UNIX for Dummies Questions & Answers

I have access to a variety of hosts. I need to be able to reset my password on 400+ hosts every 80 days due to password expiration. I connect to these servers across the country using an ssh telnet terminal. I am a Security Administrator, but I don't manage the Unix machines on our network. Is there an easy or simple way to perform these password resets from the command line? Is there a 1 line command I can enter to reset my password to a given password on a remote server?

My way to change password on remote servers is by ssh with passwordless. ( within same operation system)

1) set the ssh with passwordless to remote root account. So you can login other servers by ssh directly.

2) generate the new encrypted password on your local server, you can copy it from /etc/shadow

3) list all server name in file server_list

server1
server2
server3
...

4) replace the old password on remote server by below command, and put in a loop

Code:

while read server
do
   ssh root@$server perl -i.bak -pe 's/root:encrypted_old_pw/root:encrypted_new_passwd/' /etc/shadow
done < server_list