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these markdown files are not consumed directly in the docs, but only their content is included through the YAML does, so there's no need to have these comments in them Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
79 lines
3.0 KiB
Markdown
79 lines
3.0 KiB
Markdown
---
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title: "history"
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description: "The history command description and usage"
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keywords: "docker, image, history"
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---
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# history
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```markdown
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Usage: docker history [OPTIONS] IMAGE
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Show the history of an image
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Options:
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--format string Pretty-print images using a Go template
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--help Print usage
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-H, --human Print sizes and dates in human readable format (default true)
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--no-trunc Don't truncate output
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-q, --quiet Only show image IDs
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```
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## Examples
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To see how the `docker:latest` image was built:
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```bash
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$ docker history docker
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IMAGE CREATED CREATED BY SIZE COMMENT
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3e23a5875458 8 days ago /bin/sh -c #(nop) ENV LC_ALL=C.UTF-8 0 B
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8578938dd170 8 days ago /bin/sh -c dpkg-reconfigure locales && loc 1.245 MB
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be51b77efb42 8 days ago /bin/sh -c apt-get update && apt-get install 338.3 MB
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4b137612be55 6 weeks ago /bin/sh -c #(nop) ADD jessie.tar.xz in / 121 MB
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750d58736b4b 6 weeks ago /bin/sh -c #(nop) MAINTAINER Tianon Gravi <ad 0 B
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511136ea3c5a 9 months ago 0 B Imported from -
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```
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To see how the `docker:apache` image was added to a container's base image:
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```bash
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$ docker history docker:scm
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IMAGE CREATED CREATED BY SIZE COMMENT
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2ac9d1098bf1 3 months ago /bin/bash 241.4 MB Added Apache to Fedora base image
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88b42ffd1f7c 5 months ago /bin/sh -c #(nop) ADD file:1fd8d7f9f6557cafc7 373.7 MB
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c69cab00d6ef 5 months ago /bin/sh -c #(nop) MAINTAINER Lokesh Mandvekar 0 B
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511136ea3c5a 19 months ago 0 B Imported from -
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```
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### Format the output
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The formatting option (`--format`) will pretty-prints history output
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using a Go template.
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Valid placeholders for the Go template are listed below:
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| Placeholder | Description |
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| --------------- | ----------- |
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| `.ID` | Image ID |
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| `.CreatedSince` | Elapsed time since the image was created if `--human=true`, otherwise timestamp of when image was created |
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| `.CreatedAt` | Timestamp of when image was created |
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| `.CreatedBy` | Command that was used to create the image |
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| `.Size` | Image disk size |
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| `.Comment` | Comment for image |
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When using the `--format` option, the `history` command will either
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output the data exactly as the template declares or, when using the
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`table` directive, will include column headers as well.
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The following example uses a template without headers and outputs the
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`ID` and `CreatedSince` entries separated by a colon for the `busybox` image:
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```bash
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$ docker history --format "{{.ID}}: {{.CreatedSince}}" busybox
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f6e427c148a7: 4 weeks ago
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<missing>: 4 weeks ago
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```
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