RShutDown2 freeware has both a GUI and command line mode of operation. The syntax for the command line is:

RShutdown2 \[/command type\] \[:"message"\] \[/machine machine name\] \[/file file name\] /XXXX \[/Y\]

where:

                              \[/command type\]          can be any of the following:                                                        /help        for this help screen.                                                        /send        to send a popup message using the messenger service.                                                        /reboot      to reboot a machine and optionally send a warning.                                                        /shutdown    to shutdown the machine and optionally send a warning.                                                        /abort       to abort a shutdown (abort takes NO MESSAGE TEXT!).                                                                                        \[:"message"\]             "message text"                                \[/machine machine name\]  /machine JSI007 causes the action on JSI007.                              \[/file file name\]         causes the action on each computer name in <Drive:>\Folder\file name,                                                        one per line. A sample D:\Work\Computers.txt might contain:                                                        JSI006                                                        JSI007                                                        JSI008                                                        JSI009                              /XXXX                     XXXX is the number of seconds to display the shutdown message,                                                        before starting the shutdown.                              \[/Y\]                      Does NOT prompt for a response if you perform a local shutdown.