Linux Device driver Third article: How to write a simple character device driver?

In the Linux device driver first: Introduction to the device driver briefly describes the character driver, this article briefly describes how to write a simple character device driver. This article draws on the source code in the LDD, realizes a

Linux Device driver Third article: How to implement simple character device driver

In the Linux device driver first: Introduction to the device driver briefly describes the character driver, this article briefly describes how to write a simple character device driver. This article draws on the source code in the LDD, realizes a

Linux Device driver Third article: write a simple character device driver

In the Linux device driver first: Introduction to the device driver briefly describes the character driver, this article briefly describes how to write a simple character device driver. This article draws on the source code in the LDD, realizes a

Linux commonly used commands, learn the time to remember the commonly used to save convenient later use O (∩_∩) o haha

Service httpd Restart restart ApacheService mysqld Restart restart MySQL[-] [RWX] [R-x] [r--]1 234 567 890421 421 421CHGRP: Change the file group example: CHGRP root (user group) testing (directory)Chown: Change File owner example: chown cent (user)

Linux kernel Source-code Scenario Analysis-wait (), schedule ()

The parent process executes WAIT4 and calls schedule to switch to the child process:WAIT4 (child, NULL, 0, NULL);Like any other system call, the WAIT4 () entry in the kernel is SYS_WAIT4 (), and the code is as follows:Asmlinkage Long SYS_WAIT4

Linux Kernel source code scenario analysis-Mandatory scheduling

The mandatory scheduling of processes in the Linux kernel, i.e. involuntary, passive, and stripped-down scheduling, is mainly caused by time. As mentioned earlier, this scheduling occurs on the eve of a break, an exception, a system call returning

The linux command argument list is too long and the find usage

1. When deleting a large batch of files in a directory, when using RM-RF or RM * will prompt the parameter list too long by modifying the command to: Find. -name "*" | Xargs rm-rf ' * ', successfully deleted 2, need to put a directory of all files

"Reprint" What are the time-saving tips that every Linux user should know

There are netizens in the question and answer site Quora asked: "What are the time-saving skills, every Linux user should know?" "Joshua Levy usually works on the Linux platform, and he has accumulated a lot of practical command-line skills, and he

In-depth understanding of Linux network Technology insider-interrupts and network drivers

Notifies the driver when a frame is receivedin a network environment, when a device (network card) receives a data frame, it needs to notify the driver to process it. There are several notification mechanisms:Polling :The kernel keeps checking to

Hard links and soft links under Linux

"Hard Link"A hard link is a link through an index node, too complex to see the operation.Hard-Link creation[[email protected] ~]# mkdir-p/test/oldboy/Create a directory oldboy/[[email protected] ~]# cd/test/oldboy/switch to this directory[email

Analysis of block device drivers in Linux

based on the Sbull program in the Linux device driver book to Linux Block device driver summary analysis.Start by understanding the core data structures in this block device:struct Sbull_dev {int size; /* Device Size in sectors */U8 *data; /* The

Linux Learning One

Shutdown-h now shut down immediately.Shutdown-r now restartsReboot now restartSu-If you are currently a normal user, enter this command to switch to the administrator user (root), and if you want to switch to another user, typeSu-user name such as:

Installing the SVN method under Linux centos6.5

These days have been building svn, online search for a lot of information, no one is complete, so I have to organize a copy of the installation manual, recorded, the first is to make a note to yourself, the second is to give you a reference.The

Linux sed replacement (full line replacement, partial replacement), delete deleted, add added, select

Sed is a good file processing tool, itself is a pipe command, mainly in the behavior of the unit processing, you can replace the data rows, delete, add, select and other specific work, the following first understand the use of SEDThe SED command

The difference between hard links and soft links in Linux

1. The hard link file and the original file point to the same data, the two are like clones, the inode number is the same, when the original file is deleted, The hard-link file still exists in effect. But a hard-link file differs from a file's

How many questions can you answer about Linux? --Answer 1~13 question

Can 1.memcmp be used to compare structures? The difference between strcmp and memcpy?Reference: http://www.cnblogs.com/cxz2009/archive/2010/11/11/1875125.html[Email protected]:/study/linuxknowledge# cat memcmptest.c#include #include #include

Description of the Linux awk command

I. AWK descriptionAwk is a programming language that is used to process text and data under Linux/unix. Data can come from standard input, one or more files, or the output of other commands. It supports advanced functions such as user-defined

Linux---10-20

A detailed description of Linux file attributes:[Email protected] robin]# Ls-ihl/home/robin/test.txt398606-rw-r--r--. 1 root root 2315 Mar 21:00/home/test.txtThe columns correspond to the following explanations:Inode node Number file type

CPU Analysis of Linux concepts

Http://ilinuxkernel.com/?cat=4Linux CPU Utilization principle and accuracy analysis1 CPU Usage Calculation principleUnder Linux/unix, CPU utilization is divided into user state, System State and idle state, which indicate the time that the CPU is in

The difference between Windows sockets and Linux socket programming ZZ

Socket related programs to be aware of from Windows porting to Linux:1) header FileUnder Windows Winsock.h/winsock2.hLinux under Sys/socket.hError handling: Errno.h2) InitializationNeed to use WSAStartup under WindowsNot required under Linux3) Close

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