Introduction

Before using a Raspberry Pi 4, you need to install an operating system on a bootable storage device, usually a microSD card. The easiest and safest method is to use Raspberry Pi Imager, the official tool provided by Raspberry Pi.

Raspberry Pi Imager allows you to select the Raspberry Pi model, choose the operating system, select the memory card, and configure important settings before the first boot. These settings include the username, password, Wi-Fi network, country, timezone, keyboard layout, and SSH access.

1. Required Hardware and Software

Before starting, prepare the following components:

2. Download Raspberry Pi Imager

Go to the official Raspberry Pi software page and download Raspberry Pi Imager for your computer operating system. It is available for Windows, macOS, and Linux.

Install Raspberry Pi Imager on Windows

1. Download the Windows installer from the official page.
2. Open the downloaded file.
3. Follow the installation steps.
4. Launch Raspberry Pi Imager from the Start Menu.

Install Raspberry Pi Imager on Linux

On Debian-based systems, you can install it from the terminal if it is available in your repository:

sudo apt update
```

sudo apt install rpi-imager -y

Install Raspberry Pi Imager on macOS

1. Download the macOS version from the official page.
2. Open the downloaded file.
3. Drag Raspberry Pi Imager to the Applications folder.
4. Open it from Applications.

3. Insert the microSD Card

Insert the microSD card into your computer using a card reader. Make sure your computer detects the card correctly.

4. Open Raspberry Pi Imager

Open Raspberry Pi Imager. You will usually see three main options:

• Choose Device: select your Raspberry Pi model.
• Choose OS: select the operating system to install.
• Choose Storage: select the microSD card.

5. Choose the Raspberry Pi Device

Click Choose Device, then select:

Selecting the correct board helps Raspberry Pi Imager recommend compatible operating systems.

6. Choose the Operating System

Click Choose OS. For most users, the recommended option is:

7. Choose the Storage Device

Click Choose Storage, then select your microSD card.

8. Configure Advanced OS Settings

Before writing the operating system, click Next. Raspberry Pi Imager may ask if you want to apply OS customization settings. Choose Edit Settings or open the settings menu if available.

These settings are very important because they allow you to prepare the Raspberry Pi before the first boot.

Recommended General Settings

Recommended Services Settings

9. Write the Operating System to the microSD Card

After selecting the device, OS, storage, and configuration settings, click Write or Next.

Raspberry Pi Imager will:

• Download the selected operating system if needed.
• Erase the microSD card.
• Write the OS image to the card.
• Verify that the image was written correctly.

When the process finishes, Raspberry Pi Imager will show a success message. You can then safely remove the microSD card from your computer.

10. Insert the microSD Card into the Raspberry Pi 4

Make sure the Raspberry Pi is powered off. Insert the prepared microSD card into the microSD slot of the Raspberry Pi 4.

Then connect:

• USB-C power supply
• Ethernet cable if using wired network
• HDMI screen if using desktop mode
• Keyboard and mouse if needed

11. First Boot

Power on the Raspberry Pi 4. The first boot may take a little longer than normal because Raspberry Pi OS expands the filesystem and applies your configuration.

After the first boot, your Raspberry Pi should connect to your network automatically if Wi-Fi or Ethernet was configured correctly.

12. Find the Raspberry Pi IP Address

To connect to your Raspberry Pi by SSH, you need its IP address. You can find it using one of these methods:

Method 1: Check Your Router

Open your router admin page and look for connected devices. Search for the hostname you configured, for example raspberrypi or pi4-server.

Method 2: Use ping with Hostname

ping raspberrypi.local

Method 3: Scan Your Local Network

On Linux, you can use:

ip neigh

13. Connect to Raspberry Pi Using SSH

If SSH was enabled in Raspberry Pi Imager, you can connect from your computer using:

ssh mourad@raspberrypi.local

Or using the IP address:

ssh mourad@192.168.1.104

Replace 192.168.1.104 with the real IP address of your Raspberry Pi.

14. Update Raspberry Pi OS After Installation

After logging in for the first time, update the system packages.

sudo apt update
```

sudo apt full-upgrade -y

After the update, reboot the Raspberry Pi:

sudo reboot

15. Optional: Open Raspberry Pi Configuration Tool

You can use raspi-config to configure system options after installation.

sudo raspi-config

Useful options include:

• Enable or disable SSH
• Change hostname
• Configure Wi-Fi country
• Set timezone
• Enable interfaces such as I2C, SPI, Serial, or Camera
• Expand filesystem if needed

16. Optional: Enable Interfaces for IoT Projects

If you plan to use your Raspberry Pi 4 for IoT, sensors, LoRa, MQTT, or serial communication, you may need to enable hardware interfaces.

Open the configuration tool:

sudo raspi-config

Then go to:

Interface Options → Enable SSH / SPI / I2C / Serial

17. Recommended Basic Security After Installation

After installing Raspberry Pi OS, apply these basic security steps:

• Use a strong password.
• Keep the system updated.
• Disable services you do not use.
• Use SSH keys instead of password login for better security.
• Do not expose SSH directly to the internet without protection.

You can check your current username with:

whoami

You can check the hostname with:

hostname

18. Troubleshooting Common Problems

Problem 1: Raspberry Pi Does Not Boot

• Check that the microSD card was written successfully.
• Use a good-quality power supply.
• Try another microSD card.
• Make sure you selected Raspberry Pi 4 in Raspberry Pi Imager.

Problem 2: Cannot Connect by SSH

• Make sure SSH was enabled in Raspberry Pi Imager.
• Check that the Raspberry Pi is connected to the same network as your computer.
• Check the IP address from your router.
• Try using the IP address instead of raspberrypi.local.

ssh mourad@192.168.1.104

Problem 3: Wi-Fi Does Not Connect

• Check the SSID and Wi-Fi password.
• Make sure the wireless country is correct.
• Try Ethernet first, then fix Wi-Fi from the terminal.

Problem 4: Wrong Keyboard Layout

Open the configuration tool and change the keyboard layout:

sudo raspi-config

Official Links

Use the official Raspberry Pi website to download Raspberry Pi Imager and read the official documentation:

• Raspberry Pi Imager Official Download Page
• Raspberry Pi Getting Started Documentation
• Raspberry Pi OS Documentation