How to change hostname on Ubuntu

When setting up a new server, it’s important to understand its performance capabilities. One effective way to do this is by using the sysbench tool, which provides various benchmarks to test different aspects of system performance. In this blog post, we’ll walk you through the steps to benchmark a Linux host using sysbench.

Step 1: Check Current Hostname

You can verify your system's current hostname by running the following command:

hostname

or

hostnamectl hostname

Step 2: Change the Hostname

To change the hostname run the following command:

sudo hostnamectl set-hostname new-hostname-here

Step 3: Update the Hosts File

The next step is to update the /etc/hosts file to reflect the new hostname. Open the file using the following command:

sudo nano /etc/hosts

Inside the file, you will see an entry containing the old hostname. Replace the old hostname with the new one.

Step 4: Apply the Changes

To apply the changes, you need to reboot your Ubuntu system. Run the following command to restart:

sudo reboot

Conclusion

Changing the hostname on your Ubuntu system is a simple process that involves executing one command and editing a one configuration file. By following the steps outlined in this blog post, you can easily change the hostname to suit your preferences or requirements. Remember to choose a unique and meaningful hostname that adheres to the recommended naming conventions.

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