foo.rb

#!/usr/bin/env ruby

require 'net/ssh'

def main
  if ARGV.size < 3 then
    puts 'usage: <hostname> <username> <password>'
  else
    hostname = ARGV[0]
    username = ARGV[1]
    password = ARGV[2]
    n = 1000
    foo(hostname, username, password)
  end
end

def foo(hostname, username, password, n = 500)
  Net::SSH.start(hostname, username, password: password) do |ssh|
    ssh.open_channel do |channel|

      channel.on_close do
        puts 'shell closed'
      end

      channel.on_data do |c, data|
        puts data
      end

      channel.send_channel_request 'shell'

      (1..n).each do |i|
        channel.send_data "ls -la\n"
      end
      #puts "exit\n"
      channel.send_data "exit\n"

    end
    ssh.loop
  end
end

main