hi all,

how can we monitor network traffic or throughout on servers ? is it possible to put some large file on server and keep downloading via wget. Wheter this helps. please suggest

The normal means is to use a network sniffer. To add to that wget will not give you what you want, you want to monitor traffic, and this means you need an adapter in promiscuous mode which will capture all network packet types. There should be applications you can run to perform network sniffing and it is a matter of filtering unwanted data out, and also setting it up to log and not overflow or rotate the logs.

I don't really understand. Do you want to measure the speed of your network? Or you want to check the ongoing traffic somewhere? (Or something else??)
We have a lot of tools to do both of them, you can look for different solutions on the net. But without details hard to help you.

You've asked about measuring bandwidth/traffic before:
https://www.linuxquestions.org/quest...th-4175716612/

...and you have Nagios installed. As others said, your question is too vague. But monitoring bandwidth via SNMP through Nagios is certainly doable, as is using the scripts you wre given in your other post for manual checking. What is your actual goal??

1 members found this post helpful.

Yes, what is your actual goal?

More details are needed, otherwise it remains an unproductive guessing game.

That said, here's my current guess: vnstat.

I'm going to take a shot in the dark and suggest that you might want to take a look at iotop.

I wanted to monitor the network usage traffic for a host. Is it possible with wget ?

iotop is similar to atop i guess.

yes i wanted to check ongoing traffic on the server not the speed. something like tcpdump ?

wget is not the right tool for this. Otherwise why don't you try them (iotop, tcpdump, vnstat, whatever)? We don't really know what are you looking for therefore we can't tell you if these tool will provide the required data (for you).

...and...
...and...
Again: you have Nagios installed, along with iperf and have SNMP available. That is fully capable of logging/tracking/alerting on bandwidth usage, and you've been using them for years now.

Saying you want to "monitor" is too vague to answer...monitor how? How often? And do what with the information?? On what system? Same network/different?? You STILL omit details that would let anyone help you. Again: Nagios ALREADY DOES THIS, you already have it, and you've had years of experience using it. What, exactly, are you having problems with??
https://www.nagios.com/solutions/bandwidth-monitoring/
https://exchange.nagios.org/director...-and-Bandwidth
https://exchange.nagios.org/director...dwidth/details

Further (as you well know), you can write your own plugin using whatever you want for Nagios, iotop is one thing you can use, as is (again) SNMP. And have you read the man pages for iperf or tcpdump, and thought about what they do, and why they aren't good for what you're after?

you might want to try
nethogs

or you could use iptables
If you put entries into there without a target it will still count packets and bytes.