A

Admin • 802.91K Points
Coach

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
  • Correct Answer - Option(B)
  • Views: 4
  • Filed under category Linux
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Explanation by: Admin
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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