How to add an additional IP address in Centos 7

Method -1:

Create file /etc/sysconfig/network-scripts/ifcfg-eth0:0 with the following content:

DEVICE=eth0:0
ONBOOT=yes
BOOTPROTO=static
IPADDR=192.168.0.11
NETMASK=255.255.255.255

service network restart

Method-2:

Run the following command

ipadd your_ip

Example: ipadd 192.168.0.1

How to add additional IP address to CentOS 7 using command

Navigate to the network interface configuration folder using the following command:
cd /etc/sysconfig/network-scripts

Create a new virtual interface with:
nano ifcfg-eth0:0

The file will be created and opened with the text-editor “nano”. Now the following paragraphs must be added:

DEVICE=eth0:0
BOOTPROTO=none
ONBOOT=yes
IPADDR=192.51.100.42
NETMASK=255.255.255.255

systemctl restart network

or

sudo reboot 

See the video:https://youtu.be/-Y5LXdpnEYY

Followed by: Contabo VPS