introduction to linux

The source code that Linux uses to support various architectures consists of about 4,500 C language programs, which are stored in about 270 subdirectories, totaling approximately 2 million lines of code, and occupy about 58MB of disk

All of the following commands are valid under Linux/unix's shell, which is dominated by bash. In case of discrepancies, take your own server as the subject. Linux referred to herein is mainly referred to as Rhel/centos.Ctrl + a switches to the

What user groups?A collection of users with some common characteristics. The user group profile mainly has/etc/group and/etc/gshadow, where/etc/gshadow is the/etc/group encrypted information file.Note : Although users under the same user group have

Linux Operating System BasicsThe Linux operating system was developed in a cathedral-style and market-style way, when people were dissatisfied with the practice of monopoly charging of the UNIX operating system in commercial companies, so people

Terminal Equipment: TerminalMulti-tasking, multi-userPhysical terminal, console: ConsoleVirtual Terminals: 6, TTYCTRL+ALT+F[1-6]Graphics Terminal:CentOS 6:Ctrl+alt+f7CentOS 7:In which virtual terminal is launched, which is located in which virtual

1, what is misc equipment?Misc is the abbreviation of English, the Chinese name is generally called miscellaneous equipment/stray equipment.We know that most of the equipment has a clear classification class, some equipment to classify the not very

The relationship between eth0 eth0:1 and eth0.1 corresponds to the relationship between the physical network card, the sub-network card, and the virtual VLAN NIC:Physical network card : Physical network card here refers to the actual network

The file system is a very basic knowledge of Linux, but also a prerequisite for learning Linux.This article will stand in a higher view to understand the Linux file system, mainly including the Linux disk partition and directory, Mount fundamentals,

Introduction to Linux major distributions1. Red Hat LinuxRed hat is a relatively mature version of Linux, both in terms of sales and installed capacity is considerable. This version supports Intel, Alpha, and SPARC hardware platforms from 4.0, and

Linux and File system introduction 1 Internet Industry StatusIn the server-side market: Super computer The November 2014 data shows that 485 systems in the top 500 systems are running Linux

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Introduction to Linux CD commandsCD:CD DirectoryCD Path Open pathsCd.. Return to Parent DirectoryEcho $PWD records the current pathEcho $OLDPWD records the previous pathCD. Current directoryCD Back home directoryCD ~username into the specified

We have mentioned in the previous S U i d and g u i d. This privilege bit has become a tricky issue in recent years. Many system vendors do not allow this bit to be implemented, or even if it is set, it completely ignores its existence because it

Transferred from: http://www.cnblogs.com/yyyyy5101/articles/1901842.htmlThe file system is a very basic knowledge of Linux, but also a prerequisite for learning Linux.This article will stand in a higher view to understand the Linux file system,

I. SummaryThis article mainly introduces the concepts of Linux kernel modules and the simple module development process. Mainly from the module development of common directives, kernel module program structure, module usage count and module

Introduction to Linux Cluster file systemThe cluster file system has perfected the database cluster function of Oracle RAC in many aspects. Here is a comparison of them.Typically, a cluster is just a set of servers (PCs or workstations) that run as

Introduction to Linux environment variables Environment variables: The bash shell uses an attribute called "Environment variable (environment variables)" To store information about the shell session and the working environment, which allows you to

In recent years, the INIT process of Linux system has undergone two major evolution, the traditional sysinit has gradually faded out of the historical stage, the new upstart and Systemd have their own characteristics, A growing number of Linux

What is a shell?ShellIs the user interface of the system, which provides an interface between the user and the kernel for interactive operation. At the same time, the shell is a command interpreter that interprets the commands entered by the user

File permissions2. File permissionsFile permissions are defined primarily for three types of objectsOwner: Master, uGroup: Genus, GOther: Others, OEach file has three permissions defined for each type of visitorR:readableW:writableX:excutableFile:R: