appstream-index software package provides Application index generator, 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 appstream-index
appstream-index is installed in your system.
Make ensure the appstream-index package were installed using the commands given below,
$ sudo dpkg-query -l | grep appstream-index *
You will get with appstream-index package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Administration Utilities |
| Package | appstream-index |
| Version | 0.4.0-1 |
| Description | Application index generator |
| Sub Section | Admin |