This is a very newbie question and I already asked before with no much help from the community (please pardon my existance). I want to open all my movies with smplayer2. When I choose "open file with" and then "use a custom command" I don't know which executable file points to smplayer2 (inside usr/bin directory). I run Linx mint debian xfce on my PC and I find no problems in finding whatever app I want to use to open whatever type of file via custom command.