[collectd] Graphing rrd output of CPU plugin

[lanas]

Hello,

  Are there examples around for quickly graphing the out put of some
plugin modules (such as CPU) without having to use a web server (as
shown in first steps).  Simply producing a (some) graphic
file(s) from the files in cpu-0 directory for instance, to get a feel
about how it works and how collectd resulting data is worked with
rddtool. 

Thanks.