net-ssh

require 'rubygems'
require 'csv'
require 'net/ssh'


CSV.foreach("serverlist.csv",',') do |server|
  host = server[0]
  username = server[1]
  passwd = server[2]
  command = "/bin/ls"

  Net::SSH.start(host, username, :password => passwd) do |ssh|
    result = ssh.exec!(command)
    puts result
    ssh.close
  end
end