On 3.11.2014 2:52, defkev wrote:
Hi,

i am looking for the monthly equivalent - if there is any - to the daily
"midnight" AT-TIME
>
but what if i want my graph to start at the 1st of the current month?
all i could come up with was something like this:
start=midnight 01.11
which will indeed start the graph at the 1st of November, but not very handy
as i have to modify the RPN for every concurrent month.

Hi,

I use the following way to draw a vertical line (VRULE) to midnight at my monthly graph.

month=`date +%-d` # Current day of month

if [ $month -eq 1 ]
then
daat=`date -d "" +%s` # If day of month number is 1 then current day is today
else
month=$(($month -1))
daat=`date -d "$month days ago 00:00:00" +%s` # Else get the first day of month's time at 00:00:00
fi

I have tested it today and it outputs Sat November 01 00:00 in epoch format for rrdtool in the variable daat. I'm sure there is a nicer way to compute this but it seems to work...

regards

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