Mastering the unalias Command: How to Remove Shell Aliases Quickly

unalias: Remove Command Aliases

Function Description

unalias is a built‑in shell command used to delete command aliases. Provide the alias name as an argument to remove a specific alias, or use the -a option to delete all defined aliases.

Command Syntax

unalias [options] [alias]

Common Options

-a

: Cancel all defined aliases

Example Usage

(1) Remove a single alias

// Set an alias first
# alias ok='pwd'
# ok
/root

// Remove the alias
# unalias ok
# ok
-bash: ok: command not found

(2) Remove all aliases

# unalias -a

Notes

(1) When running scripts, be aware that using source to execute a Bash script that contains alias or unalias may affect the current terminal’s alias settings, potentially altering command behavior.

(2) To view or set aliases, use the alias command.