What does nohup mean?

The nohup command is a tool used to execute commands in the background in Unix/Linux systems. Its function is to make the command ignore the hang-up signal and the execution will not be interrupted even if the terminal is closed. Usually, nohup will redirect the command output to the nohup.out file for subsequent viewing.

nohup meaning

nohup is a command in Unix/Linux system, used to execute commands in the background or program and is not affected by terminal shutdown. The full name of nohup is "no hang up", which means not to hang up. Its function is to make the command ignore the hang up signal (SIGHUP), so that the execution process will not be interrupted by the shutdown of the terminal. Normally, the nohup command will redirect the output of the command to a file named nohup.out so that you can view the output information of the command execution later. nohup is often used for long-running tasks or tasks that need to continue after the terminal exits.

Why use nohup when performing long-term tasks?

The main reason to use nohup when executing long-term tasks is to ensure that the task is not interrupted because the terminal is closed. When you execute a command or program in the terminal, if the terminal is closed, the command or program will also terminate. This is undesirable for long-running tasks, which may last several hours or even days. Using the nohup command allows the task to run in the background and is not affected by the terminal status. Even if you close the terminal or log out, the task will still continue to execute. This ensures that long tasks can be completed smoothly without unexpected interruptions.

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