博客查了几个常用的yum源镜像，发现centos5基本年久失修，无法使用，特意从hub.docker.com内找到centos5镜像提取了yum源进行分享。累~
将以下内容覆盖到：
/etc/yum.repos.d/CentOS-Base.repo
[base] name=CentOS-5 - Base baseurl=http://vault.centos.org/5.11/os/$basearch/ gpgcheck=1 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5 [updates] name=CentOS-5 - Updates baseurl=http://vault.centos.org/5.11/updates/$basearch/ gpgcheck=1 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5 [extras] name=CentOS-5 - Extras baseurl=http://vault.centos.org/5.11/extras/$basearch/ gpgcheck=1 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5 [centosplus] name=CentOS-5 - Plus baseurl=http://vault.centos.org/5.11/centosplus/$basearch/ gpgcheck=1 enabled=0 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5 [contrib] name=CentOS-5 - Contrib baseurl=http://vault.centos.org/5.11/contrib/$basearch/ gpgcheck=1 enabled=0 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5
建立缓存：
yum makecache
更新：
yum update -y
搞定收工，其实CentOS5也不像我想象的这么脆弱~