lubuntu-artwork software package provides artwork for Lubuntu, 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 lubuntu-artwork
lubuntu-artwork is installed in your system.
Make ensure the lubuntu-artwork package were installed using the commands given below,
$ sudo dpkg-query -l | grep lubuntu-artwork *
You will get with lubuntu-artwork package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | X Window System software |
| Package | lubuntu-artwork |
| Version | 0.45 |
| Description | artwork for Lubuntu |
| Sub Section | x11 |