[root@localhost bin]# netstat -n | grep 80
tcp 1 0 192.168.11.4:46009 72.21.40.11:80 CLOSE_WAIT
tcp 1 0 192.168.11.4:46013 72.21.40.11:80 CLOSE_WAIT
tcp 1 0 192.168.11.4:46325 218.227.162.248:80 CLOSE_WAIT
tcp 1 0 192.168.11.4:46327 218.227.162.248:80 CLOSE_WAIT
tcp 1 0 192.168.11.4:46304 64.92.174.75:80 CLOSE_WAIT
tcp 1 0 192.168.11.4:46300 64.92.174.75:80 CLOSE_WAIT
[root@localhost bin]# netstat -n | grep 80 | wc -l
6
[root@localhost bin]#