systemd systemctl
man systemd.unit systemctl list-units
links
2daygeek.com/ SysVinit Vs systemd Cheatsheet
Remove service from systemd
LinuxQuestions.org LinuxQuestions.org > Forums > Linux Forums > Linux - General - [SOLVED] How to completely remove service from systemd using systemctl? OpenSUSE
superuser.com/ How to remove systemd services
serverfault.com/ How to remove missing systemd units?
The command you’re after is systemctl reset-failed