一个监控网卡流量的shell脚本

实现代码：

#！/bin/basheth_in_old=$（ifconfig eth0|grep "RX bytes"|sed "s/RX bytes://"|awk "{print $1}"）eth_out_old=$（ifconfig eth0|grep "RX bytes"|sed "s/.*TX bytes://"|awk "{print $1}"）sleep 1eth_in_new=$（ifconfig eth0|grep "RX bytes"|sed "s/RX bytes://"|awk "{print $1}"）eth_out_new=$（ifconfig eth0|grep "RX bytes"|sed "s/.*TX bytes://"|awk "{print $1}"）eth_in=$（echo "scale=2;（$eth_in_new - $eth_in_old）/1000.0"|bc）eth_out=$（echo "scale=2;（$eth_out_new - $eth_out_old）/1000" | bc）echo "IN: $eth_in KB"echo "OUT:$eth_out KB"

输出：
[root@localhost hbshell]# ./traffic.sh

IN: 1.74 KB
OUT:1.17 KB