80 port concurrent connection count
# netstat -nap | grep :80 | grep ESTABLISHED | wc -l
80 port connection count
# netstat -n|grep -F :80|egrep '(ESTAB|SYN)'|awk '{print $5}'|sed 's/:[0-9]*//'|sort -u|wc -l
all port connection count
# netstat -nap | grep ESTABLISHED | wc -l