Searching the internet I found recommendations to use dist-upgrade. ISPconfig also tells me that there are updates available if upgrade says something held back until I run dist-upgrade. Also on the net i found recommendations to use apt instead of apt-get, at least I understood it so. i'm actually running Debian 10 on most of my servers and Debian 9 on some others. Maybe that is a silly question, but if not I would like an answer or link from the specialist here. Thanks, hope you are all doing well in that times.