Common Linux commands - cd command

Article directory

1 Introduction

cdThe command is one of the most basic and frequently used commands in Linux systems and is used to change the current working directory. It is the abbreviation of "change directory" and it is crucial for anyone using a Linux system to master this command.

2. Command parameters

cdThe basic format of the command iscd [选项] [目录]. Since thecd command itself has a single function, its parameters are relatively simple. The main parameters are as follows:

-L: Follow logical links (default option).
-P: Use physical links, i.e. do not follow symbolic links.

In addition to these parameters, cd also accepts some special characters and path formats, such as . representing the current directory, ..Represents the upper-level directory.

3. Common usage and examples

Here are some common uses of the cd command:

3.1 Basic usage

Switch to the user's home directory:
```
cd
```
or
```
cd ~
```
Switch to the last directory you were in:
```
cd -
```

3.2 Use absolute or relative paths

Change to the directory with an absolute path:
```
cd /usr/local
```
Change to a relative directory:
```
cd ../Documents
```

3.3 Use special characters

Return to the previous directory:
```
cd ..
```
Switch between the current directory and the parent directory:
```
cd .
```

3.4 Using parameters

Change to directory using-P option (ignoring soft links):
```
cd -P /path/to/link
```

4. Summary

cdThe basic function of the command is to switch the current working directory. Its use is very simple, but it is very important for daily work. By skillfully using the cd command, users can navigate efficiently within the Linux file system.