giflib-tools software package provides library for GIF images (utilities), 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 giflib-tools
giflib-tools is installed in your system.
Make ensure the giflib-tools package were installed using the commands given below,
$ sudo dpkg-query -l | grep giflib-tools *
You will get with giflib-tools package name, version, architecture and description in a table
| Distro | Ubuntu 16 04 lts xenial xerus |
| Section | Utilities |
| Package | giflib-tools |
| Version | 5.1.2-0.2 |
| Description | library for GIF images (utilities) |
| Sub Section | Utils |