aprsdigi software package provides digipeater for APRS, 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 aprsdigi
aprsdigi is installed in your system.
Make ensure the aprsdigi package were installed using the commands given below,
$ sudo dpkg-query -l | grep aprsdigi *
You will get with aprsdigi package name, version, architecture and description in a table
| Distro | Ubuntu 16 04 lts xenial xerus |
| Section | Ham Radio |
| Package | aprsdigi |
| Version | 3.10.0-2 |
| Description | digipeater for APRS |
| Sub Section | Hamradio |