Linux notes: Linux help commands, Man,help,whatis,apropos

Command name: Man
Function: Get help information
Command path:/usr/bin/man
Usage: Man command or configuration file
Other: Call less to view Help for the command or configuration file.

Command name: Whatis
Function: Get a brief introduction to the command
Command path:/usr/bin/whatis
Usage: Whatis command

Command name: Apropos
Features: Get a brief introduction to the configuration file
Command path:/usr/bin/apropos
Usage: Apropos configuration file

Command name: Help
Function: The help information of the shell built-in commands can only be obtained by helping
Command path: None. Help is a shell built-in command
Usage: Help shell built-in commands

See what the options are for a command:
Command--help

Linux notes: Linux help commands, Man,help,whatis,apropos