Thanks for your post.

I installed the Perl script in the scripts directory for nemo running on Mint, and although the script showed up in the context menu, it didn't run (I added some code to write to a file as a test). A bash script in the same location and with the same user/group/permissions did run OK.

My thought was that there was an environment issue. To get the perl script to work I added a perl libraries path like this:

I don't know if this was an issue with Mint/nemo or with my installation of perl, but this may help someone else who has the same problem.

Now shrink works from the context menu - at least for images - I haven't tried any pdf's yet.

It was just what I had been looking for when preparing images to share with others, so much easier than opening an image manipulation program and manually having to edit and save a new file. Thanks again.