gsmc software package provides Smith Chart calculator for impedance matching, 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 gsmc
gsmc is installed in your system.
Make ensure the gsmc package were installed using the commands given below,
$ sudo dpkg-query -l | grep gsmc *
You will get with gsmc package name, version, architecture and description in a table
| Distro | Ubuntu 16 04 lts xenial xerus |
| Section | Ham Radio |
| Package | gsmc |
| Version | 1.1-3 |
| Description | Smith Chart calculator for impedance matching |
| Sub Section | Hamradio |