Systemd
Systemd is a system and service manager for Linux operating systems, designed as a replacement for traditional init systems like SysVinit. It provides a suite of tools for managing system startup, services, logging, and other system components, aiming to improve boot speed and system management efficiency. It integrates features such as service dependency management, socket activation, and centralized logging through journald.
Developers should learn Systemd because it is the default init system in most modern Linux distributions (e.g., Ubuntu, Fedora, Arch), making it essential for system administration, service deployment, and troubleshooting on Linux servers and desktops. It is particularly useful for managing daemons, automating service restarts, and handling system logs in production environments, ensuring reliable and efficient system operations.