require 'rubygems'
require 'net/ssh/multi'


HOSTLIST = ['127.0.0.1','127.0.0.1']
USERLIST = ['user','user']
PASSWORD = ['userpegase','userpegase']


Net::SSH::Multi.start(:on_error => :warn) do |session|

  HOSTLIST.each_with_index do |session_server,index|
    session.use session_server , :user =>  USERLIST[index] , :password => PASSWORD[index]
  end

  begin
    session.exec 'pwd' do |ch, stream, data|
      puts "[#{ch[session]} : #{stream}] - #{data}"
    end
  rescue Timeout::Error
   puts "+++++++ Timed out"
  rescue Errno::EHOSTUNREACH
   puts "+++++++ Host unreachable"
  rescue Errno::ECONNREFUSED
   puts "+++++++ Connection refused"
  rescue Net::SSH::AuthenticationFailed
   puts "+++++++ Authentification failure "
  end
  session.loop
end