libssm0 software package provides macromolecular superposition library, 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 libssm0
libssm0 is installed in your system.
Make ensure the libssm0 package were installed using the commands given below,
$ sudo dpkg-query -l | grep libssm0 *
You will get with libssm0 package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Libraries |
| Package | libssm0 |
| Version | 1.1-0ubuntu1 |
| Description | macromolecular superposition library |
| Sub Section | libs |