How to Set or Change System Hostname in Linux

Device or system hostnames are used to easily recognize a machine within a network in a human readable format. It is not much of a surprise, but on Linux system, the hostname can be easily changed by using simple command as “hostname“.

Read Also: How to Set Static IP Address and Configure Network in Linux

Running hostname on its own, without any parameters, will return the current hostname of your Linux system like this:

$ hostname

If you want to change or set hostname of your Linux system, simply run:

$ hostname NEW_HOSTNAME

Of course, you will need to replace “NEW_HOSTNAME” with the actual hostname that you wish to set. This will change the hostname of your system immediately, but there is one problem – the original hostname will be restored upon next reboot.

There is another way to change the hostname of your system – permanently. You might have already figured it out that this will require change in some configuration files and you will be correct.

Set System Hostname Permanently in Linux

Newer version of different Linux distributions such as latest Ubuntu, Debian, CentOS, Fedora, RedHat, etc. comes with systemd, a system and service manager that provides a hostnamectl command to manage hostnames in Linux.

To set system hostname on SystemD based distributions, we will use hostnamectl command as shown:

$ sudo hostnamectl set-hostname NEW_HOSTNAME

For Older Linux distributions, which uses SysVinit in short init, can have their hostnames changed by simply editing the hostname file located in:

# vi /etc/hostname

You then have to add another record for the hostname in:

# vi /etc/hosts

For example: TecMint

You then need to run:

# /etc/init.d/hostname restart

On RHEL/CentOS based systems that use init, the hostname is changed by modifying:

# vi /etc/sysconfig/network

Here is a sample of that file:


To keep a permanent hostname change the value next to "HOSTNAME" to the one of your hostname.


This simple article meant to show you a simple Linux trick and I hope that you learned something new.

If you liked this article, then do subscribe to email alerts for Linux tutorials. If you have any questions or doubts? do ask for help in the comments section.

If You Appreciate What We Do Here On TecMint, You Should Consider:

TecMint is the fastest growing and most trusted community site for any kind of Linux Articles, Guides and Books on the web. Millions of people visit TecMint! to search or browse the thousands of published articles available FREELY to all.

If you like what you are reading, please consider buying us a coffee ( or 2 ) as a token of appreciation.

Support Us

We are thankful for your never ending support.

5 thoughts on “How to Set or Change System Hostname in Linux”

  1. I am using capital letters as hostname using the hostnamectl set-hostname command. But hostname is applying small cases.

    Any solution for this?


Got something to say? Join the discussion.

Have a question or suggestion? Please leave a comment to start the discussion. Please keep in mind that all comments are moderated and your email address will NOT be published.

This site uses Akismet to reduce spam. Learn how your comment data is processed.