root@2556:~/go-derper-master# ruby go-derper.rb -f xx.xx.xx.xx
    /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require': cannot load such file -- memcacheex (LoadError)
            from /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
            from go-derper.rb:6:in `<main>'