Sometimes it might be necesary for whatever reason to shutdown your server at a given time. While it is possible to down the server with a NCF from cron, the shutdown doesn't proceeed if there are files open. There are some NLM tools which can do a forced shutdown, but even then the server remains powered on. So I wrote ATXOFF.NLM, a small NLM which is able to switch off the server after a (forced) shutdown with modern hardware. The server hardware must support APM 1.2, which is true with mainboards that use ATX-based power supplies.
ATXOFF.NLM is tested with NetWare 3.x to 6.x; it's been available for two years with more than 1100 downloads, and no one has ever replied that it doesn't work or that it abends.
Sometimes other options are needed: reset, restart, or on 3.x/4.x - exit, for this I have written XDOWN.NLM which provides these functions in addition to atxoff. The restart function does not work with NetWare 3.x.
The tools can be downloaded from this location:http://www.gknw.de/atxoff.html
If your NIC supports WakeOnLan then it's also possible to power on the server via a network with a 'magic packet'. If you want to do it from another server with cron then take a look at my tool WOL:http://www.gknw.de/wol.html
This tool contains two utilities: ATXOFF.NLM and XDOWN.NLM.