Systemd

Systemd is a system and service manager for Linux providing parallel startup, service supervision, and system management.

What is Systemd?

Systemd is an init system and service manager for Linux that provides aggressive parallelization, socket and D-Bus activation, and on-demand daemon starting.

Systemd concepts

Units (service, socket, timer), Targets (runlevels), Dependencies, Journal (logging).

Common misconceptions

"Systemd is just init" — Much broader scope
"Systemd is universally loved" — Controversial but standard
"SysVinit scripts still work" — Compatibility varies