Network Configuration in minimal CENTOS 6

install system-config-network-tui and configure using it.

Option #1:

1. edit /etc/sysconfig/network-scripts/ifcfg-eth0 file manually.
2. reboot
3. yum install system-config-network-tui

Option #2:

1. dhclient eth0 (or whatever the alias of your connected adapter is)
2. yum install system-config-network-tui