-h Requests that the system be either halted or powered off after it has been brought down, with the choice as to which left up to the system. -P Requests that the system be powered off after it has been brought down.
Shutdown computer after X minutes
sudo shutdown -h 180
[email protected]:~ $ sudo shutdown -h 180 [sudo] password for boby: Broadcast message from [email protected] (/dev/pts/14) at 21:16 ... The system is going down for halt in 180 minutes! ^Cshutdown: Shutdown cancelled [email protected]:~ $
Shutdown On Specified Time
sudo shutdown -h 17:00
This will shutdown PC on 17:00 hours (5 PM).