pngnq software package provides tool for optimizing PNG (Portable Network Graphics) images, 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 pngnq
pngnq is installed in your system.
Make ensure the pngnq package were installed using the commands given below,
$ sudo dpkg-query -l | grep pngnq *
You will get with pngnq package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Graphics |
| Package | pngnq |
| Version | 1.0-2ubuntu1 |
| Description | tool for optimizing PNG (Portable Network Graphics) images |
| Sub Section | Graphics |