performance medium Apply redir-stderr 2 points

Question 35. CSCD240-E1-A

Send only stderr of "scan /etc/shadow" to errors.log; keep stdout on terminal.

Work the drill

Answer on paper or in a terminal before revealing the ideal answer.

Ideal answer

scan /etc/shadow 2> errors.log

Misconception bank

Each row below is a plausible wrong answer, the thinking that produces it, and the remedy that corrects the misconception. These are the foundation of the multiple-choice framing and the targeted feedback a student receives after answering.

scan /etc/shadow > errors.log

Misconception. Redirects stdout instead of stderr.

Remedy. Teach fd numbers and their operators.

scan /etc/shadow &> errors.log

Misconception. Redirects BOTH, not just stderr.

Remedy. &> is for merge; 2> for stderr-only.

Authority mappings

Hover any chip for the mapping justification; click to open the authority record.

DCWF roles: IT-451 System Administrator

DCWF tasks: T0498

KU outcomes: CD-BSP-O1

KU topics: CD-BSP-T8i

Course-artifact links

Lectures

CSCD240-S26-L07. I/O redirection, aliases, source, .bashrc, env

Lab questions

CSCD240-S26-LAB4: Redirect ls /nonexistent errors to err.log using 2>.

CTF challenges

03 I/O & Pipelines: Catch Only Errors
03 I/O & Pipelines: Stream Number 2
03 I/O & Pipelines: The Error Stream