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How to change the server name

To do this you should use the hostname command:

hostname

for instance:

hostname ns1.server.com
(Where "ns1.server.com" is the name of your machine)

Then you need to edit some configuration files.

Debian/ Ubuntu

/etc/hostname

You need to put hostname there, it can be done in the following way:

echo "ns1.server.com" >> /etc/hostname

Where "ns1.server.com" is the name of your machine

or

vi /etc/hostname

now it should look like:

cat /etc/hostname

ns1.server.com

CentOS / Redhat

You have to edit /etc/sysconfig/network

cat /etc/sysconfig/network

NETWORKING=yes
HOSTNAME=dXXXX.seedhost.eu
GATEWAY=213.186.XX.254

Just change the HOSTNAME variable

For instance :

vi /etc/sysconfig/network

after edit file it should look like that:

NETWORKING=yes
HOSTNAME=ns1.server.com
GATEWAY=213.186.XX.254

Now you have to edit /etc/hosts

cat /etc/hosts

127.0.0.1 localhost.localdomain localhost
213.186.XX.XX dXXXX.seedhost.eu

vi /etc/hosts

Just change the variable dXXXX.seedhost.eu

cat /etc/hosts

127.0.0.1 localhost.localdomain localhost
213.186.XX.XX ns1.server.com

Gentoo

nano -w /etc/conf.d/hostname

hostname="ns1.server"

FreeBSD

As root, type "hostname ", and the hostname will be changed
instantly. To keep this change across reboots, edit the file
'/etc/rc.conf', and add such a line:

Set the hostname variable to your host name:

hostname="ns1.server.com"

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