You run docker build --squash -t myapp . but get an error saying the flag is unknown. What is the most likely cause?

medium📝 Troubleshoot Q14 of 15

Docker - Image Optimization

You run docker build --squash -t myapp . but get an error saying the flag is unknown. What is the most likely cause?

AThe image tag is missing

BDocker experimental features are not enabled

CThe Dockerfile has syntax errors

DThe build context path is incorrect

Step-by-Step Solution

Solution:

Step 1: Understand requirements for --squash flag
The --squash flag requires Docker experimental features to be enabled.
Step 2: Identify cause of unknown flag error
If experimental features are off, Docker does not recognize --squash and throws an error.
Final Answer:
Docker experimental features are not enabled -> Option B
Quick Check:
Enable experimental features to use --squash [OK]

Quick Trick: Enable experimental features to use --squash [OK]

Common Mistakes:

Master "Image Optimization" in Docker

9 interactive learning modes - each teaches the same concept differently

Want More Practice?

15+ quiz questions · All difficulty levels · Free

More Docker Quizzes