CompTIA Linux+ Practice Questions: Shell Configuration

5 free, exam-style CompTIA Linux+ (XK0-006) practice questions covering Shell Configuration. Each question shows the correct answer and a clear explanation. Ready for the real thing? Take the full timed quiz below.

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Q1. Which file defines default shell variables?

A./etc/profile
B.~/.bashrc
C./etc/environment✓ Correct
D./etc/passwd

Explanation: /etc/environment sets system-wide environment variables. Learn more.

Q2. What command lists all environment variables?

A.env✓ Correct
B.set
C.export
D.echo $PATH

Explanation: env prints current environment variables. Learn more.

Q3. What does 'echo $?' display?

A.Current user
B.Last command's exit code✓ Correct
C.Environment variables
D.Process ID

Explanation: $? contains exit status of previous command. Learn more.

Q4. Which file defines system-wide aliases?

A./etc/bashrc✓ Correct
B./etc/profile
C./etc/aliases
D./etc/environment

Explanation: /etc/bashrc contains global bash settings. Learn more.

Q5. Which command shows environment variables?

A.env
B.set
C.printenv
D.All of the above✓ Correct

Explanation: All display environment variables in different formats. Learn more.