fdupes software package provides identifies duplicate files within given directories, you can install in your Ubuntu 12.04 LTS (Precise Pangolin) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install fdupes
fdupes is installed in your system.
Make ensure the fdupes package were installed using the commands given below,
$ sudo dpkg-query -l | grep fdupes *
You will get with fdupes package name, version, architecture and description in a table
| Distro | Ubuntu 12 04 lts precise pangolin |
| Section | Utilities |
| Package | fdupes |
| Version | 1.50-PR2-3 |
| Description | identifies duplicate files within given directories |
| Sub Section | Utils |