Longtime SSH Key GitHub Stopped Working: Troubleshooting
If you've been using GitHub with an SSH key and it suddenly stops working, you might see an error message like this:
git request failed with error: fatal: Could not read remote repository.This can be frustrating, but there are several steps you can take to troubleshoot and resolve the issue. In this article, we'll cover the key concepts related to SSH keys and GitHub, provide detailed context on the topic, and offer troubleshooting steps to help you get your SSH key working again.
SSH Keys and GitHub
SSH keys are a way to identify trusted computers without needing a password. They're used to securely connect to remote servers, including GitHub. When you set up an SSH key with GitHub, you can push and pull code from your repositories without having to enter your username and password every time.
If your SSH key suddenly stops working, it could be due to a number of reasons. Here are some steps you can take to troubleshoot and resolve the issue.
Step 1: Check Your SSH Key
The first step is to check that your SSH key is still valid. You can do this by running the following command:
ssh-keygen -l -f ~/.ssh/id_rsaThis will display the fingerprint of your SSH key. Make sure it matches the fingerprint you have on file with GitHub.
Step 2: Check Your SSH Agent
Next, make sure your SSH agent is running. You can check this by running the following command:
eval "$(ssh-agent -s)"If the agent is not running, start it by running the command above. Then, add your SSH key to the agent by running:
ssh-add ~/.ssh/id_rsaStep 3: Check Your Git Configuration
Make sure your Git configuration is set up to use your SSH key. You can check this by running the following command:
git config --global --listLook for the following lines:
git config --global user.name "Your Name"git config --global user.email "[email protected]"git config --global core.autocrlf inputgit config --global core.sshCommand "ssh -i ~/.ssh/id_rsa"If the last line is not present, add it by running:
git config --global core.sshCommand "ssh -i ~/.ssh/id_rsa"Step 4: Check Your Git Remote
Make sure your Git remote is set up to use SSH. You can check this by running the following command:
git remote -vLook for the following line:
origin [email protected]:yourusername/yourrepository.gitIf the URL starts with https instead of [email protected], change it to use SSH by running:
git remote set-url origin [email protected]:yourusername/yourrepository.gitStep 5: Check GitHub
If none of the above steps work, check to make sure your SSH key is still on file with GitHub. Go to your GitHub settings, then SSH and GPG keys. Make sure your SSH key is still listed.
If your SSH key is not listed, add it by clicking "New SSH key" and pasting in the contents of your public key (~/.ssh/id_rsa.pub).
If your SSH key suddenly stops working with GitHub, there are several steps you can take to troubleshoot and resolve the issue. By checking your SSH key, SSH agent, Git configuration, Git remote, and GitHub settings, you can identify and fix the problem. With your SSH key working again, you can continue to push and pull code from your GitHub repositories securely and efficiently.
References
- GitHub: Connecting to GitHub with SSH
- GitHub: Troubleshooting SSH
- Atlassian: Troubleshooting SSH issues