Easy way to add DNS server to Centos 6

The minimal install of Centos 6.2 is exactly that. Very minimal while this is good for appliances if you dont know your way around linux and vi it could be a bit hard to get a network connection going.

Here are a few tips i have picked up.

Setup a IP address on a nic

ifconfig eth0 192.168.99.14 netmask 255.255.255.0 up

this will add a default gateway

route add default gw 192.168.99.254

These settings will be removed from the server on reboot. 

Run this to make the nic come up on boot automatically.

# cd /etc/sysconfig/network-scripts/ 
# sed -i -e 's@^ONBOOT="no@ONBOOT="yes@' ifcfg-eth0

To put a dns server in try

echo “nameserver 8.8.8.8” > /etc/resolv.conf

This adds the google dns server to the resolv.conf file and your ready to go.

If you want to use a GUI to setup a perminate IP address try

yum install system-config-network-tui

then system-config-network-tui