alias - Defines or displays aliases
alias [-tx] [alias-name[=string...]]
The C shell has a built-in version of the alias 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/alias. See the csh(1) reference page for a description of the built-in command.
Interfaces documented on this reference page conform to industry standards as follows:
alias: XPG4, XPG4-UNIX
Refer to the
reference page for more information
about industry standards and associated tags.
[Compaq] Sets or lists tracked aliases. [Compaq] Sets or lists exported aliases.
See the ksh(1) reference page for a description of tracked and exported aliases.
Prints the alias definition on standard output. Assigns the value of string to the alias alias-name.
If no options and no operands are specified, all alias definitions are
printed on standard output.
The alias utility creates or redefines alias definitions or writes the values of existing alias definitions to standard output. An alias definition provides a string value that replaces a command name when it is encountered.
An alias definition affects the current shell execution environment
and the execution environments of the subshells of the current shell. When
used as described, the alias definition will not affect the parent process
of the current shell nor any utility environment invoked by the shell.
[Compaq] This reference page describes the creation and maintenance
of aliases. See the
section of the
reference pages for the description of alias substitution.
[Compaq] If you use either the -t option or the -x option, you must use at least one alias-name or alias-name=string operand.
[Compaq] Aliasing is performed when scripts are read, not while they are executed. Therefore, for an alias to take effect, the alias definition command has to be executed before the command that references the alias is read.
[Compaq] Aliases can be used to redefine special built-in commands
but cannot be used to redefine the reserved words listed in the
The following exit values are returned:
One of the name operands specified did not have an alias definition,
or an error occurred.
Change ls to give annotated output in columns: alias ls="ls -CF" Create a simple redo command to repeat previous entries in the command history file: alias r='fc -s' Cause du to use 1K units instead of the default 512-bytes: alias du=du\ -k Set up nohup so that it can deal with an argument that is itself an alias name: alias nohup="nohup "
The following environment variables affect the execution of
Provides a default value for the internationalization
variables that are unset or null. If
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.
If set to a non-empty string value, override
the values of all the other internationalization variables.
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).
Determines the locale for the format and
contents of diagnostic messages written to standard error.
Determines the location of message catalogues
for the processing of
Commands: csh(1), ksh(1), Bourne shell sh(1b), POSIX shell sh(1p), unalias(1)