What Are the Best PLC Learning Resources for Linux Users?

[Matrix_Engineering]

PLC Learning resources for Linux

My laptop is running linux (popOS 22.04LTS), but I really want to become proficient in PLC logic, mainly for the purpose of being more effective in reading other people's programs. What is the best resource for simulating/learning PLCs on linux for little to no cost? There are two things that really bug me; 1. Paywalls and 2. Windows-Only applications