例子，单机流量统计的shell/ target=_blank class=infotextkey>shell脚本：
#!/bin/sh
# 流量统计
# www.jb200.com
usage(){
echo “Usage: $0 [-i INTERFACE] [-s INTERVAL] [-c COUNT]”
echo
echo “-i INTERFACE”
echo “ The interface to monitor, default is eth0.”
echo “-s INTERVAL”
echo “ The time to wait in seconds between measurements, default is 3 seconds.”
echo “-c COUNT”
echo “ The number of times to measure, default is 10 times.”
exit 3
}
readargs(){
while [ "$#" -gt 0 ] ; do
case “$1″ in
-i)
if [ "$2" ] ; then
interface=”$2″
shift ; shift
else
echo “Missing a value for $1.”
echo
shift
usage
fi
;;
-s)
if [ "$2" ] ; then
sleep=”$2″
shift ; shift
else
echo “Missing a value for $1.”
echo
shift
usage
fi
;;
-c)
if [ "$2" ] ; then
counter=”$2″
shift ; shift
else
echo “Missing a value for $1.”
echo
shift
usage
fi
;;
*)
echo “Unknown option $1.”
echo
shift
usage
;;
esac
done
}
checkargs(){
if [ ! "$interface" ] ; then
interface=”eth0″
fi
if [ ! "$sleep" ] ; then
sleep=”3″
fi
if [ ! "$counter" ] ; then
counter=”10″
fi
}
printrxbytes(){
/sbin/ifconfig “$interface” | grep “RX bytes” | cut -d: -f2 | linuxjishu/13830.html target=_blank class=infotextkey>awk ‘{ print $1 }'
}
printtxbytes(){
/sbin/ifconfig “$interface” | grep “TX bytes” | cut -d: -f3 | awk ‘{ print $1 }'
}
bytestohumanreadable(){
multiplier=”0″
number=”$1″
while [ "$number" -ge 1024 ] ; do
multiplier=$(($multiplier+1))
number=$(($number/1024))
done
case “$multiplier” in
1)
echo “$number Kb”
;;
2)
echo “$number Mb”
;;
3)
echo “$number Gb”
;;
4)
echo “$number Tb”
;;
*)
echo “$1 b”
;;
esac
}
printresults(){
while [ "$counter" -ge 0 ] ; do
counter=$(($counter – 1))
if [ "$rxbytes" ] ; then
oldrxbytes=”$rxbytes”
oldtxbytes=”$txbytes”
fi
rxbytes=$(printrxbytes)
txbytes=$(printtxbytes)
if [ "$oldrxbytes" -a "$rxbytes" -a "$oldtxbytes" -a "$txbytes" ] ; then
echo “$(/bin/date +%Y%m%d-%H%M%S) RXbytes = $(bytestohumanreadable $(($rxbytes – $oldrxbytes))) TXbytes = $(bytestohumanreadable $(($txbytes – $oldtxbytes)))”
else
echo “Monitoring $interface every $sleep seconds. (RXbyte total = $(bytestohumanreadable $rxbytes) TXbytes total = $(bytestohumanreadable $txbytes))”
fi
sleep “$sleep”
done
}
readargs “$@”
checkargs
printresults
流量统计，测试例子：
每三秒的流量，总输出999行，可以输出到文件中。
其中：前面为时间,Rx Packets 是接收数据包,即下载,Tx Packets 是发送数据包,即上传。
代码：