[Solved] What happens if you run this command?docker run --user nobody alpine id -u — Ans: Prints the UID of 'nobody' user, usually 65534 | Docker

Docker - Security

What happens if you run this command?

docker run --user nobody alpine id -u

APrints 0 because 'nobody' is root

BFails with 'user not found' error

CPrints the UID of 'nobody' user, usually 65534

DPrints the container's default user ID

Step-by-Step Solution

Solution:

Step 1: Understand 'nobody' user in alpine
Alpine has a 'nobody' user with UID usually 65534.
Step 2: id -u prints current user ID
Running as 'nobody' prints its UID, not root (0).
Final Answer:
Prints the UID of 'nobody' user, usually 65534 -> Option C
Quick Check:
Running as named user prints that user's UID = B [OK]

Quick Trick: Named users print their UID with id -u [OK]

Common Mistakes:

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