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Munin mod
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=========
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This mod provide player cap, number of connected players, current max_lag and uptime into munin.txt file once per 30 seconds.
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To enable this add:
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munin.enabled = true
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into your minetest.conf file
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Directory munin-plugin contains bash and ruby version of plugin for munin monitoring.
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Ruby one is more advanced as it can detect crashed minetest and put zero values into graph. Munin multigraph feature added. This feature is default off. When enabled second graph with MT uptime appears.
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Licence: WTFPL
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Structure of munin.txt
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player cap
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connected players
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max_lag
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uptime
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generation unixtimestamp
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Authors: Pitriss (munin mod) & Ritchie (munin.rb)
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local max_players = minetest.setting_get("max_users")
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munin_enabled = false
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if minetest.setting_getbool("munin.enabled") ~= nil then
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munin_enabled = minetest.setting_getbool("munin.enabled")
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end
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local last_time = os.time() + 5
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function munin_write(status, path)
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local file_desc = io.open(path, "w")
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file_desc:write(status.."\n")
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file_desc:close()
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end
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if munin_enabled then
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minetest.register_globalstep(function(dtime)
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if os.time() >= last_time then
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last_time = os.time() + 30
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if max_players == nil then
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local max_players = 100
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end
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local players = minetest.get_connected_players()
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local player_count = table.getn(players)
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local status = minetest.get_server_status()
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local status_splitted = {}
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for k, v in string.gmatch(status, "([_%w]+)=([%+%w%.]+)") do
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status_splitted[k] = v
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end
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local uptime = status_splitted.uptime
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local max_lag = status_splitted.max_lag
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local status_to_write = max_players.."\n"..player_count.."\n"..max_lag.."\n"..uptime.."\n"..tostring(os.time())
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local fpath = minetest.get_worldpath().."/munin.txt"
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munin_write(status_to_write, fpath)
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end
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end)
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end
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#!/usr/bin/ruby
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##################################
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# MT monitoring plugin for munin #
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# Author: Pitriss & Ritchie #
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# Licence: WTFPL #
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##################################
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# Some config
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datafile = ""
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worldname = ""
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# graph uptime of minetestserver? Multigraph feature will be used. http://munin-monitoring.org/wiki/MultigraphSampleOutput
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uptime = "no"
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# maximum value of maxlag. It prevents to make your graph unreadable when some huge peak appears.
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maxlag_maximum = 100
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# Maximal possible delay between value in munin.txt and server time in seconds
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# Formula is: servertime - (MTserverstartuptime + MTserveruptime)
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# MTserver should log every 30s
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max_delay = 60
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# colors
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color1 = "6DFF90"
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color2 = "FF0000"
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color3 = "0066B3"
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color4 = "00CC00"
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# Not needed to change anything below this comment
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if ARGV[0] == "config"
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if uptime == "yes"
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puts "multigraph minetest_players"
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end
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puts "graph_title Minetest server - #{worldname}"
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puts "graph_category minetest"
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puts "graph_info this graph shows information provided by munin mod"
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puts "graph_args --base 1000 -l 0"
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puts "graph_vlabel Players | Lag"
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puts "PlayerCap.label Player cap"
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puts "PlayerCap.draw AREA"
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puts "PlayerCap.colour #{color1}"
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puts "PlayersConnected.label Connected players"
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puts "PlayersConnected.draw AREA"
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puts "PlayersConnected.colour #{color2}"
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puts "MaxLag.label Maximal lag"
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puts "MaxLag.draw LINE"
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puts "MaxLag.colour #{color3}"
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if uptime == "yes"
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puts "multigraph minetest_uptime"
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puts "graph_title Minetest server - #{worldname}"
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puts "graph_category minetest"
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puts "graph_info this graph shows information provided by munin mod"
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puts "graph_args --base 1000 -l 0"
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puts "graph_vlabel Uptime in days"
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puts "Uptime.label Uptime"
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puts "Uptime.draw AREA"
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puts "Uptime.colour #{color4}"
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end
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elsif ARGV[0] == "debug"
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begin
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content = IO.readlines(datafile)
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offset = Time.now.to_i-content[4].to_i
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puts "Max delay is now: #{offset} second(s)"
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rescue Errno::ENOENT
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puts "ERROR: Misconfigured path to munin.txt or munin.txt doesn't exist."
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rescue
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puts "ERROR: Unknown error"
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end
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else
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content = IO.readlines(datafile)
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offset = Time.now.to_i-content[4].to_i
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if offset > max_delay
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if uptime == "yes"
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puts "multigraph minetest_players"
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end
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puts "PlayerCap.value 0"
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puts "PlayersConnected.value 0"
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puts "MaxLag.value 0"
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if uptime == "yes"
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puts "multigraph minetest_uptime"
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puts "Uptime.value 0"
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end
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else
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if uptime == "yes"
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puts "multigraph minetest_players"
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end
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puts "PlayerCap.value #{content[0]}"
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puts "PlayersConnected.value #{content[1]}"
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if content[2].to_f > maxlag_maximum then
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maxlag_value = maxlag_maximum.to_s
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else
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maxlag_value = content[2].to_s
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end
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puts "MaxLag.value #{maxlag_value}"
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if uptime == "yes"
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uptime_mt = content[3].to_f
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uptime_mt_day = uptime_mt / 86400
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puts "multigraph minetest_uptime"
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puts "Uptime.value #{uptime_mt_day}"
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end
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end
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end
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#!/bin/bash
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##################################
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# MT monitoring plugin for munin #
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# Author: Pitriss & Ritchie #
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# Licence: WTFPL #
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##################################
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# Path to munin.txt
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WORLDFILE="/home/axinite/.minetest/worlds/axinite/munin.txt"
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# Name of world displayed in graph title
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WORLDNAME="Axinite"
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if [ "$1" = "config" ] ; then
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echo "graph_title Minetest server - $WORLDNAME"
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echo "graph_category minetest"
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echo "graph_info this graph shows information provided by munin mod"
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echo 'graph_args --base 1000 -l 0 '
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echo "PlayerCap.label Player cap"
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echo "PlayerCap.draw AREA"
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echo "PlayerCap.colour 6DFF90"
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echo "PlayersConnected.label Connected players"
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echo "PlayersConnected.draw AREA"
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echo "PlayersConnected.colour FF0000"
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echo "MaxLag.label Maximal lag"
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echo "MaxLag.draw LINE"
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echo "MaxLag.colour 0066B3"
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## Uptime is commented out, because high
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## numbers will break whole graph
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# echo "Uptime.label Uptime"
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# echo "Uptime.draw LINE"
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else
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COUNT=0
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while read LINE; do
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case $COUNT in
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0)
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echo "PlayerCap.value $LINE"
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COUNT=$((COUNT+1))
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;;
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1)
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echo "PlayersConnected.value $LINE"
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COUNT=$((COUNT+1))
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;;
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2)
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echo "MaxLag.value $LINE"
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COUNT=$((COUNT+1))
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;;
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## Uptime is commented out, because high
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## numbers will break whole graph
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# 3)
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# echo "Uptime.value $LINE"
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# COUNT=$((COUNT+1))
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# ;;
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esac
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done <$WORLDFILE
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fi
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