Robert Heller wrote:
> At Fri, 3 Dec 2010 12:57:59 -0800 (PST) CentOS mailing list
> <centos@xxxxxxxxxx> 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
>>
>> Â Â 1 CLOSE_WAIT
>> Â Â 1 FIN_WAIT_2
>> Â Â 1 LAST_ACK
>> Â Â 1 TIME_WAIT
>> Â Â 4 SYN_SENT
>> Â 15
>> Â 37 LISTEN
>> Â 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.
Why do people use awk without using it?
netstat -an | awk '{if ($0 ~ /tcp|udp/){ print $6;}END { print NF;}' gets
you the number of lines at the end. Or, to be more elegant,
netstat -an | \
awk '{if ($0 ~ /tcp|udp/) {
array[$6] += 1;
}
END {
for ( i in array ) {
print i;
sum += array[i];
}
print sum;
}'
mark "me? like awk? yell at Larry Wall in '94 for proselytizing
perl in comp.language.awk?"
_______________________________________________
CentOS mailing list
CentOS@xxxxxxxxxx
http://lists.centos.org/mailman/listinfo/centos
