These are the steps to add the second IP address to your existing network adapter.
Become root on your system, either by logging into that account or using the su command.
Change your current directory to the /etc/sysconfig/network-scripts directory with the command:
cd /etc/sysconfig/network-scripts
Check for existing network adapters with the command:
ls ifcfg-*
In most instances, you will see the files ifcfg-eth0 and ifcfg-lo. If you see other files with any other names and are unfamiliar with configuring TCP/IP, you may want to consult with your system administrator before proceeding or contact
support@usefulutilities.com.
Edit /etc/hosts and add a line for your new address and name such as:
198.168.1.1 xyx.mydomain.com
To create the new interface, you will copy ifcfg-eth0 to ifcfg-eth0:0 with the command:
cp ifcfg-eth0 ifcfg-eth0:0
Next, edit icfg-eth0:0 and change the DEVICE line to be similar to:
DEVICE=eth0:0
and change the IPADDR line to be similiar to:
IPADDR=198.168.1.1
To activate the new IP address, issue a command similar to:
./ifup eth0:0
