Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. A background process is a computer process that runs "behind the scenes" and without user intervention. Typical tasks for these processes include logging, system monitoring, scheduling, and user notification. On a Unix system, a background process or job can be further identified as one whose group ID differs from its terminal group ID. This type of process is unable to receive keyboard signals from and typically will not send output to its parent terminal. This more technical definition does not distinguish between whether or not the process can receive user intervention.

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