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

Preface through the previous study, we understand the guiding process of Linux, and how to control and optimize system services. What should I do if I want to learn more about various program information in the system, shut down unresponsive processes, and automatically execute tasks at a specified time? Next, let's learn the knowledge and techniques of process management and planned task management. First, the relationship between the program and the process program: 1. Executable code and data stored in hard drives, CDs and other media 2. Statically saved code process: 1. Program code running in CPU and memory 2. Dynamically executed code 3. Parent, child process application, process, Thread an application can contain one or more processes A process can include one or more threads (the most basic unit) Application = factory process = workshop thread = worker highly concurrent processing depends on multithreaded operation (thread thread) ps command to view static process statistics: ps auxa: displays all process information under the current terminal Including the processes of other users. When combined with the "x" option, all process information in the system is displayed. U: use a user-based format to output process information. X: displays the process information of the current user under all terminals

View static process statistics-e: displays all process information in the system. -l: displays process information in a long format. F: displays the process information in a complete format. You can view the parent process.

The meaning of the list title: USER: the name of the user account that started the process. PID: the numeric ID number of this process in the system, which is unique in the current system. TTY: indicates which terminal the process is running on. "?" Indicates that the terminal is unknown or not required. STAT: displays the current state of the process, such as S (hibernating), R (running), Z (dead),

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