Install nautilus-compare by entering the following commands in the terminal:
sudo apt update sudo apt install nautilus-compare
Description:
Context menu comparison extension for Nautilus file manager
Simple context menu file comparison extension for Nautilus 3 and above, inspired by the discontinued 'diff-ext' extension. By default it uses 'meld' to do the comparison and provides "Compare", "Compare to ~/foo/bar" and "Compare Later" in Nautilus context menu. Using the configurator tool you can choose your favourite compare tool for one-on-one, three-way and multi-compare situations.
Homepage: https://launchpad.net/nautilus-compare
Version: 0.0.4+po1-1
Section: universe/gnome