Change password of linux servers remotely Post: 302374911

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Operating Systems Linux Red Hat Change password of linux servers remotely Post 302374911 by renuka on Wednesday 25th of November 2009 10:12:50 PM

11-25-2009

Registered User

Change password of linux servers remotely

Hi,
I am very bad at scripting. I need help from scripting experts...
I need to change password of around 100 linux remote servers. I have been given a script for changing the password that automates the task. however I do not understand the usage and meaning of the script, the script is an expect script. Could some one please help me understand the script and how to use it? here is the script...

Code:

#!/usr/bin/expect
# usage: runcmd <command> <password>
#
# NB: be sure to surround the command with double quotes
# if the command string is more than 1 word
#
set timeout 30
set fid [open /root/utilz/scripts/hosts r]
set contents [read -nonewline $fid]
close $fid
set cmd [lindex $argv 0]
set password [lindex $argv 1]
set newpass [lindex $argv 2]
foreach host [split $contents "\n"] {
        spawn ssh -l root $host
        expect {
                "assword:" {
                        send -- "$password\r"
                }
                "you sure you want to continue connecting" {
                        send -- "yes\r"
                        expect "assword:"
        send -- "$password\r"
                }
        }
        expect "#"
        send -- "$cmd\r"
        expect "assword:"
        send "$newpass\r"
        expect "assword:"
        send "$newpass\r"
        expect "#"
        send -- "exit\r"

Last edited by pludi; 11-26-2009 at 02:06 PM.. Reason: code tags, please...

renuka

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lpasswd

lpasswd(1)						      General Commands Manual							lpasswd(1)

NAME

       lpasswd - Change group or user password

SYNOPSIS

       lpasswd [OPTION]... [name]

DESCRIPTION

       Changes password of user or group name.

       If  the	name  argument is not provided, username of the invoking user is used; the name argument is ignored if lpasswd is run set-uid to a
       different user.

       Entering an empty password (by pressing Enter) aborts the password setting operation.

OPTIONS

       -F, --plainpassword-fd=fd
	      Read password from file descriptor fd, terminated by end of file, '
' or '
'.

       -f, --password-fd=fd
	      Read password hash from file descriptor fd, terminated by end of file, '
' or '
'.

       -g, --group
	      Change password of group name.  By default the password of user name is changed.

       -i, --interactive
	      Ask all questions when connecting to the user database, even if default answers are set up in libuser configuration.

       -P, --plainpassword=password
	      Set the password to password.  Note that the password can be viewed while running lpasswd using tools such as ps(1).

       -p, --password=encrypted
	      Set the password to the password represented by the hash encrypted.  Note that the hash can be viewed while  running  lpasswd  using
	      tools such as ps(1).

EXIT STATUS

       The exit status is 0 on success, nonzero on error.

libuser 							    Jan 12 2005 							lpasswd(1)