# Cheat Sheet #day45 - mkdir

## `mkdir` Cheatsheet

### Basic Usage

* **Create a Directory**
    
    ```bash
    mkdir directory_name
    ```
    

### Common Options

* **Create Parent Directories as Needed**
    
    ```bash
    mkdir -p /path/to/new/directory
    ```
    
* **Set Permissions for the New Directory**
    
    ```bash
    mkdir -m 755 directory_name
    ```
    
* **Display a Message for Each Created Directory**
    
    ```bash
    mkdir -v directory_name
    ```
    

### Examples

* **Create a Single Directory**
    
    ```bash
    mkdir my_directory
    ```
    
* **Create Multiple Directories**
    
    ```bash
    mkdir dir1 dir2 dir3
    ```
    
* **Create a Directory with Parent Directories**
    
    ```bash
    mkdir -p /parent/child/grandchild
    ```
    
* **Create a Directory with Specific Permissions**
    
    ```bash
    mkdir -m 700 secure_directory
    ```
    
* **Create a Directory and Print a Message**
    
    ```bash
    mkdir -v new_directory
    ```
    

### Practical Tips

* **Combining Options**
    
    ```bash
    mkdir -p -v /path/to/new_directory
    ```
    
* **Using with** `chmod` for Complex Permissions
    
    ```bash
    mkdir new_directory
    chmod 755 new_directory
    ```
    
* **Creating Directories from a List in a File**
    
    ```bash
    while IFS= read -r dir; do mkdir -p "$dir"; done < directories.txt
    ```
    

### Advanced Usage

* **Creating Directories with Variable Names in Scripts**
    
    ```bash
    for dir in dir1 dir2 dir3; do
      mkdir "$dir"
    done
    ```
    
* **Using** `mkdir` in a Pipeline
    
    ```bash
    echo "dir1\ndir2\ndir3" | xargs mkdir -p
    ```
    

### Examples with Explanations

* **Create Nested Directories with a Single Command**
    
    ```bash
    mkdir -p /home/user/projects/project1/src
    # Creates the entire path even if parent directories do not exist
    ```
    
* **Create Directories with Verbose Output**
    
    ```bash
    mkdir -v project
    # Outputs: mkdir: created directory 'project'
    ```
    
* **Create a Directory with Custom Permissions**
    
    ```bash
    mkdir -m 755 public_directory
    # Sets the directory permissions to rwxr-xr-x
    ```
    
* **Create Multiple Directories with a Script**
    
    ```bash
    for i in {1..5}; do mkdir "project_$i"; done
    # Creates directories: project_1, project_2, ..., project_5
    ```
    

### Quick Reference

* **Create a Directory**
    
    ```bash
    mkdir directory_name
    ```
    
* **Create Parent Directories as Needed**
    
    ```bash
    mkdir -p /path/to/new/directory
    ```
    
* **Set Permissions for the New Directory**
    
    ```bash
    mkdir -m 755 directory_name
    ```
    
* **Display a Message for Each Created Directory**
    
    ```bash
    mkdir -v directory_name
    ```
    
* **Create Multiple Directories at Once**
    
    ```bash
    mkdir dir1 dir2 dir3
    ```
    
* **Create Nested Directories with Verbose Output**
    
    ```bash
    mkdir -p -v /path/to/new_directory
    ```
    

This cheatsheet covers the essential commands and options for using `mkdir` effectively, from basic usage to advanced scripting and handling permissions. Adjust the commands according to your specific requirements and environment.