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Merge pull request #7489 from duglin/7281

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fix for issue 7281
Upstream-commit: 9fa4bea03b13923c399e9244808a83d007f93662
Component: engine
This commit is contained in:
James Turnbull
2014-08-10 13:27:21 -04:00
parent 9c2865f2e8 811bdfdcea
commit 3182bc2e13
1 changed files with 5 additions and 0 deletions
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5
components/engine/docs/sources/reference/builder.md
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@ -164,6 +164,11 @@ any point in an image's history, much like source control.
The *exec* form makes it possible to avoid shell string munging, and to `RUN`
commands using a base image that does not contain `/bin/sh`.
> **Note**:
> To use a different shell, other than '/bin/sh', use the *exec* form
> passing in the desired shell. For example,
> `RUN ["/bin/bash", "-c", "echo hello"]`
The cache for `RUN` instructions isn't invalidated automatically during
the next build. The cache for an instruction like `RUN apt-get
dist-upgrade -y` will be reused during the next build. The cache for