With xdg-open I would like to open all image files with shotwell, even risking that it may complain about files types it does not know about.

I added

[Default Applications]

to ~/.config/mimeapps.list and could now go on to add more lines for all image formats I could think of. But this can be tedious.

I tried already to use


but this does not work. Is there a way to define a default for all image files without explicitly listing them all?

1 Answer 1


I also naively assumed globbing would work but after a great deal of searching have found no evidence that it or a similar mechanism is available for catching all files of a certain type (e.g. image) rather than subtype (image/png).

Fortunately, the Internet Assigned Numbers Authority (IANA) maintains a list of standard MIME types which you can use to fill your mimeapps.list. Personally, I found it convenient to just copy the relevant lines from my distribution's default list (which I found at /usr/share/applications/mimeinfo.cache) and change the desktop entries I wanted to.

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