[1] 首先备份/etc/yum.repos.d/CentOS-Base.repo
@H_502_2@mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup
[1] 首先备份/etc/yum.repos.d/CentOS-Base.repo
@H_502_2@mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup
[3] 下载163的yum源配置文件，放入/etc/yum.repos.d/(操作前请做好相应备份)
[4] 运行yum makecache生成缓存
[5] 更新系统
[6] 安装vim编辑器
