Password changing in a Script (shell and expect)

chellam · #1 (**permalink**) 08-14-2006

Hi,

Does anybody know how to change the password on multiple servers with a script. I have 300 Sun boxes and the password expiry is set to 30 days. Im in a process to build a script using expect. Need a help from an expert who has already done it.

Regards,
Vinod

System Shock · #2 (**permalink**) 08-14-2006

For yourself?
Get a list of all the boxes in a file, either IPs or hostnames.
The expect script would look something like:

Code:

#!/usr/local/bin/expect --  
spawn telnet [lindex $argv 0]
expect  ogin:
send loginName\r
expect ssword:
send yourPasswd\r
expect yourprompt
send "passwd  loginName\r"
expect  ssword:
send yourPasswd\r
expect ssword:
send newPasswd\r
expect ssword:
send newPasswd\r
expect yourPrompt
send exit\r 
expect  close
exit 0

The above example assumes that the passwd command is going to first ask you for your passwd, then you'll have to enter the new passwd twice.
Before you run it against all boxes, test it with one box. Make sure you log into the box first on another terminal, just in case.

Code:

myscript.exp  hostname

If no issues, remove the hostname from your sever list, then do

Code:

for x in $(cat boxList.txt); do
myscript.exp  $x
done

Quick note, if your prompt is $ or ends in $, you need to comment it out in the expect script., so expect sees it as a regular character. Otherwise it'll go very slow.

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