Centos7更改yum源與更新系統

1.首先備份yum

/ect/yum.repos.d/CentOS-Base.repo 2 mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup

2.替換yum源

替換為阿里源

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

3.生成緩存

yum makecache

4.更新系統

yum -y update

 

ps:如果yum正在運行，要先關掉進程    rm -f  /var/run/yum.pid