XK0-005 Question #1312: Real Exam Question with Answer & Explanation

Question

A systems administrator is attempting to access a server by SSH. The Linux administrator ensures that the SSH keys on the remote server were unable to connect. The following error message is being displayed: Which of the following needs to be changed on order for the administrator to access the server via SSH?

Options

• APassword
• BSSL
• CSELinux
• DOpenSSH

Explanation

The error message 'Authentication failure' when attempting to SSH indicates that the provided credentials, specifically the password or private key passphrase, are incorrect.

Common mistakes.

• B. SSL (Secure Sockets Layer) is related to secure communication protocols, but an 'Authentication failure' typically points to incorrect login credentials rather than an SSL configuration issue.
• C. SELinux (Security-Enhanced Linux) is a security mechanism that could restrict access, but its errors usually manifest as 'Permission denied' or similar messages, not 'Authentication failure' specifically related to credentials.
• D. OpenSSH is the software itself; while misconfiguration could lead to issues, an 'Authentication failure' error message points directly to incorrect credentials, not a problem with the OpenSSH daemon's core functionality or installation.

Concept tested. SSH authentication troubleshooting

Reference. https://www.ssh.com/academy/ssh/authentication

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