1. Before you make the alteration to the GUI settings, run the following command in your shell of choice:

This command creates an empty file in your home directory named timestamp. We don't need to put anything in this file - the only important part is the modification time.

3. Now, return to your shell of choice and run the following command:

This command will return a list of files in the /etc/ directory that have been modified more recently than the file '~/timestamp', making it much easier than attempting to calculate the correct time by hand using the other time related switches for the find command.

''- Gregory Masseau''