Understanding the systemd configuration files

In this section, we'll look at the configuration files that control how the various components of systemd operate. If you want to follow along with your own VM, it won't much matter which distro you have because things will be mostly the same across all systemd-enabled distros. Okay—so now you're yelling at me, saying:

Mostly the same? Why, Donnie, you told us before that systemd is implemented consistently across all distros! What gives?

Well, it is consistent, in that the management and control commands are the same across all distros, but the systemd ecosystem includes several different components besides just the init system. These components are optional, and some Linux distros don't use all of them in a default configuration. Several of these components have configuration files in the /etc/systemd/ directory, as you can see here:

[donnie@localhost systemd]$ pwd
/etc/systemd
[donnie@localhost systemd...