duff software package provides Duplicate file finder, you can install in your Ubuntu 16.10 (Yakkety Yak) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install duff
duff is installed in your system.
Make ensure the duff package were installed using the commands given below,
$ sudo dpkg-query -l | grep duff *
You will get with duff package name, version, architecture and description in a table
| Distro | Ubuntu 16 10 yakkety yak |
| Section | Utilities |
| Package | duff |
| Version | 0.5.2-1.1 |
| Description | Duplicate file finder |
| Sub Section | Utils |