To Count Apache concurrent connection's, use any of the below commands.
netstat -nt | grep :80 | wc -l
netstat -plan|grep :80 | wc -l
netstat -an | grep 'EST' | wc -l
netstat -ant | grep ESTABLISHED | grep :80 | wc -l
ps -A | grep httpd | wc -l
ps -ef | grep http | wc -l
ps aux | grep httpd | wc -l
ps aux | grep http | grep -v "\(root\|grep\)" | wc -l
To print the active Internet connections to the server at port 80 and sort the results, use the below commands.
netstat -an | grep :80 | sort
netstat -plan | grep :80
netstat -anp | grep :80
To calculate and count, number of connection currently established from each IP address with server.
netstat -ntu | awk '{print $5}' | cut -d: -f1 | sort | uniq -c | sort -n
To calculate and count, number of connection currently established from each IP address through TCP or UDP protocol with server.
netstat -anp |grep 'tcp\|udp' | awk '{print $5}' | cut -d: -f1 | sort | uniq -c | sort -n
To Print ESTABLISHED connections instead of all connections, and displays the connections count for each IP
netstat -ntu | grep ESTAB | awk '{print $5}' | cut -d: -f1 | sort | uniq -c | sort -nr
To print the list of IP address and its connection count, that connect to port 80 on the server.
netstat -plan|grep :80|awk {'print $5'}|cut -d: -f 1|sort|uniq -c|sort -nk 1
To print all the apache httpd actual processes in Linux, use the below commands.
ps -aux | grep httpd or ps -ef | grep httpd
