Linux

Common ways of Linux IPCWriting Linux Server-side programs will inevitably involve inter-process communication IPC. Communication is bound to accompany the synchronization mechanism, the following are some common communication and synchronization

Target: Build bridge Virtual Bridge, ETH virtual network card, TUNTAP interface device under Linux. Send messages via ping, using the TUNTAP user application for sending and receiving messages.Environment: The test environment is VMware, UBUNTU14.1.

1. Command name: mkdir2. Purpose: Create a directory at the specified location3. Usage:mkdir [OPTION] ... Directory ..., which is the mkdir parameter catalog path4. Parameters:-M,--mode=mode: Set permissions in chmod mode instead of rwxrwxrwx minus

The Linux Find command searches the directory structure for files and performs the specified actions. The Find command provides quite a few look-up conditions and is powerful. Because find has powerful features, it has a lot of options, most of

Because I majored in electronics, so probably last year, I also do not know Linux a bit, I always thought that the operating system is windows, writing programs should be used vs that IDE. So, when I first came into Linux, I was extremely

1 Modify Permissionscommand: chmod (change mode)function: Change the file read and write and execute permissions. Signed method and octal number method. option: (1) Symbol method:command format: chmod {u|g|o|a}{+|-|=}{r|w|x} filenameu (user)

Calculate Linux system memory utilization correctlyFor the operating system, buffers and cached are already used (Mem: this line)memfree=total-used314952=24946552-24631600For the application (corresponding to the-/+ Buffers/cache line)

Many times we need to implement functions, macro definitions, external variables and other jump queries between multiple source programs, and even sometimes need to be in the kernel or library source code to peep their true colors, which for the

UseraddThe Linux system is a multi-user operating system, but only a super Admin user is created when the system is installed. The Useradd command is used to create a user, which is only available to the system Superuser root by default.1.useradd

Part I: Booting the kernel (in-core booting)Part II: Running INIT and system initializationThe init program needs to read the configuration file/etc/inittab. Inittab is a non-executable text file that consists of several lines of instructions.This

Network Configuration and ManagementContention for the underlying shared channel 使用 mac地址（Media Access Control)Csma/cd 以太网 载波侦听多路访问/冲突回位Token Pring 令牌环 Hub 集线器Conflict domain: All collections that can collide on the underlying device

Introduction to Samba overview skip this and start setting up Samba services.1. Installing SambaYum Install-y Samba Samba-client2. Edit the Samba configuration fileFirst share a directory, anyone can access, do not need to enter a password, complete

The first part: computer1, the five major components of computer hardware:(1) Input unit: including keyboard, mouse, scanner, handwriting board and so on.(2) Central processing unit (CPU): Contains arithmetic logic, control, memory and other units.(3

Name: pwdPurpose: Print user's current/working directoryUsage: pwd [option]Parameters:-L Output Connection path when,--logical directory connection link-p,--physical Output Physical PathTest 1:[Email protected] home]# pwd/homeTest 2:Create a soft

Hard links and soft links for Linuxhttp://www.ibm.com/developerworks/cn/linux/l-cn-hardandsymb-links/If an inode number corresponds to more than one file name, the files are called hard links. The soft link itself is a special file with the file

linux system is not enough to use, what to do? Are we 1510 re-installed linux system? Of course not, we can clone the other linux using the virtual machine cloning function above System, reducing the time it takes to reinstall lnux . Cloning the

File Service-Vsftpd, service vsftpd File Transfer Protocol (FTP ): The file protocol that allows users to upload and download files on the Internet. The FTP service is a host that supports the FTP Transfer Protocol. To complete file transfer, the

Build a Samba Shared Server in Linux Lab requirements: Configure and access the Samba file sharing service, and configure the Access Users and corresponding permissions. Tips: Create the shared directory/test and/share, and create the file tf1 (read-

CentOS 6.5 install the OSA monitoring Wizard to monitor the host OSA monitoring is a free and easy-to-use open-source graphical monitor. You must configure the PHP environment before installation,   yum install httpd mysql mysql-server

Compile bash to implement syslogs of history1. Compile BASH to implement bash's syslog logging function 1. this article will use the bash software to implement the history Logging Function to syslog logs, and this method can be used to realize