Linux query port occupancy

For example, we need to query the occupancy of the three ports "8080|8848|9600" :

Linux & macOS operating system environment, available

netstat -an | grep -E "8080|8848|9600" | grep -i listen

Command to check whether the above three ports are in the listening state.

Linux operating system can also be used

 netstat -nltp | grep -E "8080|8848|9600" 

To check the open status of these three ports and whether the process is open.