December 14, 2019
Amitraj
Design Principles in Linux OS
-> Linux is a multi-user, multi-tasking system with a full set of
UNIX-compatible tools.
-> The Linux file system follows the traditional UNIX semantics, and the UNIX standard network model is implemented as a whole. The internal characteristics of Linux design have been influenced by the history of the development of this operating system.
-> Main design goals are speed, efficiency, and standardization.
-> As a result of the development of PC technology, the Linux kernel is also becoming more complete in implementing UNIX functions. Fast and efficient are important design goals, but lately the concentration of Linux development has focused more on the third design goal, standardization.
The POSIX standard consists of a collection of specifications from different aspects of operating system behavior. There are POSIX documents for ordinary operating system functions and for extensions such as processes for threads and real-time operations. Linux is designed to fit the relevant POSIX documents; there are at least two Linux distributions that have received POSIX official certification.
-> Because Linux provides a standard interface to programmers and users, Linux does not make many surprises to anyone who is familiar with UNIX.
But the Linux programming interface refers to the UNIX SVR4 semantics rather than BSD behavior. A different collection of libraries is available to implement the BSD semantics in places where the two behaviors are very different.
-> There are many other standards in the UNIX world, but Linux’s full certification of other UNIX standards sometimes becomes slow because it is more often available at a certain price (not freely), and there is a price to pay if it involves certification of approval or compatibility of an operating system with most standards .
Supporting broad applications is important for all operating systems so that the implementation of the standard is the main goal of developing Linux even though its implementation is not formally valid. In addition to the POSIX standard, Linux currently supports POSIX thread extensions and subsets of extensions for POSIX real-time process control.
-> Linux is a multi-user, multi-tasking system with a full set of
UNIX-compatible tools.
-> The Linux file system follows the traditional UNIX semantics, and the UNIX standard network model is implemented as a whole. The internal characteristics of Linux design have been influenced by the history of the development of this operating system.
-> Main design goals are speed, efficiency, and standardization.
-> As a result of the development of PC technology, the Linux kernel is also becoming more complete in implementing UNIX functions. Fast and efficient are important design goals, but lately the concentration of Linux development has focused more on the third design goal, standardization.
The POSIX standard consists of a collection of specifications from different aspects of operating system behavior. There are POSIX documents for ordinary operating system functions and for extensions such as processes for threads and real-time operations. Linux is designed to fit the relevant POSIX documents; there are at least two Linux distributions that have received POSIX official certification.
-> Because Linux provides a standard interface to programmers and users, Linux does not make many surprises to anyone who is familiar with UNIX.
But the Linux programming interface refers to the UNIX SVR4 semantics rather than BSD behavior. A different collection of libraries is available to implement the BSD semantics in places where the two behaviors are very different.
-> There are many other standards in the UNIX world, but Linux’s full certification of other UNIX standards sometimes becomes slow because it is more often available at a certain price (not freely), and there is a price to pay if it involves certification of approval or compatibility of an operating system with most standards .
Supporting broad applications is important for all operating systems so that the implementation of the standard is the main goal of developing Linux even though its implementation is not formally valid. In addition to the POSIX standard, Linux currently supports POSIX thread extensions and subsets of extensions for POSIX real-time process control.
