监控网卡实时流量脚本

• 使用方法：./x.sh 网卡名

#!/bin/bash

NIC=$1

echo -e " In ------ Out"

while true; do

OLD_IN=$(awk '$0~"'$NIC'"{print $2}' /proc/net/dev)

OLD_OUT=$(awk '$0~"'$NIC'"{print $10}' /proc/net/dev)

sleep 1

NEW_IN=$(awk '$0~"'$NIC'"{print $2}' /proc/net/dev)

NEW_OUT=$(awk '$0~"'$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 "$IN $OUT"

sleep 1

done