The hostname is used to identify the server when it is connected to the network and configured during the initial server setup. Changing the initial hostname of a server is a task that you might do when using a server and in this tutorial we will show you how to change the hostname on a Linux VPS running CentOS 7 or Ubuntu 16.04 as the operating system.
What is a hostname?
Hostname is a label used to identify a machine and will help you easily distinguish a server from another. The hostname must be a fully qualified domain name (FQDN) and must point to the IP address of the server so that you can access the server using it.
Check the current hostname
Changing the hostname is a fairly simple process, and only takes a few minutes of your time. You will need to connect to the server via SSH to be able to make this change. If you don’t know how to connect to a server via SSH, you can use our guide that is available here.
After you login, you need to determine the current hostname. If you are using CentOS 7 VPS or Ubuntu 16.04 VPS you can use command
# hostnamectl status
The output should be similar to the output below:
Static hostname: vps.server.ru Icon name: computer-container Chassis: container Machine ID: * * * Boot ID: * * * Operating System: CentOS Linux 7 (Core) CPE OS Name: cpe:/o:centos:centos:7 Kernel: Linux 2.6.32-042stab120.3 Architecture: x86-64
Value static hostname this is the value you should be looking at.
Changing the current hostname
To change the hostname on your CentOS or Ubuntu machine, you must run the following command:
# hostnamectl set-hostname virtual.server.ru
Please note that you need to replace
virtual.server.com with the new hostname you want to use.
Now when you check the current state of the hostname with the command
hostnamectl status, you will see the new hostname
virtual.server.ru instead of the old
vps.server.ru… This means that you have successfully changed the hostname on the server.
Additional command line parameters
For more command options, you can add the flag
--help at the end.
# hostnamectl --help hostnamectl [OPTIONS...] COMMAND ... Query or change system hostname. -h --help Show this help --version Show package version --no-ask-password Do not prompt for password -H --host=[[email protected]]HOST Operate on remote host -M --machine=CONTAINER Operate on local container --transient Only set transient hostname --static Only set static hostname --pretty Only set pretty hostname Commands: status Show current hostname settings set-hostname NAME Set system hostname set-icon-name NAME Set icon name for host set-chassis NAME Set chassis type for host set-deployment NAME Set deployment environment for host set-location NAME Set location for host