---
title: Troubleshooting SSH
intro: 'When using SSH to connect and authenticate to {% data variables.product.github %}, you may need to troubleshoot unexpected issues that may arise.'
redirect_from:
  - /articles/troubleshooting-ssh
  - /github/authenticating-to-github/troubleshooting-ssh
versions:
  fpt: '*'
  ghes: '*'
  ghec: '*'
topics:
  - SSH
children:
  - /using-ssh-over-the-https-port
  - /recovering-your-ssh-key-passphrase
  - /deleted-or-missing-ssh-keys
  - /error-host-key-verification-failed
  - /error-permission-denied-publickey
  - /error-bad-file-number
  - /error-key-already-in-use
  - /error-permission-to-userrepo-denied-to-other-user
  - /error-permission-to-userrepo-denied-to-userother-repo
  - /error-agent-admitted-failure-to-sign
  - /error-ssh-add-illegal-option----apple-use-keychain
  - /error-ssl-certificate-problem-verify-that-the-ca-cert-is-ok
  - /error-unknown-key-type
  - /error-were-doing-an-ssh-key-audit
---