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On linux, I'm used to typing ifconfig and looking for the line with "RX bytes" and "TX bytes" in it to find out how many bytes have been received and transmitted over a particular interface since boot. The line looks like this:

      RX bytes:106951129 (101.9 MB)  TX bytes:1577761831 (1.4 GB)

I tried running the same command in a terminal on a Mac (OS X, version 10.4.11) but didn't see this data anywhere. How do I get the same information from a Mac?

Edit: This is a test server, meant to simulate a typical out-of-the-box Mac install. So I need to avoid installing any programs if I can. A command-line tool would be ideal.

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netstat -ib

seems to do the trick. Thanks to nik for pointing in the right direction. (Putting the result in a new answer so as not to make future readers dig through comments.)

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  • From user Girish: Just building on this answer, netstat -ib -I en0 would return the stats for a specific interface. – fixer1234 Dec 9 '18 at 0:32
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The easiest way I know of seeing bytes in/out over an interface (w/o command line) is with MenuMeters. You can see all that info right on the top bar so it's always visually accessible.

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  • This mac is a test server so I don't want to install stuff on it if I can avoid it. I need a command-line tool if at all possible. I'll edit the question to say that. – Douglas Squirrel Sep 1 '09 at 15:41
  • Whoops. Sorry, I thought this was for a desktop. :) – osij2is Sep 1 '09 at 15:54
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Try ifconfig -a.
But, I suspect there is a better command for the OSX.
It is discouraged to use the ifconfig command in OSX like its used in Linux.

check networksetup or netstat.

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  • ifconfig -a doesn't have the number of bytes (or if it does, I can't find it). networksetup doesn't seem to be available, and netstat (and netstat -a) doesn't seem to have it either. – Douglas Squirrel Sep 1 '09 at 15:40
  • I expected "netstat -i en0" kind of command for the first Ethernet interface. – nik Sep 1 '09 at 15:49

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