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While attempting to install, in VS Code, the Fabric samples and binaries through the curl command :

I've encountered the following error, as soon as Fabric docker images are pulled :

The command 'docker' could not be found in this WSL1 distro. We recommend to convert this distro into 
WSL 2 and activate the WSL integration in Docker Desktop settings.

N.B: Docker version 20.10.0-beta1

Thus any relevant feedback, not impacting the usage of the IBM Blockchain Platform v.1.0.39 (e.g. prerequisites installed), would highly be appreciated.

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Answers

See the Docker Desktop WSL 2 backend guide.

Specifically, you need to convert your Ubuntu distribution to WSL2 (it is currently WSL1). To do so, see Step 6 in the Install section:

To upgrade your existing Linux distro to v2, run:

wsl.exe --set-version Ubuntu 2

Either that, or create a new WSL instance by backing up the WSL1 version (wsl --export) and then importing it into a new copy (wsl --import). See wsl --help for the parameters needed.

Then proceed with the rest of the Docker installation instructions.