Linux: can I add command line scripts to the toolbar?

[bvz2000]

I am running xnviewMP under Linux. I would like to be able to send the paths of the currently selected images to a shell script (as arguments to the shell script). I've seen where I can add an exe file, but I cannot seem to find a way to add any other kind of script. Is something like this possible?

[xnview]

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