#!/bin/bash export PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin NIC=$1 echo -e "Time ----------------- In ------- Out" while true; do OLD_IN=$(awk '/'$NIC'/ {print $2}' /proc/net/dev) OLD_OUT=$(awk '/'$NIC'/ {print $10}' /proc/net/dev) sleep 1 NEW_IN=$(awk '/'$NIC'/ {print $2}' /proc/net/dev) NEW_OUT=$(awk '/'$NIC'/ {print $10}' /proc/net/dev) IN=$(printf "%.1f%s" "$((($NEW_IN-$OLD_IN)/1024))" "KB/s") OUT=$(printf "%.1f%s" "$((($NEW_OUT-$OLD_OUT)/1024))" "KB/s") echo "$(date "+%Y-%m-%d %H:%M:%S") $IN $OUT" done