[CentOS] Total Number of conecctions

Fri Dec 3 21:18:50 UTC 2010
Robert Heller <heller at deepsoft.com>

At Fri, 3 Dec 2010 12:57:59 -0800 (PST) CentOS mailing list <centos at centos.org> wrote:

> 
> 
> 
> I have the need to know how many connection the server has, i run this command but i don't know how to sum all the results and get a final number.
> any ideas?
> 
> netstat -an | grep -E 'tcp|udp' | awk '{print $6}' | sort | uniq -c | sort -n
> 
>    1 CLOSE_WAIT
>    1 FIN_WAIT_2
>    1 LAST_ACK
>    1 TIME_WAIT
>    4 SYN_SENT
>   15
>   37 LISTEN
>   44 ESTABLISHED

 <the above script> | awk '{print $1;}' | tr '\n' '+'|sed 's/\+$//g'|bc

The awk prints just the number, the tr replaces the newlines with +'s,
the sed strips off the trailing + (from the last newline), and bc does
the math.

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Robert Heller             -- 978-544-6933 / heller at deepsoft.com
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