this is one I always forget. So I’ll write it down for myself There are 2 ways to unmount a device when it’s busy. 1. the clean way: # fuser -m /media/attached /media/attached/:        1249c ps auxw | grep 1249 bert      1249  0.2  0.3 1052124 30760 ?       Sl   Sep18   2:19 python /usr/bin/revelation revelation is what is keeping you away from unmounting [...]