The actual application of the Linux/shell command--View port occupancy

The Linux/shell command is primarily intended to address:

1, check whether a port is occupied;

2, check which process is occupied by a port;

3. See which ports a process occupies;

For example, my Tomcat failed to start, the log display port is occupied, you can use the following command to view the specified port (tomcat default port 8080) exactly which process is occupied

NETSTAT-ANPT | grep 8080

For example, I'm running Tomcat, but I can't access this way through http://ip:8080/xxx, so I can see if the Tomcat process is listening on port 8080 (assuming tomcat pid = 23773)

NETSTAT-ANPT | grep 23773