What does -p mean in Linux?

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Understanding the -p Flag in Linux

The -p flag in Linux is a versatile command that allows you to specify the output file for a process. In this article, we will delve into the world of Linux commands and explore the significance of the -p flag.

What is the -p Flag?

The -p flag is a part of the ps command, which stands for "process status." It is used to specify the output file for the process information. When you run the ps command with the -p flag, it will display the process information in a specific format, which can be useful for various purposes.

How to Use the -p Flag

To use the -p flag, you need to specify the process ID (PID) of the process you want to view. Here’s a step-by-step guide:

  • Open a terminal and run the command ps -p <PID> -o <column> -ef (replace <PID> with the actual PID and <column> with the column number you want to display, e.g., ppid, cmd, uid, gid, etc.).

  • Replace <PID> with the actual PID of the process you want to view.

  • Replace <column> with the column number you want to display.

  • Replace <ef> with the format you want to use for the output (e.g., ppid, cmd, uid, gid, etc.).

Example Output

Here’s an example output of the ps -p 1234 -o ppid,cmd,uid,cmdline -ef command:



  PID TTY    STAT   Command           PID COMMAND

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello World!" 1234 bash

 1234   ?      S    /bin/bash -c "echo Hello

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