https://learn.netanixctf.xyz/ 2026-05-19 weekly 1.0 https://learn.netanixctf.xyz/og-learn.jpg Netanix Learn — 85 free Linux shell challenges in your browser Practice ls, grep, find, sed, awk, pipes, regex and hashing — no install, no signup. https://learn.netanixctf.xyz/logo.svg Netanix Learn logo https://netanixctf.com/ 2026-05-19 weekly 0.85 https://netanixctf.xyz/ 2026-05-19 weekly 0.85 https://quiz.netanixctf.xyz/ 2026-05-19 weekly 0.7