": "lscpu",
      "description": "Show CPU and hardware information",
      "examples": [
        {
          "desc": "Show CPU architecture details",
          "cmd": "lscpu"
        },
        {
          "desc": "Count the number of cores",
          "cmd": "nproc"
        },
        {
          "desc": "Show memory and CPU summary",
          "cmd": "free -h && lscpu | head"
        },
        {
          "desc": "List block devices",
          "cmd": "lsblk"
        }
      ],
      "related": [
        "monitor-cpu",
        "monitor-memory"
      ],
      "flags_explained": {
        "lscpu": "Display CPU architecture from sysfs",
        "nproc": "Print the number of processing units",
        "lsblk": "List block storage devices"
      }
    },
    {
      "id": "kernel-messages",
      "keywords": [
        "dmesg",
        "kernel",
        "messages",
        "hardware",
        "boot",
        "driver",
        "errors"
      ],
      "category": "system",
      "command": "dmesg",
      "description": "View kernel ring buffer messages",
      "examples": [
        {
          "desc": "Show kernel messages",
          "cmd": "dmesg"
        },
        {
          "desc": "Human-readable timestamps",
          "cmd": "dmesg -T"
        },
        {
          "desc": "Follow new kernel messages",
          "cmd": "dmesg -w"
        },
        {
          "desc": "Filter for USB events",
          "cmd": "dmesg | grep -i usb"
        }
      ],
      "related": [
        "view-logs",
        "service-status"
      ],
      "flags_explained": {
        "-T": "Show human-readable timestamps",
        "-w": "Wait and follow new messages",
        "-l": "Restrict output to given log levels"
      }
    },
    {
      "id": "git-status",
      "keywords": [
        "git",
        "status",
        "changes",
        "staged",
        "modified",
        "version",
        "control"
      ],
      "category": "git",
      "command": "git status",
      "description": "Show the working tree status",
      "examples": [
        {
          "desc": "Show changed and staged files",
          "cmd": "git status"
        },
        {
          "desc": "Short status format",
          "cmd": "git status -s"
        },
        {
          "desc": "Show changes vs last commit",
          "cmd": "git diff"
        },
        {
          "desc": "Show staged changes",
          "cmd": "git diff --staged"
        }
      ],
      "related": [
        "git-log",
        "git-discard"
      ],
      "flags_explained": {
        "-s": "Short, compact status output",
        "git diff": "Show unstaged line-by-line changes",
        "--staged": "Show changes already staged for commit"
      }
    },
    {
      "id": "git-log",
      "keywords": [
        "git",
        "log",
        "history",
        "commits",
        "graph",
        "version",
        "control"
      ],
      "category": "git",
      "command": "git log --oneline",
      "description": "View commit history",
      "examples": [
        {
          "desc": "Compact one-line history",
          "cmd": "git log --oneline"
        },
        {
          "desc": "Show a branch graph",
          "cmd": "git log --oneline --graph --all"
        },
        {
          "desc": "Last 5 commits",
          "cmd": "git log -5"
        },
        {
          "desc": "Commits by an author",
          "cmd": "git log --author='Alice'"
        }
      ],
      "related": [
        "git-status",
        "git-discard"
      ],
      "flags_explained": {
        "--oneline": "One commit per line (short hash + subject)",
        "--graph": "Draw an ASCII commit graph",
        "--all": "Include all branches",
        "--author": "Filter commits by author"
      }
    },
    {
      "id": "git-discard",
      "keywords": [
        "git",
        "discard",
        "undo",
        "revert",
        "reset",
        "restore",
        "changes"
      ],
      "category": "git",
      "command": "git restore file.txt",
      "description": "Undo or discard local changes",
      "examples": [
        {
          "desc": "Discard changes to a file",
          "cmd": "git restore file.txt"
        },
        {
          "desc": "Unstage a file",
          "cmd": "git restore --staged file.txt"
        },
        {
          "desc": "Discard all uncommitted changes",
          "cmd": "git checkout ."
        },
        {
          "desc": "Undo the last commit (keep changes)",
          "cmd": "git reset --soft HEAD~1"
        }
      ],
      "related": [
        "git-status",
        "git-log"
      ],
      "flags_explained": {
        "restore": "Restore a file to its committed state",
        "--staged": "Move a file out of the staging area",
        "reset --soft HEAD~1": "Undo last commit, keep changes staged"
      }
    },
    {
      "id": "current-user",
      "keywords": [
        "user",
        "whoami",
        "id",
        "current",
        "username",
        "groups",
        "uid"
      ],
      "category": "users",
      "command": "whoami",
      "description": "Show information about the current user",
      "examples": [
        {
          "desc": "Print the current username",
          "cmd": "whoami"
        },
        {
          "desc": "Show user and group IDs",
          "cmd": "id"
        },
        {
          "desc": "List groups you belong to",
          "cmd": "groups"
        },
        {
          "desc": "Show your home and shell",
          "cmd": "echo $HOME $SHELL"
        }
      ],
      "related": [
        "who-logged-in",
        "file-permissions"
      ],
      "flags_explained": {
        "whoami": "Print the effective username",
        "id": "Print user and group IDs",
        "groups": "List the groups the user belongs to"
      }
    },
    {
      "id": "who-logged-in",
      "keywords": [
        "who",
        "logged",
        "users",
        "online",
        "sessions",
        "w",
        "login"
      ],
      "category": "users",
      "command": "who",
      "description": "Show who is currently logged in",
      "examples": [
        {
          "desc": "List logged-in users",
          "cmd": "who"
        },
        {
          "desc": "Show users and what they're doing",
          "cmd": "w"
        },
        {
          "desc": "Show recent login history",
          "cmd": "last | head"
        },
        {
          "desc": "Count logged-in users",
          "cmd": "who | wc -l"
        }
      ],
      "related": [
        "current-user",
        "list-processes"
      ],
      "flags_explained": {
        "who": "List currently logged-in users",
        "w": "Show users plus their active processes",
        "last": "Show a history of logins"
      }
    },
    {
      "id": "git-commit",
      "keywords": [
        "commit",
        "save",
        "record",
        "changes",
        "stage"
      ],
      "category": "git",
      "command": "git commit -m \"message\"",
      "description": "Record staged changes to the repository",
      "examples": [
        {
          "desc": "Stage all and commit",
          "cmd": "git commit -am \"message\""
        },
        {
          "desc": "Commit specific files",
          "cmd": "git add file.txt && git commit -m \"msg\""
        },
        {
          "desc": "Amend last commit",
          "cmd": "git commit --amend"
        }
      ],
      "related": [
        "git-status",
        "git-push",
        "git-discard"
      ],
      "flags_explained": {
        "-m": "Commit message inline",
        "-a": "Auto-stage all tracked modified files",
        "--amend": "Replace the previous commit"
      }
    },
    {
      "id": "git-branch",
      "keywords": [
        "branch",
        "branches",
        "list",
        "create",
        "new"
      ],
      "category": "git",
      "command": "git branch",
      "description": "List, create, or delete branches",
      "examples": [
        {
          "desc": "List local branches",
          "cmd": "git branch"
        },
        {
          "desc": "Create a branch",
          "cmd": "git branch feature-x"
        },
        {
          "desc": "Delete a branch",
          "cmd": "git branch -d feature-x"
        }
      ],
      "related": [
        "git-checkout",
        "git-merge"
      ],
      "flags_explained": {
        "-a": "List all branches incl. remote",
        "-d": "Delete a merged branch",
        "-D": "Force-delete a branch"
      }
    },
    {
      "id": "git-checkout",
      "keywords": [
        "checkout",
        "switch",
        "branch",
        "change",
        "move"
      ],
      "category": "git",
      "command": "git switch branch-name",
      "description": "Switch to a different branch (modern: git switch)",
      "examples": [
        {
          "desc": "Switch branch",
          "cmd": "git switch main"
        },
        {
          "desc": "Create and switch",
          "cmd": "git switch -c new-feature"
        },
        {
          "desc": "Legacy syntax",
          "cmd": "git checkout main"
        }
      ],
      "related": [
        "git-branch",
        "git-merge"
      ],
      "flags_explained": {
        "-c": "Create the branch then switch to it",
        "-": "Switch to previous branch (git switch -)"
      }
    },
    {
      "id": "git-merge",
      "keywords": [
        "merge",
        "combine",
        "integrate",
        "join",
        "branch"
      ],
      "category": "git",
      "command": "git merge branch-name",
      "description": "Merge another branch into the current branch",
      "examples": [
        {
          "desc": "Merge a feature branch",
          "cmd": "git merge feature-x"
        },
        {
          "desc": "Merge without fast-forward",
          "cmd": "git merge --no-ff feature-x"
        },
        {
          "desc": "Abort a conflicted merge",
          "cmd": "git merge --abort"
        }
      ],
      "related": [
        "git-branch",
        "git-checkout"
      ],
      "flags_explained": {
        "--no-ff": "Always create a merge commit",
        "--abort": "Cancel and restore pre-merge state",
        "--squash": "Combine into a single staged change"
      }
    },
    {
      "id": "git-stash",
      "keywords": [
        "stash",
        "shelve",
        "save",
        "temporary",
        "wip"
      ],
      "category": "git",
      "command": "git stash",
      "description": "Temporarily shelve uncommitted changes",
      "examples": [
        {
          "desc": "Stash changes",
          "cmd": "git stash"
        },
        {
          "desc": "Restore last stash",
          "cmd": "git stash pop"
        },
        {
          "desc": "List stashes",
          "cmd": "git stash list"
        }
      ],
      "related": [
        "git-status",
        "git-discard"
      ],
      "flags_explained": {
        "pop": "Apply and remove the latest stash",
        "list": "Show all stashes",
        "-u": "Include untracked files"
      }
    },
    {
      "id": "git-diff",
      "keywords": [
        "diff",
        "changes",
        "compare",
        "difference",
        "modified"
      ],
      "category": "git",
      "command": "git diff",
      "description": "Show changes between commits, working tree, and index",
      "examples": [
        {
          "desc": "Unstaged changes",
          "cmd": "git diff"
        },
        {
          "desc": "Staged changes",
          "cmd": "git diff --staged"
        },
        {
          "desc": "Between branches",
          "cmd": "git diff main..feature"
        }
      ],
      "related": [
        "git-status",
        "git-log"
      ],
      "flags_explained": {
        "--staged": "Show staged (cached) changes",
        "--stat": "Summary of changed files",
        "--name-only": "Only file names"
      }
    },
    {
      "id": "git-clone",
      "keywords": [
        "clone",
        "download",
        "copy",
        "repository",
        "repo"
      ],
      "category": "git",
      "command": "git clone <url>",
      "description": "Clone a repository into a new directory",
      "examples": [
        {
          "desc": "Clone a repo",
          "cmd": "git clone https://github.com/user/repo.git"
        },
        {
          "desc": "Shallow clone",
          "cmd": "git clone --depth 1 <url>"
        },
        {
          "desc": "Clone to a named dir",
          "cmd": "git clone <url> mydir"
        }
      ],
      "related": [
        "git-pull",
        "git-remote"
      ],
      "flags_explained": {
        "--depth": "Limit history to N commits (shallow)",
        "--branch": "Clone a specific branch",
        "-b": "Short for --branch"
      }
    },
    {
      "id": "git-pull",
      "keywords": [
        "pull",
        "fetch",
        "update",
        "sync",
        "download"
      ],
      "category": "git",
      "command": "git pull",
      "description": "Fetch from remote and integrate into current branch",
      "examples": [
        {
          "desc": "Pull current branch",
          "cmd": "git pull"
        },
        {
          "desc": "Pull with rebase",
          "cmd": "git pull --rebase"
        },
        {
          "desc": "Pull a specific remote/branch",
          "cmd": "git pull origin main"
        }
      ],
      "related": [
        "git-push",
        "git-clone"
      ],
      "flags_explained": {
        "--rebase": "Rebase local commits onto fetched head instead of merging",
        "--ff-only": "Refuse if a merge commit would be needed"
      }
    },
    {
      "id": "git-push",
      "keywords": [
        "push",
        "upload",
        "publish",
        "send",
        "remote"
      ],
      "category": "git",
      "command": "git push",
      "description": "Upload local commits to the remote repository",
      "examples": [
        {
          "desc": "Push current branch",
          "cmd": "git push"
        },
        {
          "desc": "Push and set upstream",
          "cmd": "git push -u origin feature-x"
        },
        {
          "desc": "Push tags",
          "cmd": "git push --tags"
        }
      ],
      "related": [
        "git-pull",
        "git-commit"
      ],
      "flags_explained": {
        "-u": "Set upstream tracking for the branch",
        "--tags": "Push tags too",
        "--force-with-lease": "Safer force push"
      }
    },
    {
      "id": "git-undo-commit",
      "keywords": [
        "undo",
        "revert",
        "reset",
        "uncommit",
        "rollback"
      ],
      "category": "git",
      "command": "git reset --soft HEAD~1",
      "description": "Undo the last commit but keep the changes staged",
      "examples": [
        {
          "desc": "Undo commit, keep changes staged",
          "cmd": "git reset --soft HEAD~1"
        },
        {
          "desc": "Undo commit and unstage",
          "cmd": "git reset HEAD~1"
        },
        {
          "desc": "Revert a pushed commit safely",
          "cmd": "git revert <hash>"
        }
      ],
      "related": [
        "git-discard",
        "git-commit"
      ],
      "flags_explained": {
        "--soft": "Keep changes staged",
        "--mixed": "Keep changes but unstage (default)",
        "HEAD~1": "One commit before HEAD"
      }
    },
    {
      "id": "add-user",
      "keywords": [
        "add",
        "create",
        "user",
        "account",
        "useradd"
      ],
      "category": "users",
      "command": "sudo adduser <name>",
      "description": "Create a new user account",
      "examples": [
        {
          "desc": "Create a user (interactive)",
          "cmd": "sudo adduser alice"
        },
        {
          "desc": "Low-level create with home",
          "cmd": "sudo useradd -m bob"
        },
        {
          "desc": "Create a system user",
          "cmd": "sudo useradd -r svcuser"
        }
      ],
      "related": [
        "delete-user",
        "change-password",
        "add-to-group"
      ],
      "flags_explained": {
        "-m": "Create the home directory",
        "-r": "Create a system account",
        "-s": "Set the login shell"
      }
    },
    {
      "id": "delete-user",
      "keywords": [
        "delete",
        "remove",
        "user",
        "account",
        "userdel"
      ],
      "category": "users",
      "command": "sudo deluser <name>",
      "description": "Delete a user account",
      "examples": [
        {
          "desc": "Delete a user",
          "cmd": "sudo deluser alice"
        },
        {
          "desc": "Delete user and home dir",
          "cmd": "sudo deluser --remove-home alice"
        },
        {
          "desc": "Low-level delete",
          "cmd": "sudo userdel -r bob"
        }
      ],
      "related": [
        "add-user"
      ],
      "flags_explained": {
        "--remove-home": "Also delete the user's home directory",
        "-r": "(userdel) remove home and mail spool"
      }
    },
    {
      "id": "change-password",
      "keywords": [
        "password",
        "passwd",
        "change",
        "reset",
        "credentials"
      ],
      "category": "users",
      "command": "passwd",
      "description": "Change a user's password",
      "examples": [
        {
          "desc": "Change your own password",
          "cmd": "passwd"
        },
        {
          "desc": "Change another user's (root)",
          "cmd": "sudo passwd alice"
        },
        {
          "desc": "Expire a password now",
          "cmd": "sudo passwd -e alice"
        }
      ],
      "related": [
        "add-user"
      ],
      "flags_explained": {
        "-e": "Force password change on next login",
        "-l": "Lock the account",
        "-u": "Unlock the account"
      }
    },
    {
      "id": "add-to-group",
      "keywords": [
        "group",
        "add",
        "member",
        "groups",
        "usermod"
      ],
      "category": "users",
      "command": "sudo usermod -aG <group> <user>",
      "description": "Add a user to a supplementary group",
      "examples": [
        {
          "desc": "Add user to sudo group",
          "cmd": "sudo usermod -aG sudo alice"
        },
        {
          "desc": "Add to docker group",
          "cmd": "sudo usermod -aG docker $USER"
        },
        {
          "desc": "Show a user's groups",
          "cmd": "groups alice"
        }
      ],
      "related": [
        "add-user",
        "run-as-sudo"
      ],
      "flags_explained": {
        "-a": "Append (don't replace existing groups)",
        "-G": "Supplementary group list"
      }
    },
    {
      "id": "apt-install",
      "keywords": [
        "install",
        "apt",
        "package",
        "add",
        "software"
      ],
      "category": "packages",
      "command": "sudo apt install <pkg>",
      "description": "Install a package with APT (Debian/Ubuntu)",
      "examples": [
        {
          "desc": "Install a package",
          "cmd": "sudo apt install htop"
        },
        {
          "desc": "Install without prompts",
          "cmd": "sudo apt install -y nginx"
        },
        {
          "desc": "Install a specific version",
          "cmd": "sudo apt install nginx=1.18.0-0ubuntu1"
        }
      ],
      "related": [
        "apt-update",
        "apt-remove",
        "apt-search"
      ],
      "flags_explained": {
        "-y": "Assume yes to prompts",
        "--no-install-recommends": "Skip recommended packages"
      }
    },
    {
      "id": "apt-update",
      "keywords": [
        "update",
        "upgrade",
        "apt",
        "refresh",
        "patch"
      ],
      "category": "packages",
      "command": "sudo apt update && sudo apt upgrade",
      "description": "Refresh package lists and upgrade installed packages",
      "examples": [
        {
          "desc": "Refresh package index",
          "cmd": "sudo apt update"
        },
        {
          "desc": "Upgrade everything",
          "cmd": "sudo apt upgrade -y"
        },
        {
          "desc": "Full dist upgrade",
          "cmd": "sudo apt full-upgrade"
        }
      ],
      "related": [
        "apt-install",
        "list-installed"
      ],
      "flags_explained": {
        "update": "Refresh the package index",
        "upgrade": "Install newer versions of installed packages",
        "-y": "Assume yes"
      }
    },
    {
      "id": "apt-search",
      "keywords": [
        "search",
        "find",
        "apt",
        "package",
        "lookup"
      ],
      "category": "packages",
      "command": "apt search <term>",
      "description": "Search for available packages",
      "examples": [
        {
          "desc": "Search by keyword",
          "cmd": "apt search image editor"
        },
        {
          "desc": "Show package details",
          "cmd": "apt show gimp"
        },
        {
          "desc": "Find which package owns a file",
          "cmd": "dpkg -S /usr/bin/python3"
        }
      ],
      "related": [
        "apt-install",
        "list-installed"
      ],
      "flags_explained": {
        "search": "Full-text search of package names/descriptions",
        "show": "Detailed package info"
      }
    },
    {
      "id": "apt-remove",
      "keywords": [
        "remove",
        "uninstall",
        "apt",
        "delete",
        "purge"
      ],
      "category": "packages",
      "command": "sudo apt remove <pkg>",
      "description": "Remove an installed package",
      "examples": [
        {
          "desc": "Remove a package",
          "cmd": "sudo apt remove htop"
        },
        {
          "desc": "Remove with config files",
          "cmd": "sudo apt purge nginx"
        },
        {
          "desc": "Remove unused dependencies",
          "cmd": "sudo apt autoremove"
        }
      ],
      "related": [
        "apt-install"
      ],
      "flags_explained": {
        "remove": "Uninstall but keep config",
        "purge": "Remove including config files",
        "autoremove": "Drop orphaned dependencies"
      }
    },
    {
      "id": "list-installed",
      "keywords": [
        "list",
        "installed",
        "packages",
        "dpkg",
        "query"
      ],
      "category": "packages",
      "command": "apt list --installed",
      "description": "List installed packages",
      "examples": [
        {
          "desc": "List all installed",
          "cmd": "apt list --installed"
        },
        {
          "desc": "Count installed packages",
          "cmd": "dpkg -l | grep -c '^ii'"
        },
        {
          "desc": "Search installed",
          "cmd": "apt list --installed | grep nginx"
        }
      ],
      "related": [
        "apt-install",
        "apt-search"
      ],
      "flags_explained": {
        "--installed": "Only show installed packages",
        "-l": "(dpkg) list packages"
      }
    },
    {
      "id": "docker-ps",
      "keywords": [
        "docker",
        "containers",
        "ps",
        "running",
        "list"
      ],
      "category": "docker",
      "command": "docker ps",
      "description": "List running containers",
      "examples": [
        {
          "desc": "Running containers",
          "cmd": "docker ps"
        },
        {
          "desc": "All containers incl. stopped",
          "cmd": "docker ps -a"
        },
        {
          "desc": "Only container IDs",
          "cmd": "docker ps -q"
        }
      ],
      "related": [
        "docker-logs",
        "docker-stop",
        "docker-exec"
      ],
      "flags_explained": {
        "-a": "Show all (incl. stopped)",
        "-q": "Quiet — only IDs",
        "--format": "Custom Go-template output"
      }
    },
    {
      "id": "docker-images",
      "keywords": [
        "docker",
        "images",
        "list",
        "local",
        "repository"
      ],
      "category": "docker",
      "command": "docker images",
      "description": "List locally stored images",
      "examples": [
        {
          "desc": "List images",
          "cmd": "docker images"
        },
        {
          "desc": "Remove an image",
          "cmd": "docker rmi <image>"
        },
        {
          "desc": "Prune dangling images",
          "cmd": "docker image prune"
        }
      ],
      "related": [
        "docker-run",
        "docker-ps"
      ],
      "flags_explained": {
        "-a": "Include intermediate images",
        "-q": "Only image IDs",
        "prune": "Remove unused images"
      }
    },
    {
      "id": "docker-run",
      "keywords": [
        "docker",
        "run",
        "start",
        "container",
        "launch"
      ],
      "category": "docker",
      "command": "docker run <image>",
      "description": "Create and start a container from an image",
      "examples": [
        {
          "desc": "Run interactively",
          "cmd": "docker run -it ubuntu bash"
        },
        {
          "desc": "Run detached with port map",
          "cmd": "docker run -d -p 8080:80 nginx"
        },
        {
          "desc": "Run and auto-remove",
          "cmd": "docker run --rm alpine echo hi"
        }
      ],
      "related": [
        "docker-ps",
        "docker-stop",
        "docker-exec"
      ],
      "flags_explained": {
        "-d": "Detached (background)",
        "-it": "Interactive + TTY",
        "-p": "Publish host:container port",
        "--rm": "Remove on exit",
        "-v": "Mount a volume"
      }
    },
    {
      "id": "docker-logs",
      "keywords": [
        "docker",
        "logs",
        "output",
        "container",
        "debug"
      ],
      "category": "docker",
      "command": "docker logs <container>",
      "description": "Fetch the logs of a container",
      "examples": [
        {
          "desc": "Show logs",
          "cmd": "docker logs web"
        },
        {
          "desc": "Follow live logs",
          "cmd": "docker logs -f web"
        },
        {
          "desc": "Last 100 lines",
          "cmd": "docker logs --tail 100 web"
        }
      ],
      "related": [
        "docker-ps",
        "docker-exec"
      ],
      "flags_explained": {
        "-f": "Follow log output live",
        "--tail": "Show only the last N lines",
        "-t": "Show timestamps"
      }
    },
    {
      "id": "docker-exec",
      "keywords": [
        "docker",
        "exec",
        "shell",
        "enter",
        "container"
      ],
      "category": "docker",
      "command": "docker exec -it <container> bash",
      "description": "Run a command inside a running container",
      "examples": [
        {
          "desc": "Open a shell",
          "cmd": "docker exec -it web bash"
        },
        {
          "desc": "Run a one-off command",
          "cmd": "docker exec web ls /app"
        },
        {
          "desc": "As a specific user",
          "cmd": "docker exec -u root -it web sh"
        }
      ],
      "related": [
        "docker-ps",
        "docker-logs"
      ],
      "flags_explained": {
        "-it": "Interactive + TTY",
        "-u": "Run as a specific user",
        "-e": "Set an environment variable"
      }
    },
    {
      "id": "docker-stop",
      "keywords": [
        "docker",
        "stop",
        "kill",
        "container",
        "remove"
      ],
      "category": "docker",
      "command": "docker stop <container>",
      "description": "Stop a running container",
      "examples": [
        {
          "desc": "Stop a container",
          "cmd": "docker stop web"
        },
        {
          "desc": "Stop all running",
          "cmd": "docker stop $(docker ps -q)"
        },
        {
          "desc": "Force kill",
          "cmd": "docker kill web"
        }
      ],
      "related": [
        "docker-ps",
        "docker-run"
      ],
      "flags_explained": {
        "stop": "Graceful stop (SIGTERM then SIGKILL)",
        "kill": "Immediate SIGKILL",
        "-t": "Seconds to wait before killing"
      }
    }
  ],
  "categories": {
    "files": {
      "name": "File Operations",
      "tasks": [
        "list-files-by-size",
        "find-large-files",
        "compress-folder",
        "disk-usage",
        "find-files-by-name",
        "file-permissions",
        "find-duplicates",
        "create-symlink",
        "extract-archive",
        "copy-files",
        "move-rename",
        "delete-files",
        "create-directory",
        "change-ownership",
        "sync-directories",
        "find-recent-files",
        "find-empty-dirs"
      ]
    },
    "text": {
      "name": "Text Processing",
      "tasks": [
        "search-in-files",
        "find-and-replace",
        "count-lines",
        "compare-files",
        "sort-lines",
        "unique-lines",
        "extract-columns",
        "view-file",
        "json-query",
        "word-frequency"
      ]
    },
    "system": {
      "name": "System Monitoring",
      "tasks": [
        "monitor-cpu",
        "monitor-memory",
        "process-kill",
        "list-processes",
        "watch-command",
        "disk-free",
        "system-uptime",
        "service-status",
        "view-logs",
        "find-process-by-port",
        "schedule-cron",
        "cpu-info",
        "kernel-messages"
      ]
    },
    "network": {
      "name": "Network Operations",
      "tasks": [
        "download-file",
        "check-ports",
        "check-connectivity",
        "dns-lookup",
        "copy-to-remote",
        "check-website",
        "public-ip"
      ]
    },
    "git": {
      "name": "Git Version Control",
      "tasks": [
        "git-status",
        "git-log",
        "git-discard",
        "git-commit",
        "git-branch",
        "git-checkout",
        "git-merge",
        "git-stash",
        "git-diff",
        "git-clone",
        "git-pull",
        "git-push",
        "git-undo-commit"
      ]
    },
    "users": {
      "name": "User Management",
      "tasks": [
        "current-user",
        "who-logged-in",
        "add-user",
        "delete-user",
        "change-password",
        "add-to-group"
      ]
    },
    "packages": {
      "name": "Package Management",
      "tasks": [
        "apt-install",
        "apt-update",
        "apt-search",
        "apt-remove",
        "list-installed"
      ]
    },
    "docker": {
      "name": "Docker",
      "tasks": [
        "docker-ps",
        "docker-images",
        "docker-run",
        "docker-logs",
        "docker-exec",
        "docker-stop"
      ]
    }
  }
}