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When the reboot is initiated, all logged-in users and processes are notified that the system is going down, and no further logins are allowed. The system will be restarted immediately. To reboot your Linux system, simply type reboot or systemctl reboot: sudo systemctl reboot The commands must be run as root or user with sudo

In this article, we’ll explain how to use the systemctl and shutdown commands to reboot your Linux machine. The reboot and shutdown commands are aliases to systemctl and are available in the system for compatibility reasons. On most modern Linux distributions, the systemctl utility replaces most of the power management commands used in the older Linux distributions with sysvinit. If you’re running a headless Linux server, you need to know how to restart the system from the command line. A system reboot may also be required in other circumstances, e.g., when troubleshooting hardware issues, installing applications, and so on. When the kernel is updated, unless you’re using Livepatch or KernelCare, you need to reboot your Linux system.