step1.备份
mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup
step2.下载新的CentOS-Base.repo 到/etc/yum.repos.d/
CentOS 6
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-6.repo
CentOS 7
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
step3.之后运行yum makecache生成缓存
更新后,速度有明显提升,由30k提升到600k:
![](https://img.haomeiwen.com/i4222138/2f81619a90c4496f.jpg)
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