centos - yum 换源

centos7

1. 备份

mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.bak

2. 换源

# 阿里源
wget -O /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo
# 或者
curl -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo

3. 生成缓存

yum makecache

4. 升级 yum

yum -y update
yum -y upgrade

centos - yum 换源

原文：https://www.cnblogs.com/Icarus0727/p/15236508.html