RRDtool Graph Syntax
RRDtool Command:
/usr/bin/rrdtool graph - \
--imgformat=PNG \
--start='1531333226' \
--end='1531419626' \
--pango-markup  \
--title='Barometer' \
--vertical-label='Inches Hg' \
--slope-mode \
--base=1000 \
--height=250 \
--width=650 \
--y-grid='0.1:10' \
--tabwidth '30' \
--alt-autoscale \
--upper-limit='31.0' \
--lower-limit='29.0' \
--y-grid='0.1:10' \
COMMENT:"From 2018/07/11 14\:20\:26 To 2018/07/12 14\:20\:26\c" \
COMMENT:"  \n" \
--color BACK#F3F3F3 \
--color CANVAS#FDFDFD \
--color SHADEA#CBCBCB \
--color SHADEB#999999 \
--color FONT#000000 \
--color AXIS#2C4D43 \
--color ARROW#2C4D43 \
--color FRAME#2C4D43 \
--border 1 --font TITLE:11:'Arial' \
--font AXIS:8:'Arial' \
--font LEGEND:8:'Courier' \
--font UNIT:8:'Arial' \
--font WATERMARK:6:'Arial' \
--slope-mode \
--watermark 'Generated by Cacti®' \
DEF:a='/disk2/Weather/rrd/weather.rrd':'RP':AVERAGE \
LINE1:a#000000FF:'' 
RRDtool Says:
OK