linux 切换yum源

linux 切换yum源

查看Centos 版本

cat /etc/os-release

备份现有repo文件

mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup

下载指定版本源

CentOS 5

wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-5.repo

CentOS 6

wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-6.repo

CentOS 7

wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo

清除缓存

yum clean all

yum 会把下载的软件包和header存储在cache中，切换源后使用yum clean指令进行清除，更精确的用法是yum clean headers清除header，yum clean packages清除下载的rpm包，yum clean all一全部清除。

生成缓存

yum makecache