How to flash OS if I replace the CM4 with non-eMMC version

If you want to use a Compute Module 4 without eMMC on the reTerminal, then you need to insert a micro-SD and flash the OS of your choice. Follow the steps below according to your operating system.

Step 1. Insert a micro-SD card to the computer using a micro-SD card reader connected to the computer, or by using a built-in card reader on a laptop
Step 2. Download Raspberry Pi Imager software by visiting this link

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You can choose to download for either Windows, Mac or Ubuntu

Step 3. Open Raspberry Pi Imager software

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Step 4. Press CTRL + SHIFT + X on the keyboard to open Advanced options window

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Here you can set a hostname, enable SSH, set a password, configure wifi, set locale settings and more

Step 5. Click CHOOSE OS and select your preferred OS

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You can select OS such as 64-bit Ubuntu by navigating into Other general purpose OS

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Step 6. Click CHOOSE STORAGE and select the connected micro-sd card
Step 7. Finally, click WRITE

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Please wait a few minutes until the flashing process is complete.

Step 8. Eject the micro-SD card from computer and insert it into the reTerminal.

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Note: You need to open the shell of the reTerminal to access the micro-sd card slot