== Debian 10 does not have the same ''su'' behavior as previous versions == => $PATH does not contain /sbin when using ''su'' command from user shell\\ [[https://unix.stackexchange.com/questions/460478/debian-su-and-su-path-differences|How to fix]]\\ == Admin graphical applications can fail to start since upgrade to debian 10 == Displayed message :\\ ''No protocol specified''\\ ''Error: cannot open display: :0.0''\\ [[https://bbs.archlinux.org/viewtopic.php?id=108695|How to fix]]\\ => use ''$ xhost +''