DevOps

Overview This guide shows practical ways to install and use Git inside Docker containers. You’ll get a minimal working example, distro-specific install commands, secure configuration, non-root usage, and performance......

Why use a Makefile for Git? Short Make targets reduce typing, enforce consistent flags, and provide a discoverable, project-local interface for frequent Git tasks. This is handy for DevOps teams standardizing workflows across......

What this error means You run docker compose (or docker-compose) and see something like: error: invalid interpolation format for "...": "..." Compose tried to substitute an environment variable and found a malformed......

What this error means Docker Compose raises this when a service lists depends_on entries that do not correspond to any defined (and active) service in the current Compose project. Typical causes include typos, YAML indentation issues,......

What this error means You ran docker compose up (or docker-compose up) and saw: ERROR: volume ... declared as external, but could not be found Compose will not create external volumes. It expects the volume to already exist on the target......

Overview You run docker compose up and see: ERROR: network <name> declared as external, but could not be found This means your Compose file references a network marked as external, but Docker cannot find a pre-existing network with......

What this error means Error snippet you may see: failed to solve: process "/bin/sh -c …" did not complete successfully Translation: a command in a RUN (or similar) layer returned a non‑zero exit code. BuildKit summarizes the......

What this error means You ran a build that needs BuildKit features (for example, --platform, cache mounts, or new Dockerfile syntax) and Docker fell back to the legacy builder. The CLI tells you either to enable BuildKit......

Overview If docker pull fails behind a corporate proxy, it’s almost always the Docker daemon (dockerd) lacking correct proxy settings or trust for your proxy’s TLS certificate. The client binary (docker) talks to dockerd over a local......

Overview The Docker error "Error response from daemon: layer does not exist" often appears when containers or images reference layers that were garbage‑collected or left dangling (<none>:<none>). This guide shows how......

What this error means You tried to remove a Docker image (or tag) that is still referenced. Common causes: A running or stopped container uses the image. The image has multiple tags; you’re deleting one while others still reference the......

What this error means Docker refuses to delete a network if any endpoint is still attached. Endpoints come from containers, Compose projects, or Swarm services using that network. You must disconnect or remove those endpoints......