How to Find Hostname with FQDN in Linux?


Welcome to the world of Linux, where understanding your system’s Fully Qualified Domain Name (FQDN) can be crucial. In this article, we will demystify the process of finding the hostname with FQDN in Linux. Whether you’re a seasoned Linux user or a newbie, this guide will equip you with the knowledge you need to navigate your system effectively. So, let’s dive in and uncover the secrets of Linux’s FQDN!

How to Find Hostname with FQDN in Linux?

In this section, we will explore the fundamental steps to identify your system’s hostname along with its Fully Qualified Domain Name in Linux.

Check the Hostname

The first step in this journey is to check your system’s hostname. Linux provides a simple command to do this:


Executing this command will display your system’s hostname, which is the primary identifier for your device.

Retrieve the FQDN

To obtain the Fully Qualified Domain Name (FQDN), you can utilize the following command:

hostname -f

This command will provide you with the FQDN, which includes both the hostname and the complete domain name associated with your Linux system.

The Hosts File

One of the key factors in determining the FQDN is the /etc/hosts file. This file contains mappings of IP addresses to hostnames and plays a crucial role in Linux networking. You can view the contents of this file using a text editor like nano or vim:

nano /etc/hosts

DNS Resolution

DNS (Domain Name System) resolution also contributes to the determination of FQDN. Linux uses DNS to resolve hostnames to their respective IP addresses. Understanding DNS configuration can be vital in comprehending how your system’s FQDN is resolved.

Using FQDN in Linux Networking

Network Configuration

Linux networking heavily relies on FQDN. You can configure your network settings and assign FQDN to your system using tools like ifconfig and netplan. Proper network configuration ensures that your FQDN is recognized across the network.


When working remotely with Linux servers, knowing the FQDN is essential. You can use the FQDN to establish SSH connections to your server, enhancing security and accessibility.

Troubleshooting FQDN Issues

DNS Problems

Sometimes, FQDN-related issues can arise due to DNS problems. Learn how to diagnose and resolve DNS issues to ensure smooth FQDN resolution.

Hosts File Errors

Errors in the /etc/hosts file can lead to FQDN confusion. We’ll guide you through identifying and rectifying common hosts file errors.

Network Configuration Hiccups

Network misconfigurations can hinder FQDN functionality. Discover how to troubleshoot and rectify network configuration issues effectively.


What is an FQDN?

FQDN stands for Fully Qualified Domain Name, which represents the complete domain hierarchy of a networked device, including its hostname and domain name.

Why is it important to know the FQDN in Linux?

Understanding the FQDN in Linux is crucial for network configuration, remote access, and troubleshooting DNS-related issues.

Can I change my system’s FQDN?

Yes, you can change your system’s FQDN by modifying the /etc/hostname and /etc/hosts files, followed by a system reboot.

What role does DNS play in FQDN resolution?

DNS (Domain Name System) resolves hostnames to their corresponding IP addresses, facilitating FQDN resolution in Linux.

Are there graphical tools available for configuring FQDN?

Yes, Linux offers graphical network configuration tools like NetworkManager, which can help set up FQDN with ease.

How do I test if my FQDN is resolving correctly?

You can use the ping command with your FQDN to check if it resolves to the correct IP address.

How to find hostname with FQDN in Linux?

Use the “hostname -f” command to find the fully qualified domain name (FQDN) of the host in Linux.

How do I find hostname in Linux?

You can find the hostname in Linux by using the “hostname” command.

How do I find my hostname in Linux?

To find your hostname in Linux, simply run the “hostname” command.


In conclusion, mastering the art of finding the hostname with FQDN in Linux is essential for efficient system management and networking. By following the steps and tips outlined in this guide, you’ll be well-equipped to navigate the Linux environment with confidence. Remember that FQDN plays a pivotal role in various aspects of Linux, from networking to remote access. So, dive into the world of Linux and embrace the power of the Fully Qualified Domain Name!

Leave a comment