How to check the process in linux

Linux can view the process by using the ps command, using the top command, using the htop command, using the pgrep command and using the pidof command. Detailed introduction: 1. Use the ps command to display detailed information about the processes currently running in the system; 2. Use the top command to display real-time information about the processes running in the system; 3. Use the htop command to provide more The functions and information are better than the top command; 4. Using the pgrep command, you can find the PID of the process based on the name or other attributes of the process.

Linux is an open source operating system widely used in servers and embedded devices. In a Linux system, a process is an instance of a program that is running in the operating system. Process management is an important task in Linux systems, which allows users to view and control processes running in the system. This article will introduce how to view processes in Linux systems.

In Linux systems, there are many ways to view processes. The following are some commonly used methods:

1. Use the ps command: The ps command is one of the most commonly used commands to view processes in Linux systems. It can display detailed information about the processes currently running in the system. You can use the following command to view information about all processes:

ps -ef

This command will display the PID (process ID), PPID (parent process ID), CPU usage, memory usage and other information of the process.

2. Use the top command: The top command is a real-time system monitor that can display real-time information about processes running in the system. The top command can be started using the following command:

top

The top command will display a list of processes running on the system, sorted by CPU usage. You can use the arrow keys on your keyboard to scroll through the list, and use other commands on your keyboard to control the behavior of the top command.

3. Use htop command: htop command is an interactive process viewer, which provides more functions and information than top command. You can use the following command to install the htop command:

sudo apt-get install htop

After the installation is complete, you can use the following command to start the htop command:

htop

The htop command will display a list of processes running in the system, by CPU Sort by usage. You can use the arrow keys on your keyboard to scroll through the list, and use other commands on your keyboard to control the behavior of the htop command.

4. Use the pgrep command: The pgrep command can find the PID of the process based on the name or other attributes of the process. You can use the following command to find the PID of a specific process:

pgrep <进程名称>

For example, to find the PID of a process named "apache2", you can use the following command:

pgrep apache2

This command will return the same as " The PID associated with the apache2" process.

5. Use the pidof command: The pidof command can find the PID of the process based on the name of the process. You can use the following command to find the PID of a specific process:

pidof <进程名称>

For example, to find the PID of a process named "apache2", you can use the following command:

pidof apache2

This command will return the same as " The PID associated with the apache2" process.

To sum up, the Linux system provides a variety of methods to view processes. The ps command can display the detailed information of the process, the top command and the htop command can monitor the processes running in the system in real time, and the pgrep command and the pidof command can find the PID of the process based on the name of the process. Based on actual needs, choose a suitable method to view the process.

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