Install kompare by entering the following commands in the terminal:
sudo apt update sudo apt install kompare
Description:
file difference viewer
Kompare displays the differences between files. It can compare the contents of files or directories, as well as create, display, and merge patch files. . This package is part of the KDE Software Development Kit module.
Homepage: http://www.kde.org/
Version: 4:17.12.3-0ubuntu1
Section: universe/devel