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Merge pull request #11203 from rhatdan/Dockerfile

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We had some testers who found a hard to diagnose bug in Dockerfile
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Jessie Frazelle 2015-03-16 17:26:18 -07:00
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6
docs/man/Dockerfile.5.md
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@ -97,6 +97,9 @@ A Dockerfile is similar to a Makefile.
exec form makes it possible to avoid shell string munging. The exec form makes
it possible to **RUN** commands using a base image that does not contain `/bin/sh`.
Note that the exec form is parsed as a JSON array, which means that you must
use double-quotes (") around words not single-quotes (').
**CMD**
-- **CMD** has three forms:
@ -120,6 +123,9 @@ A Dockerfile is similar to a Makefile.
be executed when running the image.
If you use the shell form of the **CMD**, the `<command>` executes in `/bin/sh -c`:
Note that the exec form is parsed as a JSON array, which means that you must
use double-quotes (") around words not single-quotes (').
```
FROM ubuntu
CMD echo "This is a test." | wc -