1.[初始yum源备份]-[yum更换为国内源]-[添加epel扩展源]

#!/bin/bashmkdir /etc/yum.repos.d/backup/mv /etc/yum.repos.d/*.repo /etc/yum.repos.d/backup/if [ `uname -r |awk -F. '{ print $1 }'` -eq 2 ];then    curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-6.repo    curl -o /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-6.repo    yum makecachefiif [ `uname -r |awk -F. '{ print $1 }'` -eq 3 ];then    curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo    curl -o /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo    yum makecachefi

　

　

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