DHCP with specified DNS servers

Sometimes the nameserver dispatched from the DHCP server doesn't work well.
In that case, you may want to add some nameservers so that the name-resolving task can perform normally.

There are two ways to achieve this objective:
1. Use the Network-Manager via a friendly GUI (We don't discuss it here)
2. Edit /etc/dhcp3/dhcpclient.conf and append one line to last
"prepend domain-name-servers XXX.XXX.XXX.XXX,XXX.XXX.XXX.XXX;"
/etc/init.d/networking restart

Test Distribution: Ubuntu 9.04
Reference: http://hi.baidu.com/nullspace/blog/item/ab37e6506165b35b1138c263.html