groff software package provides GNU troff text-formatting system, 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 groff
groff is installed in your system.
Make ensure the groff package were installed using the commands given below,
$ sudo dpkg-query -l | grep groff *
You will get with groff package name, version, architecture and description in a table
| Distro | Ubuntu 12 04 lts precise pangolin |
| Section | Text Processing |
| Package | groff |
| Version | 1.21-7 |
| Description | GNU troff text-formatting system |
| Sub Section | Text |