What CertForged actually is
CertForged is a browser-based simulator for the Red Hat Certified System Administrator (RHCSA) exam. There's a real terminal, a real (simulated) filesystem, real (simulated) services and users, and immediate grading on every task. No VM. No installation.
What to do first
What's free vs. paid
The first two topics (File Operations and Text Files) are free for anyone with an account. To unlock the other 31 topics, practice mode, and timed exams, subscribe to Pro on the Pricing page.
Tip
Don't binge-read. Spend 30 minutes on one topic, do the mastery tasks, and let spaced repetition surface it again in a few days. You'll retain 5x more than reading 10 topics in a row.