=head2 More reading
-If you have difficulties with the way I try to explain them please read
+If you have difficulties with the way I try to explain it please read
Steve Rader's L<rpntutorial>. It may help you understand how this all works.
=head1 What are CDEFs ?
=head2 Degrees Celcius vs. Degrees Fahrenheit
- rrdtool graph demo.gif --title="Demo Graph" \
+ rrdtool graph demo.png --title="Demo Graph" \
DEF:cel=demo.rrd:exhaust:AVERAGE \
CDEF:far=cel,32,-,0.55555,* \
LINE2:cel#00a000:"D. Celsius" \
=head2 Changing unknown into zero
- rrdtool graph demo.gif --title="Demo Graph" \
+ rrdtool graph demo.png --title="Demo Graph" \
DEF:idat1=interface1.rrd:ds0:AVERAGE \
DEF:idat2=interface2.rrd:ds0:AVERAGE \
DEF:odat1=interface1.rrd:ds1:AVERAGE \