Best Fixes
Use verbose SSH output to confirm which key was offered and whether the intended key is loaded and configured.
Check server-side authorized_keys contents and the permissions of the `.ssh` directory and files.
Error Fix
How to Fix 'Permission denied' When Using a Key
A generic SSH key troubleshooting path when access fails but the server is reachable.
If SSH reaches the host but rejects key-based access, the issue is usually key selection, agent state, authorized_keys configuration, or permissions on the server side.
Avoid This
Do not spam new keys into the server without understanding which client identity should be used.
Do not ignore file-permission problems on the server that cause SSH to reject valid-looking keys.
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