`cd`

The cd (change directory) command is used to navigate between directories in a Linux filesystem.

Basic Usage

Syntax:
```
cd [directory]
```
Examples:
```
cd /home/user/documents
```
- Changes the current directory to /home/user/documents.
```
cd ..
```
- Moves up one directory level (to the parent directory).
```
cd ~
```
- Changes to the home directory of the current user.
```
cd -
```
- Switches to the previous directory you were in.
```
cd /
```
- Changes to the root directory.

Options

The cd command itself doesn’t have options, but it works with special characters:

. (dot):
- Refers to the current directory.
```
cd .
```
- No change in directory; stays in the current directory.
.. (double dot):
- Refers to the parent directory.
```
cd ..
```
- Moves to the parent directory.
~ (tilde):
- Represents the home directory of the current user.
```
cd ~
```
- Moves to the home directory.
- (dash):
- Switches to the previous directory.
```
cd -
```

Quick Tips

No Argument (cd):
- Running cd without any arguments takes you directly to your home directory:
```
cd
```
Absolute vs. Relative Path:
- You can use absolute paths (starting from /) or relative paths (starting from the current directory) with cd.
```
cd /usr/local/bin   # Absolute path
cd ../bin           # Relative path
```