PuTTY Pageant SSH key authentication failures: diagnostic guide
Diagnose PuTTY publickey failures with Pageant: check agent state, loaded keys, session auth settings, and server logs.
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sshPermission denied (publickey): SSH diagnostic guide for key rejection
A practical diagnostic guide for SSH Permission denied (publickey) errors, with a cause-to-symptom table, ordered client and server checks, permission and ownership fixes, and escalation criteria.