design of unix operating system

at noon, change the time from. At this time, the system will not back up important system files. Unfortunately, due to unexpected damage to the system hard disk or other system faults on the morning of the next day, the damaged files cannot be repaired due to the previous day's absence of normal backup. Changing the

1 , UNIX It is one of the first operating systems to become mature; C Language UNIX The system appears, UNIX The system is highly portable and suitable for multiple hardware platforms. You can even

In the middle of the 60, Att Bell Labs joined a project to develop an operating system called Multics with General Electric and the MIT Mac engineering team. Multics's main design goal is to provide many users with the ability to support large-scale concurrent access to the computer, to support sufficient data storage capabilities, and to allow users to easily sh

tasks. However, in the operating system, you can simply send a command to the operating system to execute such a task. The operating system has included the design of repeated operatio

development mechanisms, and user customization mechanisms. 17. Expansion principle: design focuses on the future, and the future is always faster than expected A protocol or text format should be sufficiently self-descriptive for extension. The design code is well organized to allow future developers to add new features without the need to demolish or recreate the entire architecture.

) Representative: MIT MULTICS (multiplexed information and computer Service) The core is still a task switch , but the idea of resource reuse has a great impact on the operating system, and virtual memory is a kind of reuse From Multics to Unix (1980-1990)Miniaturization of Computers appeared, PDP-1 $120,000 per unit, less than 7094 of 5% Mo

Thanks to the well-known stability and reliability of UNIX operating systems, a large proportion of the operating systems used to provide various Internet services are UNIX and UNIX operating systems, therefore, a large number of

Article Title: Killing processes that do not discipline Unix operating systems. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. I wrote the following in linux.chinaitlab.com/administer/780117.html "target = _ blank>Properly ma

point in time only one process access to resources, such as memory resources access: for the entire memory resources are parallel access, However, it is mutually exclusive access for a memory unit of the smallest granularity in memory.Virtualization (leveraging multi-channel program design techniques to make each user (process/program) feel that the computer is acting as if it were a separate service)Async (The execution of the program is not consist

Elk cloner: the first computer virus. It will get all the stuff on your disk, and it will even penetrate into the chip. This is Cloner! It will stick you like glue, and it will modify the memory! DX}Computer viruses are the most famous member of a large number of electronic destructive techniques. They are actually some very dangerous malicious programs, they are ugly, but in my opinion they are cute, derived from my control of the Internet and exploration of computer programs. They will copy th

From the development of the UNIX operating system, it can be known that there are variations and versions between UNIX systems. As UNIX is being used by a growing number of businesses and governments, the need for a unified standard for