ldm-server software package provides server components for LTSP display manager, 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 ldm-server
ldm-server is installed in your system.
Make ensure the ldm-server package were installed using the commands given below,
$ sudo dpkg-query -l | grep ldm-server *
You will get with ldm-server package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Miscellaneous |
| Package | ldm-server |
| Version | 2:2.2.13-1 |
| Description | server components for LTSP display manager |
| Sub Section | misc |