fldiff software package provides A graphical diff program, you can install in your Debian 7 (Wheezy) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install fldiff
fldiff is installed in your system.
Make ensure the fldiff package were installed using the commands given below,
$ sudo dpkg-query -l | grep fldiff *
You will get with fldiff package name, version, architecture and description in a table
| Distro | Debian 7 wheezy |
| Section | Text Processing |
| Package | fldiff |
| Version | 1.1+0-2 |
| Description | A graphical diff program |
| Sub Section | text |