There are times when the scope of a task is simple and direct enough to forego the use of any user interface at all; in fact, it may even be undesirable and distracting to do so. Such tasks are often relegated to running in the background, quietly doing their work and contributing to some aspect of the overall system with no user intervention. Such a background process has been traditionally used in Unix and Unix-like operating systems, and is commonly known as a daemon.
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