脚本实时监控网卡流量

1 #!/bin/bash 2 while [ "1" ] 3 do 4 eth=$1 5 RXpre=$(cat /proc/net/dev | grep $eth | tr : " " | awk '{print $2}') 6 TXpre=$(cat /proc/net/dev | grep $eth | tr : " " | awk '{print $10}') 7 sleep 1 8 RXnext=$(cat /proc/net/dev | grep $eth | tr : " " | awk '{print $2}') 9 TXnext=$(cat /proc/net/dev | grep $eth | tr : " " | awk '{print $10}') 10 clear 11 echo -e "\t RX `date +%k:%M:%S` TX" 12 RX=$((${RXnext}-${RXpre})) 13 TX=$((${TXnext}-${TXpre})) 14 if [[ $RX -lt 1024 ]];then 15 RX="${RX}B/s" 16 elif [[ $RX -gt 1048576 ]];then 17 RX=$(echo $RX | awk '{print $1/1048576 "MB/s"}') 18 else 19 RX=$(echo $RX | awk '{print $1/1024 "KB/s"}') 20 fi 21 if [[ $TX -lt 1024 ]];then 22 TX="${TX}B/s" 23 elif [[ $TX -gt 1048576 ]];then 24 TX=$(echo $TX | awk '{print $1/1048576 "MB/s"}') 25 else 26 TX=$(echo $TX | awk '{print $1/1024 "KB/s"}') 27 fi 28 echo -e "$eth \t $RX $TX " 29 done