Change Password Automatically (Ubuntu)

change_root_password

#!/usr/bin/expect
# password first argument ,  IP second argument
set arg1 [lindex $argv 1]
set arg2 [lindex $argv 0]
set suffix "123!@#"
spawn ssh -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no -p 86 ihehaadmin@$arg1
expect "password:"
send "$arg2\n";
expect "\[ihehaadmin:"
send "passwd\n";
expect "(current)";
send "$arg2\n";
expect "New password:";
send "$arg2$suffix\n";
expect "Retype";
send "$arg2$suffix\n";
expect "successfully.";
send "exit”;

Need to install expect on ubuntu