On the internet to see this single flow of the script, very good.
Copy Code code as follows:
#!/bin/sh
Usage () {
echo "Usage: $ [i INTERFACE] [-S INTERVAL] [-C COUNT]"
Echo
echo "-I INTERFACE"
echo "The interface to monitor, and the default is Eth0."
echo "-S INTERVAL"
echo "The time to wait in seconds between measurements, and the default is 3 seconds."
echo "-C COUNT"
echo "The number of times to measure, and the default is."
Exit 3
}
Readargs () {
While ["$#"-GT 0]; Todo
Case "$1″in
-I.)
If ["$"]; Then
Interface= "$2″
shift; Shift
Else
echo "Missing a value for $."
Echo
Shift
Usage
Fi
;;
-s)
If ["$"]; Then
Sleep= "$2″
shift; Shift
Else
echo "Missing a value for $."
Echo
Shift
Usage
Fi
;;
-c)
If ["$"]; Then
Counter= "$2″
shift; Shift
Else
echo "Missing a value for $."
Echo
Shift
Usage
Fi
;;
*)
echo "Unknown option $."
Echo
Shift
Usage
;;
Esac
Done
}
Checkargs () {
if [! "$interface"]; Then
Interface= "Eth0″
Fi
if [! "$sleep"]; Then
Sleep= "3″
Fi
if [! "$counter"]; Then
Counter= "10″
Fi
}
Printrxbytes () {
/sbin/ifconfig "$interface" | grep "RX bytes" | Cut-d:-f2 | awk ' {print '} '
}
Printtxbytes () {
/sbin/ifconfig "$interface" | grep "TX bytes" | Cut-d:-f3 | awk ' {print '} '
}
Bytestohumanreadable () {
Multiplier= "0″
Number= "$1″
While ["$number"-ge 1024]; Todo
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 "$ b"
;;
Esac
}
Printresults () {
While ["$counter"-ge 0]; Todo
Counter=$ (($counter – 1))
If ["$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 = $ (bytestohumanr Eadable $ (($txbytes – $oldtxbytes))) "
Else
echo "Monitoring $interface every $sleep seconds. (Rxbyte total = $ (bytestohumanreadable $rxbytes) txbytes total = $ (bytestohumanreadable $txbytes)) "
Fi
Sleep "$sleep"
Done
}
Readargs "$@"
Checkargs
Printresults
The test is as follows:
Every three seconds of traffic, the total output of 999 lines, you can output to the file, which: the Front for the time, Rx Packets is to receive packets, that is, download, Tx Packets is to send packets, that is, upload.
Copy Code code as follows:
[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 = kb txbytes = 487 kb
20101105-201545 rxbytes = 159 kb txbytes = 668 kb
20101105-201548 rxbytes = kb Txbytes = 725 kb
20101105-201551 rxbytes = $ kb txbytes = 704 kb
20101105-201554 rxbytes = MB Txbytes = 726 kb
20101105-201558 rxbytes = MB Txbytes = 850 kb
20101105-201601 rxbytes = 102 KB txbytes = 703 kb
20101105-201604 rxbytes = kb Txbytes = 693 kb
20101105-201607 rxbytes = txbytes = 730 kb
20101105-201610 rxbytes = txbytes KB = 711 kb
20101105-201613 rxbytes = 431 KB txbytes = 703 kb
20101105-201616 rxbytes = kb Txbytes = 527 kb
20101105-201619 rxbytes = 239 kb txbytes = 825 kb
20101105-201622 rxbytes = 117 kb txbytes = 801 kb
20101105-201625 rxbytes = kb Txbytes = 913 kb
20101105-201628 rxbytes = kb Txbytes = 322 Kb
20101105-201631 rxbytes = MB Txbytes = kb
20101105-201634 rxbytes = kb txbytes = 191 kb
20101105-201637 rxbytes = 174 kb txbytes = 481 kb
20101105-201640 rxbytes = MB Txbytes = 383 kb
20101105-201643 rxbytes = kb txbytes = 496 kb
20101105-201646 rxbytes = 108 kb txbytes = KB
20101105-201649 rxbytes = MB Txbytes = 639 Kb
20101105-201652 rxbytes = txbytes = 629 kb
20101105-201655 rxbytes = MB Txbytes = 496 kb
20101105-201658 rxbytes = MB Txbytes = 537 kb
20101105-201701 rxbytes = 114 kb Txbytes = 641 kb
