[bash] TX/RX MB/s in Linux(netspeed.sh)

2022-09-29   //   alexken작성   //   기술  //  No Comments 
#!/usr/bin/bash

INTERVAL="1"  # update interval in seconds

if [ -z "$1" ]; then
        echo
        echo usage: $0 [network-interface]
        echo
        echo e.g. $0 eth0
        echo command for network interface [netstat -i]
        exit
fi

IF=$1

while true
do
        R1=`cat /sys/class/net/$1/statistics/rx_bytes`
        T1=`cat /sys/class/net/$1/statistics/tx_bytes`
        sleep $INTERVAL
        R2=`cat /sys/class/net/$1/statistics/rx_bytes`
        T2=`cat /sys/class/net/$1/statistics/tx_bytes`
        TBPS=`expr $T2 - $T1`
        RBPS=`expr $R2 - $R1`
        TMBPS=`expr $TBPS / 1048576`
        RMBPS=`expr $RBPS / 1048576`
        echo "[$(date +%F_%T)] TX $1: $TMBPS MB/s RX $1: $RMBPS MB/s"
done