Well, thank you for the feedback. If you can tell me how to process "hwinfo" from within a udev - file, ok. Nevertheless: performing things with /etc/init.d/boot.local is an intended thing, otherwise the file would not be called "boot.local". In contrast, fillding with udev is - say, kind of difficult. I can only repeat my statement: why had things to be broken that used to work for decades (flawlessly ...) - I do not mind using systemd, but I expect systemd to provide simple capabilities and I cannot see a real good reason why a symlink created by udev has advantages compared to a symlink created "manually", the latter being the normal way a normal user would address such a problem (IMHO) Thank you for looking into this, take care Dieter Jurzitza