WSL/Manual Installation

Manually installing WSL apps allows to test unreleased beta versions

In order to install ("side load") WSL apps from outside the Microsoft store one has to follow several steps

make sure side loading is enabled
download the appx
install the signing certificate
run the appx file

Allow side loading

Go to Settings -> Update&Security -> For developers and make sure side loading is permitted:

Enable sideloading

For 20H2 version of Windows 10:

Enable sideloading

Download the appx file

Windows Apps are actually zip files with special meta data in it. The file suffix is "appx". Currently in development appx files for openSUSE are available from download.opensuse.org.

Install the certificate

Apps in the Microsoft Store are signed by a trusted certificate. Side loaded apps are signed by a developer certificate. In case of openSUSE that certificate is stored in the openSUSE build service. Conveniently the appx file has the certificate embedded, so right clicking on the appx file and following some steps allows to import the certificate as trusted:

Step 1
Step 2
Step 3
Step 4
Step 5
Step 6
Step 7
Step 8
Step 9

You may (almost assuredly, depending on the source of your .appx files) also need the "Secure Boot CA" certs for openSUSE/SUSE SLE:

"openSUSE Secure Boot CA" "SUSE Linux Enterprise Secure Boot CA"

They can be obtained from a distros "shim" package, for example:

http://download.opensuse.org/source/distribution/leap/15.3/repo/oss/src/

And installed in the same manner as described above. First, download the shim-rpm from above, then run

  rpm2cpio shim*.rpm | cpio -idmv

and copy

  ./usr/share/efi/x86_64/shim-opensuse.der

to the Windows-PC. Double-click on it, and install the cert in the Trusted root store.

Launch the appx

Just double click on the appx to make it run.

or from PowerShell:

 Add-AppxPackage .\app_name.appx

for example:

 Add-AppxPackage .\openSUSE-Leap-15.1-x64-Build7.19.appx