You want to run backup.sh only if prepare.sh succeeds, but if prepare.sh fails, you want to run cleanup.sh. Which command chaining achieves this?

hard📝 Application Q15 of 15

Linux CLI - Pipes and Redirection

You want to run backup.sh only if prepare.sh succeeds, but if prepare.sh fails, you want to run cleanup.sh. Which command chaining achieves this?

Aprepare.sh || cleanup.sh && backup.sh

Bprepare.sh && (backup.sh || cleanup.sh)

Cprepare.sh ; backup.sh ; cleanup.sh

Dprepare.sh && backup.sh || cleanup.sh

Step-by-Step Solution

Solution:

Step 1: Understand the requirement
Run backup.sh only if prepare.sh succeeds; if prepare.sh fails, run cleanup.sh.
Step 2: Analyze prepare.sh && backup.sh || cleanup.sh
prepare.sh && backup.sh || cleanup.sh means: if prepare.sh succeeds, run backup.sh. If either prepare.sh or backup.sh fails, run cleanup.sh. This matches the requirement.
Final Answer:
prepare.sh && backup.sh || cleanup.sh -> Option D
Quick Check:
Run backup if prepare succeeds, else cleanup [OK]

Quick Trick: Use && then || to handle success and failure paths [OK]

Common Mistakes:

Running cleanup even if prepare succeeds
Running backup even if prepare fails
Using ; which ignores success/failure

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More Linux CLI Quizzes

You want to run backup.sh only if prepare.sh succeeds, but if prepare.sh fails, you want to run cleanup.sh. Which command chaining achieves this?

Step 1: Understand the requirement

Step 2: Analyze prepare.sh && backup.sh || cleanup.sh

Final Answer:

Quick Check:

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