NAME

unalias - remove alias definitions

 SYNOPSIS

unalias alias-name...

unalias -a

 DESCRIPTION

The unalias utility removes the definition for each alias name specified. See Alias Substitution . The aliases are removed from the current shell execution environment; see Shell Execution Environment .

 OPTIONS

The unalias utility supports the XBD specification, Utility Syntax Guidelines  .

The following option is supported:

-a

Remove all alias definitions from the current shell execution environment.

 OPERANDS

The following operand is supported:

alias-name

The name of an alias to be removed.

 STDIN

Not used.

 INPUT FILES

None.

 ENVIRONMENT VARIABLES

The following environment variables affect the execution of unalias:

LANG

Provide a default value for the internationalisation variables that are unset or null. If LANG is unset or null, the corresponding value from the implementation-dependent default locale will be used. If any of the internationalisation 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 internationalisation 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).

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 catalogues for the processing of LC_MESSAGES .

 ASYNCHRONOUS EVENTS

Default.

 STDOUT

Not used.

 STDERR

Used only for diagnostic messages.

 OUTPUT FILES

None.

 EXTENDED DESCRIPTION

None.

 EXIT STATUS

The following exit values are returned:

0

Successful completion.

>0

One of the alias-name operands specified did not represent a valid alias definition, or an error occurred.

 CONSEQUENCES OF ERRORS

Default.

 APPLICATION USAGE

Since unalias affects the current shell execution environment, it is generally provided as a shell regular built-in.

 EXAMPLES

None.

 FUTURE DIRECTIONS

None.

 SEE ALSO

alias.