ruby работа с ssh

ставим gem net-ssh
gem install 'net-ssh'

#!/usr/bin/env ruby
require 'rubygems'
require 'net/ssh'

HOST = 'localhost'
USER = 'user'
PASS = 'pass'

Net::SSH.start( HOST, USER, :password => PASS ) do|ssh|
  ssh.exec('ls')
end