Hello, I'm sorry to bother you again, I tried what you sent me. It gives me the following result: period=300 time=3600
end=`date +%s` gives =====> end=1309521104 end=$(( ( ${end} / ${period} ) * ${period} )) =====> after this operations it gives end=1309520880 time=$(( ( ${time} / ${period} ) * ${period} ))=====> time don't change after operations time=3600 start=$(( ${end} - ${time} ))=====> this operations gives the value of start start=1309517280 it shows ok, but when i run rrdtool fetch it does not accept the value 3600 rrdtool fetch $rrd AVERAGE -r $period -s $time =====> ERROR: start time: did you really mean month 3600? thank you very much.
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