A couple addons that can be used to run an action on another machine (for example Linux PC) with the selected file as argument.
Show a ignore file/dir menu item. When pressed call script.on.file.
Show a select menu item. When pressed call script.on.file.
Show a unselect menu item. When pressed call script.on.file.
The addon creates a HTTP post request to a URL depending on the arguments given when the addon is called. This can be used to call a script on another host with file/directory information provided by one of the context.* addons.
I used other plugins to get inspired. For example the Kodi Hello World plugin/script and also Trakt - Contextmenu. I bluntly copy/pasted parts of the plugins to create this one.