appstream software package provides Software component index, you can install in your Ubuntu 16.04 LTS (Xenial Xerus) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install appstream
appstream is installed in your system.
Make ensure the appstream package were installed using the commands given below,
$ sudo dpkg-query -l | grep appstream *
You will get with appstream package name, version, architecture and description in a table
| Distro | Ubuntu 16 04 lts xenial xerus |
| Section | Administration Utilities |
| Package | appstream |
| Version | 0.9.4-1 |
| Description | Software component index |
| Sub Section | admin |