How to Set Static IP on CentOS/RHEL

This article assume that you have installed CentOS or RHEL with minimum packages by unchecked all the software during the installation. Therefore, you will not be able to perform TCP/IP configuration using system-config-network or setup command which provide GUI solution. With minimum packages installed, there is the simple way to change your DHCP IP to prefered static IP address. Just follow below steps that was tested on CentOS/RHEL. Lets say the linux ip address is 192.168.2.5, Netmask is 255.255.255.0 and the default gateway is 192.168.2.1.

See also  Securing and Hardening Linux Dedicated Server

The config file for interface “eth0” is located at “/etc/sysconfig/network-scripts/ifcfg-eth0”. If the adapter is configured to use DHCP, the content should be as below :

    cat /etc/sysconfig/network-scripts/ifcfg-eth0
    
    DEVICE=eth0
    BOOTPROTO=dhcp
    HWADDR=00:xx:xx:xx:xx:xx
    ONBOOT=yes
    DHCP_HOSTNAME=[dhcphostname]
    

To change it to static IP address instead, please configure as below :

    vi /etc/sysconfig/network-scripts/ifcfg-eth0
    
    DEVICE=eth0
    BOOTPROTO=none
    HWADDR=00:xx:xx:xx:xx:xx
    ONBOOT=yes
    TYPE=Ethernet
    NETMASK=255.255.255.0
    IPADDR=192.168.2.5
    GATEWAY=192.168.2.1
    

When configuration are done, please run /etc/init.d/network restart to apply the changes

Thats all. Hope this article useful for the beginner.

How to Reset the Directory Manager Password on RHEL 7 / CentOS 7
How to Reset the Directory Manager Password on RHEL 7 / CentOS 7

It is best practice to remember passwords, but because too many passwords, sometimes we forget. We are not encouraged to write the password on any paper or share the password...

How to Find Big Files Size on Linux RHEL/CentOS
How to Find Big Files Size on Linux RHEL/CentOS

As the linux administrator, sometimes we have to identify which files are most take much space in the linux server resulting in low free space. Low disk space can also...

Why Linux users should worry about malware and what they can do about it
Why Linux users should worry about malware and what they can do about it

Don’t drop your guard just because you’re running Linux. Preventing the spread of malware and/or dealing with the consequences of infection are a fact of life when using computers. If...

How to Reset Forgotten Root Password on Linux RHEL 7/CentOS 7
How to Reset Forgotten Root Password on Linux RHEL 7/CentOS 7

This article will explain the steps to reset a lost root password or to reset forgotten root password on Linux RHEL 7 or CentOS 7. Basically, the steps will adding...

How to Update CentOS or Upgrade CentOS to the Latest Version
How to Update CentOS or Upgrade CentOS to the Latest Version

Recently, the latest version of CentOS 7.3 was released. All users of CentOS 7.0, 7.1 and 7.2 can upgrade their system to the most recent. This quick guide will explain...

How to Change your WordPress Username, Nickname and Display Name in MySQL
How to Change your WordPress Username, Nickname and Display Name in MySQL

After you create an account log in WordPress, you may want to change your WordPress username, as appropriate or due to security reason. However, you can not do this from...

How to Enable SSH Root Login on Ubuntu 16.04
How to Enable SSH Root Login on Ubuntu 16.04

As what we wrote in the previous article on how to allow SSH root on Ubuntu 14.04, after installing a fresh new copy of Ubuntu 16.04 LTS, we find that...

How to Change UUID of Linux Partition on CentOS 7
How to Change UUID of Linux Partition on CentOS 7

UUID (Universally Unique IDentifier) should be unique and it is used to identify storage devices on a linux system. If you cloned a virtual machine from vCenter, the metadata containing...

1 Trackback or Pingback

Leave a Reply

Your email address will not be published. Required fields are marked *