D-SP-Ch1g-Process_Management

Program and Process

Program

An executable file in the disk

Process

• An executing instance of a program with an unique process
• ps - report current processes
• top - display processes

CPU Scheduling

Concept

• The process of deciding which process should occupy the resource
• Every core can only execute one process at a time
• User can change a process priority

Multitasking

Multitasking

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UNIX Process

Shell

D-SP-Ch1gb-Shell_Process