libalgorithm-diff-perl software package provides module to find differences between files, you can install in your Ubuntu 14.04 LTS (Trusty Tahr) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install libalgorithm-diff-perl
libalgorithm-diff-perl is installed in your system.
Make ensure the libalgorithm-diff-perl package were installed using the commands given below,
$ sudo dpkg-query -l | grep libalgorithm-diff-perl *
You will get with libalgorithm-diff-perl package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Perl |
| Package | libalgorithm-diff-perl |
| Version | 1.19.02-3 |
| Description | module to find differences between files |
| Sub Section | Perl |