This is the reverse question of How to reboot into Windows from Ubuntu?.
I'm using a PC with Windows/Ubuntu dual system. The PC is shared with others, so the default boot system in Grub is set to Windows, and the timeout is 1 second.
In order to switch the running Windows to Ubuntu, I have to reboot the windows and wait at the very short time of grub menu to choose the ubuntu entry. Many times I had missed or forgotten the chance and the system booted to windows again. (so I have to reboot again). Is there a way to directly reboot the windows to Ubuntu? Thanks!