方法一：将下列脚本保存为可执行脚本文件，比如保存为flow.sh #!/bin/bash while [ "1" ] do eth=$1 RXpre=$(cat /proc/net/dev | grep $eth | tr : " " | awk '{print $2}') TXpre=$(cat /proc/net/dev | grep $eth | tr : " " | awk '{print $10}') sleep 1 RXnext=$(cat /proc/net/dev | grep $eth | tr : " " | awk '{pr...