如果有网络,DNS也能用,那么直接很好解决,步骤如下:

1. 有wget
直接参考换源链接即可

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

然后:wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo

2. 无 wget


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

直接访问:http://mirrors.aliyun.com/repo

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