Get help on Linux unset Command.

   Linux unset command is use to unset values and attributes of shell variables and functions on Linux system.  The Linux unset command is one of bash shell built in command.  The command example below show how to get unset command manual or help on Linux unset command using shell command, this help show information on how to use the Linux unset command, the unset command options and the arguments that can be use with Linux unset command.

Get Linux unset command help

  Execute help command and the name of Linux command that we want the help file, the example below we execute help command with -m option to get the help for unset command using the manpage format.

[linux@fedora11 ~]$ help -m unset

NAME

    unset - Unset values and attributes of shell variables and functions.

SYNOPSIS

    unset [-f] [-v] [name ...]

DESCRIPTION

    Unset values and attributes of shell variables and functions.

    For each NAME, remove the corresponding variable or function.

    Options:

      -f        treat each NAME as a shell function

      -v        treat each NAME as a shell variable

    Without options, unset first tries to unset a variable, and if that fails,

    tries to unset a function.

    Some variables cannot be unset; also see `readonly'.

    Exit Status:

    Returns success unless an invalid option is given or a NAME is read-only.

SEE ALSO

    bash(1)

IMPLEMENTATION

    GNU bash, version 4.0.16(1)-release (i386-redhat-linux-gnu)

    Copyright (C) 2009 Free Software Foundation, Inc.

    License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>

[root@fedora11 ~]#

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