Fedora 40: Set Hostname

Introduction

Setting the hostname in Fedora 40 is a crucial task for defining the identity of the system within a network. This allows for easier management, identification, and communication within the network.

Overview Set Hostname

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Overview

What

Setting a hostname in Fedora 40 involves configuring the system to use a specific, identifiable name when it communicates over a network. This is essential for system identification and network management.

Who

This guide is intended for system administrators, developers, and IT professionals who need to configure and manage Fedora 40 systems, especially in networked environments.

Where

You can set the hostname on any machine running Fedora 40, whether it's a server, desktop, or virtual machine, as long as it is part of a network.

When

Set the hostname when you are configuring a new Fedora 40 system or when you need to change the system's identity in a network to better reflect its role or location.

Why

Setting the hostname in Fedora 40 has several pros and cons:

Pros	Cons
Improves network management by providing identifiable system names. Facilitates easier administration and troubleshooting. Enhances security by clearly defining systems within a network.	Requires administrative privileges to change. Potential for conflicts if not managed properly. May need to update associated services and configurations.

How

Follow these steps to set the hostname in Fedora 40:

Step 1	Open the terminal.
Step 2	Check the current hostname using the command: hostnamectl
Step 3	Set the new hostname using the command: sudo hostnamectl set-hostname [new-hostname]
Step 4	Verify the new hostname with the command: hostnamectl
Step 5	Update the /etc/hosts file if necessary to reflect the new hostname.
Step 6	Restart the system to apply changes if needed.

Consequences

Setting the hostname can have several consequences:

Positive	Enhances system identification within the network. Facilitates easier management and maintenance. Reduces confusion in multi-system environments.
Negative	May cause temporary disruptions during configuration changes. Requires attention to detail to avoid conflicts and errors. Potential need for updating dependencies and services.

Conclusion

Setting the hostname in Fedora 40 is an important task for ensuring proper system identification and network management. While it offers several advantages in terms of administration and security, it must be done carefully to avoid conflicts and disruptions.

Set Hostname

If you would like to change Host Name of your System, set like follows.

Step [1]Change hostname. (but when System restarted, it will be back)

          
# show current hostname
[root@localhost ~]# hostname
localhost.localdomain
# change hostname
[root@localhost ~]# hostname dlp.bizantum.lab
[root@localhost ~]# hostname
dlp.bizantum.lab     # changed
          
                

Step [2]Change hostname permanently.

          
[root@localhost ~]# hostnamectl set-hostname dlp.bizantum.lab
# show settings
[root@localhost ~]# hostnamectl
     Static hostname: dlp.bizantum.lab
           Icon name: computer-vm
             Chassis: vm
          Machine ID: 278ceb91d2f442f786a0384570a88ba3
             Boot ID: 00efb5f9f527455e9e623d859edc99a1
      Virtualization: kvm
    Operating System: Fedora Linux 40 (Server Edition)
         CPE OS Name: cpe:/o:fedoraproject:fedora:40
      OS Support End: Tue 2025-05-13
OS Support Remaining: 1y 5d
              Kernel: Linux 6.8.8-300.fc40.x86_64
        Architecture: x86-64
     Hardware Vendor: Red Hat
      Hardware Model: KVM
    Firmware Version: 1.16.1-1.el9
       Firmware Date: Tue 2014-04-01
        Firmware Age: 10y 1month 6d