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Add an example of how to add your client IP to the container hosts file 

Signed-off-by: Sven Dowideit <SvenDowideit@home.org.au>

Docker-DCO-1.1-Signed-off-by: Sven Dowideit <SvenDowideit@home.org.au> (github: SvenDowideit)
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Sven Dowideit 2014-11-18 15:55:40 -08:00 committed by Tibor Vass
parent ab60926400
commit 00a5a3fa8a
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docs/sources/reference/commandline/cli.md
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@ -1610,6 +1610,30 @@ container exits with a non-zero exit status more than 10 times in a row
Docker will abort trying to restart the container. Providing a maximum
restart limit is only valid for the ** on-failure ** policy.
### Adding entries to a container hosts file
You can add other hosts into a container's `/etc/hosts` file by using one or more
`--add-host` flags. This example adds a static address for a host named `docker`:
```
$ docker run --add-host=docker:10.180.0.1 --rm -it debian
$$ ping docker
PING docker (10.180.0.1): 48 data bytes
56 bytes from 10.180.0.1: icmp_seq=0 ttl=254 time=7.600 ms
56 bytes from 10.180.0.1: icmp_seq=1 ttl=254 time=30.705 ms
^C--- docker ping statistics ---
2 packets transmitted, 2 packets received, 0% packet loss
round-trip min/avg/max/stddev = 7.600/19.152/30.705/11.553 ms
```
> **Note:**
> Sometimes you need to connect to the Docker host, which means getting the IP
> address of the host. You can use the following shell commands to simplify this
> process:
>
> $ alias hostip="ip route show 0.0.0.0/0 | grep -Eo 'via \S+' | awk '{ print \$2 }'"
> $ docker run --add-host=docker:$(hostip) --rm -it debian
## save
Usage: docker save [OPTIONS] IMAGE [IMAGE...]