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85 lines
2.6 KiB
Markdown
85 lines
2.6 KiB
Markdown
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---
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title: "tag"
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description: "The tag command description and usage"
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keywords: "tag, name, image"
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---
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<!-- This file is maintained within the docker/cli GitHub
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repository at https://github.com/docker/cli/. Make all
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pull requests against that repo. If you see this file in
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another repository, consider it read-only there, as it will
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periodically be overwritten by the definitive file. Pull
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requests which include edits to this file in other repositories
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will be rejected.
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-->
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# tag
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```markdown
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Usage: docker tag SOURCE_IMAGE[:TAG] TARGET_IMAGE[:TAG]
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Create a tag TARGET_IMAGE that refers to SOURCE_IMAGE
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Options:
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--help Print usage
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```
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## Description
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An image name is made up of slash-separated name components, optionally prefixed
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by a registry hostname. The hostname must comply with standard DNS rules, but
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may not contain underscores. If a hostname is present, it may optionally be
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followed by a port number in the format `:8080`. If not present, the command
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uses Docker's public registry located at `registry-1.docker.io` by default. Name
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components may contain lowercase letters, digits and separators. A separator
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is defined as a period, one or two underscores, or one or more dashes. A name
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component may not start or end with a separator.
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A tag name must be valid ASCII and may contain lowercase and uppercase letters,
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digits, underscores, periods and dashes. A tag name may not start with a
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period or a dash and may contain a maximum of 128 characters.
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You can group your images together using names and tags, and then upload them
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to [*Share Images via Repositories*](https://docs.docker.com/engine/tutorials/dockerrepos/#/contributing-to-docker-hub).
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## Examples
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### Tag an image referenced by ID
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To tag a local image with ID "0e5574283393" into the "fedora" repository with
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"version1.0":
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```bash
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$ docker tag 0e5574283393 fedora/httpd:version1.0
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```
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### Tag an image referenced by Name
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To tag a local image with name "httpd" into the "fedora" repository with
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"version1.0":
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```bash
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$ docker tag httpd fedora/httpd:version1.0
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```
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Note that since the tag name is not specified, the alias is created for an
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existing local version `httpd:latest`.
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### Tag an image referenced by Name and Tag
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To tag a local image with name "httpd" and tag "test" into the "fedora"
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repository with "version1.0.test":
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```bash
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$ docker tag httpd:test fedora/httpd:version1.0.test
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```
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### Tag an image for a private repository
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To push an image to a private registry and not the central Docker
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registry you must tag it with the registry hostname and port (if needed).
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```bash
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$ docker tag 0e5574283393 myregistryhost:5000/fedora/httpd:version1.0
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```
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