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alias(1)
NAME
alias - Defines or displays aliases
SYNOPSIS
alias [-tx] [alias-name[=string...]]
Note
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.
STANDARDS
Interfaces documented on this reference page conform to industry standards
as follows:
alias: XCU5.0
Refer to the standards(5) reference page for more information about
industry standards and associated tags.
OPTIONS
-t [Tru64 UNIX] Sets or lists tracked aliases.
-x [Tru64 UNIX] Sets or lists exported aliases.
Note
See the ksh(1) reference page for a description of tracked and
exported aliases.
OPERANDS
alias-name
Prints the alias definition on standard output.
alias-name=string
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.
DESCRIPTION
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.
NOTES
[Tru64 UNIX] This reference page describes the creation and maintenance of
aliases. See the Command Aliasing section of the ksh(1) or sh(1p)
reference pages for the description of alias substitution.
RESTRICTIONS
[Tru64 UNIX] If you use either the -t option or the -x option, you must
use at least one alias-name or alias-name=string operand.
[Tru64 UNIX] 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.
[Tru64 UNIX] Aliases can be used to redefine special built-in commands but
cannot be used to redefine the reserved words listed in the ksh(1)
reference page.
EXIT STATUS
The following exit values are returned:
0 Successful completion.
>0 One of the name operands specified did not have an alias definition, or
an error occurred.
EXAMPLES
1. Change ls to give annotated output in columns:
alias ls="ls -CF"
2. Create a simple redo command to repeat previous entries in the command
history file:
alias r='fc -s'
3. Cause du to use 1K units instead of the default 512-bytes:
alias du=du\ -k
4. Set up nohup so that it can deal with an argument that is itself an
alias name:
alias nohup="nohup "
ENVIRONMENT VARIABLES
The following environment variables affect the execution of alias:
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, override 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 for the format and contents of diagnostic
messages written to standard error.
NLSPATH
Determines the location of message catalogues for the processing of
LC_MESSAGES.
SEE ALSO
Commands: csh(1), ksh(1), Bourne shell sh(1b), POSIX shell sh(1p),
unalias(1)
Standards: standards(5)
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