参考：https://blog.csdn.net/Jackliu200911/article/details/112058387
创建文件 /etc/yum.repos.d/CentOS-10.repo，添加如下内容，然后执行 yum install vim -y 就可以了。
[base]
name=CentOS-6.10 - Base - valut.centos.org
baseurl=https://vault.centos.org/6.10/os/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6
#released updates
[updates]
name=CentOS-6.10 - Updates - valut.centos.org
baseurl=https://vault.centos.org/6.10/updates/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6
#additional packages that may be useful
[extras]
name=CentOS-6.10 - Extras - valut.centos.org
baseurl=https://vault.centos.org/6.10/extras/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6
一个提供 rpm 源的网站
http://ftp.iij.ad.jp/pub/linux/centos-vault/centos/6.10/os/