>>> Michael Chapman <mike@xxxxxxxxxxxxxxxxx> schrieb am 14.11.2022 um 09:03 in Nachricht <2888d487-984a-b071-fa79-b18f662ef647@xxxxxxxxxxxxxxxxx>: > On Mon, 14 Nov 2022, Ulrich Windl wrote: > [...] >> > Boot with "systemd.debug‑shell" and use tty9 to investigate from the inside. >> >> 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? ;‑) > > All of systemd's kernel command‑line options are documented under "KERNEL > COMMAND LINE" in the systemd(1) man page. OK, that explains it: In my version of the manual page (systemd-249.12) that parameter does not exist. No surprise that I've never heard of it. However when reading systemd.directives(7), it says the command is explained in kernel-command-line(7). Looking there it refers to systemd-debug-generator(8). The latter refers to debug-shell.service. > > When you're in doubt where something might be documented, look at > systemd.directives(7). You'll find them there too. OK! Thanks! Regards, Ulrich