Important! RHEL Red Hat CentOS notes. Assign a static IP address.
20180129/DuckDuckGo ?
20180129/https://unix.stackexchange.com/questions/52474/setup-static-ip-in-redhat-6#52475
In file: /etc/sysconfig/network-scripts/ifcfg-eth0:
DEVICE=eth0
BOOTPROTO=STATIC
IPADDR=192.168.0.5
NETMASK=255.255.255.0
GATEWAY=192.168.0.1
ONBOOT=yes
Done!