Command Needed for Hard Reboot of Router OS

We are doing the software upgrade and downgrade on Mikrotik Board via script. After upgrade and downgrade I want to hard reboot my router. I know only hard reboot button option. Is there any command which I can run using ssh which will behave just like hard reboot button functionality.

/system reboot?

This will only reboot the unit.

How is this different? What would you like to do instead?

I think he means such a kernel thing:

echo 1 > /proc/sys/kernel/sysrq
echo b > /proc/sysrq-trigger

what good would it to in a RouterOS situation?

You can buy a slave and call him to plug out the power when you need a hard reboot.