Setting the hostname
During installation, you were asked to create a hostname for your server. Specifically, the field was labeled Your server's name during the initial setup process. At that time, our goal was to simply get an Ubuntu Server installation set up for working through the examples in this book. At this point, you may consider changing the hostname of your server.
When we utilize OpenSSH to remotely manage our servers (as we’ll do later on in this chapter), the hostname is shown on the command line. That can be very confusing if all servers have the same name. More importantly, the hostname of a server gives it an identity. When it comes to real production deployments of Ubuntu Server, each individual server should have its own designated purpose, and be named accordingly. Often, organizations will have their own naming scheme. Perhaps web servers in a company are named similar to webserver-01, or with a fully qualified domain name, such as webserver-01...