Please excuse me if this has been asked many times before. I couldn't find the answer here or anywhere else Google lead me. I like Rich Text Format files. I don't wish to discuss or debate my preferences, okay?
What I would like to learn is how to make all .rtf files on my Ubuntu 16.04 installation cease being executable now and forever until the end of time!
I cannot remove the check from the 'run as executable' box under Properties of each individual file. It just magically resets itself. I have moved all of the .rtf files into a single directory, opened the directory in Terminal and tried using the chmod command half a dozen different ways to remove the files executable capabilities, but the files executable capabilities remain intact.
If the executable function of rich text format files absolutely and unequivocally cannot be remove, then please tell me. Otherwise there must be a Ubuntu zen master (or mistress) who can show me the way.