RHEL Linux Red Hat System Administration 2025 – 400 Free Practice Questions to Pass the Exam

To reboot a RHEL system immediately, using the command "reboot" is a straightforward and effective choice. This command initiates a system restart without any additional parameters or options, making it a quick way to bring down the current operating system and start it up again.

"Reboot" directly communicates to the system's kernel to terminate all running processes, unmount file systems, and perform a clean restart. This simplicity ensures that it typically runs immediately and does not require any additional configuration. It is also commonly recognized and understood by users familiar with Unix and Linux systems.

Other commands among the options serve similar purposes but may involve different approaches or provide additional features. For instance, "shutdown now" is designed to shut down the system immediately, but its primary purpose is to power off rather than reboot. "init 6" changes the runlevel to 6, which is the runlevel for reboots in traditional SysVinit systems. While it ultimately results in a reboot, it is less direct than simply using "reboot." "systemctl reboot" is another valid method in systems using systemd, which will also perform a reboot, but it may introduce complexity concerning managing dependencies or service shutdown procedures.

While these other commands can achieve a reboot