Linux

Dynamically passes the physical address and size of the kernel space to user space. This article also demonstrates two common methods that can be used for communication between kernel space and user space: Proc file system and Mmap shared memory.The

File descriptor: A non-negative integer that is the index of the kernel Open file table. Each process has its own file descriptor, the kernel maintains an open file table, a different descriptor points to the kernel File open table, and points to

We studied the character device structure Cdev Linux character device driver Development (i)--character device drive structure (upper) below continue to learn several important data structures of character devices. First look at the following

Refer to the blog of the struggling people in Beijing, URL: https://blog.csdn.net/u012453843/article/details/69803244 xx.sh scripts written under Windows, such as notepad++, after being passed on to UNIX or Linux servers, and then run scripts that

SPI is a "serial peripheral Interface" abbreviation, is a four-wire synchronous serial communication interface, used to connect microcontrollers, sensors, storage devices, SPI equipment divided into the main equipment and two from the device, the

What is Linux network programming Network programming is the writing of such programs that communicate with other programs through a computer network. One of the biggest differences between web programs and ordinary programs is that the Web program

Linux is an open source, free operating system, its stability, security, processing concurrency has been recognized by the industry, many medium-sized, large and even mega-projects are using Linux. Linux kernel: redhat, Red Flag Linux, Ubuntu, SuSE,

In a Linux system, there are times when ordinary users can't do something, unless it's a root user. Then you need to use the SU command to temporarily switch to the root identity to do things. su:substitute[' sʌbstɪtjuːt] instead of user The SU

Linux kernel has a very powerful function is to dynamically load the module, the module in this case is actually a kernel-supported applet. Before we actually get into the Linux kernel world, we can go through an addiction and load a kernel module

A non-relational databaseNon-relational databases are NoSQL, relational databases represent MySQLFor the relational database, it is necessary to store the data in the library, table, row, field, query the time according to the conditions of a line

FTP ServiceFile Transfer ProtocolFtpfile Transfer Protocol One of the early three application-level protocolsBased on C/s structureDual-channel protocol: Data and command connectionsData transfer format: binary (default) and textTwo modes: Server

UseThe mkdir command is primarily used to create a directoryFull NameThe full name of the mkdir is: Make DirectoryParameters-M: Configuration file permissions-P: help you to directly set up the desired directory recursivelyCaseGo to

This is mainly about files, directories, and some disk-related knowledge. The main basis is the 4th chapter of the operating system document management (reference: kingly book) and bird's private cuisine of the No. 567 chapter.When the system is

In the Linux general-purpose I/O model,I/OThe Action series function (System call) is expanded around an integer called a file descriptor. This begs the question: what does this integer mean? Does a value represent a file? Just pass an integer in

The first step: Find the damaged file and its installation package, install the fix. Before repairing, make clear that your corrupted files belong to that package, which can be viewed on a server with the same version that works.Well know what the

Original Author Address: https://www.cnblogs.com/chenshoubiao/p/4793487.htmlRecently learning Linux for simple commands have mastered but the complex script shell Python still does not grasp this need to continue to learn ...A lot of things just

In order to simplify the SSH process, the use of the certificate method, the SSH login to avoid the need to enter the account password process, the specific operation is as follows:One, on the machine where the SSH server1. Log in as root, change

Turn from: 52524732Find a detailed description of smb.conf from the Internet: Service Name: SMB Configuration directory:/etc/sabma/ Master configuration file:/etc/sabma/smb.conf The global settings of the #======================

File configuration:1,/etc/ssh/sshd_configSSH configuration file2,/etc/shadowPassword file3,/etc/sudoersAuthorizing users to manage files4,/etc/issueSystem Information file, can be deleted5,/etc/issue.netRemote Login welcome information needs to be

In the actual use of the shell, there are programming experience is easy to get started, but a little more difficult is the shell of those symbols, a variety of special symbols in the shell script we write if we can use good, often can give us a