we first save the ssh key in a file.
then login using, ssh -i {sshkey file} [email protected] -p 2220
we need to find the unique line in passwords.new which is not there in passwords.old.
we do this using diff command to find difference between two files.
diff passwords.new passwords.old will give two lines unique to passwords.new and passwords.old respectively.
So, the first string is our psswd, save it and exit.