Finding the preferred application for a given file extension via unix shell commands

Question

this may not be strictly about programming, but if I find no ready-made solution it may become a programming task: On UNIX, what is a command-line method f

Answer 1

The answer differs depending on the desktop environment your using. Since you mentioned Okular, I'm going to assume you're using KDE. So try:

kde-open 

For GNOME, there is the equivalent:

gnome-open