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Category: Os Theory

The main functions of the operating system are resource management, program control and human-computer interaction. The resources of a computer system can be divided into two categories: equipment resources and information resources. Device resources refer to the hardware devices that make up the computer, such as the central processing unit, main memory, disk storage, printers, tape storage, monitors, keyboard input devices, and mice. Information resources refer to various data stored in the computer, such as files, program libraries, knowledge bases, system software and application software, etc.

One way command to achieve a CPU usage 100%

for i in `seq 1 $(cat /proc/cpuinfo |grep “physical id” |wc -l)`; do dd if=/dev/zero of=/dev/null & done

Description:

cat /proc/cpuinfo |grep “physical id” | wc- l The number of CPUs ca

October 17, 2021By Simo Os Theory 100%, CPU, Implementation, occupation, one line, order, rateLeave a Comment

How to check the current operating system is Windows, Linux or OSX?

I am writing a compiler project that will generate assembly code as the target language. However, depending on the operating system, there are some small changes that need to be considered, and I a

October 17, 2021By Simo Os Theory Current, How to check, linux, Operating System, or OSX, windowsLeave a Comment

Operating system – debugging environment

1. Debugging system constructionA. The system construction requires a piece of other virtual machine software, here is Bochs
Bochs–it is an x86 hardware Open source simulator of the platform. It c

October 17, 2021By Simo Os Theory construction, debugging, environment, Operating SystemLeave a Comment

How to download the PIP package of different operating systems?

I want to download the pip package so that later I can install it on a different machine (using a different operating system). But the –download option will download the current operating system sp

October 17, 2021By Simo Os Theory Different, How to download, Operating System, package, PIPLeave a Comment

Operating system LAB2 experiment summary –Part2

1. Page table self-mapping I didn’t make lab2-2-Extra, and later found out that it was actually the original problem of the theory class, and even I did it. After reflecting on it, I have passed th

October 17, 2021By Simo Os Theory experiment, LAB, LAB2, Operating System, Part2, SummaryLeave a Comment

Missing CRC32 () when building libzip on OSX 10.9

I have downloaded the latest version of libzip, and am currently trying to build it on OSX and fail:

Linking C shared library libzip.dylib
Undefined symbols for architecture x86_64:
“_crc32”

October 17, 2021By Simo Os Theory 10.9, construction, CRC, CRC32, libzip, missing, OSX, timeLeave a Comment

LAB_0 operating system experiment preparation (full)

I. Introduction to the experiment

Experimental purpose:

knowledge reserve:

span>

2. Related downloads

1. Download the mirror file

This image file is of VDI type,

October 17, 2021By Simo Os Theory all, experiment, LAB, Operating System, preparationLeave a Comment

Check and determine the CRC algorithm from the data CRC – embedded application.

I have a set of data protected by a 16-bit checksum and I need to correct it. The checksum locations are known, the exact area where they are calculated and the exact algorithm used to calculate th

October 17, 2021By Simo Os Theory Algorithm, application, check, CRC, data, determination, embedding, program, styleLeave a Comment

Can API hooks in the API do not do it?

In the world of penetration testing with Python, it looks like
one must usually hook into operating system-specific APIs. This makes sense
right In my case, because we are dealing with different ar

October 17, 2021By Simo Os Theory API, can, Hook, independent, Medium, Operating SystemLeave a Comment

[Knowledge Strengthening Chapter 1] Operating System Overview 1.1 The Basic Concept of Operating System

< em>The boundary between the user and the operating system has some connected parts, and the application and the operating system will also have some connected parts.

The operating system is

October 17, 2021By Simo Os Theory 1.1, basic concept, Knowledge enhancement first chapter, Operating System, OutlineLeave a Comment

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