centos7更新yum源

Centos7更新yum源

1、备份原有yum源

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

2、选择可用的yum源

# 阿里云
$ wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo 
# 163
$ wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.163.com/.help/CentOS7-Base-163.repo

3、生成缓存

$ yum clean all  # 清除yum缓存
$ yum makecache  # 重建缓存
$ yum -y update  # 升级所有包