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How to Run Commands in the Background on Linux – Guide
all commands up up to this point they have been played in the foreground. When you run a command in the foreground, the shell waits until it finishes before displaying another prompt, and you can continue. When running a command in the background, you don’t have to wait for the command to finish before running another command.
A job is another name for a process that runs a pipeline (which can be a simple command). You can have only one job in the foreground on a screen, but you can have many jobs running in the background. If you are doing more than one job at the same time, take advantage of one of the features: multitasking. Running a command in the background can be useful if the command runs for a long time and doesn’t need to be monitored. This keeps the screen free so you can use it for other work.
To run a command in the background, insert an ampersand (&; a control operator) immediately before the RETURN which ends the command line. The shell assigns a small number to the job and displays that job number in parentheses. After the job number, the shell displays the process identification number (PID) – a larger number assigned by the operating system. Each of these numbers identifies the command running in the background. The shell displays another prompt and you can enter another command. When the background job completes, the shell displays a message that includes the job number and the command line that was used to execute the command.
How to Start a Linux process or command in the background
Keep Linux processes running after exiting the terminal
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