postgis software package provides Geographic objects support for PostgreSQL, 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 postgis
postgis is installed in your system.
Make ensure the postgis package were installed using the commands given below,
$ sudo dpkg-query -l | grep postgis *
You will get with postgis package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Miscellaneous |
| Package | postgis |
| Version | 2.1.2+dfsg-2ubuntu0.1 [amd64, |
| Description | Geographic objects support for PostgreSQL |
| Sub Section | misc |