On Mon, 14 Nov 2022, Ulrich Windl wrote: [...] > Wow! never heard of that option. Is that a kind of target, or what is the mechanism? > Which of the 196 (man -k systemd | wc -l) systemd-related manual pages would describe it? ;-) A small correction to my previous email: this particular boot parameter is actually documented in kernel-command-line(7). It's not implemented by PID 1 itself. And it should actually be "systemd.debug_shell" with an underscore, not a hyphen.