Bandwidth Measurement

Bandwidth Measurement:

========here first ===========

By iftop, I found another tool:
$ sudo apt-get install bwm-ng

by which, you can save the log into a file! it is more helpful.
I did not check in detail the usage of such tool, but the following command will allow you to generate a log in   /tmp/a.csv
which log all the networking status of the network interface eth0

$bwm-ng --count 0 -o csv -I eth0 -T 0.1 -u bytes -t 1000 > /tmp/a.csv

you can open .csv file directly in matlab for example.

for simple test (without log a file), you can use
$ bwm-ng --count 0  -I eth0 -T 0.1 -u bytes -t 1000
you can see the Rx (输入) Tx（输出） bandwidth in plain text.

Please try to study what does each column in the .csv file mean by yourself.

$ bwm-ng -h
gives you parameter setups.


for more information just check :

http://www.gropp.org/?id=projects&sub=bwm-ng

=====================
the tool is called "iftop"

install:

sudo apt-get install iftop

usage:

check
$ iftop -h

e.g.
sudo iftop -i eth0 -F ming-laptop -P