apt-file software package provides search for files within Debian packages (command-line interface), 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 apt-file
apt-file is installed in your system.
Make ensure the apt-file package were installed using the commands given below,
$ sudo dpkg-query -l | grep apt-file *
You will get with apt-file package name, version, architecture and description in a table
| Distro | Ubuntu 12 04 lts precise pangolin |
| Section | Administration Utilities |
| Package | apt-file |
| Version | 2.5.0ubuntu1 |
| Description | search for files within Debian packages (command-line interface) |
| Sub Section | Admin |