Shulou(Shulou.com)06/03 Report--

First, we open the Linux command interface to view the port, as shown in the figure:

To gain higher privileges (see all ports), switch root login here

The first method is to use the lsof command, for example 80, as shown in the figure:

If there is no output, the port number is not open.

To facilitate the test, I detect an open port number here, and the information shown in the figure will be output:

The second method is to use the netstat -aptn command line to see all open port numbers

The command shown in the figure is to view all port numbers using udp protocol in the system.

This command is to view port number information using tcp protocol in the system

The above is how to check whether the port is open in linux details, more please pay attention to other related articles!

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