Windows Subsystem for Linux not recognizing JAVA_HOME Environmental Variable

As Biswapriyo suggested, you should use WSLENV.

1. Open PowerShell. Then set JAVA_HOME to the path to your java installation.

2. In your case, run setx JAVA_HOME "D:\Program Files\Java\jdk-11.0.1"

You should see a message that says “SUCCESS: Specified value was saved”.

3. Then run setx WSLENV "JAVA_HOME/p".

You should see the success message again.

4. Type ‘env’ into your WSL bash prompt.

You should see JAVA_HOME correctly set at this point.

Note: If step 2 doesn’t work, you might want to changing the path to JAVA_HOME to include the \bin folder.