Setting A Static IP In CentOS

Description:

Follow these steps to set a static IP in CentOS using the command line instead of GUI.

To Resolve:

1. Get your NIC name that you want to configure, in my case eth0

2. Open a terminal, type:

   sudo vi /etc/sysconfig/network-scripts/ifcfg-eth0
   
   # Set the following depending on what you want
   DEVICE="eth0"
   NM_CONTROLLED="yes"
   ONBOOT=yes
   HWADDR=A4:BA:DB:37:F1:04
   TYPE=Ethernet
   BOOTPROTO=static
   NAME="System eth0"
   UUID=5fb06bd0-0bb0-7ffb-45f1-d6edd65f3e03
   IPADDR=192.168.1.44
   NETMASK=255.255.255.0
   

3. Configure the Default Gateway => Open a terminal, type:

   sudo vi /etc/sysconfig/network
   
   # Set the following depending on what you want
   NETWORKING=yes
   HOSTNAME=centos7
   GATEWAY=192.168.1.1
   

4. Restart Network Interface => Open a terminal, type:

   sudo systemctl restart network
   # RHEL 8 is
   sudo systemctl restart NetworkManager
   

5. Configure DNS Server => Open a terminal, type:

   sudo vi /etc/resolv.conf
   
   # Set the following depending on your environment. Primary and Secondary DNS.
   nameserver 8.8.8.8
   nameserver 192.168.1.1
   

6. (optional) If you want to change your hostname => Open a terminal, type:

   sudo hostnamectl set-hostname MyServer01