Resource
The Linux boot process, step by step
From power-on to login prompt, and why every stage matters in security work.
In preparation
A stage-by-stage walkthrough of how a Linux system starts, written for security learners rather than sysadmins — because persistence, rootkits and forensic timelines all live in this sequence.
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What this page will cover
- BIOS and UEFI, and what Secure Boot actually verifies
- GRUB, kernel selection and boot parameters
- The kernel handover and what initramfs is for
- systemd targets, units and the service start order
- Where attackers establish persistence, and how to spot it