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How to Use ssh-copy-id on Windows with WSL
Table of Contents
Introduction
When I needed to set up SSH public key authentication from Windows to Ubuntu for my research, I found that the ssh-copy-id command wasn’t available natively. This guide shows how to use ssh-copy-id through WSL to register your public key on a server.
Prerequisites
- WSL is installed on Windows
- You can reach the server with
ssh user@host
Steps
1. Launch WSL
wslRun the following commands inside WSL.
2. Prepare SSH Keys
mkdir -p ~/.ssh
chmod 700 ~/.sshCreate a New Key
ssh-keygen -t ed25519 -f ~/.ssh/key- Private key:
~/.ssh/key - Public key:
~/.ssh/key.pub
Use an Existing Windows Key
Copy your Windows SSH key to WSL:
cp /mnt/c/Users/YourUsername/.ssh/id_ed25519 ~/.ssh/key
cp /mnt/c/Users/YourUsername/.ssh/id_ed25519.pub ~/.ssh/key.pub
chmod 600 ~/.ssh/keyReplace
/mnt/c/Users/YourUsername/with your actual Windows home directory. Adjust the key filename as needed.
3. Register Public Key on Server
ssh-copy-id -i ~/.ssh/key.pub user@hostYou’ll be prompted for a password on the first connection.
4. Verify Connection
ssh -i ~/.ssh/key user@hostIf you can connect without a password, you’re done.
Related Articles
To skip the
-ioption every time, set up SSH config.
How to Set Up SSH Config
How to Use ssh-copy-id on Windows with WSL
https://naonao-na.com/en/posts/ssh-copy-id-windows/