When you try to do yum update, you may get the following error
yum update
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
Could not retrieve mirrorlist http://mirrorlist.centos.org/?release=6&arch=i386& repo=os error was
14: PYCURL ERROR 6 – “”
Error: Cannot find a valid baseurl for repo: base
To resolve this,
1) configure resolv.conf
open file /etc/resolv.conf
vi /etc/resolv.conf
and insert
nameserver 208.67.222.222
nameserver 208.67.220.220
2)configure network
open file /etc/sysconfig/network-scripts/ifcfg-eth0 for edit
vi /etc/sysconfig/network-scripts/ifcfg-eth0
and set
BOOTPROTO=dhcp
NM_CONTROLLED=no
ON_BOOT=yes