[WSL 2]Replace/update kernel?

[pascua28]

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Please fill out the below information:

• Your Windows build number: Microsoft Windows [Version 10.0.18922.1000]

• What you're doing and what's happening: I've successfully compiled the kernel from here: https://thirdpartysource.microsoft.com/download/Windows%20Subsystem%20for%20Linux%20v2/May%202019/WSLv2-Linux-Kernel-master.zip using the default config from /proc/config.gz. I used make -j4 and then sudo make install. I checked the corresponding files in /boot to ensure everything is updated.

• What's wrong / what should be happening instead: After issuing the above commands and shutting down the vm using wsl --shutdown Debian, uname -a still returns Linux Sam 4.19.43-microsoft-standard #1 SMP Mon May 20 19:35:22 UTC 2019 x86_64 GNU/Linux which means the kernel didn't get updated. I even did make -j4 bindeb-pkg to make debian packages, and after installing, still the same.

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[kdrag0n]

The WSL 2 kernel is not actually inside any of the distro containers. Instead, it's located at C:\Windows\System32\lxss\tools\kernel in Windows and owned by TrustedInstaller, which means that you will need to take ownership of the file and grant yourself the permissions necessary to modify it first.

Since this process can be daunting, I wrote a comprehensive guide for replacing the kernel, as well as some helper scripts to do the work for you: https://github.com/kdrag0n/proton_wsl2/blob/v4.19-proton/README.md#installation

[pascua28]

The WSL 2 kernel is not actually inside any of the distro containers. Instead, it's located at C:\Windows\System32\lxss\tools\kernel in Windows and owned by TrustedInstaller, which means that you will need to take ownership of the file and grant yourself the permissions necessary to modify it first.

Since this process can be daunting, I wrote a comprehensive guide for replacing the kernel, as well as some helper scripts to do the work for you: https://github.com/kdrag0n/proton_wsl2/blob/v4.19-proton/README.md#installation

Thanks for the guide. Okay, so I just realized that the kernel must be loaded first in order to mount the ext4 partition (which the /boot partition also resides). Many thanks