Skip K-a-l-i. I'd go straight to release of Ubuntu 16.04 LTS, and then set up using these instructions:
https://hashcat.net/faq/wrongdriver
... and this version of the drivers directly from AMD:
"AMD GPUs on Linux require "RadeonOpenCompute (ROCm)" Software Platform (1.6.180 or later)"
https://hashcat.net/faq/wrongdriver
... and this version of the drivers directly from AMD:
"AMD GPUs on Linux require "RadeonOpenCompute (ROCm)" Software Platform (1.6.180 or later)"
~