Robert Heller wrote: > 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 >> >> 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?"