#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
Information from:
https://www.2daygeek.com/count-check-apache-concurrent-connections-using-netstat-command/#