执行SSH代码
sed -e "s|^mirrorlist=|#mirrorlist=|g" -e "s|^#baseurl=http://mirror.centos.org/\$contentdir/|baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos-vault/|g" -i.bak /etc/yum.repos.d/CentOS-*.repo
sed -e "s|^mirrorlist=|#mirrorlist=|g" -e "s|^#baseurl=http://mirror.centos.org/\$contentdir/|baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos-vault/|g" -i.bak /etc/yum.repos.d/CentOS-*.repo
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