Adapted from http://en.proft.me/media/linux/collectd_rrdtool.txt.

rrdtool-collectd-graphs

#!/usr/bin/env bash

######
# CPU
######

if [ $# -lt 2 ]
  then
    echo "Missing arguments"
    echo "Usage:"
    echo "rrdtool-collectd-graphs.sh <save_dir> <rrd_dir>"
    exit 1
fi

rrdtool_cmd=/usr/bin/rrdtool
save_dir=$1/
rrd_dir=$2/

if [ ! -d $save_dir ]
  then
    mkdir -p $save_dir
fi

$rrdtool_cmd graph "${save_dir}cpu_day.png" \
-e now \
-s 'end - 24 hours' \
-S 60 \
--title 'CPU usage (Day)' \
--vertical-label 'Percents' \
--imgformat PNG \
--slope-mode   \
--lower-limit 0 \
--upper-limit 100 \
--rigid \
-E \
-i \
--color SHADEA#FFFFFF \
--color SHADEB#FFFFFF \
--color BACK#CCCCCC \
-w 600 \
-h 150 \
--interlaced \
DEF:a="${rrd_dir}cpu-0/cpu-idle.rrd:value:MAX" \
DEF:b="${rrd_dir}cpu-0/cpu-system.rrd:value:MAX" \
DEF:c="${rrd_dir}cpu-0/cpu-user.rrd:value:MAX" \
LINE2:b#2cc320: \
AREA:b#54eb48:System \
LINE2:c#e7ad4a: \
AREA:c#ebd648:User

$rrdtool_cmd graph "${save_dir}cpu_week.png" \
-e now \
-s 'end - 7 days' \
-S 60 \
--title 'CPU usage (week)' \
--vertical-label 'Percents' \
--imgformat PNG \
--slope-mode   \
--lower-limit 0 \
--upper-limit 100 \
--rigid \
-E \
-i \
--color SHADEA#FFFFFF \
--color SHADEB#FFFFFF \
--color BACK#CCCCCC \
-w 600 \
-h 150 \
--interlaced \
DEF:a="${rrd_dir}cpu-0/cpu-idle.rrd:value:MAX" \
DEF:b="${rrd_dir}cpu-0/cpu-system.rrd:value:MAX" \
DEF:c="${rrd_dir}cpu-0/cpu-user.rrd:value:MAX" \
LINE2:b#2cc320: \
AREA:b#54eb48:System \
LINE2:c#e7ad4a: \
AREA:c#ebd648:User

#########
# Network
#########

$rrdtool_cmd graph "${save_dir}network_day.png" \
-e now \
-s 'end - 24 hours' \
-S 60 \
--title 'Traffic on network: eth (100Mb/s) (day)' \
--vertical-label 'Mbytes' \
--imgformat PNG \
--slope-mode   \
--lower-limit 0 \
--upper-limit 10000000 \
--rigid \
-E \
-i \
--color SHADEA#FFFFFF \
--color SHADEB#FFFFFF \
--color BACK#CCCCCC \
-w 600 \
-h 150 \
--interlaced \
DEF:a="${rrd_dir}interface-eth0/if_octets.rrd:tx:MAX" \
DEF:b="${rrd_dir}interface-eth0/if_octets.rrd:rx:MAX" \
DEF:c="${rrd_dir}interface-eth0/if_errors.rrd:tx:MAX" \
AREA:a#4169E1:Tx \
LINE2:b#2cc320: \
AREA:b#54eb48:Rx \
LINE1:c#FF0000:Errors

$rrdtool_cmd graph "${save_dir}network_week.png" \
-e now \
-s 'end - 7 days' \
-S 60 \
--title 'Traffic on network: eth (100Mb/s) (week)' \
--vertical-label 'Mbytes' \
--imgformat PNG \
--slope-mode   \
--lower-limit 0 \
--upper-limit 10000000 \
--rigid \
-E \
-i \
--color SHADEA#FFFFFF \
--color SHADEB#FFFFFF \
--color BACK#CCCCCC \
-w 600 \
-h 150 \
--interlaced \
DEF:a="${rrd_dir}interface-lo/if_octets.rrd:tx:MAX" \
DEF:b="${rrd_dir}interface-lo/if_octets.rrd:rx:MAX" \
DEF:c="${rrd_dir}interface-lo/if_errors.rrd:tx:MAX" \
AREA:a#4169E1:Tx \
LINE2:b#2cc320: \
AREA:b#54eb48:Rx \
LINE1:c#FF0000:Errors

#####
# RAM
#####

$rrdtool_cmd graph "${save_dir}ram_day.png" \
-e now \
-s 'end - 24 hours' \
-S 60 \
--title 'MEMORY usage (day)' \
--vertical-label 'Gbyte' \
--imgformat PNG \
--slope-mode \
--lower-limit 0 \
--upper-limit 3000000000 \
--rigid \
-E \
-i \
--color SHADEA#FFFFFF \
--color SHADEB#FFFFFF \
--color BACK#CCCCCC \
-w 600 \
-h 150 \
--interlaced \
DEF:a="${rrd_dir}memory/memory-buffered.rrd:value:MAX" \
DEF:b="${rrd_dir}memory/memory-cached.rrd:value:MAX" \
DEF:c="${rrd_dir}memory/memory-free.rrd:value:MAX" \
DEF:d="${rrd_dir}memory/memory-used.rrd:value:MAX" \
LINE1:a#6959CD:buffered \
AREA:b#00FF00:cache \
LINE2:c#006400: \
AREA:c#00CD66:free \
AREA:d#FF1493:used

$rrdtool_cmd graph "${save_dir}ram_week.png" \
-e now \
-s 'end - 7 days' \
-S 60 \
--title 'MEMORY usage (week)' \
--vertical-label 'Gbyte' \
--imgformat PNG \
--slope-mode \
--lower-limit 0 \
--upper-limit 3000000000 \
--rigid \
-E \
-i \
--color SHADEA#FFFFFF \
--color SHADEB#FFFFFF \
--color BACK#CCCCCC \
-w 600 \
-h 150 \
--interlaced \
DEF:a="${rrd_dir}memory/memory-buffered.rrd:value:MAX" \
DEF:b="${rrd_dir}memory/memory-cached.rrd:value:MAX" \
DEF:c="${rrd_dir}memory/memory-free.rrd:value:MAX" \
DEF:d="${rrd_dir}memory/memory-used.rrd:value:MAX" \
LINE1:a#6959CD:buffered \
AREA:b#00FF00:cache \
LINE2:c#006400: \
AREA:c#00CD66:free \
AREA:d#FF1493:used


#####
# DF
#####

$rrdtool_cmd graph "${save_dir}df_week.png" \
 -e now \
 -s 'end - 7 days' \
 -S 60 \
 --title "HDD USAGE: week" \
 --vertical-label "Bytes" \
 --imgformat PNG \
 --slope-mode   \
 --lower-limit 0 \
 --upper-limit 130000000000 \
 --rigid \
 -E \
 -i \
 --color SHADEA#FFFFFF \
 --color SHADEB#FFFFFF \
 --color BACK#CCCCCC \
 -w 600 \
 -h 150 \
 --interlaced \
 DEF:a="${rrd_dir}df-root/df_complex-free.rrd:value:MAX" \
 DEF:b="${rrd_dir}df-root/df_complex-reserved.rrd:value:MAX" \
 DEF:c="${rrd_dir}df-root/df_complex-used.rrd:value:MAX" \
LINE1:c#e7ad4a: \
 AREA:c#ebd648:Used \