How to Fix: How to fix warning about ECDSA host key
ECDSA host key warning on Ubuntu server with password-less SSH setup.
📋 Table of Contents
The warning message you're seeing is usually caused by a mismatch between the host key on your local machine and the one stored on the remote server. This can happen when you've previously connected to the server using an older version of SSH that used a different key format.
🛑 Root Causes of the Error
- Older SSH versions used a different key format, which can cause conflicts when connecting to newer servers.
🛠️ Step-by-Step Verified Fixes
Method 1: Update SSH Client
- Step 1: Open a terminal on your local machine and run the command `ssh-keyscan -t ecdsa -v myserver` to see the host key fingerprint.
Method 2: Regenerate SSH Host Key on Remote Server
- Step 1: Log in to your remote server and run the command `ssh-keygen -t ecdsa -f ~/.ssh/host_key` to regenerate the host key.
✨ Wrapping Up
To resolve the warning, you can try updating your SSH client or regenerating the host key on your remote server. If you're still experiencing issues, you may need to investigate further to determine the root cause of the problem.
❓ Frequently Asked Questions
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