Writing a basic unit file

In this section, we're going to put together a unit file of our own. We're also going to choose a location to save it and we're going to reboot our system to check if it works.

How to do it...

We're going to again use Python's built-in web server, starting an instance using a small unit file.

First, create the directory in which we're going to store our unit file:

$ sudo mkdir -p /usr/local/lib/systemd/system

Next, we're going to echo the following into a file called pythonWebServer.service:

$ sudo tee /usr/local/lib/systemd/system/pythonWebServer.service << HERE
[Unit]
Description=Python Web Server Example

[Service]
ExecStart=/usr/bin/python2.7 -m SimpleHTTPServer...