diffutils software package provides File comparison utilities, 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 diffutils
diffutils is installed in your system.
Make ensure the diffutils package were installed using the commands given below,
$ sudo dpkg-query -l | grep diffutils *
You will get with diffutils package name, version, architecture and description in a table
| Distro | Ubuntu 16 10 yakkety yak |
| Section | Utilities |
| Package | diffutils |
| Version | 1:3.3-3 |
| Description | File comparison utilities |
| Sub Section | Utils |