On 24/07/2018 19:46, mythtv at howorth.org.uk wrote: > systemd[1]: /usr/lib/systemd/system/mythbackend.service:11: Invalid > user/group name or numeric ID: Productivity/Multimedia/Video/Players Oh yes, I forgot that. I had to edit /usr/lib/systemd/system/mythbackend.service and put the correct values of user and group.