Nyanner is free software, written on Java and published under the WTFPL. You can access the source code in the project page below.
Nyanner for GNU/Linux requires the Java Runtime Environment make sure you have it installed, unzip the files, and run nyanner.jar.
If you are getting "Error: Could not find or load main class" Try installing OpenJFX as some distributions don't include it with the JRE.
You can download the DB file needed to run Nyanner 0.6 (Beta) at: Sqlite file: Download Updated! 29/06/2017