因为个人需要,整理的
参考:https://blog.csdn.net/chavo0/article/details/51939362
1.备份
$ mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.bak
2.下载最新的CentOS-Base.repo 到 /etc/yum.repos.d/
CentOS 5
$ wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-5.repo
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
系统还没下载wget可以先用电脑登陆后面的网址下载下来,然后复制代码进去
3. 运行
$ yum clean all
$ yum list