qgis-providers software package provides collection of data providers to QGIS, you can install in your Ubuntu 14.04 LTS (Trusty Tahr) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install qgis-providers
qgis-providers is installed in your system.
Make ensure the qgis-providers package were installed using the commands given below,
$ sudo dpkg-query -l | grep qgis-providers *
You will get with qgis-providers package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Science |
| Package | qgis-providers |
| Version | 2.0.1-2build2 |
| Description | collection of data providers to QGIS |
| Sub Section | Science |