Use nohup and & to improve process control efficiency

In recent years, with the continuous development of information technology, most work is inseparable from the help of computers. During computer operation, we often encounter situations where multiple processes need to be run at the same time, and improving process control efficiency is very critical. This article will introduce how to use the nohup and & commands in Linux systems to improve process control efficiency.

1. Understand the nohup and & commands

In the Linux system, nohup is a command used to ignore the hang signal. It can make the command run in the background. Even if the user exits the terminal, it will not Will affect the execution of the command. And & is the symbol used to put the command into the background for execution.

2. Use the nohup command

When you need to perform a task in the background that may take a long time, you can use the nohup command. For example, if we need to back up a larger folder in a Linux system, we can use nohup like this:

nohup tar -cvf backup.tar /path/to/folder &

In this way, the backup task will run in the background, and even if we exit the terminal, it will not affect the backup process. . You can use the command ps -ef | grep tar to view the progress of the backup task.

3. Combined with the & command

In addition to the nohup command, we can also use it in conjunction with the & command to improve process control efficiency. For example, if we need to run multiple commands at the same time, we can use &:

command1 & command2 & command3 &

. In this way, the three commands will run in the background at the same time without blocking each other, which improves efficiency. At the same time, you can use the jobs command to view the tasks currently running in the background.

4. Notes

When using the nohup and & commands, you need to pay attention to the following points: First, make sure that the command does not generate interactive input and output when running in the background, otherwise it may Unexpected problems may occur; secondly, the output information of the command needs to be handled carefully. The output information can be redirected to a specific file to avoid generating a large amount of output on the terminal.

Conclusion

By rationally using the nohup and & commands, we can improve the efficiency of process control and allow the computer to efficiently run various tasks in the background. At the same time, we must also pay attention to the reasonable planning of the execution sequence of tasks and the processing of output information to ensure the stability and security of the system. I hope this article will be helpful to readers in improving process control efficiency in their daily work.

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