cd /etc/yum
cd /etc/yum.repos.d/
备份原始的yum源
mv CentOS-Base.repo CentOS-Base.repo.bak
下载yum文件,替代我们刚才备份的那个原始yum源
wget http://mirrors.163.com/.help/CentOS7-Base-163.repo
这两条命令主要是清除和生成新的缓存
如果遇到错误
解决:
systemctl stop NetworkManager
systemctl disable NetworkManager
重新启动网络:
systemctl start network.service