CentOS7系统更换YUM Repo源
备份原镜像
sudo mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup
sudo mv /etc/yum.repos.d/epel.repo /etc/yum.repos.d/epel.repo.backup
下载阿里云的Base源和EPEL源
sudo wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
sudo wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo
或者 下载腾讯云的Base源和EPEL源
sudo wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.cloud.tencent.com/repo/centos7_base.repo
sudo wget -O /etc/yum.repos.d/epel.repo http://mirrors.cloud.tencent.com/repo/epel-7.repo
或者 下载163的Base源
sudo wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.163.com/.help/CentOS7-Base-163.repo
清理和生成缓存
sudo yum clean all
sudo yum makecache
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