我已经在虚拟机中安装了 CentOS 6 并尝试安装一些软件包
yum install命令给出以下错误
Loaded plugins: fastestmirror, refresh-packagekit
Loading mirror speeds from cached hostfile
http://vault.centos.org/6/os/x86_64/repodata/repomd.xml: [Errno 14] Peer cert cannot be verified or peer cert invalid
Trying other mirror.
Error: Cannot retrieve repository metadata (repomd.xml) for repository: base. Please verify its path and try again
我检查了很多答案，但没有一个有效。请问有人可以指导一下吗？