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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passwd.nntp

PASSWD.NNTP(5)							File Formats Manual						    PASSWD.NNTP(5)

NAME

       passwd.nntp - passwords for connecting to remote NNTP servers

DESCRIPTION

       The file /etc/news/passwd.nntp contains host-name-password triplets for use when authenticating client programs to NNTP servers.  This file
       is normally interpreted by the NNTPsendpassword routine in libinn(3).  Blank lines and lines beginning  with  a	number	sign  (``#'')  are
       ignored.  All other lines should consist of three or four fields separated by colons:
	      host:name:password
	      host:name:password:style

       The  first  field  is the name of a host, and is matched in a case-insensitive manner.  The second field is a user name, and the third is a
       password.  The optional fourth field specifies the type of authentication to use.  The  default	is  ``authinfo''  which  means	that  NNTP
       ``authinfo''  commands are used to authenticate to the remote host.  If either the username or password are empty, then the related command
       will not be sent.  (The ``authinfo'' command is a common extension to RFC 977.)

       For example:
	      ##  UUNET needs a password, MIT doesn't.
	      mit.edu:bbn::authinfo
	      uunet.uu.net:bbn:yoyoma:authinfo

       This file should not be world-readable.

HISTORY

       Written by Rich $alz <rsalz@uunet.uu.net> for InterNetNews.  This is revision 1.14, dated 1996/09/06.

SEE ALSO

       innd(8), libinn(3).

																    PASSWD.NNTP(5)