How to change your Hostname on Debian

FerdieQO · Sep 24, 2016

After having a fresh VPS or reinstall my VPS to install a new hosting control panel. How can I change the hostname of a Debian Linux system permanently using the command line tools?

LJSHost · Sep 24, 2016

To make a permanent host name change on Debian edit the /etc/hostname file. Replace the contents of the file with your new host name.

Then run: /etc/init.d/hostname.sh start

This will make the change active, you can check the host name by using the hostname command.

VirtuBox · Sep 24, 2016

On Debian/Ubuntu Linux, hostname is set in two files: /etc/hostname and /etc/hosts.

/etc/hostname: short hostname, not FQDN.

Code:

mx

/etc/hosts: static table lookup for hostnames. Warning: Please list the FQDN hostname as first item.

# Part of file: /etc/hosts

Code:

127.0.0.1   mx.example.com mx

LJSHost · Sep 24, 2016

MX is the host name in this example mx.example.com is the FQDN
No, you do not need to add the host name after the FQDN

Either of these examples with /etc/hosts are fine:

127.0.0.1 servername.domain.com
127.0.0.1 servername.domain.com servername

How to change your Hostname on Debian

FerdieQO

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LJSHost

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VirtuBox

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FerdieQO

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LJSHost

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VirtuBox

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