If you are French, the same command works to remove your freedom pack.

That’s just like your opinion, man!

Frag mal deine Großeltern. In deren Jugend hat ein Döner nur 2 Reichsmark gekostet.

My dog is neutered

I just debuged it like every other of my scripts that failed. Again, I didn't need any special knowledge of the init process, just general (and for me: very limited) knowledge.

The answer to your other questions: I don't thing I ever did that.

I find everything so complicated with systemd.

SysV was just intuitive for me and my knowledge. There was just one directory with all the startup scripts in it. And they were run in their alphanumerical ordner. Just that simple. If I wanted to change the order in which the scripts started, I just had to rename the file. You don't want a script to run at all? Just remove it.

I assume, systemd has many advantages for a knowledged user. But for me, it still is just a hassle.