Test ssh access for a list of machines.

ssh_test.exp

#!/usr/bin/expect
# Usage: ./ssh_test.exp MACHINE_NAME crobins9 ******
set timeout 7
set machine [lindex $argv 0]
set user [lindex $argv 1]
set password [lindex $argv 2]

spawn ssh -oStrictHostKeyChecking=no "$user@$machine"

expect {
  -re "$user@$machine's password:" {
    send "$password\r";
    exp_continue
  } -re "~" {
    send "exit\r";
    exp_continue
  } -re "yes" {
    send "yes\r";
    exp_continue
  }
}

catch wait result
exit [lindex $result 3]

ssh_test_all.sh

#!/usr/bin/env bash

domain='cse.nd.edu'
machine_list='machines'

username=$1
password=$2

while read machine; do
  fqmn=$machine.$domain
  (./ssh_test.exp $fqmn $username $password >/dev/null 2>&1) &
  wait $!
  if [ $? -ne 0 ]; then
    echo $fqmn
  fi
done < "$machine_list"