Kill the process that occupies the specified port

Sometimes when Tomcat is started, it fails to start, saying that the port is already occupied, so which program takes up the port?
How can I tell which process (program) is taking up the specified port?
Below I will be divided into two platforms (Windows,linux) for detailed description

1. Windows system

Use the following command to find the PID (process ID) that occupies the specified port

<指定的端口号>

For example, find a process that occupies port 8080

Indicates that a process with a PID of 1532 consumes 8080 ports

Then we open the Task Manager, find the process,

So how do we kill the process?

taskkill  1532  /f

Note: PID is followed by

1. Linux

Use the following command to find the PID (process ID) that occupies the specified port

-aonp|":80[ ]\+"|-F" "   {‘print $0‘}

This is the process of querying 80 ports

Indicates that a process with a PID of 11116 consumes 80 ports
The following optimizations are followed:

netstat -aonp |grep "^[a-z]\+[]\+0[]\+0[]\+[0-9\.]\+:80[]\+"|awk -F" "   {$0‘}

Well, let's check it out.

Sure enough, Tomcat takes up 80 ports.
What if only PID is displayed?

-anp|"^[a-z]\+[ ]\+0[ ]\+0[ ]\+[0-9\.]\+:80[ ]\+"|-F" "   {‘print $7‘}|-d"/"-f1

So how do you kill the process in Linux?

kill -911116

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Kill the process that occupies the specified port