You can create virtual IP addresses on Oracle Linux, Redhat and Centos Operating Systems with below operations.
Virtual IP address can be temporary or static according to your wishes. You have to have a ethernet adaptor interface for example eth0. You can use ifconfig eth0:0 <IP address> syntax to create temporary virtual IP.
Create Temporary Virtual IP
[root@test ~]# ifconfig eth0:0 192.168.27.150
Delete Temporary Virtual IP
[root@test ~]# ifconfig eth0:0 down
Create Static Virtual IP
[root@test ~]# cd /etc/sysconfig/network-scripts
[root@test ~]# vi ifcfg-eth0:0DEVICE=eth0:0
IPADDR=192.168.27.150
NETMASK=255.255.255.0
NETWORK=192.0.0.0
BROADCAST=192.168.27.255
ONBOOT=yes
Activate Network Configuration
[root@test ~]# service network restart