Q. User ID which equals 0 is ______ ?

  • (A) An invalid identifier
  • (B) The user ID of the root user
  • (C) User ID when their account is deleted
  • (D) None of the above
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✅ Correct Answer: (B) The user ID of the root user
Explanation: Does the user root always have uid = 0 and gid = 0 on Linux? Yes. There is code in the kernel that explicitly checks that uid equals 0, which means that root always has at least uid = 0.

Published by Jatin Dubey ⭐ 3.78K Points at 16-Sep-2022 06:23 am in Linux

Explanation by: Jatin Dubey
Does the user root always have uid = 0 and gid = 0 on Linux? Yes. There is code in the kernel that explicitly checks that uid equals 0, which means that root always has at least uid = 0.

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