I need to receive email notifications if file & folder permissions are modified by a user on one of my Ubuntu servers.
Is such a thing possible? If so how is it accomplished?
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Look into inotify. http://man7.org/linux/man-pages/man7/inotify.7.html You can google for some simple examples that will meet your requirements. You will want to link notifications to a mail system. http://www.postfix.org/postfix-manuals.html. This is a well-established system that you will find is well documented. And of course you will find more detailed support here once you have questions. – Stephen Boston Apr 27 '19 at 03:56