I am using NUT to shutdown the ups powering my CentOS 6 server but it has a 30 second delay when executing the shutdown.
When I run
upsc
I can see that the 30 seconds is controlled by the variable
ups.delay.shutdown: 30
However when I try to change it using
upsrw -u upsmon -p upsmon -s ups.delay.shutdown=0 mecer
Then I get the following error
ERR READONLY
Why is this? If removing those 30 seconds is not possible then is it possible to just make the ups power off after 10min?