RHEL / Red Hat · easy · solved in-browser (no VM needed) · 3 tiered hints
Write /etc/sysconfig/network enabling networking and setting a fully-qualified static hostname: a NETWORKING=yes line and a HOSTNAME= line whose value is a fully-qualified domain name (it must contain at least one dot, e.g. web01.example.com). (Authored config, graded structurally — the engine isn't run here.)
▶ Start this challengeNobody has solved this one yet — be the first clear on the leaderboard.
Open the challenge and an in-page editor appears — write your answer and tmpfs.tech grades it server-side against the same checks a real box would run. No VM, no install, no signup needed to try.
Red Hat-family specifics: rpm, dnf, SELinux and packaging.
See all RHEL / Red Hat challenges →
Is it free? Yes — play as a guest, no signup required to start.
Do I need to install anything? No. Everything runs in your browser.
How is it graded? Automatically and deterministically — your work is checked against the exact rules the live box would apply.