command line - How To Make .RTF Files Non-Executable in Ubuntu 16.04 - Ask Ubuntu

please excuse me if has been asked many times before. couldn't find answer here or anywhere else google lead me. rich text format files. i don't wish discuss or debate preferences, okay?

what like learn how make .rtf files on ubuntu 16.04 installation cease being executable , forever until end of time!

i cannot remove check 'run executable' box under properties of each individual file. magically resets itself. have moved of .rtf files single directory, opened directory in terminal , tried using chmod command half dozen different ways remove files executable capabilities, files executable capabilities remain intact.

if executable function of rich text format files absolutely , unequivocally cannot remove, please tell me. otherwise there must ubuntu zen master (or mistress) can show me way.

open nautilus.

navigate 1 of rtf files in question , left single click on it. not double click, single left click give focus.

hover mouse on top menu bar make "file, edit..." menu appear use:

1. click edit drop-down menu
2. click preferences option
3. click behavior tab
4. observe radio option buttons under executable text files
5. check radio button view executable text files when opened

note though when , double click on bash script file opened default text editor selected instead of being executed.