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.