Anatomy of the Linux boot process — from kernel initialization to systemd
Summary
This article explains the Linux boot sequence from firmware initialization through kernel startup and systemd handoff. It compares BIOS and UEFI, then shows how GRUB loads the kernel and initramfs. It also walks through early userspace, PID 1, and the transition from SysVinit to systemd. The piece closes by describing systemd targets and how boot parameters influence startup behavior.
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