Shell Programming and Scripting

still don't see how

I mean I already used passwd as normally used to set the password but now it¿s only changed on node01....cannot find a way to replicate the change on node02

You must log into the other system and run chpasswd. Do you have ssh access?

yes I have ssh

what I mean is this

Code:

ssh $SERVER 'echo "root:123456" | chpasswd'

but instead of using a plain text as you see in the example below is there a way send the encrypted password on /etc/shadow????

This is because I already requested on the menu to change password after that should be something to sync both password same user

don't change the password like that because it will show up in the process list. Here are the quick high level steps that should work for you.

Step 1 - create a file with one user per line in this format

user1:plain_text_pw
user2:plain_text_pw
userN:plain_text_pw

Step 2 - copy this file to each system(scp using public key auth would work great for automation)

Step 3 - run the chpasswd command on each system(run remotely via ssh public key auth)

run it this way so no passwords are displayed in ps. make sure to put the data file in a secure location that root can only access

Code:

chpasswd </path/to/your/file

Depending on the version of your chpasswd command it may be able to handle encrypted passwords in the data file. Check the man page. If it does support it an easy way would be to change the password on one system, grab the hash from /etc/shadow and then use that for the password value in the data file. Of course make sure you use the right option for encryption used. In most cases it will be md5.

hope this helps.