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28 lines
530 B
Text
28 lines
530 B
Text
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#!/usr/bin/env bash
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TIMESPAN=1
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if [ -z $1 ]; then
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echo "Error: no device specified"
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exit 1
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fi
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if [ ! -d /sys/class/net/$1 ]; then
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echo "No such device: $1"
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exit 1
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fi
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BR1=`cat /sys/class/net/$1/statistics/rx_bytes`
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BT1=`cat /sys/class/net/$1/statistics/tx_bytes`
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sleep $TIMESPAN
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BR2=`cat /sys/class/net/$1/statistics/rx_bytes`
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BT2=`cat /sys/class/net/$1/statistics/tx_bytes`
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DOWNKB=$(((($BR2-$BR1) / $TIMESPAN) /1024))
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UPKB=$(((($BT2-$BT1) / $TIMESPAN) /1024))
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echo "D ${DOWNKB}KB/s | U ${UPKB}KB/s"
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exit 0
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