1. 首先备份/etc/yum.repos.d/CentOS-Base.repo
mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup
2. 下载对应版本repo文件,放入/etc/yum.repos.d/(操作前请做好相应备份)
CentOS7
wget http://mirrors.163.com/.help/CentOS7-Base-163.repo /etc/yum.repos.d
CentOS6
wget http://mirrors.163.com/.help/CentOS6-Base-163.repo /etc/yum.repos.d
CentOS5
wget http://mirrors.163.com/.help/CentOS5-Base-163.repo /etc/yum.repos.d
3. 运行以下命令生成缓存
yum clean all yum makecache原文链接：https://www.f2er.com/centos/379490.html
