I had a video project I was working on, and was going to VNC into my Mac from work so I could render the DVD while out. I connected to it, but then VNC crapped out. It's not responding anymore, but I can still SSH to it. Everything is saved, so I'd like to reboot it remotely. When I SSH to it, I login as my admin (only actually) account. I execute 'shutdown -r now' but it gives me a message that I'm not a super-user. I then executed 'su' and supply my password, and it replies with su: Sorry. Is there another way to reboot it remotely, or restart the VNC service?