Port Connections

Running service in TCP port

netstat -nltp

Connected IP address

netstat -ntu|awk '{print $5}'|cut -d: -f1 -s|sort|uniq -c|sort -nk1 -r

Alive connection for HTTP service

netstat -ant | grep -E ':80|:443' | grep -v grep | wc -l

ss -ant | grep -E ':80|:443' | grep -v grep | wc -l

Watch connections

watch -n1 'for port in 80 443; do echo port $port; netstat -ant | grep -E ":$port" | grep -v grep | wc -l; done'