unalias(1) — Commands
NAME
unalias − Removes alias definitions
SYNOPSIS
unalias alias-name...
unalias −a
Note
The C shell has a built-in version of the unalias command. If you are using the C shell, and want to guarantee that you are using the command described here, you must specify the full path /usr/bin/unalias. See the csh(1) reference page for a description of the built-in command.
STANDARDS
Interfaces documented on this reference page conform to industry standards as follows:
unalias: XPG4, XPG4-UNIX
Refer to the standards(5) reference page for more information about industry standards and associated tags.
OPTIONS
−aRemoves all alias definitions from the current shell execution environment.
OPERANDS
alias-name
The name of an alias to be removed.
DESCRIPTION
The unalias utility removes the definition for each alias name specified. The aliases are removed from the current shell execution environment.
EXIT STATUS
The following exit values are returned:
0Successful completion.
>0One of the alias-name operands specified did not represent a valid alias definition, or an error occurred.
ENVIRONMENT VARIABLES
The following environment variables affect the execution of unalias:
LANG
Provides a default value for the internationalization variables that are unset or null. If LANG is unset or null, the corresponding value from the default locale is used. If any of the internationalization variables contain an invalid setting, the utility behaves as if none of the variables had been defined.
LC_ALL
If set to a non-empty string value, overrides the values of all the other internationalization variables.
LC_CTYPE
Determines the locale for the interpretation of sequences of bytes of text data as characters (for example, single-byte as opposed to multibyte characters in arguments).
LC_MESSAGES
Determines the locale used to affect the format and contents of diagnostic messages written to standard error.
NLSPATH
Determines the location of message catalogues for the processing of LC_MESSAGES.