Linux Administration Cookbook

See also

There's another method to making your own unit file changes, but it's messier. Effectively, you write a complete unit file, changing the options you want, and you place your new file in /etc/systemd/system/ before re-enabling the service. The reason this works is because /etc/systemd/system/ has a higher precedence than /usr/lib/systemd/system/ though you've now burdened yourself with management of the whole service definition, instead of just the bits you want to change.