# Basic introduction to linux series -- Chapter 1 basic use of common linux commands

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# Basic use of common linux commands

## 01. Reasons for learning Linux terminal commands

• When Linux was first introduced, there was no graphical interface, and all operations were completed by commands, such asDisk operationFile accessDirectory operationProcess managementfile rightSetting, etc
• In the workplace, a large number ofServer maintenanceAll inlong-rangePassSSH clientThere is no graphical interface. All maintenance work needs to be completed through commands
• In the workplace, as a back-end programmer, you must more or less master some terminal commands commonly used in Linux
• There are about 200 commands in the Linux distribution, but there are only more than 10 commonly used commands

Learn the skills of terminal command:

• There is no need to memorize. If you use more common commands, you will remember them naturally
• Don't try to learn all commands at once. Some commands are very uncommon. If you encounter them temporarily, you can use Baidu temporarily

## 02. Basic use of common linux commands

Serial numbercommandCorresponding Englisheffect
01lslistView the contents of the current folder
02pwdprint work directoryView current folder
03CD [directory name]change directorySwitch folders
04Touch [file name]touchIf the file does not exist, create a new file
05MKDIR [directory name]make directoryCreate directory
06RM [file name]removeDeletes the specified file name
07clearclearClear screen

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• ctrl + shift + = enlargeFont display of terminal window
• ctrl + - narrowFont display of terminal window

### 03. Automatic completion

• Knocking outfilecataloguecommandAfter the first few letters of, presstabKey
• If there is no ambiguity in the input, the system will complete it automatically
• If there are otherfilecataloguecommand, click againtabKey, the system will prompt for possible commands

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• PressupperlowerThe cursor keys can switch back and forth between commands that have been used
• If you want to exit the selection and do not want to execute the currently selected command, you can pressctrl + c

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