systemd - ArchWiki - Arch Linux
https://wiki.archlinux.org/title/Systemdsystemd. systemd is a suite of basic building blocks for a Linux system. It provides a system and service manager that runs as PID 1 and starts the rest of the system. systemd provides aggressive parallelization capabilities, uses socket and D-Bus activation for starting services, offers on-demand starting of daemons, keeps track of processes ...