Sorry, but who isn't reading my comments ?
Assume that when I'm talking about headless server, admin lists, commands reporting "command" is not valid in this context, that my level of competence is higher than not knowing how to open the console.
My problem, maybe not clearly enough stated, is that on my dedicated computer, running a dedicated, headless server, commands like killall, spawn etc. are not being executed. Save etc works fine, the basic admin commands, but I needed to execute cheats to repair lost playtime due to a crash. I had to move the world files to my main machine and host it to get them to work.

Apologies, the lack of viable information and the rage from the server crashing for no apparent reason still lingers.