unalias - remove alias definitions

The built-in unalias command in the POSIX shell sh deletes the alias variables entered using alias.

Syntax

Format 1:	unalias name ...
Format 2:	unalias -a

Format 1:

unalias name ...

name

The alias definition specified in name is deleted.

Format 2:

unalias -a

-a

All alias definitions are deleted.

Locale

The following environment variables affect the execution of unalias:

LANG

Provide a default value for the internationalization variables that are unset or null. If LANG is unset of null, the corresponding value from the implementation-specific default locale will be used. If any of the internationalization variables contains an invalid setting, the utility will behave as if none of the variables had been defined.

LC_ALL

If set to a non-empty string value, override the values of all the other internationalization variables.

LC_CTYPE

Determine the locale for the interpretation of sequences of bytes of text data as characters (for example, single- as opposed to multi-byte characters in arguments and input files), the classification of characters as upper- to lower-case, and the mapping of characters from one case to the other.

LC_MESSAGES

Determine the locale that should be used to affect the format and contents of diagnostic messages written to standard error.

NLSPATH

Determine the location of message catalogs for the processing of LC_MESSAGES.

Example

The existing alias definitions are output and the alias variable defined with the name lx is

deleted.

$ alias

...

ll='ls -al'

local=typeset

ls=/usr/bin/ls

lx='ls -l'

nohup='nohup '

...

$ unalias lx

$ alias

...

ll='ls -al'

local=typeset

ls=/usr/bin/ls

nohup='nohup '

...

See also

alias