A thorough guide to systemd: unit file anatomy for Service, Timer, Socket, and Target units, dependency ordering, socket activation, journald log management, journalctl filtering, systemd-analyze for boot profiling, drop-in overrides, and user-mode systemd instances.
Systemd
-
systemd Deep Dive -
The Linux Boot Process: From Power Button to Login Prompt A thorough walkthrough of how Linux boots — from BIOS/UEFI firmware through the bootloader, kernel initialization, initramfs, systemd, and all the way to a running userspace. Includes debugging techniques for each stage.
-
Systemd: Managing Services and the Init System Understanding systemd, service management, and unit files on modern Linux systems.