lsof

How to View Open Ports in a Linux System

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How to View Open Ports in a Linux System

1. 1. Use the netstat command to view • Basic syntax：<span>netstat -tuln</span>。 • Here, the <span>-t</span> option indicates that only TCP protocol-related port information will be displayed; the <span>-u</span> option is used to show UDP protocol-related ports; the <span>-l</span> option indicates that only ports in the listening state will be listed, which are ports waiting … Read more

In-Depth Analysis of the Linux lsof Command: Easily Identify Open Files in the System

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In-Depth Analysis of the Linux lsof Command: Easily Identify Open Files in the System

Abstract: It is a command-line utility used to list information about files opened by various processes. In Linux, everything is a file (pipes, sockets, directories, devices, etc.). Therefore, by using lsof, you can obtain information about any open file. lsof stands for ‘list open files’. If you think of the lsof command as ‘ls + … Read more