ldm-ubuntu-themes software package provides Themes for the LTSP Display Manager (transitional package), you can install in your Ubuntu 17.04 (Zesty Zapus) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install ldm-ubuntu-themes
ldm-ubuntu-themes is installed in your system.
Make ensure the ldm-ubuntu-themes package were installed using the commands given below,
$ sudo dpkg-query -l | grep ldm-ubuntu-themes *
You will get with ldm-ubuntu-themes package name, version, architecture and description in a table
| Distro | Ubuntu 17 04 zesty zapus |
| Section | Miscellaneous |
| Package | ldm-ubuntu-themes |
| Version | 2:2.0.47 |
| Description | Themes for the LTSP Display Manager (transitional package) |
| Sub Section | misc |