Check Apache concurrent Connections using Netstat command

$ netstat -tn 2>/dev/null | grep :80 | awk '{print $5}' | cut -d: -f1 | sort | uniq -c | sort -nr | head

หรือ

$ netstat -plan|grep :80|awk {'print $5'}|cut -d: -f 1|sort|uniq -c|sort -nk 1

• ต้องการแค่บรรทัด แรก ก็

$ netstat -tn 2>/dev/null | grep :80 | awk '{print $5}' | cut -d: -f1 | sort | uniq -c | sort -nr | head -n 1

Ref

• https://www.cloudtechtiq.com/blog/check-apache-concurrent-connections-using-netstat-command
• https://askubuntu.com/questions/239631/how-can-i-watch-the-current-connections-on-my-apache-webserver
• https://fedingo.com/how-to-check-number-of-concurrent-connections-in-apache/
• https://www.2daygeek.com/linux-check-apache-concurrent-connections-netstat-ss-command/
• https://stackoverflow.com/questions/46021955/get-first-line-of-a-shell-commands-output