Display helpful information about commands.

man [-k] [command]

man intro

man bash

info [command]

help [-s] [command]


-s Short usage synopsis, restricts the information displayed.

-k Search by command description rather than command name.

intro An overview of basic commands

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Press to exitFor simplicity, this website includes both internal GNU bash commands and external unix commands in a single list. Many more commands are available and the man command will list the full details of these.

Internal means a command built into the shell, it&qt;&qt;s the shell that performs the action.
External means the shell will fork and execute an external program as a new subprocess. External commands are available when running any shell.

For example, the cd command is built-in. The ls command, is external.

The man command lists all the internal commands for bash under man bash