From 6cc9d8c72a56563b6d1a12b8b441dfa9dde345e9 Mon Sep 17 00:00:00 2001
From: Julien Dessaux
Date: Tue, 28 Apr 2020 17:29:52 +0200
Subject: Long overdue first commit with content

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 content/en/blog/commands/rrdtool.md | 21 +++++++++++++++++++++
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+---
+title: "rrdtool"
+linkTitle: "rrdtool"
+date: 2018-09-25
+description: >
+  rrdtool
+---
+
+## Graph manually
+
+{{< highlight sh >}}
+for i in `ls`; do
+    rrdtool graph $i.png -w 1024 -h 768 -a PNG --slope-mode --font DEFAULT:7: \
+      --start -3days --end now DEF:in=$i:netin:MAX DEF:out=$i:netout:MAX \
+      LINE1:in#0000FF:"in" LINE1:out#00FF00:"out"
+done
+{{< /highlight >}}
+
+## References
+
+- https://calomel.org/rrdtool.html
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