performance medium Apply env-path 2 points

Question 15. CSCD240-E1-A

Add /opt/tools/bin to PATH for the current shell.

Work the drill

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

Ideal answer

export PATH=$PATH:/opt/tools/bin

Acceptable alternatives: ["export PATH=\"$PATH:/opt/tools/bin\"", "PATH=$PATH:/opt/tools/bin; export PATH"]

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.

export PATH=/opt/tools/bin

Misconception. Overwrites PATH entirely — breaks every other command in the shell.

Remedy. Near-miss but catastrophic in practice — dedicate class time to PATH corruption recovery.

PATH=/opt/tools/bin

Misconception. Same as above and not exported so subshells don't see it.

Remedy. Teach export semantics vs shell-local assignment.

Authority mappings

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

DCWF roles: IT-451 System Administrator

DCWF tasks: T0418

KU outcomes: CD-BSP-O1 CO-M5-O2

KU topics: CD-BSP-T8a

O*NET tasks: SOC 15-1244.00: task 1 SOC 15-1244.00: task 2

NCAE errors: WWW Content / failure: Failed to connect to hostWWW Content / timeout: TimeoutWWW Content / failure: Website cannot be reachedSSH Login / failure: Failed to connect to host: IPSSH Login / partial: The following users failed t.SSH Login / partial: The following users failed t.

Course-artifact links

Lectures

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

Lab questions

CSCD240-S26-LAB4: export PATH=$PATH:/opt/mybin. Verify the change.

CTF challenges

04 Environment & Patterns: The Divider