apbs software package provides Adaptive Poisson Boltzmann Solver, you can install in your Ubuntu 16.04 LTS (Xenial Xerus) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install apbs
apbs is installed in your system.
Make ensure the apbs package were installed using the commands given below,
$ sudo dpkg-query -l | grep apbs *
You will get with apbs package name, version, architecture and description in a table
| Distro | Ubuntu 16 04 lts xenial xerus |
| Section | Science |
| Package | apbs |
| Version | 1.4-1 |
| Description | Adaptive Poisson Boltzmann Solver |
| Sub Section | Science |