-i Show the graphical user interface of shutdown window
-l To log off from the machine. Make sure that you are not using -l switch with -m switch
-s Shutdown the desired computer
-r Shutdown and restart the computer
-a Abort a system shutdown
-m -m\machine name is used for to shutdown/restart/abort remote computer
-f Forces running application to close without warning
-t -t xx set timeout for shutdown command to xx seconds
-c -c"comment" to add shutdown comment, you can add up to max 127 characters