You can force Emacs to make a file executable (respecting your umask settings) if Emacs considers it a script. To determine if it is a script, Emacs will look for the hash-bang notation in the file and treat it as a script if it finds it.
Add this to your init file and Emacs will then make the file executable if it is a script.
(add-hook 'after-save-hook
'executable-make-buffer-file-executable-if-script-p)Are you struggling with the basics? Have you mastered movement and editing yet? When you have read Mastering Emacs you will understand Emacs.
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