Linux first knowledge (commands, files)

Linux primary knowledge (command, file) file system

Under the Linux system, there is no drive disk, only one root directory/, all the files are under the root directory.

Related Folders Introduction

bin : Program-related
Boot : Boot-Start related
CDROM : Disc
Data : Dev Device related
etc : Configuration file-related
Lib : Some dependent libraries
Home : Home folder, home directory

How to use commandsLinux command format:
command [-option] [parameter].

• command name, corresponding function of the English word
• Option options, no sequencing
• Parameter parameters

View Help documentation

• Help: Typically Linux comes with information such as: Ls–help
• Man: There's a problem for men. A manual provided by Linux, which contains most of the commands, instructions for using the function

Auto-complete

TAB key Auto-complete

Historical command

History record which commands have been executed
! [Number] Execute the orders executed several times
Use arrows?? ?? View history Commands

Related catalog file commands

pwd: Current directory

ls: file in current directory

• -A show all file names
• -l Display as a list
• -h Display File size units

CD: Enter directory

Touch: Create a file to. The beginning is the hidden file

mkdir: Creating a Folder

Clear: Empty the terminal

Cat : View file content information

RM: Delete file, rm b-r Delete folder B and all files below it

• -F Force Delete
• -I executes interactively
• -R Recursively Delete the contents of the directory, you must add this parameter when deleting the folder

rmdir: Delete folder, only empty folder

wildcard character () : is a wildcard character, for example: LS-2 file with the beginning of listing

wildcard character (?) : for example: LS 2? List 2 start, followed by a file

wildcard characters [] : For example: LS 2[12345], listing 2 begins, followed by a [] file, is a regular expression

redirect

>
Example: ls > Xx.txt
The information to be displayed is written to the target file (the contents of the target file are deleted before writing)
>>
Writes the information to be displayed to the destination file, append write

Split screen Display more

For files with more text information, use more to split the screen view display
Example: Ls-alh/bin | More in the form of a list to display the files in the bin directory

Relative path and absolute path

• Relative path: Under Sibling directory
• Absolute path: Full directory path
• Cd.. /.. Top level Directory
• cd~ Home Directory

Create directory (mkdir)

To create a contiguous directory:
mkdir a/b/c/d/e-p
Tree-like display file directory structure

Linux first knowledge (commands, files)