Wrong usage of `wsl --install` does not give a helpful error message
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- Dominant language
- C++
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Description
Windows Build Number
10.0.21390.2025
Repro Steps
Type in any of the following commands:
wsl --install when wsl is already installed
wsl --install ubuntu
or any other misuse of wsl --install
Expected Behavior
I expect WSL to indicate that I made a syntax error.
In the specific case of wsl --install and wsl --install <distro>, more specific error messages could be printed such as WSL is already installed! Use "wsl --install -d <dist>" to install a new distribution. and Syntax error! Did you mean to run "wsl --install --distribution {the distro they typed in}"?.
Actual Behavior
WSL prints the --help output without any indication that there was a syntax error. I seriously thought that --install was just broken when I tried wsl --install ubuntu.
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reproducing wsl --install when WSL is already installed and wsl --install ubuntu, then trace the WSL CLI argument handling for --install. Done means misuse produces a syntax-specific error instead of only the --help output, including guidance for the distribution form.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- cpp
- Domain
- cli
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100