统计网络流量

分享一个脚本统计网络流量：

#!/bin/bash# Almost everything of this is shamelessly copied from# http://www.lugmen.org.ar/~conan/tmp/wmii/statuswhile true; do    RX0=`/bin/grep eth0 /proc/net/dev | tr ':' ' ' | awk {'print $2'}`    TX0=`/bin/grep eth0 /proc/net/dev | tr ':' ' ' | awk {'print $10'}`    sleep 2    RX1=`/bin/grep eth0 /proc/net/dev | tr ':' ' ' | awk {'print $2'}`    TX1=`/bin/grep eth0 /proc/net/dev | tr ':' ' ' | awk {'print $10'}`    RX="$(((RX1-RX0)/2048))"    TX="$(((TX1-TX0)/2048))"    RX="DOWN `printf %3d $RX`KB/s"    TX="UP   `printf %3d $TX`KB/s"    echo "$RX $TX"done