Manage start-up with Linux that uses systemd

To list of services that systemd manages:

systemctl list-unit-files

To view only active entries:

systemctl list-units --type=service

To view the status of a specific service such as bluetooth:

systemctl status bluetooth

To disable an entry such as bluetooth:

sudo systemctl disable bluetooth

https://www.commandlinux.com/man-page/man1/systemctl.1.html