linux之实时监控网卡流量
脚本如下
#!/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 '{print $2}') TXnext=$(cat /proc/net/dev | grep $eth | tr : " " | awk '{print $10}') clear echo -e "t RX `date +%k:%M:%S` TX" RX=$((${RXnext}-${RXpre})) TX=$((${TXnext}-${TXpre})) 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 $1/1024 "KB/s"}') fi echo -e "$eth t $RX $TX " done
用法:
[root@sf106232 ~]# sh check_eth.sh eth0
结果:
t RX 19:13:36 TX
eth0 t 60B/s 0B/s
t RX 19:13:38 TX
eth0 t 60B/s 0B/s
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