When you install Raspbian Stretch as the operating system for your Raspberry Pi, the default hostname is raspberrypi.
Since a Raspberry Pi is one of the things that programmers buy, we could deploy several at home.
When you have several Raspberry Pis deployed in your house, you may want them to be identified by hostnames.
So how can we change the hostname of our Raspberry Pi running Raspbian Stretch? This post shows how you can change the hostname of your Raspberry Pi via
raspi-config in Raspbian Stretch.