Help and documentation tools

This part covers how to find answers on the system itself before searching the web.

Command	Role
man	Full manuals by section
info	Texinfo hypertext manuals
help	Shell builtin help (bash/zsh)
whatis	One-line man summaries
apropos	Keyword search of man names/descriptions

Suggested workflow

1. whatis cmd or cmd --help for a quick hint.
   
2. man cmd for the full story; try man 5/man 8 for configs/admin.
   
3. apropos keyword when you forget the command name.
   
4. info coreutils for deep GNU tool docs.
   
5. For short community examples, tools like tldr are optional extras.

Shell builtins vs external commands

type ls
type cd
help cd          # builtin
man ls           # external

Continue with the individual command pages in this part.