rpm --import http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-3 vi /etc/yum.conf http://mirror.centos.org/centos/$releasever/ to: http://archive.kernel.org/centos-vault/3.9/ or: http://mirrors.aliyun.com/centos-vault/3.9/
rpm --import http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-3 vi /etc/yum.conf http://mirror.centos.org/centos/$releasever/ to: http://archive.kernel.org/centos-vault/3.9/ or: http://mirrors.aliyun.com/centos-vault/3.9/