Change password shell script

#!/usr/local/bin/expect -f


# Password change shell script, tested on Linux and FreeBSD


# ----------------------------------


# It need expect tool. If you are using Linux use following command


# to install expect


# apt-get install expect


# FreeBSD user can use ports or following command:


# pkg_add -r -v expect


# ----------------------------------


# If you are using linux change first line


# From:


#!/usr/local/bin/expect -f


# To:


#!/usr/bin/expect -f


# -----------------------------------------------


# Copyright (c) 2006 nixCraft project 


# This script is licensed under GNU GPL version 2.0 or above


# -------------------------------------------------------------------------


# This script is part of nixCraft shell script collection (NSSC)


# Visit http://bash.cyberciti.biz/ for more information.


# -------------------------------------------------------------------------


# display usage


if {$argc!=2} {


   send_user "usage: $argv0 username password \n"


   exit


}


# script must be run by root user


set whoami [exec id -u]


if {$whoami!=0} {


   send_user "You must be a root user to run this script\n"


   exit


}


#


set timeout -1


match_max 100000


# stopre password


set password [lindex $argv 1]


# username


set user [lindex $argv 0]


# opem shell


spawn $env(SHELL)


# send passwd command


send -- "passwd $user\r"


expect "assword:"


send "$password\r"


expect  "assword:"


send "$password\r"


send "\r"


expect eof