Soft link file 1. What is a soft link file
A soft-link file in a Linux system is similar to a shortcut in a Windows system.
hypothetical scenario: For a file, it must be stored in the/root/111/directory, but there is another
PermissionDeny permission denied View Permissionsls-aLs-la expression View permissions for something inside a folder
Classification Group of user groups: an operating system may be used by several people at the same time with convenient
Inode Records under Linux
Guide
The file is stored on the hard disk, and the minimum storage unit for the hard disk is called "Sector" (Sector). Each sector is stored 512 bytes (equivalent to 0.5KB). When the operating system
0x01 What is InodeThe file is stored on the hard disk, the minimum storage unit of the hard disk is called "Sector" (Sector), each sector is stored 512 bytes;When the operating system reads the hard disk, it does not read from one sector to the next,
Recently, the Lsync synchronization discovery is slow, so the files are synchronized through the pipeline after the script.The contents are as follows:#!/usr/bin/python import paramiko import osimport sysimport
Ll-alinux commandLS View all document namesLs-l View All CatalogsLS/ETC display the files in the ETC directoryll view the document permissions information, the last three bits are: file capacity, file date Modified, file infoll/View Document root
LS lists the files and directories in the current directory (does not show hidden files)-a lists all files and directories in the current directory-l lists details of all files and directories in the current directory except hidden files
1. To get the package, you can use wget, Ubuntu can use apt-get source to get the codewget is a simple and powerful free software that downloads on the web and supports the HTTP,HTTPS,FTP protocol.# command Format wget [Options] [URL]features :
Common commands to use the French side:1. CD:CD dir: Switch the working directory to the DIR directoryCD: Switch to the user login directoryCD-: Switch to the top level directory (two directories switch to each other)CD ~: Switch to home directoryCD
Linux Terminal Introduction
Shell prompt
Bash Shell Basic Syntax
use of BASIC commands:ls, pwd, CD
View System and BIOS Hardware Time
How Linux gets Help
Linux shutdown command: Shutdow, INIT, etc.
Linux 7 Boot levels
Http://www.cnblogs.com/peida/archive/2012/10/27/2743022.htmlThe MV command is the abbreviation for move, which can be used to move files or rename files (rename), which is a common command under Linux, often used to back up files or directories.1.
in the in Linux systems, the command used to copy files or directories is CP, which can copy the source files to the target file or complicate multiple source files to the target directory. command format:CP [ option ] Source Address (file or
Learning Environment: Cent OS 6.5file processing commands:Ls:list Display the catalog file $ls –l show details $ls –ld Show directory Permissions $ls –i Display i-node numbers represent the same inode
Installing the Linux system
Note The Linux core version of the release version.
Physically, every hard drive under Linux has a name named Hda,hdb,hdc ... Then each hard disk can be divided into 4 primary sectors, HD1,HD2,HD3,HD4, logical
One, development toolsCompiler GCCDebugging Tools GDBCode Editor Vim1. Compiling commandsgcc hello.c-o Hello # Second Hello for the newly generated executable file name-O Specify a name for the generated executable file.-wall Print all warnings.-E
First, some basic definitions1. Superblock: Record The overall information of this filesystem, including the total amount of inode/block, the amount of use, the amount of surplus, and the format and relevant information of the file system;2. Inode:
Commands that are commonly used under Mac:
LS column directoryLS parameter catalog name (parameter- W displays Chinese,-l details,-a includes hidden files )
mkdir Creating a Directory
Touch file (create file)
CP parameter file target file (
Second Speaking:1.startx entering the graphical interface2.shutdown-h now shuts down3.shutdown-r Now restart your computer4.reboot Restart your computer now5.su-Switch to system administrator status6.logout (enter at prompt) user logoff7.VI Editor
Command LN to create a connectionln-s [source file] destination fileLn-s/etc/issue/issue. SoftLs-l/etc/issue/issue. Softlrwxrwxrwx l root root 12-01 23:12/issue. Soft->/etc/issueA soft connection is equivalent to a shortcut in Windows, just a symbol
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