types of operating system

One, process synchronizationWhat is synchronization? Synchronization means that a task waits for another execution to continue without executing at the same time. As we all know, the process is asynchronous and this nature can cause confusion in the operating system. Process synchronization, which refers to the management of the order of execution between processes, is to resolve this confusion of process a

The main target of hacker attacks is the user terminal. If the intrusion detection system cannot work well with the operating system kernel, there will be more and better products, which is also a permanent cure. There are three mainstream Intrusion Detection Methods Generally, intrusion detection systems are divided into three

Basic article: Operating system, computer network, design modeOne: Operating system1. What is the status of the process, the state transition diagram, and the event that caused the conversion.2. The difference between a process and a thread.3. Process communication in several ways.4. Thread synchronization in several ways. (Must write producer, consumer problem,

Recovery monitors only a set of core system files and certain types of application files (such as files with a suffix of exe or DLL), records the state of those files prior to the change, and the backup utility backs up the user's personal data files to ensure that a secure copy is stored on a local disk or other media. System recovery does not monitor or recove

. After more than a year, Linux1.0 came out in 1994. Linus Toralds announced at this year's Linuxworld professional conference that Linux could be upgraded to version 2.4.x in the middle of this year. We know that Linux is evolving over the Internet, basically, there is a new version every few months. It is very difficult to locate the current version because the third digit changes too quickly. Let's look at 2.4.x. What does it mean? Linux versions are more complex than other software versions.

Sender: McCartney (coolcat), email zone: Unix Mailing site: BBS shuimu Tsinghua station (Sun May 17 16:31:05 1998) 4. Operating System Programming This chapter discusses how multi-thread programming interacts with the operating system and how the operating

over the Internet and is changing with each passing day, basically, there is a new version every few months, especially when the third digit changes too fast, so it is difficult to locate the current version. We just saw 2.4.x. What does it mean?　 　Linux versions are more complex than other software versions. They are divided into two types: kernel version and distribution (distribution ). The latest kernel version is 2.2.x: The most common version i

How to Learn operating system principles I have learned about computer technology and have some opinions on how to learn the operating system principles. Now I want to help you! How to Learn the operating system, first of all, ho

Article Title: Analysis and Comparison of four real-time operating system features. 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. This article analyzes and compares the features of the four Real-time

1. What is a processProcess is a computer program on a data set on a running activity, the system is the basic unit of resource allocation and scheduling, is the basis of the operating system structure. It is not just the code of the program, it also includes the current activity, which is shown by the value of the program counter and the contents of the processi

Turn from 558029841. Why do I need a thread?The first question to answer is why the operating system requires a thread. If you have to say why you need a thread, it's better to say why there are other processes in the process. Other mini-processes included in these processes are threads. The process has the following drawbacks:1, the process can only do one thing in a single time (executing a program execut

Summary This paper introduces the methods and steps of using Darwin Streaming server to realize VOD system under Linux. A brief introduction of Darwin Darwin Streaming Server is a opensource version of Apple's QuickTime streaming server, which is based entirely on QuickTime Stream server code, and realizes a mechanism to propagate QuickTime flow on the network. Darwin has some of the following features: 1. with Web management interface; 2. Open s

. 2. Directly decrypt the Oracle login key that is encrypted in TNS please refer to An Huaqin and database Security Lab for the article "See Recruit, Break Oracle password". 3. Through buffer overflow, the Oracle local operating system CONTROL permission is obtained when Oracle invokes the abnormal TNS parameter.This article will specifically describe mode 3, which exploits a buffer vulnerability on TNS to

users. In this regard, UNIX has a unique advantage, of course, Windows Server 2003 and the new version of the Linux kernel has greatly improved the reliability of the operating system. Microsoft is in the realm of client operating system with ease of use, at the same time, it has the advantage of the network

sector of the boot disk (this sector has a block of 512 bytes), which is called the boot record.==========ram File System ===============Ramfs is part of the boot image, fully resident memory, and contains many programs that allow the boot to continue. The init process running in the Ram file system is actually an SSH (simple shell) program, This program to control the

The operating system can be classified according to different methods. For example, the number of users can be divided into single-user and multi-user systems. Based on the hardware scale on which the operating system depends, it can be divided into mainframe, middleware, minicomputer and minicomputer

Introduction There is no software written by humans. It is so important that its appearance has profoundly affected the entire process.ProgramIt can be said that the history of an operating system represents the development track of the program world to a great extent. Essentially, an operating system is no differe

the hardware devices change greatly, we cannot continue using Windows XP unless we can contact Microsoft and reactivate it. The purchase of brand machines is different. General brand machines are pre-installed with the OEM version of Windows XP operating system before leaving the factory, and have been successfully activated. The system activation of this versio

Compared with Java Virtual Machine? Directly run Python code without the need for the operating system Josh Triplett started his speech on PyCon 2015 with a "Smile": porting Python to free him from operating the system: he and his Intel colleagues asked the interpreter to run on the GRUB boot program, BIOS, or EFI