Security Tips: Quickly locate network services in Linux

Security Tips: Quickly locate the network service in Linux-general Linux technology-Linux technology and application information. The following is a detailed description. For security reasons, it is necessary to find out which services are running. With the netstat command, we can print information about the Linux network subsystem, including running services. This command displays the program name and the process identifier of each socket. Run the netstat command as follows:

$ Netstat-atup

Or

$ Netstat-atup | grep LISTEN

Here we will explain the meaning of each parameter:

-T: select all TCP services.

-U: select all UDP services.

-A: It indicates that all listening and non-listening sockets are displayed.

-P: displays the process identifier and the program of each socket.

In this way, we can select different parameters for different purposes to better serve us.