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When connecting to an Ubuntu EC2 instance via SSH, which username should you use by default?

easy📝 Conceptual Q2 of 15
AWS - EC2 Fundamentals
When connecting to an Ubuntu EC2 instance via SSH, which username should you use by default?
Aubuntu
Bec2-user
Cadmin
Droot
Step-by-Step Solution
Solution:

  1. Step 1: Identify default usernames for EC2 Linux distros

    Ubuntu EC2 instances use 'ubuntu' as the default SSH username.

  2. Step 2: Differentiate from other distros

    Amazon Linux uses 'ec2-user'; 'root' is generally disabled for direct login.

  3. Final Answer:

    ubuntu -> Option A

  4. Quick Check:

    Ubuntu EC2 instances default to 'ubuntu' user [OK]
Quick Trick: Ubuntu EC2 uses 'ubuntu' username by default [OK]
Common Mistakes:
  • Using 'ec2-user' for Ubuntu instances
  • Trying to login as 'root' directly

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