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I need to keep watch on how much bandwidth some connections are taking in a server, and I know I have seen a top-like tool for that before. However, I can't remember the name of the tool, and I'm not having much luck searching for it.

So, is there a top-like tool for that? I'm running Debian.

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what OS are you looking at? – Jim B Jun 10 '11 at 14:21

6 Answers

up vote 21 down vote accepted

iftop or pktstat -nT (for short term monitoring) is what you need to do this (under *nix). For long-term monitoring, ntop is useful

Finding pktstat is a little tricky for those who aren't running a Debian / Ubuntu box, but I have one found one decent pktstat source-code archive

Use tcpview if you want the same kind of stats under windows

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up vote 10 down vote

You might also want to have a look at iptraf.

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up vote 3 down vote

There's also nethogs which shows traffic per process, most of the popular distros have a package for it.

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up vote 3 down vote

I am partial for pktstat. It can easily also show real-time data on the traffic as URLs for HTTP GETs, queries for DNS, etc.

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Ok, I'm really enjoying pktstat. I like iftop's display better, but seeing the URLs is particularly useful for me at the moment! I'll stick with my original accepted answer on the grounds that it provided a Windows alternative as well, and that iftop does the job. – Daniel C. Sobral Jun 10 '11 at 18:29
up vote 0 down vote

There is also ntop, although it isn't terminal based anymore.

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up vote 0 down vote

jnettop is my personal favorite. Seems to exist for most distros. Ref: http://jnettop.kubs.info/wiki/

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