mirror of https://github.com/moby/moby.git synced 2022-11-09 12:21:53 -05:00

Antonio Murdaca 14e8898648 Fix man and commandline docs

- missing help option in `docs/reference/commandline/*.md` (some files
  have it, the other I fixed didn't)
- missing `[OPTIONS]` in Usage description
- missing options
- formatting
- start/stop idempotence

Signed-off-by: Antonio Murdaca <amurdaca@redhat.com>

2015-10-04 21:22:27 +02:00

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save

Usage: docker save [OPTIONS] IMAGE [IMAGE...]

Save an image(s) to a tar archive (streamed to STDOUT by default)

  --help=false       Print usage
  -o, --output=""    Write to a file, instead of STDOUT

Produces a tarred repository to the standard output stream. Contains all parent layers, and all tags + versions, or specified repo:tag, for each argument provided.

It is used to create a backup that can then be used with docker load

$ docker save busybox > busybox.tar
$ ls -sh busybox.tar
2.7M busybox.tar
$ docker save --output busybox.tar busybox
$ ls -sh busybox.tar
2.7M busybox.tar
$ docker save -o fedora-all.tar fedora
$ docker save -o fedora-latest.tar fedora:latest

It is even useful to cherry-pick particular tags of an image repository

$ docker save -o ubuntu.tar ubuntu:lucid ubuntu:saucy

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save

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