03.Linux网速脚本

#!/bin/bash
 
ethn=$1
 
while true
do
 RX_pre=$(cat /proc/net/dev | grep $ethn | sed 's/:/ /g' | awk '{print $2}')
 TX_pre=$(cat /proc/net/dev | grep $ethn | sed 's/:/ /g' | awk '{print $10}')
 sleep 1
 RX_next=$(cat /proc/net/dev | grep $ethn | sed 's/:/ /g' | awk '{print $2}')
 TX_next=$(cat /proc/net/dev | grep $ethn | sed 's/:/ /g' | awk '{print $10}')
 
 clear
 
 RX=$((${RX_next}-${RX_pre}))
 TX=$((${TX_next}-${TX_pre}))
 
 if [[ $RX -lt 1024 ]];then
 RX="${RX}B/s"
 elif [[ $RX -gt 1048576 ]];then
 RX=$(echo $RX | awk '{print $1/1048576 "MB/s"}')
 else
 RX=$(echo $RX | awk '{print $1/1024 "KB/s"}')
 fi
 
 if [[ $TX -lt 1024 ]];then
 TX="${TX}B/s"
 elif [[ $TX -gt 1048576 ]];then
 TX=$(echo $TX | awk '{print $1/1048576 "MB/s"}')
 else
 TX=$(echo $TX | awk '{print $1/1024 "KB/s"}')
 fi

 echo "* * * * * * * * * * * * *"
 echo -e "*\t\t\t*"
 echo -e "*\t当前时间\t*"
 echo -e "*\t`date +%k:%M:%S`\t*"
 echo -e "*\t\t\t*"
 echo "* * * * * * * * * * * * *"
 echo ""
 echo "网卡："
 echo "$ethn"
 echo ""
 echo -e "下行(RX)"
 echo -e "$RX"
 echo ""
 echo -e "上行(TX)"
 echo -e "$TX"
 echo ""
 
done

使用方法：

./netspeed.sh eth0