Manage SSH Keys for Authentication GITLAB-CERTIFIED-GIT-ASSOCIATE Practice Questions (Page 4)

Questions 16–20

1. 16foundation · easy

   What is the purpose of the -b option in the command ssh-keygen -t rsa -b 4096?

   • AIt sets the number of passes used to derive the key from the passphrase.
   • BIt specifies the file name where the key will be saved.
   • CIt enables batch mode, preventing interactive prompts during key generation.
   • DIt specifies the number of bits in the key, controlling its cryptographic strength.
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2. 17application · medium

   A user wants to change the passphrase on an existing SSH private key. Which command should they use?

   • Assh-keygen -t ed25519 -f ~/.ssh/id_ed25519
   • Bssh-keygen -p -f ~/.ssh/id_ed25519
   • Cssh-add -p ~/.ssh/id_ed25519
   • Dssh-keygen -c -f ~/.ssh/id_ed25519
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4. 18foundation · easy

   What is the most likely cause of the error 'Permissions 0644 for '/home/user/.ssh/id_ed25519' are too open'?

   • AThe private key file has permissions that are too permissive, allowing other users to read it.
   • BThe public key file is missing from the GitLab account.
   • CThe SSH agent is not running.
   • DThe key type is not supported by GitLab.
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5. 19foundation · easy

   What does the -T option do in the command ssh -T git@gitlab.com?

   • AIt forces the use of a specific SSH key file.
   • BIt specifies the timeout for the connection attempt.
   • CIt disables pseudo-terminal allocation, which is useful for testing.
   • DIt enables verbose output for debugging.
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6. 20foundation · easy

   In the SSH config file, which directive specifies which private key to use for a particular host?

   • AHostName
   • BIdentityFile
   • CUser
   • DPort
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