dssp software package provides protein secondary structure assignment based on 3D structure, you can install in your Debian 8 (Jessie) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install dssp
dssp is installed in your system.
Make ensure the dssp package were installed using the commands given below,
$ sudo dpkg-query -l | grep dssp *
You will get with dssp package name, version, architecture and description in a table
| Distro | Debian 8 jessie |
| Section | Science |
| Package | dssp |
| Version | 2.2.1-2+b1 [amd64, armel, armh |
| Description | protein secondary structure assignment based on 3D structure |
| Sub Section | Science |