[Solved] What will be the output of this command?docker run --read-only alpine sh -c "touch /file && echo success || echo fail" | Docker

Docker - Security

What will be the output of this command?
docker run --read-only alpine sh -c "touch /file && echo success || echo fail"

Afail

Bsuccess

Ctouch: cannot touch '/file': Read-only file system

DNo output

Step-by-Step Solution

Solution:

Step 1: Understand the command behavior on read-only filesystem
The touch /file command tries to create a file in the root filesystem, which is read-only, so it fails.
Step 2: Analyze shell logic
Because touch fails, the shell runs the command after ||, printing "fail".
Final Answer:
fail -> Option A
Quick Check:
Write fails on read-only FS, so shell prints fail [OK]

Quick Trick: Write fails on read-only FS, shell fallback triggers [OK]

Common Mistakes:

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