What is the purpose of the –no-cache flag in docker build and when should it be used?

Question

Docker Fundamentals — Hard

What is the purpose of the –no-cache flag in docker build and when should it be used?

Accepted Answer

The purpose of the --no-cache flag in docker build is to force Docker to rebuild every layer from scratch, ignoring cached layers. This is useful when the cache may be stale, such as when needing the latest packages with apt-get install, or to ensure a reproducible build that is not dependent on the local cache state.