CentOS system view specified port status and kill

The results of the query find the process for the grep containing a specific string by pipeline. Pipe character "|" Used to separate two commands, the output of the command on the left side of the pipe will be the input to the right command of the pipe character

For example, view the status of Port 8083:

[Root@server1 ~]# NETSTAT-APN | grep 8083

TCP 0 0 192.168.2.17:8083 0.0.0.0:* LISTEN 3877/java

[Root@server1 ~]# kill-9 3877

Add: Pgrep:

What do you think first when you see Pgrep? Yes, grep!. Pgrep's p indicates that this command is dedicated to grep for process queries.

$ pgrep Firefox

1827

What did you see? Yes, Firefox's PID, and then you're typing:
$kill-S 9 1827