Hello all. This may not be a Samba specific question, but I hope the response will be the same if it isn't. I've got two Red Hat Linux servers, one's a file server, the other a route/internet server. I've got an APC smart-UPS 1000 and xpowerchute software. The UPS sends a shutdown signal to the file server via a serial cable. You can *$buy$*! an Interface Expander to get two serial ports out of the UPS, but isn't good old Linux capable of much more than the usual buy-buy-buy. What I want to attempt to do is to get the server which is connected to the UPS, when receiving the poweroff command, to send the other server a poweroff/run-level 6 signal via the lan. The guidance so far is that it is possible some how, as long as the hub/switch is connected to the UPS. Does any one know anything further? Is writing a shell script on the right track? This is all I've come up with. Reguards, Trevor.