Shell脚本实现的单机流量统计功能

在网上看到这个单机流量的脚本，挺不错的。

#!/bin/sh
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 | 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

测试如下:

每三秒的流量,总输出999行,可以输出到文件里,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.

[root@host]#sh t.sh -c 999  monitoring eth0 every 3 seconds. (rxbyte total = 6 tb txbytes total = 5 tb)
20101105-201539 rxbytes = 126 kb txbytes = 658 kb
20101105-201542 rxbytes = 87 kb txbytes = 487 kb
20101105-201545 rxbytes = 159 kb txbytes = 668 kb
20101105-201548 rxbytes = 107 kb txbytes = 725 kb
20101105-201551 rxbytes = 110 kb txbytes = 704 kb
20101105-201554 rxbytes = 90 kb txbytes = 726 kb
20101105-201558 rxbytes = 100 kb txbytes = 850 kb
20101105-201601 rxbytes = 102 kb txbytes = 703 kb
20101105-201604 rxbytes = 168 kb txbytes = 693 kb
20101105-201607 rxbytes = 105 kb txbytes = 730 kb
20101105-201610 rxbytes = 133 kb txbytes = 711 kb
20101105-201613 rxbytes = 431 kb txbytes = 703 kb
20101105-201616 rxbytes = 84 kb txbytes = 527 kb
20101105-201619 rxbytes = 239 kb txbytes = 825 kb
20101105-201622 rxbytes = 117 kb txbytes = 801 kb
20101105-201625 rxbytes = 99 kb txbytes = 913 kb
20101105-201628 rxbytes = 89 kb txbytes = 322 kb
20101105-201631 rxbytes = 63 kb txbytes = 73 kb
20101105-201634 rxbytes = 84 kb txbytes = 191 kb
20101105-201637 rxbytes = 174 kb txbytes = 481 kb
20101105-201640 rxbytes = 120 kb txbytes = 383 kb
20101105-201643 rxbytes = 94 kb txbytes = 496 kb
20101105-201646 rxbytes = 108 kb txbytes = 340 kb
20101105-201649 rxbytes = 91 kb txbytes = 639 kb
20101105-201652 rxbytes = 106 kb txbytes = 629 kb
20101105-201655 rxbytes = 125 kb txbytes = 496 kb
20101105-201658 rxbytes = 90 kb txbytes = 537 kb
20101105-201701 rxbytes = 114 kb txbytes = 641 kb