Systemd

Definitions

1. The init system and service manager that is PID 1 on most modern Linux distributions, responsible for bootstrapping user space, managing service lifecycles through unit files, handling dependencies and parallelized startup, and providing logging via journald.

   In plain English: The master program on most Linux systems that starts everything else up, keeps services running, and restarts them if they crash.

   Example: "Add a systemd unit file with Restart=on-failure so the service comes back automatically after a crash."

Related Terms

• Kernel Module
• Shell Script
• Subshell
• Epoll
• io_uring
• Cgroups
• Kernel Space
• OS Kernel