help

Get help for builtin

$ help [cd]

$ help

$ help -d [command]

$ help -m [command]

$ help -s [command]

help [options] [pattern]

help displays information about shell builtin commands. It's a Bash builtin that provides documentation for commands built into the shell.
The command shows usage, options, and descriptions for Bash builtins. It's useful for learning about commands like cd, export, and source.

PATTERN

Shell builtin name or pattern.

Short description only.

Man page format.

Usage synopsis only.

Bash specific. Only for builtins, not external commands. Use man for external commands.

help has been part of Bash since early versions, providing built-in documentation for shell commands.

man(1), info(1), bash(1)