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How to upgrade from Stretch to Buster without flashing an image

How to upgrade from Stretch to Buster without flashing an image

If you want to update your system from Stretch to Buster without flashing an image this guide is right for you i.e. if you are using a RevPi Flat, Connect, Core or Compact device.

The procedure described here may cause your device to stop booting. Use with caution.

Preparation

Please make a backup of your data.

Please read the article completely and clarify open questions before you start.

Instruction

  • Update your current system

sudo apt update sudo apt dist-upgrade -y
  • Edit the following file and change all “stretch” to “buster”

sudo nano /etc/apt/sources.list
  • Once you have replaced all occurrences of “stretch” within the file you can save it by pressing CTRL + X then Y followed by ENTER.

  • Edit the following file and change all “stretch” to “buster”

sudo nano /etc/apt/sources.list.d/raspi.list
  • Once you have replaced all occurrences of “stretch” within the file you can save it by pressing CTRL + X then Y followed by ENTER.

  • Run this command to remove unnecessary packages and speed up the upgrade process

  • Now we can start the upgrade with the following command

  • If this question pops up you can confidently answer with no

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