unalias - mand or series of commands
/usr/bin/alias [alias-name[= string...]] /usr/bin/unalias alias-name... /usr/bin/unalias -a csh alias [name [def]] unalias pattern ksh88 alias [-tx] [name[= value]...] unalias name... unalias [-a] ksh alias [-ptx] [name[= value]...] unalias [-a] [name...]
alias(1) User Commands alias(1) NAME alias, unalias - create or remove a pseudonym or shorthand for a com- mand or series of commands SYNOPSIS /usr/bin/alias [alias-name[= string...]] /usr/bin/unalias alias-name... /usr/bin/unalias -a csh alias [name [def]] unalias pattern ksh88 alias [-tx] [name[= value]...] unalias name... unalias [-a] ksh alias [-ptx] [name[= value]...] unalias [-a] [name...] DESCRIPTION The alias and unalias utilities create or remove a pseudonym or short- hand term for a command or series of commands, with different function- ality in the C-shell and Korn shell environments. /usr/bin/alias The alias utility creates or redefines alias definitions or writes the values of existing alias definitions to standard output. An alias defi- nition 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 does not affect the parent process of the current shell nor any utility environ- ment invoked by the shell. /usr/bin/unalias The unalias utility removes the definition for each alias name speci- fied. The aliases are removed from the current shell execution environ- ment. The -a option removes all alias definitions from the current exe- cution environment. csh alias assigns def to the alias name. The assigned def is a list of words that can 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 can be removed by `unalias *'. ksh88 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 specified. 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 cor- responding to the specified 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 speci- fied, 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 spec- ified, but no value, and no alias has been defined for the name. The aliass specified by the list of names can be removed from the alias list with unalias. ksh alias creates or redefines alias definitions or writes the existing alias definitions to standard output. An alias definition provides a string value that replaces a command name when the command is read. Alias names can contain any printable character that is not special to the shell. If an alias value ends in a SPACE or TAB, the word following the command name the alias replaces is also checked to see whether it is an alias. If no names are specified, the names and values of all aliases are written to standard output. Otherwise, for each name that is specified, and =value is not specified, the current value of the alias correspond- ing to name is written to standard output. If =value is specified, the alias name is created or redefined. alias is built-in to the shell as a declaration command so that field splitting and pathname expansion are not performed on the arguments. Tilde expansion occurs on value. An alias definition only affects scripts read by the current shell environment. It does not affect scripts run by this shell. unalias removes the definition of each named alias from the current shell execution environment, or all aliases if -a is specified. It does not affect any commands that have already been read and subsequently executed. OPTIONS The following option is supported by unalias: -a Removes all alias definitions from the current shell execution environment. ksh88 The following option is supported by alias: -t Sets and lists tracked aliases. ksh The following options are supported by alias: -p Causes the output to be in the form of alias commands that can be used as input to the shell to recreate the current aliases. -t Specifies tracked aliases. Tracked aliases connect a command name to the command's pathname, and are reset when the PATH variable is unset. The tracked aliases feature is now obsolete. -x Ignored, this option is obsolete. The following option is supported by unalias: -a Causes all alias definitions to be removed. name operands are optional and ignored if specified. OPERANDS The following operands are supported: alias alias-name Write the alias definition to standard output. unalias 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 specified, all alias definitions are written to standard output. OUTPUT The format for displaying aliases (when no operands or only name oper- ands are specified) is: "%s=%s\n" name, value The value string is written with appropriate quoting so that it is suitable for reinput to the shell. EXAMPLES Example 1 Modifying a Command's Output This example specifies that the output of the ls utility is columnated and more annotated: example% alias ls="ls -CF" Example 2 Repeating Previous Entries in the Command History File This example creates a simple "redo" command to repeat previous entries in the command history file: example% alias r='fc -s' Example 3 Specifying a Command's Output Options This example provides that the du utility summarize disk output in units of 1024 bytes: example% alias du=du -k Example 4 Dealing with an Argument That is an Alias Name This example sets up the nohup utility so that it can deal with an argument that is an alias name: example% alias nohup="nohup " ENVIRONMENT VARIABLES See environ(7) for descriptions of the following environment variables that affect the execution of alias and unalias: LANG, LC_ALL, LC_CTYPE, LC_MESSAGES, and NLSPATH. EXIT STATUS The following exit values are returned: 0 Successful completion. alias >0 One of the alias-name operands specified did not have an alias definition, or an error occurred. unalias >0 One of the alias-name operands specified did not represent a valid alias definition, or an error occurred. ATTRIBUTES See attributes(7) for descriptions of the following attributes: csh, ksh88 +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |system/core-os | +-----------------------------+-----------------------------+ |Interface Stability |Committed | +-----------------------------+-----------------------------+ |Standard |See standards(7). | +-----------------------------+-----------------------------+ ksh +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |system/core-os | +-----------------------------+-----------------------------+ |Interface Stability |Uncommitted | +-----------------------------+-----------------------------+ SEE ALSO csh(1), ksh(1), ksh88(1), shell_builtins(1), attributes(7), environ(7), standards(7) Solaris 11.4 8 Apr 2008 alias(1)