XK0-005 Question #1238: Real Exam Question with Answer & Explanation

Question

A user wants to alias dir so it always returns the contents of the ls -la command. However, the user has to reset the alias with every login. Which of the following is the BEST action the user can take to ensure the command is always available?

Options

• Aecho "alias dir=ls -la" > /etc/profile
• Becho "alias dir=ls -la" >> /etc/skel
• Cecho "alias dir=ls -la" >> ~/.profile
• Decho "alias dir=ls -la" > ~/.bashrc

Explanation

{"question_number": 5, "question": "A user wants to alias dir so it always returns the contents of the ls -la command. However, the user has to reset the alias with every login. Which of the following is the BEST action the user can take to ensure the command is always available?", "correct_answer": "C", "explanation": "To make an alias persist across logins for a specific user, it should be appended to a shell initialization file that is sourced at login time. ~/.profile is sourced by login shells (bash, sh) and is the standard, shell-agnostic location for user-specific environment settings. Choice C uses '>>' (append), which is correct - it adds the alias without overwriting existing content. Choice A writes to /etc/profile, which affects all users system-wide and requires root access; it is overly broad for a single user's alias. Choice B targets /etc/skel, which is a directory used as a template for new user home directories - not appropriate here. Choice D writes to ~/.bashrc using '>' (overwrite), which would destroy all existing content in the file, making it destructive even if .bashrc were the right target. ~/.profile is the safest and most appropriate per-user, login-persistent location.", "generated_by": "claude-sonnet", "llm_judge_score": 3}

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