配置163Yum源自动判断你的系统是Centos版本（适用于5.x或6.x）

 #!/bin/bash
 #Author:nulige
 #Date: 2015-3-8
 #实现功能：自动判断你的系统是Centos版本,适用于5.x或6.x

 mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.$(date +%F)_backup
 cd /etc/yum.repos.d/
 Ver=$(cat /etc/redhat-release |awk -F "." '{print $1}')
 if [ "${Ver}" == "CentOS release 6" ]
 then
 wget http://mirrors.163.com/.help/CentOS6-Base-163.repo
 else
 wget http://mirrors.163.com/.help/CentOS5-Base-163.repo
 fi

 yum clean headers
 yum makecache
 sleep 2
 echo -e "\033[32mPlease select Menu follow:\033[1m]"

 echo "##########################################"
 echo "      The installation is complete        "
 echo "##########################################"