安装redis集群，时候安装ruby redis接口报错问题

前提：

安装ruby完成：安装方法：编译安装！1.9.3以上版本

错误描述：gem install --local /usr/local/src/redis-3.3.0.gem 

ERROR:  Loading command: install (LoadError)
    cannot load such file -- zlib
ERROR:  While executing gem ... (NameError)
    uninitialized constant Gem::Commands::InstallCommand

解决办法：安装redis集群的ruby接口报错解决方法：

1）下载redhat6.7对应的iso镜像挂载

mount -o loop /datafs/redhatiso/rhel-server-6.5-x86_64-dvd.iso  /mnt/ 

2）配置yum源：

vi rhel67.repo 
[RHEL67]
name=RHEL67
baseurl=file:///mnt/Server
enabled=1
gpgcheck=0 

gem install --local /usr/local/src/redis-3.3.0.gem

报错：**************************cannot load such file -- zlib**************

执行： yum install zlib-devel

cd   ruby安装目录/ext/zlib

ruby extconf.rb  
make  
make install

重新执行：

gem install --local /usr/local/src/redis-3.3.0.gem

安装成功！

gem install --local /usr/local/src/redis-3.3.0.gem