Related

Pull Image

docker

Download an image from a remote registry.

Push Image

docker

Upload a local image to a remote registry.

Build Image

docker

Build an image from a Dockerfile.

docker/tag

Tag Image

Create a new tag for an existing image.

images
tagging

Command

docker tag

Explanation

docker tag assigns a new repository and tag to an existing image ID. It doesn’t copy data but references the same image. Useful for versioning and publishing to multiple registries.

Common Use Cases

  • •Version control for images
  • •Prepare image before pushing to remote registry
  • •Rename images for easier reference

Best Practices

  • ✓Follow semantic versioning conventions (v1.0, v1.1, etc.)
  • ✓Tag before pushing to avoid overwriting latest inadvertently

Common Mistakes to Avoid

  • ⚠Tagging wrong image due to incorrect ID
  • ⚠Using invalid characters in tag names

Troubleshooting

Problem: Cannot find source image ID

Solution: Verify image exists locally using docker images.

Examples

Tag local image for pushing to a repository

docker tag myimage myrepo/myimage:v1.0

Create a new local tag

docker tag ubuntu:latest ubuntu:backup

More

Remove Image

docker

Remove one or more images from the local system.

List Images

docker

List all locally available Docker images.

Run Container

docker

Create and start a new Docker container from an image, with options for interactive mode, port mapping, volume mounting, and environment configuration.