How to Check Windows Subsystem for Linux Version

Knowing your Windows Subsystem for Linux (WSL) version is essential for ensuring compatibility with software, troubleshooting issues, or planning upgrades. Whether you’re a developer, IT professional, or a casual user, verifying your WSL version helps you stay informed about your system’s capabilities and features. This guide will walk you through simple, step-by-step methods to check whether you’re running WSL 1 or WSL 2, and how to confirm your installed version. Before starting, ensure your Windows system is up to date, as some commands or features might depend on recent updates or specific Windows editions.

What You’ll Need

• A Windows 10 or Windows 11 PC with administrator privileges (recommended for certain commands)
• Access to the command prompt or PowerShell
• WSL installed and enabled on your system

Step-by-Step

1. Open Command Prompt or PowerShell: Click on the Start menu, type “cmd” or “PowerShell,” then right-click and select “Run as administrator” for full access, especially if you encounter permission issues.
2. Check WSL version with the wsl command: In the terminal window, type:

   wsl --list --verbose

   This command lists all installed WSL distributions along with their version numbers.

3. Interpret the output: Look for the column labeled “Version” next to each distribution. It will show either 1 or 2, indicating WSL 1 or WSL 2 respectively.
4. Optional: Check your default WSL version: To see which version new distributions will default to, run:

   wsl --set-default-version

   If it outputs “WSL 2,” your system prefers WSL 2 for new installations.

5. Verify the running kernel version (for WSL 2): For more detailed info, especially about the Linux kernel version used by WSL 2, run:

   wsl --status

   This provides details about your WSL environment, including kernel version and default version settings.

6. Check the WSL version directly from a Linux shell: Launch your Linux distribution by typing “wsl” or opening it from the Start menu. Inside the Linux shell, run:

   uname -r

   This displays the kernel version, which can hint at whether you’re on WSL 1 or 2, since WSL 2 uses a real Linux kernel.

Common Mistakes

• Running commands outside the WSL environment without understanding their scope—some commands only work in Windows command prompt or PowerShell.
• Not running the command prompt or PowerShell as administrator when needed, which can cause permission errors.
• Confusing the Linux kernel version with the WSL version; they are related but distinct concepts.
• Assuming the default version applies to all distributions without checking each one individually.

Tips

• Keep your Windows system updated to ensure compatibility with the latest WSL features.
• If you want to upgrade from WSL 1 to WSL 2, use the command:

  wsl --set-version  2

  replacing <distro name> with your distribution’s name.

• To set WSL 2 as your default for new distributions, run:

  wsl --set-default-version 2

  .

• Use the “wsl –help” command to explore additional options and learn more about managing your WSL environments.

Troubleshooting

If the commands do not work or you encounter errors, consider the following steps:

• Ensure WSL is enabled: Go to Windows Features, check “Windows Subsystem for Linux,” and restart your computer if you enable it now.
• Update to the latest Windows version: Some WSL features require recent Windows updates. Check for updates via Windows Update.
• Confirm your distribution is installed correctly: Use the Microsoft Store or the command

  wsl --list --verbose

  to verify installed distributions.

• Reinstall or reset WSL: If issues persist, you might need to uninstall and reinstall WSL or reset your Linux distributions.
• Check for known issues: Visit official Microsoft support pages or forums for recent WSL problems and solutions.

Frequently Asked Questions

1. How do I upgrade from WSL 1 to WSL 2?

First, ensure your Windows version supports WSL 2 (Windows 10 version 2004 or later). Then, run

wsl --set-version <DistroName> 2

replacing <DistroName> with your distribution’s name, which you can find with

wsl --list --verbose

.

2. Can I have both WSL 1 and WSL 2 installed on the same machine?

Yes, you can install multiple distributions and specify different WSL versions for each. Use

wsl --set-version <DistroName> 1

or

wsl --set-version <DistroName> 2

for each distribution individually.

3. How do I know if my Windows version supports WSL 2?

WSL 2 requires Windows 10 version 2004 or later (Build 19041+). Check your Windows version by typing

winver

in the Run dialog or Command Prompt.

4. What is the difference between WSL 1 and WSL 2?

WSL 1 translates Linux system calls to Windows, offering faster startup but limited compatibility. WSL 2 uses a real Linux kernel inside a lightweight VM, providing better compatibility and performance for many Linux applications.

5. How do I change the default WSL version for new distributions?

Run

wsl --set-default-version 2

to make WSL 2 the default for future installations.

6. Is WSL 2 faster than WSL 1?

Generally, yes. WSL 2 offers improved file system performance and full Linux kernel compatibility, which often results in faster execution for Linux-based tasks.

By following these steps, tips, and troubleshooting advice, you can easily determine which version of WSL is installed on your Windows system. Keeping track of your WSL environment ensures you can optimize performance, troubleshoot issues effectively, and plan for upgrades as needed, making your experience with Windows and Linux seamless and productive.

Related

• How to Change Siri Voice on iPhone 15 Easily
• How to Change Sleep Button Function in Windows 11
• How to Change Sleep Time on Windows 10: Complete Guide