yum update出現 14: PYCURL ERROR 6 - "Couldn't resolve host 'mirrorlist.centos.org'"

[root@guest0 ~]# yum update
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
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 find a valid baseurl for repo: base

解決方法

vi /etc/resolv.conf

nameserver 8.8.8.8
nameserver 8.8.4.4
nameserver 127.0.0.1

重啟網路就ok