UNALIAS(1) General Commands Manual UNALIAS(1)

unalias — remove alias definitions

unalias alias-name...

unalias -a

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 .

The unalias utility supports the XBD specification, .

The following option is supported:

Remove all alias definitions from the current shell execution environment.

The following operand is supported:

alias-name
The name of an alias to be removed.

Not used.

None.

The following environment variables affect the execution of unalias :

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.
If set to a non-empty string value, override the values of all the other internationalisation variables.
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).
Determine the locale that should be used to affect the format and contents of diagnostic messages written to standard error.
Determine the location of message catalogues for the processing of LC_MESSAGES .

Default.

Not used.

Used only for diagnostic messages.

None.

None.

The following exit values are returned:

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

Default.

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

None.

None.

alias(1) .

February 1997 posix.fail