When provisioning a self-hosted Linux agent for Azure DevOps, which authentication mechanism should be used to register the agent?
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Correct answer: Personal access token (PAT).
Why this is the answer
A Personal Access Token (PAT) is the recommended and most common authentication mechanism for registering a self-hosted Linux agent with Azure DevOps. The PAT provides a secure way to authenticate the agent to your Azure DevOps organization, granting it the necessary permissions to fetch jobs and report results. SSH keys are primarily used for secure shell access to the agent machine itself, not for authenticating the agent to Azure DevOps. Alternate credentials are an older authentication method, less secure and flexible than PATs. Certificates are generally used for server-to-server authentication or client authentication in specific scenarios, but not for agent registration in Azure DevOps.
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