docs/
├── 00-introduction/          # CLI Introduction
│   ├── 00-terminal-basics.md    # Terminal and shell fundamentals
│   ├── 01-shell-config.md       # Shell configuration (.bashrc, .zshrc)
│   └── 02-man-and-help.md       # Using manuals and help systems
├── 01-file-operations/       # File Operations
│   ├── 00-navigation.md         # Directory navigation and listing
│   ├── 01-file-crud.md          # Creating, copying, moving, and deleting files
│   ├── 02-permissions.md        # Permissions and ownership
│   └── 03-find-and-locate.md    # File searching
├── 02-text-processing/       # Text Processing
│   ├── 00-cat-less-head-tail.md # Viewing file contents
│   ├── 01-grep-ripgrep.md       # Pattern searching
│   ├── 02-sed.md                # Stream editor
│   ├── 03-awk.md                # Text processing language
│   └── 04-sort-uniq-cut-wc.md   # Sorting and aggregation
├── 03-process-management/    # Process Management
│   ├── 00-ps-top-htop.md        # Process monitoring
│   └── 01-jobs-signals.md       # Job control and signals
├── 04-networking/            # Networking
│   ├── 00-curl-wget.md          # HTTP communication
│   └── 01-ssh-scp.md            # Remote connections
├── 05-shell-scripting/       # Shell Scripting
│   ├── 00-basics.md             # Variables, conditionals, and loops
│   └── 01-advanced-scripting.md # Functions, error handling, and practical patterns
├── 06-system-admin/          # System Administration
│   ├── 00-systemd.md            # systemd and service management
│   └── 01-package-management.md # Package management
└── 07-advanced/              # Advanced Techniques
    ├── 00-tmux-screen.md        # Terminal multiplexers
    └── 01-productivity.md       # Productivity tips and tricks