netpbm software package provides Graphics conversion tools between image formats, 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 netpbm
netpbm is installed in your system.
Make ensure the netpbm package were installed using the commands given below,
$ sudo dpkg-query -l | grep netpbm *
You will get with netpbm package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Graphics |
| Package | netpbm |
| Version | 2:10.0-15ubuntu2 |
| Description | Graphics conversion tools between image formats |
| Sub Section | Graphics |