I guess that don’t have a single day that I don’t need to compare codes or directories files… Linux have a great software to do that, it’s called meld. But sometimes is annoying to enter the software and then select the files/directory that you want to compare.
So quick way to do that is just to install nautilus-compare. Then, you will be able to compare just using nautilus 😉
sudo apt-get install meld nautilus-compare nautilus -q