Install imediff2 by entering the following commands in the terminal:
sudo apt update sudo apt install imediff2
Description:
interactive full screen 2-way merge tool
Imediff2 lets you merge two (slightly different) files interactively with a user friendly full screen interface on a text terminal. In other words, it is an ncurses based replacement for sdiff. . The program shows the differences of given files (in color if the terminal supports them), lets you scroll up and down and toggle changes between the old and new versions of the differing hunks one by one. . Unlike split screen based merge tools, it shows only one, partially merged, version of the file at a time, making it more "WYSIWYG", perhaps more intuitive for beginners and most importantly, suitable for narrow terminals.
Homepage: http://alioth.debian.org/projects/imediff2/
Version: 1.1.2-3
Section: universe/text