Clarify --env-file usage with names without values

Signed-off-by: Denis Defreyne <denis@soundcloud.com>
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Denis Defreyne 2017-04-27 11:12:48 +02:00
parent d90fb13de7
commit ebe0a489a5
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@ -393,17 +393,20 @@ If no `=` is provided and that variable is not exported in your local
environment, the variable won't be set in the container.
You can also load the environment variables from a file. This file should use
the syntax `<variable>= value`, and `#` for comments.
the syntax `<variable>=value` (which sets the variable to the given value) or
`<variable>` (which takes the value from the local environment), and `#` for comments.
```bash
$ cat env.list
# This is a comment
VAR1=value1
VAR2=value2
USER
$ docker run --env-file env.list ubuntu env | grep VAR
VAR1=value1
VAR2=value2
USER=denis
```
### Set metadata on container (-l, --label, --label-file)