今天学习redis时，用yum直接安装redis直接报错，后来百度一下得到一下解决方案。

1：去下面的网站下载EPEL对应的版本：（epel是fedora维护的yum源，里面软件众多）
http://fedoraproject.org/wiki/EPEL
2：我下载的是这个：
wget http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm
3：安装epel：
rpm -ivh epel-release-6-8.noarch.rpm
warning: epel-release-6-8.noarch.rpm: Header V3 RSA/SHA256 Signature, key ID 0608b895: NOKEY
Preparing...                ########################################### [100%]
   1:epel-release           ########################################### [100%]

4：安装redis：
[root@CentOS6 ~]# yum install redis
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
epel/metalink                                            | 4.1 kB     00:00    
* base: mirrors.btte.net
* epel: mirrors.sohu.com
* extras: mirrors.btte.net
* updates: mirrors.btte.net
epel                                                     | 4.3 kB     00:00    
epel/primary_db                                          | 5.0 MB     00:43    
Setting up Install Process
Resolving Dependencies
--> Running transaction check
---> Package redis.x86_64 0:2.4.10-1.el6 will be installed
--> Finished Dependency Resolution
Dependencies Resolved
================================================================================
Package         Arch             Version                  Repository      Size
================================================================================
Installing:
redis           x86_64           2.4.10-1.el6             epel           213 k
Transaction Summary
================================================================================
Install       1 Package(s)
Total download size: 213 k
Installed size: 668 k
Is this ok [y/N]:y