Ubuntu: Set Hostname

Here are steps to properly set the hostname of an Ubuntu server.

HostnameCtl

Get the current hostname with this: 

hostnamectl

To set it, use this:

sudo hostnamectl set-hostname new-hostname (replace new-hostname)

Once set, confirm it with the previous command.

Hosts File

Now, you need to update the hostname in your hosts file, with this: 

sudo nano /etc/hosts

The hosts file lists the hostname in the second entry: 127.0.1.1, like this:

Update the 127.0.1.1 entry with the correct hostname.

Save and close the hosts file after update.