NirCmd is a small command line utility that allows you to do some useful Tasks without displaying any user interface. By running NirCmd with a simple command line option, you can write and delete values and keys in the Registry, write values into a INI file, dial to your internet account or connect to a VPN network, restart windows or shut down the computer, create shortcut to a file, change the created/modified date of a file, change your display settings, turn off your monitor, open the door of your CD-ROM drive, and more.

NirCmd can be found here.