Plan9 Operating System

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It was developed as the research successor to Unix by the Computing Sciences Research Center at Bell Labs between the mid-1980s and 2002. Plan 9 replaced Unix at Bell Labs as the organization's primary platform for research and explores several changes to the original Unix model that improve the experience of using and programming the system, notably in distributed multi-user environments. Plan 9 from Bell Labs is a distributed operating system. One of the key features adopted from

Unix was the use of the file system to access resources. Plan 9 is an operating system , system kernel but also a collection of accompanying software. The bulk of the software is predominantly new, written for Plan 9 rather than ported from Unix or other systems. The window compilers , file server, and network services are all freshly written for Plan 9. Plan 9 is most notable for representing all system interfaces, including those required for networking and the user-interface, through the file system rather than specialized intrfaces. Plan 9 aims to provide users with a workstation-independent working environment through the use of the 9P protocols. Plan 9 continues to be used and developed in some circles as a research operating system and by hobbyists.

File Systems in Plan 9

  1. Key Ideas of Plan 9

  2. Organization of File Systems
  3. The 9P Protocol
  4. The File Server
  5. Unusual File Servers
  6. Characteristics of Files
  7. File Caching
  8. File Permissions

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