Software⏱️ 2 min read📅 2026-05-31

How to Fix: How can I inspect the file system of a failed `docker build`?

Inspect failed Docker build file system

Quick Answer: Check the /root/.cpanm/work directory for logs, or use docker exec -it /bin/bash to inspect the container's file system.

📋 Table of Contents

  1. 🔍 Why This Happens
  2. 🚀 How to Resolve This Issue
  3. ✨ Wrapping Up

To diagnose the issue with a failed Docker build, you can inspect the file system of the container that was used to create the image. The location of this directory is usually in the output of the Docker build command.

🔍 Why This Happens

  • When a Docker build fails, the container that was used to create the image is not fully cleaned up.

🚀 How to Resolve This Issue

Method 1: Inspecting the Container Directory

  1. Step 1: Run the command docker run --rm -it /bin/sh to open a shell inside the container.

Method 2: Inspecting the Docker Build Output

  1. Step 1: Look for the line that contains /home/cpanm/work/, which indicates the location of the container's file system.

✨ Wrapping Up

To further diagnose the issue, you can inspect the contents of the /home/cpanm/work/ directory using a command like ls -l or find /home/cpanm/work/ -type f.

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