fasttree software package provides phylogenetic trees from alignments of nucleotide or protein sequences, 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 fasttree
fasttree is installed in your system.
Make ensure the fasttree package were installed using the commands given below,
$ sudo dpkg-query -l | grep fasttree *
You will get with fasttree package name, version, architecture and description in a table
| Distro | Debian 8 jessie |
| Section | Science |
| Package | fasttree |
| Version | 2.1.7-2 |
| Description | phylogenetic trees from alignments of nucleotide or protein sequences |
| Sub Section | Science |