man mrtg rrd Command

Man page for apt-get mrtg rrd Command

Man Page for mrtg rrd in Linux

Ubuntu Man Command : man mrtg rrd

Man Mrtg Rrd  Command

This tutorial shows the man page for man mrtg rrd in linux.

Open terminal with 'su' access and type the command as shown below:
man mrtg rrd

Result of the Command Execution shown below:

MRTG RRD(1)                                                                     mrtg                                                                     MRTG RRD(1)

mrtg rrd How to use RRDtool with MRTG

After using MRTG for some time you may find some limitations, mostly in the areas of performance and graphing flexibility. These are exactly the areas
addressed by RRDtool. To learn more about RRDtool check out its website on

When using mrtg with RRDtool you are replacing rateup with the RRDtool perl module To enable RRDtool support in mrtg you have to add the line

LogFormat: rrdtool

to your mrtg config file.

MRTG needs access to both the RRDtool perl module and to the rrdtool executable.

If these two items are not installed in locations where perl can find them on its own, then you can use the following two parameters to supply the appropri Äê
ate directories.

For the location of the rrdtool executable you put

PathAdd: /usr/local/rrdtool/bin/


PathAdd: c:

For the location of the perl module it would be:

LibAdd: /usr/local/rrdtool/lib/perl/


LibAdd: c:

When you have made this modification to the configuration file, several things will happen when you run mrtg again with the new config file:

1. mrtg will take all your old ".log" files and convert them to ".rrd" format. (The ".log" files don't get touched in the process, so if things don't work
out they are still there.)

2. mrtg will use rrdtool to update its databases. These will have a new format called rrd which is totally different than the native log format of the clas Äê
sic mrtg.

3. mrtg will not create any webpages of graphs anymore. It will only query the routers for traffic information and update its rrd databases.

The advantage of whole thing is that the mrtg will become much faster. Expect the runtime to drop to 20% of the previous value. (I would like to get some
feedback on this from folks with large installations.)

Mind you, though, while the logging process of RRDtool is very fast, you are also gaining some time by neither creating graphs nor updating webpages. The
idea behind this is that it is more efficient to create graphs and webpages on demand by using a cgi script.

At the moment there is no official script to do this, but two contributers have created such scripts:

One4All aka 14all.cgi
This was the first program to take over the webpage creation and graphing task. It has been developed by Rainer Bawidamann You
can find a copy on Rainers website: The program comes with its own documentation

routers.cgi, servers.cgi and generic.cgi
These are other cgi frontends to mrtg running with rrdtool. The main difference between this and 14all is that the web pages it creates are much more
stylish than the ones from mrtg. These tools have been written by Steve Shipway You can find a copy in http://www.steveship Äê The programs come with their own installation instructions.

mrtg rrd
The mrtg rrd script is a CGI/FastCGI application by Jan "Yenya" Kasprzak for displaying MRTG graphs from data in the RRDtool format. It is an intended
replacement for the 14all.cgi script. It can make your monitoring system faster because MRTG does not have to generate all the PNG files with graphs
every 5 minutes or so. Instead of this the graphs are generated on demand when the user wants to see them. rrd/

Paul C. Williamson has written a more in depth page on how the whole process works, including some performance figures. You can find his page on

Just as a side note: MRTG 3 will be based entirely on rrdtool technology. But don't wait for it ... get going now!

Tobias Oetiker <>

2.16.2 2008 05 16 MRTG RRD(1)-

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