How to check linux port occupation

description

Check the occupancy of a certain port in linux,

command

netstat -apn|grep 3306

parameter

netstat :  Used to display various network related information, such as network connection, routing table, interface status (Interface Statistics), masquerade connection
-a, --all :  show all sockets (default :  connected)
-p, --programs :  display the PID/program name of the socket
-n, --numeric :  don't resolve names
grep :  used to find qualified strings in the file

result

tcp        0      0 0.0.0.0:3306            0.0.0.0:*               LISTEN      2067/docker-proxy
tcp6       0      0 :::3306                 :::*                    LISTEN      2071/docker-proxy

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