Rajesh P • 3/31/2026

Understanding Docker –no-cache

This article details Docker's layer caching mechanism, which speeds up builds by reusing unchanged layers. It highlights issues with stale layers causing outdated dependencies or security updates. The solution is the --no-cache flag, which forces a complete rebuild from scratch. The article also covers targeted cache busting using ARG to selectively invalidate layers. It provides guidance on when to use --no-cache in development, debugging, CI/CD, and security contexts, making it a practical guide for developers using Docker.

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#build optimization #docker #dockerfile