Just placing this as a placeholder for myself, but I’m sure others need this information on the fly sometimes.
Usage: shutdown [/i | /l | /s | /r | /a | /p | /h | /e] [/f]
[/m \\computer][/t xxx][/d [p:]xx:yy [/c "comment"]]
No args Display help. This is the same as typing /?
/? Display help. This is the same as not typing any options
/i Display the graphical user interface (GUI).
This must be the first option
/l Log off. This cannot be used with /m or /d option
/s Shutdown the computer
/r Shutdown and restart the computer
/a Abort a system shutdown.
This can only be used during the time-out period
/p Turn off the local computer with no time-out or warning.
This can only be used with /d option
/h Hibernate the local computer.
This can only be used with the /f option
/e Document the reason for an unexpected shutdown of a computer
/m \\computer Specify the target computer
/t xxx Set time-out period before shutdown to xxx seconds.
The valid range is 0-600, with a default of 30
/c "comment" Comment on the reason for the restart or shutdown.
Maximum of 127 characters allowed
/f Force running applications to close without forewarning users
/d [p:]xx:yy Provide the reason for the restart or shutdown
p indicates that the restart or shutdown is planned
xx is the major reason number (positive integer less than 256)
yy is the minor reason number (positive integer less than 65536)