Help command
Command name: man
command English original intent: manual
command the path: / usr / bin / man
execute permissions: All users
Description: For help information (commands, configuration files)
Syntax: man [profile name / command]
command name: info
command English original intent: information
path which the command: / usr / bin / info
execute permissions: All users
description: For help information (commands, configuration files)
syntax: info [profile name / command]
command name: whatis
command the path: / usr / bin / whatis
execute permissions: All users
description: get help information (commands, configuration files)
syntax: whatis [profile name / command]
command name: -help