admin@watchdog:/$ cat /opt/ros/routers.txt 
172.16.48.1
172.16.48.35
172.16.48.37

admin@watchdog:/$ cat /opt/ros/ros-commands 
/system identity print
/system resource print

admin@watchdog:/usr/sbin# cat /etc/monitor.passwd 
remote||password

#!/usr/bin/perl
# By Matthew D. Smith (c) 2007 with help of the orignal script by
# by Ian Redden
# Purpose: To get info or execute commands on a Mikrotik RouterOS.
#
# Prerequisites: Expect, IO::Tty, IO:Stty
#
# Script will log into each router one a time (from ROUTER_LIST) and issue the commands from CMD_LIST one at a time.
#
# Usage: ros-remote [filename]          ie; #ros-remote /opt/ros/ros-commands.txt
#
#
#######################CONFIGURATION########################################

# Text Listing of Routers - Insert Your Filename Here
my $ROUTER_LIST = '/opt/ros/routers.txt';

######################END CONFIGURATION#####################################
#############DO NOT ALTER BELOW THIS LINE###################################

# Open File
open DATA, "$ROUTER_LIST" or die "can't open $ROUTER_LIST $!";

# Assign array to Router List
my @routers_array = <DATA>;

# Close File - Done.
close (DATA);

# Assign variable to command file passed to script
my $CMD_LIST = "$ARGV[0]";

# Loop through each router in Array
foreach my $line (@routers_array)
{

# Use Expect
  use Expect;

# Where is SSH?
  $ssh = "/usr/bin/ssh";

# Get Username/Password
  open(PS,"/etc/monitor.passwd");
   while (<PS>) {
     chomp;
     ($usernm,$pass) = split(/\|\|/, $_);
   }
  close(PS);

        # Command to launch SSH
        $command = "$ssh -l $usernm -i /root/.ssh/id_dsa $line";

        # Use Expect to connect to Router
          $ssh = Expect->spawn("$command");
        # Do not echo Router Banner
          $ssh->log_stdout(0);

# Send Password - enable if user account has password
#   if ($ssh->expect(undef, "password:")) {
#     print $ssh "$pass\r";
#   }

# Send Commands From File
   open( FILE, "< $CMD_LIST" ) or die "can't open $CMD_LIST $!";
   if ($ssh->expect(undef, ">")) {
           while ($cmd = <FILE>) {
              # Echo Commands
              $ssh->log_stdout(1);
              print $ssh "$cmd\r";
              $ssh->expect(undef, ">");
           }
  }
  # Close File
  close FILE;

  #Quit SSH Session
  print $ssh "/quit\r"; 

}

print "\r";