Install meld by entering the following commands in the terminal:
sudo apt update sudo apt install meld
Description:
graphical tool to diff and merge files
Meld is a graphical diff viewer and merge application for the GNOME desktop. It supports 2 and 3-file diffs, recursive directory diffs, diffing of directories under version control (Bazaar, Codeville, CVS, Darcs, Fossil SCM, Git, Mercurial, Monotone, Subversion), as well as the ability to manually and automatically merge file differences.
Homepage: http://meldmerge.org
Version: 3.18.0-6
Section: universe/gnome