alias(1) manual page
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alias, unalias - create or remove a pseudonym or shorthand for
a command or series of commands
/usr/bin/alias [alias-name[=string]
...]
/usr/bin/unalias alias-name ...
/usr/bin/unalias -a
alias [ name [ def ] ]
unalias pattern
**
- alias [ -tx ] [ name[ =value ] ] ...
-
unalias name...
SUNWcsu
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 specified by this document, the alias definition
will not affect the parent process of the current shell nor any utility
environment invoked by the shell.
The unalias utility removes
the definition for each alias name specified. The aliases are removed from
the current shell execution environment.
alias assigns def to the alias
name. def is a list of words that may contain escaped history-substitution
metasyntax. name is not allowed to be alias or unalias. If def is omitted,
the alias name is displayed along with its current definition. If both name
and def are omitted, all aliases are displayed.
Because of implementation
restrictions, an alias definition must have been entered on a previous
command line before it can be used.
unalias discards aliases that match
(filename substitution) pattern. All aliases may be removed by ‘unalias *’.
alias with no arguments prints the list of aliases in the form name=value
on standard output. An alias is defined for each name whose value is given.
A trailing space in value causes the next word to be checked for alias
substitution. The -t flag is used to set and list tracked aliases. The value
of a tracked alias is the full pathname corresponding to the given name.
The value becomes undefined when the value of PATH
is reset but the aliases
remained tracked. Without the -t flag, for each name in the argument list
for which no value is given, the name and value of the alias is printed.
The -x flag is used to set or print exported aliases. An exported alias
is defined for scripts invoked by name. The exit status is non-zero if a
name is given, but no value, and no alias has been defined for the name.
The aliases given by the list of names may be removed from the alias list
with unalias.
The following option is supported by unalias:
- -a
- Remove
all alias definitions from the current shell execution environment.
The
following operands are supported:
- alias-name
- Write the alias definition
to standard output.
- alias-name
- The name of an alias to be removed.
- alias-name=string
- Assign the value of string to the alias alias-name.
If
no operands are given, all alias definitions will be written to standard
output.
The format for displaying aliases (when no operands or only
name operands are specified) is:
"%s=%s\n" name, value
The value string
will be written with appropriate quoting so that it is suitable for reinput
to the shell.
.- Change ls to give a columnated, more annotated output:
alias ls="ls -CF"
.- Create a simple ‘redo’ command to repeat previous entries
in the command history file:
alias r=’fc -s’
.- Use 1K units for du:
alias du=du\
-k
.- Set up nohup so that it can deal with an argument that is itself an alias
name:
alias nohup="nohup "
See environ(5)
for descriptions of
the following environment variables that affect the execution of alias
and unalias: LC_CTYPE
, LC_MESSAGES
, and NLSPATH
.
The following exit values are returned:
- Successful completion.
- >0
- One of the alias-name operands specified did not have an alias definition,
or an error occurred.
- >0
- One of the alias-name operands specified did
not represent a valid alias definition, or an error occurred.
csh(1)
,
ksh(1)
, shell_builtins(1)
, environ(5)
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