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HomeComputer TutorialsComputer KnowledgeLearn the basic usage of nohup command

NOHUP command is a very useful tool in Linux/Unix systems. It can run instructions in the background of the system. Even if the user exits or disconnects from the terminal, the program can continue to execute. This article will introduce the basic usage of the NOHUP command and its application in daily work.

NOHUP command is the abbreviation of "no hang up", which means "no hang up" in English. Its main function is to run a command and let it continue to run in the background to avoid being affected by the terminal shutdown. Using this command can ensure that the program runs in the background, and the program will not terminate even if the user exits the current terminal.

The basic syntax of the NOHUP command is:

nohup command &

Among them, command represents the command or script to be executed, and the & symbol represents running the command in the background. The following will demonstrate the basic usage of the NOHUP command based on actual cases.

First, suppose we have a script file script.sh that needs to run for a long time. We can use the following command to run it in the background:

nohup ./script.sh &

After executing the above command, the script file script .sh will continue to run in the background and will not be affected by closing the terminal. You can use the following command to view the task:

ps aux | grep script.sh

By viewing the process list, we can confirm that the script file is running in the background.

In addition to running tasks in the background, the NOHUP command can also redirect the output of the program to a specified file to avoid outputting a large amount of information in the terminal. For example, the following command redirects the output of the script file script.sh to the output.log file:

nohup ./script.sh > output.log &

By viewing the output.log file, we can view the output information of the script in real time without disturbing the current Terminal operation.

In addition, the NOHUP command can also be used in conjunction with the scheduled tasks of the operating system to implement scheduled tasks and continue to run in the background. By placing the task in the NOHUP command, we can ensure that the task continues to execute even if the terminal is closed.

To sum up, the NOHUP command is a very practical tool that can help us manage background tasks in daily work and ensure the continuous running of tasks. By mastering the basic usage of the NOHUP command, we can handle long-running tasks more efficiently and improve work efficiency. I hope this article will be helpful for everyone to learn the NOHUP command.

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