redis-trib.rb报错:/usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require': cannot load such file -- redis (LoadError)

报错如下:

/usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require': cannot load such file -- redis (LoadError)
    from /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
    from /opt/cluster_test/redis-unstable/src/redis-trib.rb:25:in `<main>'

发现了篇文章，感谢博主：

https://blog.csdn.net/moxiaomomo/article/details/17540813

需要安装ruby到redis的第三方接口：

 gem install redis

前提你需要安装rubygems