First of all, you access your server with PUTTY software.

All you have to do after access is to follow the commands.

To reboot the server: reboot

To shut down the server: shutdown

To shut down the server at a specific time (Example: 23.00): shutdown - 23:00

To shut down the server after a specified minute (Example: after 5 minutes): shutdown -h +5

To restart the server after the specified minute (Example: 10 minutes later): shutdown -r +10