Rebuilding the whole machine, in the right order
What no backup contains, the order a machine goes back together in, and why reversing it costs you a second restore.
26 minutesTechnical content last reviewed on 3 Aug 2026
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What this lesson builds
- Backing up so that a restore actually works
- Keeping secrets out of the places that publish them
End of the course
Firewall and hardening
Close what has no business being open, slow automated attacks down, and check regularly what the server exposes — without locking yourself out.
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