如果你在使用yum安装的时候提示以下错误：
Loaded plugins: fastestmirror, security
Could not retrieve mirrorlist http://mirrorlist.centos.org/?release=6&arch=x86_64&repo=os error was
14: PYCURL ERROR 6 - "Couldn't resolve host 'mirrorlist.centos.org'"
Error: Cannot retrieve repository metadata (repomd.xml) for repository: base. Please verify its path and try again
解决办法：
vim /etc/resolve.cnf
添加
nameserver 8.8.8.8
