VnStat – A network traffic monitor for Linux and BSD | Hacker News Reader

VnStat – A network traffic monitor for Linux and BSD

humdi.net

70 pointsmerah9 comments

You can also use vnstat with vnstati to generate nice graphs.

I use it something like this with cron.

Bash - https://github.com/tuxy/bash/blob/master/vnstat.sh

HTML - https://github.com/tuxy/static/blob/master/vnstat.html

I've used vnstat for traffic monitoring on Linux/BSD routers for years, simple and does the job. The on-disk format is not machine-independent though, I had to start my records over when OpenBSD went to 64-bit time_t.

I have been using it for years as well but instead of having it running all the time I just run "vnstat -i eth0 -tr" every minute with cron and log that 5 second average result

Is there a reason why? I find vnstat to use zero noticeable resources even under high traffic load (1Gb)

Same.. It is one of the first things I install on a new server. I have never noticed it using gobs of RAM or CPU.

I'd hope it does, considering the man page says it literally reads the kernel's interface counters from /proc (or in other words, the kernel does all the counting). The daemon has its own polling time as well.

I have scripts collect all sorts of other data about the server and send it to central log server every minute, i do not really need exact data more of a snapshot (traffic, ram, cpu, harddrive etc etc) and well I do not like running things all time on server, tho' yes vnstat is very light

Been looking for a tool like iptraf or nethogs for OSX. nettop is ok. My favorite thus far are these two dtrace scripts for tracing network connections:

soconnect.d: http://dtracebook.com/index.php/Network_Lower_Level_Protocol...

soaccept.d: http://dtracebook.com/index.php/Network_Lower_Level_Protocol...

If you're on OSX and want to play around with dtrace, there are a bunch of really cool built-in scripts:

   man -k dtrace

`iftop` works well on OSX.

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