operating system questions and answers

, try restore and image repair. 4. Command prompt A command prompt is a patent for a master who knows this way. Here, the author will be an example of the form to show this issue, so that you are also among the experts list. (1) Cheat out of the window interface Instance requirements: Installation of Windows 7 has been unable to start, try a variety of repair measures are invalid, had to reload the system, how can I back up the user files? In this

algorithm parameters, how to improve the algorithm, finally can write some part of the code, and replace the corresponding modules of ROS (such as their own writing kinematics inverse solution instead of KDL, etc.).To do research, communication is very important. If you improve a ROS algorithm, it's best to communicate with the original author of the package, merge your changes into the original project, and improve the level of your package with the communication. Of course, if you have

Smart Home System Architecture Based on the Internet of Things operating system hellm Smart Home is a branch application of IOT and a huge IT market space widely recognized. There are already many products or solutions for smart families on the market. However, unlike the mobile Internet, smart families have not yet formed a complete ecosystem. The reason is that

Dedicated to beginners: How to learn Linux operating systemFirst, choose the appropriate Linux distributionWhen it comes to Linux distributions, there are too many, and maybe no one can give an accurate number, but one thing is thatLinux is becoming more and more prevalent and facing so many Linux distributions, Beginners who intend to switch from other systems to Linux can be confused, even if loyal Linux users do not have the time and effort to test

file, the user can implicitly move the files on the storage into memory. But the operating system also moves data from memory back to memory. At the bottom of the hierarchy, an administrator explicitly moves data between tape and disk.Moved something? Typically, the block size at the top of the structure is smaller than the bottom. In the memory cache, the block size is usually 128B. The In-memory page may

. This book has your credit. I would like to thank all my friends from the perspective of Bowen, Miss Guo for his understanding and support, Li Ling for her hard work, and Jiang Li and Li Bing for your high efficiency. I would also like to thank teacher Meng Yan for your encouragement. I would like to thank Guo Hongqiao, my best friend, not only for your technical help, but also for your spiritual support. I would like to thank my colleague and friend Zhang huichang for their technical breadth a

months. Because of the frequent version updates, performance and stability are not guaranteed, it is generally not recommended to use Fedora Core on the server.As a matter of fact, Fedora is an experimental version of Red Hat Enterprise Linux, which is the basis for the release of Red Hat Enterprise Edition by testing users.3. Red Hat Enterprise LinuxRed Hat Enterprise Linux (abbreviated to rhel,red Hat's corporate edition). Red hat is now primarily a server version of Linux development, with a

the parameters correctly, change it to subtraction to get the new address. I think it is not difficult to analyze the specific situation. The best way to understand the stack is to do the apue lab 2 bomb ~ I wish you good luck in advance :) Questions about display color output: Observe the cga_putc function, The system checks whether the 8-bit or above of C is 0. If yes, the printed characters are dis

Introduction | Recovery 1. What is System Recovery? With Windows XP system Recovery, users (system administrators and owners) can restore a machine to a previous state when they encounter problems. The system Recovery feature automatically monitors system file changes and ch

very easy: Examination You are only allowed to answer your questions. Suppose you want to read others' papers or even If you modify the content on others' examination papers, you will "Perform Illegal Operations". It must be "disabled" by invigilators" (The premise is that invigilators work normally, otherwise they will be messed up, with very serious consequences ). Note: In Windows, the system shuts down

1 m space. Real virtual storage management It is much more complex and clever. It enables different processes to run in different address spaces (that is Make each process think that it occupies all the storage space and can be used as needed without having to care about How other processes use buckets. This is like running different processes on different computers) And consider the optimal memory usage efficiency. Q: What happens if a process accesses a storage unit that is not in its own a

applications installed by the local administrator may also have separate subdirectories for each application ). After "main" is installed, this directory may be empty. Contents in this directory should exist after the operating system is re-installed or upgraded./Usr/local/bin may be a small application installed by the user, which is connected with symbols of some large applications in the/usr/local direc

Overview This article discusses how to query the TCP/IP protocol stack of a host to collect valuable information. FirstFirst, I enumerated several "classic" operating system identification methods outside the stack fingerprint. And thenI described the "process status" of the stack fingerprint tool. Next, let the remote host leak itsSome techniques of information. Finally detailing my implementation (NMAP),

content of a thread table may include: SS/PC, general register group, and LDT. Therefore, when switching threads in the same process, you only need to switch the SS/PC, general register group, and LDT. The context switch of the so-called thread has a lower cost than the process .) Then, how does the operating system obtain the CPU execution right when a process is running? After all, the process does not t

flour into batter Lay the batter on the pan Put the pan on the stove. ② Code Error (Bugs): What are the errors in the code that are known? In this step, I'll keep track of the code errors and some of the things I tried to fix. In the early days of the project, I wasted all my time on the possible solutions for repeated attempts and frequently encountered the same code errors. The code errors and fixes generated by frequent tracing can save me a significant portion of my time in the

driver 2. Questions and Answers 2.1. Which commands can be received by the hard drive. What kind of processing results. Hard drives can accept many commands (both hardware-defined and system-independent). Here, we use the IDENTIFY Device command, explained below: Reference manual: At Attachment with packet Interface document p113:the IDENTIFY device command enab

How to determine the number of digits of the operating system without sizeof As shown in a post on the Forum Http://topic.csdn.net/u/20110926/14/3cf3149d-6715-471d-9105-933d55e9c9ad.html There is a solution: # Include However, it is said that the 64-bit system does not work. No 64-bit system is used fo

number of parallel workers is not proportional to the system efficiency. On the surface, increasing the number of parallel workers can improve the system efficiency. However, the number of parallel workers is not proportional to the system efficiency, because the number of parallel channels depends on the resources configured by the

I would like to recommend a Linux operating system that is very useful to everyone, for example, to let everyone know about the Linux operating system, and then to give a comprehensive introduction to the Linux operating system, I

I. Installation steps for the Solaris operating system 1 Put the Solaris boot CD into the optical drive and boot the computer from the CD drive; 2, wait for a moment, the console screen appears the installation interface. 3. The installation of the operating system is completed step by step, according to the instruc