Re: [CentOS] OT: really dumb question about APC UPS

Jamie Lists wrote:

We have about 4 servers connected to an APC UPS. The UPS only has one UPS connection. So my question is, in a power outage how do i get all my servers to safely shutdown? Do i run a USB hub? Do i write a script on the one machine connected to turn off all the other machines? I'm confused.

what Michel said...

I want to add, a USB hub would not work... USB is a one master, many slave star bus. a PC is the master,, a device like your UPS is the slave. you can't connect two masters to the same USB*

*there are special USB to USB network cables, these are actually two slave ports with some network glue in the middle, this doesn't violate the rule above