How to force reboot from user login screen

If you wish to force a reboot, and the option to cleanly power down or reboot is not available, and a tap of the power button sends the device to standby, then hitting the reset switch, holding in the power button for 5 seconds, or removing power is the only option. It's a poor practice for admins to remove the ability for a user to power down cleanly, because the end result is that users tend to do a hard reboot out of necessity, potentially causing data loss or other issues.

One way to do it is a hard reboot or a hard reset by holding down the power button for 5 to 6 seconds or unplug the cable or the battery.

Just click the dropdown arrow attached to the shutdown button, and choose restart.