Deep understanding of Linux PS commands

Linux PS command detailed explanation

In the Linux system, the ps command is a very useful command to display the process status. Commonly used commands. Through the ps command, you can view the process information currently running on the system so that users can monitor and manage the system. This article will explain the usage of the ps command in detail and demonstrate it with specific code examples.

1. psBasic usage of the command

In the Linux terminal, enter the following command to view the process information of the current system running:

ps

This command will list all process information under the current shell, including process ID (PID), CPU usage, memory usage, etc.

2. psCommonly used options for commands

psThe command can display different process information by combining different options. The following are some commonly used options:

• -e: Display all process information
• -f: Display complete process information
• - l: Display more detailed process information
• -a: Display the processes of all users
• -u: Display the processes of the specified user Information

3. psExample of command

1. View information about all processes in the system:

ps -e

2. View the process information of the top 10 CPU occupancy:

ps -e --sort=-pcpu | head -n 11

3. View the process information of the specified user:

ps -u username

4. View detailed process information:

ps -l

4. Further use of the ps command

In addition to displaying process information, the ps command can also be used in conjunction with other commands. For example, use the grep command to filter specific process information:

ps -e | grep process_name

The above command will display information containing the process_name keyword in all processes.

Summary

ps command is one of the very important and commonly used commands in Linux systems. By combining different options and other commands, you can flexibly view and manage the system process information in . I hope this article can help you better understand and use the ps command.

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