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Added and example of using --format with docker images 

Docker-DCO-1.1-Signed-off-by: William Henry <whenry@redhat.com> (github: ipbabble)

Signed-off-by: William Henry <whenry@redhat.com>
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William Henry 2016-11-22 17:24:17 -07:00 committed by Tibor Vass
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@ -103,6 +103,43 @@ which displayed different visualizations of the image data. Docker core removed
this functionality in the 1.7 version. If you liked this functionality, you can
still find it in the third-party dockviz tool: https://github.com/justone/dockviz.
## Listing images in a desired format
When using the --format option, the image command will either output the data
exactly as the template declares or, when using the `table` directive, will
include column headers as well. You can use special characters like `\t` for
inserting tab spacing between columns.
The following example uses a template without headers and outputs the ID and
Repository entries separated by a colon for all images:
docker images --format "{{.ID}}: {{.Repository}}"
77af4d6b9913: <none>
b6fa739cedf5: committ
78a85c484bad: ipbabble
30557a29d5ab: docker
5ed6274db6ce: <none>
746b819f315e: postgres
746b819f315e: postgres
746b819f315e: postgres
746b819f315e: postgres
To list all images with their repository and tag in a table format you can use:
docker images --format "table {{.ID}}\t{{.Repository}}\t{{.Tag}}"
IMAGE ID REPOSITORY TAG
77af4d6b9913 <none> <none>
b6fa739cedf5 committ latest
78a85c484bad ipbabble <none>
30557a29d5ab docker latest
5ed6274db6ce <none> <none>
746b819f315e postgres 9
746b819f315e postgres 9.3
746b819f315e postgres 9.3.5
746b819f315e postgres latest
Valid template placeholders are listed above.
## Listing only the shortened image IDs
Listing just the shortened image IDs. This can be useful for some automated