系统环境:CentOS7
[1] 首先备份/etc/yum.repos.d/CentOS-Base.repo
cp /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup
[2] 进入yum源配置文件所在文件夹
cd /etc/yum.repos.d/
[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)
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.163.com/.help/CentOS7-Base-163.repo
阿里云是:wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
[4] 运行yum makecache生成缓存
yum makecache
[5] 更新系统(时间比较久,主要看个人网速)
yum -y update
[6] 安装vim编辑器
yum -y install vim*