design of unix operating system

own careful transformation and then back to the Linux community, and then the development of a step-by-step completion of the complete Linux system, as for the Linus Torvalds is the initiator of this group. Thanks to this collective effort, Linus Torvalds Linux as the GNU licensing model for the same benefit!Linux is Linus Torvalds influenced by Minix. But in the design philosophy, Linux and Minix big phas

Real-time operating system real-time operating system operating system, referred to as RTOS. 1. Real-time operating system definition of rea

SCO OpenServer 5.0.5, as a highly efficient and stable multi-user operating system with high security performance, has been widely used in finance, insurance and telecommunication departments. In the daily maintenance work of the system, some system faults are encountered sometimes. The author of the common 10 question

The security risks of Unix systems are analyzed as follows: Security risks of operating system architecture This is the root cause of computer system vulnerability. For example, many versions of Unix systems are developed using patches. Hackers can also use these patches. In

IntroductionProcess synchronization is an operating system level concept, in the context of multi-channel programs, there are different constraints, in order to coordinate this mutual restrictive relationship, the realization of resource sharing and process collaboration, so as to avoid conflicts between processes, the introduction of process synchronization.Critical ResourcesIn the

Using the Ucos real-time operating system is at school when the Mentor research project. At that time, the Internet to find the operating system porting tutorial and application tutorial according to gourd painting scoop, the function of implementation is just, not very deep to study this thing. Later work, idle to bor

Mike Gancarz is a technical preacher. He is one of Linux/unix's leading advocates and the first to develop the X Window system. He summed up some of the philosophical ideas of word-of-mouth in the Unix/linux community, and wrote a complete book of Unix/linux Philosophical Theory, "Linux and the UNIX philosophy." In his

IPC's design intent.Unix IPC Some are famous, some are nameless, to the specific use of the time to know, if the nameless IPC (typically pipe), must be dependent on the process, but the well-known IPC (typically FIFOs), can be used in two non-dependent processes (dependence can be manifested in, One process is a child of another process).Posix IPCPOSIX's full name is "portable Operating

◆ Security risks of operating system architecture This is the root cause of computer system vulnerability. For example, many versions of Unix systems are developed using patches. Hackers can also use these patches. In addition, operating

I. INTRODUCTION Unix system, as a powerful multi-user time-sharing operating system, has been applied in more and more occasions, and the requirements of UNIX system management are more and more, but the current Books on

. Even after the crash, you can continue to deal with it 日志 . Microsoft NTFS , ext3 and the ReiserFS file system are all with logs. 4.3.7 Virtual file system (translation is too bad to see the end)Different file systems are used, even under the same operating system under the same computer.WindowsWin

when necessary. After the purpose is completed, you must clear the account in time and use a non-standard guest account name. Do not use "guest "; do not use account names such as "fixomni" or "oratmp. The Guest account should have a strong password and limited processing procedures. If appropriate, a strong umask such as 077 should be given to the Guest account. User Account User accounts should not be shared and should be cleared after the termination of the term. Logon with well-known accou

is beautiful" and sold millions of cars; or think about the example of sun, a mainstream UNIX vendor. Its business strategy is based on the idea of "bringing the best fist product to all resources", or in other words, that is, the idea of "only do one thing well. So, are people interested in handheld computers, wireless network access, and handheld Videos related to portability? For the operating

thread.See the articles you shared before your quick lesson:Graphics description of process and threadThe difference between a process and a thread3. Process communication in several ways.As an example of a Linux operating system (window is similar), the process of communication between Linux is as follows:1 pipes and well-known pipelines (namedpipe): Pipelines can be used for communication between affinit

other aspects, which makes it not a simple task to port applications from Unix to Linux. Of course, training is the key to solving this problem. For example, Red Hat is a Red Hat certified engineer (RHCE, according to 51CTO's previous report, this is one of the most popular IT certifications in the world and has considerable value for Linux System Administrators) we have prepared a Rapid Track class traini

system, at the same time, the characteristics of the Linux/Unix design are summarized. These features will be noticed during Linux usage, but may not be summarized. 1. "small is beautiful ". That is, the KISS principle. It can be simple, not complex or so-called advanced. It can only meet the needs of 90% of people. 2. Create a prototype as soon as possible. You

Unix SystemIn, some programs use the systemRootProcess running. These programs do not always have suid permission, because many of them only run by the root, the system administrator needs to know what these programs are doing and what other programs these programs will run. (1) Start the system When some unix systems

machines, it will take a second on programmers. 14. Generation Principle: Avoid manual hack and write programs to generate programs as much as possible. 15. Optimization Principle: you must first have the original type before carving, and learn to go before running. 16. Principles of diversity: never believe in the so-called "no two methods" assertions. 17. Expansion principle: design focuses on the future, and the future is always faster than expect

of the backup and save it to a safe place to maintain data integrity. C. intrusion analysis Now you can review the log file and system configuration file to check the clues of intrusion, the system modification by intruders, and the vulnerability of system configuration. 1. check for system software and configuration

When using Javascript to implement interaction between the client and the server, you sometimes need to judge the operating system to achieve compatibility under different operating systems. For example, we have a website, in Windows XP, the browsing effect is good, but in Ubuntu, due to many different features, it may cause slight differences in browsing, and ev