Transcription of The Unix Operating System - Drexel CCI
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The Unix Operating System - Drexel CCI
The Unix Operating SystemSE 101 Spiros MancoridisWhat is an OS?An Operating System (OS) is software that manages the resources of a computerLike most managers, the OS aims to manage its resources in a safe and efficient wayExamples of computer resources are: CPU, RAM, disk memory, printers, displays, keyboard, mouse, etcThe OS also isolates users and application programmers from the underlying computer Operating SystemsMicrosoft WindowsUnixOS ArchitectureWithout an OS, every application would have to implement some part of this software hierarchy ..UnixA popular multi-user, multi-tasking OSAttributes: stability, portability, securityCreated at Bell Labs by Dennis Ritchie and Ken Thompson (won the ACM Turing Award in 1983)Unix is considered one of the greatest achievements in computer scienceHas been around since the 1960s in various forms, , AIX, SCO Unix, SunOS, FreeBSD, OpenBSD, NetBSD, Linux, Mac OS XUnixMultiuser and MultitaskingToolbox philosophy Concise syntaxDesigned by programmers for programmers1983 ACM Turning Award (Unix)ACM is the Association for Computing MachineryWorld s largest educational and scientific computer societyYou can become a student member too ACM awards the Turing Award every year.
What is a Virtual Machine? A virtual machine (VM) is a software implementation of a computer that executes programs like a physical computer A system VM implements a complete computer that can support the execution of a real OS (e.g., vmware, KVM) A process VM is designed to run a single program (e.g., Java VM)
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