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+====== pnp4nagios extracting graphs ======
+Bash script to extract graphs for previous month
+<code bash>
+#!/bin/bash
+#
+WDIR=/path/to/script
+OUTDIR=$WDIR/output/monthly_graphs
+mkdir -p $OUTDIR
+INPFILE=$WDIR/month_graphs.txt
+GRZIP=$WDIR/month_graphs.zip
+#
+# 1st day of last month
+stime=$(date -d "`date +%Y%m01` -1 month" +%s)
+# 1st day of this month
+etime=$(date -d "`date +%Y%m01`" +%s)
+#
+while read HN DB; do
+  GURL="http://localhost/pnp4nagios/image?host=${HN}&srv=${DB}&view=1&start=${stime}&end=${etime}"
+  PNGF="$OUTDIR/graph_${HN}_${DB}.png"
+  wget -O $PNGF -q --user=nagiosadmin --password=ENTERPASSWORD "$GURL"
+done < $INPFILE
+#
+rm $GRZIP
+zip -r -j -q $GRZIP $OUTDIR
+echo "" | mutt -a $GRZIP -s monthtly_graphs -- someone@example.org
+exit
+</code>
+File: month_graphs.txt
+<code>
+server1 CPU
+server1 Memory
+server2 CPU
+etc ...
+</code>