I have a new UPS with Net Agent II SNMP.

The UPS monitoring software that comes bundled with the package is called Clientmate. I've installed the windows version on a WinXP machine and it initiates a shutdown fine when the AC power is cut. I've installed the Linux version on a Centos 5 system and it can see the SNMP enabled UPS, it senses when the AC power is cut and initiates the shutdown correctly after the predefined delay period, but when it issues the /sbin/halt command nothing happens?

If I have a shell open I see a countdown until shutdown happening, when it gets to 0 it reads:

# Preshutdown processes all done! (time/date stamp)
# Shutdown NOW! /sbin/halt (time/date stamp)

...and then it just sits there not shutting down?

If I issue /sbin/halt manually from the command line it shuts down immediately?

I tried changing the path to /sbin/halt in the clientmate config file to /usr/sbin/halt but it didnt appear to effect anything.

Any suggestions as to why /sbin/halt is not working when called by the Clientmate software. I am thinking possibly the Clientmate may not be running under root but I am not sure how to check? I installed it using root user and all files are owned by root?

Clientmate runs as a daemon, you have to give it 'sudo' permissions to execute '/sbin/halt'.

So far as I know, it is relatively easy to setup, do a search here on giving users specific sudo permissions, you'll turn up a pile of things!

Cheers, I got it working using sudo as per your advice. I first tried just allowing "deamon" group to execute /etc/halt but it didnt work, so I allowed "users" and it now works but I'd prefer to lock it down a bit better I just dont what specific group or user the Clientmate stuff runs under?

I'll try and dig a little deeper.