Help and manual pages

Help

<command> help
<command> -h
<command> --help

Manual pages

man <command>

Pipe man page into text editor

man <command> | col -b | <editor>

Output man page to file

man <command> | col -b > <file>

Command Information

Show how command would be interpreted when run

type <command>

Show all possible definitions of a specified name

type -a <command>