In-depth analysis of Linux PS command

Title: To understand the Linux PS command in depth, specific code examples are required

In the Linux operating system, the PS (Process Status) command is used to view the current system process Common commands for status. Through the PS command, we can view the process information running in the system, including the PID of the process, occupied resources, running time, etc. This article will introduce the usage of PS command in depth and demonstrate its function through specific code examples.

1. Basic usage of PS command

The basic usage of PS command is as follows:

1. View detailed information of all processes in the current system:

   ps -ef

2. Only display the process information of the current user:

   ps u

3. View the detailed information of the specified process:

   ps -p <PID>

   Among them,

2. Common options of PS command

1. -e: Display all processes in the system, including processes of other users.
2. -f: Display complete process information, including UID, PID, PPID, etc. of the process.
3. -u: Display detailed information of the process, including CPU usage, memory usage, etc.
4. -p: Display process information of the specified PID.

3. Example demonstration of PS command

1. View detailed information of all processes in the system:

   ps -ef

   Run the above command, it will be displayed Detailed information about all processes in the system. Each row represents a process, including UID, PID, PPID, CPU usage, memory usage and other information.

2. Display only the process information of the current user:

   ps u

   This command will display all process information of the current user, including commands, CPU usage, memory usage, etc.

3. View the detailed information of the specified process:

   ps -p 1234

   The above command will display the detailed information of the process with PID 1234, including commands, CPU usage, memory usage, etc.

Through the above examples, we can have a deeper understanding of the usage and functions of the Linux PS command, so as to better manage the processes in the system. Hope this article is helpful to you.

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