Learn how to change the hostname of a Linux system in a step-by-step guide. Find out the detailed process for editing the /etc/hostname and /etc/hosts files and restarting the system.
To change the hostname of a Linux system in a more detailed manner, you can follow these steps:
Determine the current hostname: Open a terminal window and run the following command:
hostnamectl
This command displays the current hostname, along with other system information. Make note of the current hostname as you will need it in a later step.
2. Edit the /etc/hostname file: Open the /etc/hostname file using a text editor of your choice. For example, if you are using the nano editor, run the following command:
sudo nano /etc/hostname
Replace the current hostname with the desired one. For example, if the current hostname is ubuntu-desktop, you could change it to new-hostname. Save the changes and close the file.
3. Update the /etc/hosts file: Open the /etc/hosts file using a text editor. For example:
sudo nano /etc/hosts
Locate the line that starts with 127.0.1.1 and change the hostname after it to the new hostname. This line should look similar to the following:
127.0.1.1 old-hostname
Change it to:
127.0.1.1 new-hostnameSave the changes and close the file.
Restart the system: Run the following command to restart the system and apply the changes:
sudo reboot
Alternatively, you can use the following command to apply the changes immediately without restarting the system:
sudo hostnamectl set-hostname new-hostname
After following these steps, the hostname of your Linux system should be changed to the desired one. To confirm the change, you can run the hostnamectl command again.
FAQ
What is a hostname in Linux?
A hostname is a unique identifier that is assigned to a computer on a network. It is used to identify the computer and access its resources.
Why change the hostname in Linux?
The hostname can be changed for various reasons, such as:
To personalize the computer and distinguish it from other computers on the network.
To reflect the purpose or function of the computer.
To resolve hostname conflicts on the network.
Can I change the hostname of a Linux system at any time?
Yes, you can change the hostname of a Linux system at any time.
How do I change the hostname of a Linux system without restarting it?
To change the hostname without restarting the system, you can use the following command:sudo hostnamectl set-hostname new_hostname
Can I change the hostname of a remote Linux system?
Yes, you can change the hostname of a remote Linux system by logging into it through a terminal or SSH and following the steps to change the hostname on a local system.
Do I need to be root or have administrative privileges to change the hostname in Linux?
Yes, you need to be root or have administrative privileges to change the hostname in Linux, as you need to edit the /etc/hostname and /etc/hosts files.
Can I use spaces or special characters in the hostname?
No, you cannot use spaces or special characters in the hostname. The hostname should consist of letters, numbers, and hyphens only.
