Linux is a Unix-like operating system that runs on computers. Many people choose to use Linux because it is free and open source. However, there are times when you may need to change your Linux hostname. This can be done in a few different ways.
How to change the hostname in Linux
Many Linux users are familiar with the command line tool hostname which can be used to change the hostname of a Linux system. However, there are also a variety of graphical tools available that make changing the hostname much easier. In this article, we will discuss how to change the hostname in Linux using both the command line and graphical tools.
First, we will discuss how to change the hostname using the command line tool. To change the hostname using the command line tool, you will need to first use the hostname command to get the current hostname of the system. Next, you will use the hostname command to change the name of the system to the new desired name. Finally, you will use the ifconfig command to make sure that the new hostname has been reflected in the network settings of the system.
To change the hostname using the graphical tools, first you will need to open the System Configuration tool. This can be done by opening the System tool in the Linux desktop or by typing systemconfig in the terminal. Next, you will need to use the System Configuration tool to locate the Networking tab. Here, you will use the network command to change the network settings of the system to the new desired name. Finally, you will use the ifconfig command to make sure that the new hostname has been reflected in the network settings of the system.
Using the hostname command to change the hostname
In computing, a hostname (short form: hostname) is the name of a computer, a server, a network interface, or other devices on a computer network. It is a human-readable name assigned to a physical or virtual machine, or to an individual device.
Linux is a Unix-like operating system, assembled primarily of free and open source software. It has been used as the basis for many other free, open source operating systems, such as Android, ChromeOS, FreeBSD, and Ubuntu.
When you install Linux, the installer assigns you a temporary hostname, usually linux-installer. You can use the hostname command to change this to something more meaningful, such as blog.example.com. When you access the Linux command line, you are now addressing your computer as blog.example.com.
The command to change the hostname on a Linux computer is as follows:
hostname blog.example.com
Permanent and temporary hostname changes in Linux
If you are looking to make a permanent change to your Linux hostname, then you need to follow the steps below.
1. Log in to your Linux system as the root user.
2. Edit the /etc/hosts file.
3. Add the following line to the file:
127.0.0.1 old_hostname
4. Replace old_hostname with the new hostname that you wish to use.
5. Save the file and exit the editor.
6. Reload the /etc/hosts file using the following command:
service hosts reload
7. Check that the new hostname has been added to the system by running the hostname command.
8. If you wish to make the change temporary, then you can add the following line to the /etc/hosts file:
127.0.0.1 old_hostname_2
9. Save the file and exit the editor.
10. Reload the /etc/hosts file using the following command:
service hosts reload
11. Check that the new hostname has been added to the system by running the hostname command.
12. If you wish to make the change permanent, then you can add the following line to the /etc/hosts file:
127.0.0.1 old_hostname_3
How to change the hostname in Ubuntu
If you’re using Ubuntu, you can easily change the hostname by following these steps:
1) Open a terminal window by clicking on the Ubuntu logo in the top left corner of your desktop and typing “terminal” into the search bar (or pressing Ctrl+Alt+T on a keyboard).
2) Once the terminal window is open, type the following command: sudo hostname linux
This will change the hostname to linux. You can now log out and log back in to see the new name.
How to change the hostname in CentOS
Changing the hostname in a CentOS system is a relatively easy process. To begin, log into the system as root and issue the following command:
hostname newhost
where newhost is the new desired hostname. Once the new hostname has been set, it must be propagated throughout the system. To do this, use the following command:
hostname update
where update is the command to be used. After the update has been completed, the new hostname should be visible on all machines in the system.
Conclusion
Linux can change its hostname with the hostname command.
