gnustep-icons software package provides Several free icons for use with GNUstep and others, 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 gnustep-icons
gnustep-icons is installed in your system.
Make ensure the gnustep-icons package were installed using the commands given below,
$ sudo dpkg-query -l | grep gnustep-icons *
You will get with gnustep-icons package name, version, architecture and description in a table
| Distro | Ubuntu 16 04 lts xenial xerus |
| Section | X Window System software |
| Package | gnustep-icons |
| Version | 1.0-5 |
| Description | Several free icons for use with GNUstep and others |
| Sub Section | X253 |