Authentication problem with key authentication

To resolve an error like,

 "Failed to connect to SFTP: Error: offering public key failed, access denied, authentications that can continue: ...." or similar, do this:

  1. Ensure that whatever the public key content you pasted in authorized_keys is same 'byte by byte' that you paste in Monyog's public key field.
  2. Ensure that you are trying with the same username. This is a common mistake to add keys for one user's authorized_keys and trying to connect with another user.
  3. The authorized_keys file should have permission 600. That is, read/write permission only to the owner.
  4. Finally, ensure that the keys are standard OpenSSH keys not any proprietary or application-specific format.

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