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Linux_Foundation

LFCS · Question #475

Which of the following answers regarding user account configuration are true?(Choose two)

The correct answer is A. Username is case-sensitive B. Password is case-sensitive. Both usernames and passwords in Linux-like systems are case-sensitive, ensuring distinct identities and stronger authentication.

Submitted by yuriko_h· Apr 18, 2026User and Group Management

Question

Which of the following answers regarding user account configuration are true?(Choose two)

Options

  • AUsername is case-sensitive
  • BPassword is case-sensitive
  • CUsername is case-insensitive
  • DPassword is case-insensitive

How the community answered

(40 responses)
  • A
    90% (36)
  • C
    3% (1)
  • D
    8% (3)

Why each option

Both usernames and passwords in Linux-like systems are case-sensitive, ensuring distinct identities and stronger authentication.

AUsername is case-sensitiveCorrect

Usernames on Linux and Unix-like systems are case-sensitive, meaning 'bob' and 'Bob' are treated as two separate and distinct user accounts.

BPassword is case-sensitiveCorrect

Passwords in Linux/Unix systems are case-sensitive, which is a fundamental security practice that significantly increases the complexity and strength of passwords.

CUsername is case-insensitive

Usernames are generally case-sensitive in Linux/Unix, differentiating between upper and lower case characters.

DPassword is case-insensitive

Passwords are case-sensitive to enhance security and prevent unauthorized access due to simple case variations.

Concept tested: Linux username and password case sensitivity

Source: https://man7.org/linux/man-pages/man5/shadow.5.html

Topics

#User Accounts#Case Sensitivity#Authentication#Login Credentials

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