Shutdown system using command line

Start --> Run -->Typeshutdown /s
It dispalys a countdown time of 30 secs to one min.

shutdown /s /f -->forcefully shutdown system
shutdown /s /f /t xx to shut down the system forcefully in XX secs
XX--> 00,01......

To abort shutdown --> shutdown /a
To restart system --> shutdown /r
To hibernate --> shutdown /h
To log off --> shutdown /l