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Awk snippet to count TCP sockets grouped by state

Depending on the release of awk it could be:

#!/usr/bin/gawk -f
{
        if ( ($NF) in stats )  {
                stats[$NF] = stats[$NF]+1;
        } else {
                stats[$NF]=1;
        }
}
END {
        for ( var in stats) {
                print var " = " stats[var];
        }
}

I saved the script as netstat_c.
I have to filter my netstat output to match only my tcp sockets prior to pipe the output to the script.

On linux:

$ netstat -a | grep ^tcp | netstat_c
LISTEN = 13
ESTABLISHED = 74
TIME_WAIT = 7

This is great to check my webserver connections when I do stress tests.

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This entry was posted on Monday, January 19th, 2009 at 5:47 pm and is filed under Linux. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

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