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Internet Protocol, Transport Control Protocol, Network protocols, Routing, Routers, IP aliases, Routes, Ethernet
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admin
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Post subject: Linux script for interface network bandwidth monitoring | Posted: Mon Feb 09, 2015 7:05 pm |
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Joined: Mon Aug 03, 2009 8:43 am
Posts: 104
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Linux script for interface network bandwidth monitoring
This is a simple script that gets RX / TX values of an interface from /sys pseudo filesystem and calculate difference between current and old values displaying a bandwidth output for kilobytes per second. Code: #!/bin/bash
INT="1" # every INT seconds
while true
do
RX1=`cat /sys/class/net/$1/statistics/rx_bytes`
TX1=`cat /sys/class/net/$1/statistics/tx_bytes`
sleep $INT
RX2=`cat /sys/class/net/$1/statistics/rx_bytes`
TX2=`cat /sys/class/net/$1/statistics/tx_bytes`
TXBPS=`expr $TX2 - $TX1`
RXBPS=`expr $RX2 - $RX1`
TXKBPS=`expr $TXBPS / 1024`
RXKBPS=`expr $RXBPS / 1024`
echo "TX $1: $TXKBPS kb/s RX $1: $RXKBPS kb/s"
done
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