Linux

1. Switch Directory commands: CDroot directory in Linux:/Current directory:./Top level directory:.2. View current directory: PWD3. Switch User: Su #切换到root用户su-#切换到root用户 and switch to Root's home directory at the same timeSU User name

Linux Boot SequenceThis diagram is a complete introduction to the Linux boot sequenceBelow I will tell you in detail a boot processThe first step is to load the BIOSWhen you turn on the computer, the computer will first load the BIOS information,

SOURCE command:The source command, also known as a Point command, is a dot symbol (.). The source command is typically used to re-execute the initialization file you just modified to take effect immediately without having to log off and log back on.

server operating SystemUnixLinux:gnu/linuxWindowsLinux History Linux is Unix-likeUnix was born in 1969 Ken TompsonLinux was born in 1991 TorvaldsLinux distributions SlackwareSuse,open SuseRed HatRhel,centos,fedoraDebianUbuntuAndroidThe

LS \ View root directory fileBin: This directory holds the most frequently used commandsBoot: Some of the core files used when starting Linux, including some connection files and image filesDev: This directory is a Linux external device, access to

Linux system installation is minimal without desktop, can be installed with Yum in the command line interface1. Insert the mirror disk of the installation system2. Open Linux on the command line interface Mount CD (CD/To root directory)

Packing: It's like buying something and loading it into a tote bag.Compression: It's like filling a bag with a bag and pumping it into a vacuum.Archive command: Tar to package filesTypically used to back upTar cvf test.tar file name (suffix does not

R, W, X are normal permissions, I, a hide permissions,r=4 w=2 x=1 r=只读 w=读写 x=执行文件隐藏权限i，只能查看，不能删除，不能修改，不能追加，不能修改时间文件隐藏权限a，只能在文件的末尾追加，可以更改时间，不行写入，不能删除，不能重命名目录隐藏权限i，不能删除目录，不能修改目录的名称，但可以追加目录下边文件的内容目录隐藏权限a，可以修改目录下面的文件，但是无法删除Chown How to usechown

One: The composition of Linux system systemLinux consists of kernel and rootfs, so what is kernel and what is ROOTFS?Kernel: Operating system kernel, operating system kernel is the core part of most operating systems. Kernel for process management,

Let's review the previous section:1. Basic introduction of user and user group,uid,gid, user type (normal user, system user, root user)2. User and Group Common command id,groups,who command, add user name parameter and no user name parameter

The philosophical thinking of Linux:1. All DocumentsLinux abstracts almost all of the data and resources in the form of files, even hardware, sockets used by network communications devices, and pipelines;File: A set of streaming data in a storage

 boot loader (Boot loader) is a small program that runs before the computer loads the operating system kernel. With this applet, you can initialize the hardware device, set up a map of the memory space, and load the system's hardware and software

/etc/hosts: The corresponding analytic table of user IP and domain name/etc/sysconfig/network: Machine name, network card startup, gateway and other configuration/etc/fstab: Record boot automatically mounted file system/etc/rc.local: Boot-loaded

--force # Force overwrite　　/USR/BIN/SVN--username user--password passwd Co $Code ${svnpath}src/ # Check out the entire project /USR/BIN/SVN-- Username User--password passwd up $Code ${svnpath}src/ # Update Project

1. Upload the JDK of the corresponding system into the system.2. Select Directory (/OPT/JDK) to extract the unpacked package = = "Tar zxvf Compressed package name3. Configure Java_home (JDK installation path, same as Windows)4. Modify the path

First make sure that you have the JDK installed on your Linux and that the environment variable configuration is done in/etc/profile.Installing the Tomcat SoftwareAccess http://tomcat.apache.org/download-60.cgi Download tar.gz version[Email

1, composer Chinese network: https://www.phpcomposer.com/Laravel Chinese web: https://d.laravel-china.org/2, composer is the role is to give your project management dependencies, install PHP package, without manual, Laravel and Yii framework also

Linux Common commands (5) -- (centos7-centos6.8) JDK installation, 1. Check whether the system has OpenJDK before installing jdk: delete it if it exists. View: java-version Query OpenJDK-Related Files: rpm-qa | grep java Delete OpenJDK-Related

Linux File compression and packaging details, linux packaging details Before we talk about compression and packaging, let's talk about compression. Simply put, a file compressed by the compression software is called a compressed file. The

How to mount a hard disk automatically after ubuntu is started In linux, we often use the mount command to mount hard disk partitions or discs to the file system. /Etc/fstab is the file system automatically mounted to linux during boot. If a new