-- reboot -- A command for rebooting the computer. Usage: reboot [-f] This command causes the system to reboot. If the (optional) '-f' parameter is supplied, then 'reboot' will attempt to ignore errors and reboot regardless. Use this flag with caution if filesystems do not appear to be unmounting correctly; you may need to back up unsaved data before rebooting. Options: -f : Force reboot and ignore errors.