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The Wayback Machine - https://web.archive.org/web/20220703095255/https://docs.github.com/en/enterprise-server@3.2/authentication/troubleshooting-ssh
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GitHub Docs
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Authentication
Account security
Authentication to GitHub
Create a strong password
Update access credentials
Create a PAT
Reviewing your SSH keys
Deploy keys
Authorizing OAuth Apps
Authorizing GitHub Apps
Authorized integrations
Third-party applications
Review OAuth apps
Token expiration
Security log
Remove sensitive data
Sudo mode
Unauthorized access
Secure your account with 2FA
About 2FA
Configure 2FA
Configure 2FA recovery
Access GitHub with 2FA
Recover an account with 2FA
Disable 2FA
Connect with SSH
About SSH
Check for existing SSH key
Generate new SSH key
Add a new SSH key
Test your SSH connection
SSH key passphrases
Troubleshooting SSH
Recover SSH key passphrase
Permission denied (publickey)
Error: Bad file number
Error: Key already in use
Permission denied other-user
Permission denied other-repo
Agent failure to sign
ssh-add: illegal option -- K
Error: Unknown key type
SSH key audit
Verify commit signatures
Commit signature verification
Existing GPG keys
Generating a new GPG key
Add a new GPG key
Tell Git your signing key
Associate email with GPG key
Signing commits
Signing tags
Troubleshoot verification
Check verification status
Update expired GPG key
Use verified email in GPG key
Authentication
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Troubleshooting SSH
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Troubleshooting SSH
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English
English
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Troubleshooting SSH
When using SSH to connect and authenticate to GitHub Enterprise Server, you may need to troubleshoot unexpected issues that may arise.
Recovering your SSH key passphrase
Error: Permission denied (publickey)
Error: Bad file number
Error: Key already in use
Error: Permission to user/repo denied to other-user
Error: Permission to user/repo denied to user/other-repo
Error: Agent admitted failure to sign
Error: ssh-add: illegal option -- K
Error: Unknown key type
Error: We're doing an SSH key audit
