[cobalt-users] RaQ4 daily bandwidth report script

["aljuhani" <aljuhani@xxxxxxxxx>]

I have a script insalled under my /etc/cron.daily for measuring Bandwidth used every 24 hours.  It sends an email every day telling me how much Tx and Rx bytes have gone over eth0.  Below is a report received today.  My question is about the 5th line (Total Mbytes changed : 309) what does it represnts exactly and what conversions needed to conver it to actual bandwidth value as 309 MB is not a realistic figure.

_____BANDWIDTH REPORT______

Network Usage Stats 20020720-040646
-----------------------------------
Tx bytes change from last report : 9316927
Rx bytes change from last report : 314854476
Total bytes changed from last report : 324171403
Total Kbytes changed : 316573
Total Mbytes changed : 309
Total Gbytes changed : 0
Daily allowance in Mbytes : 341

___SCRIPT USED UNDER /etc/cron.daily___
#!/bin/sh

YOUREMAIL=YourEmailAddress@xxxxxxxxxxxxxx

DATETIME=`date +%Y%m%d-%H%M%S`
OBytesIN=`cat /tmp/bytesin.txt`
OBytesOUT=`cat /tmp/bytesout.txt`
NBytesIN=`cat /proc/net/dev | grep eth0 | awk '{print $1}' | awk -F : '{print $2}'`
NBytesOUT=`cat /proc/net/dev | grep eth0 | awk '{print $9}'`
OUTChange=`expr $NBytesOUT - $OBytesOUT`
INChange=`expr $NBytesIN - $OBytesIN`
TOTChange=`expr $OUTChange + $INChange`
Kbytes=`expr $TOTChange / 1024`
Mbytes=`expr $Kbytes / 1024`
Gbytes=`expr $Mbytes / 1024`
echo $NBytesIN > /tmp/bytesin.txt
echo $NBytesOUT > /tmp/bytesout.txt

echo subject: Network Usage > /tmp/mail.txt
echo >> /tmp/mail.txt
echo Network Usage Stats $DATETIME >> /tmp/mail.txt
echo ----------------------------------- >> /tmp/mail.txt
echo Tx bytes change from last report : $OUTChange >> /tmp/mail.txt
echo Rx bytes change from last report : $INChange >> /tmp/mail.txt
echo Total bytes changed from last report : $TOTChange >> /tmp/mail.txt
echo Total Kbytes changed : $Kbytes >> /tmp/mail.txt
echo Total Mbytes changed : $Mbytes >> /tmp/mail.txt
echo Total Gbytes changed : $Gbytes >> /tmp/mail.txt
echo Daily allowance in Mbytes : 341 >> /tmp/mail.txt
echo . >> /tmp/mail.txt
/usr/sbin/sendmail $YOUREMAIL < /tmp/mail.tx

Best regards. 

aljuhani
aljuhani@xxxxxxxxx