@@ -80,15 +80,15 @@ it.

 Let's create a new named container with a volume to share.

-    $ docker run -d -v /dbdata --name dbdata training/postgres

+    $ sudo docker run -d -v /dbdata --name dbdata training/postgres

 You can then use the `--volumes-from` flag to mount the `/dbdata` volume in another container.

-    $ docker run -d --volumes-from dbdata --name db1 training/postgres

+    $ sudo docker run -d --volumes-from dbdata --name db1 training/postgres

 And another:

-    $ docker run -d --volumes-from dbdata --name db2 training/postgres

+    $ sudo docker run -d --volumes-from dbdata --name db2 training/postgres

 You can use multiple `--volumes-from` parameters to bring together multiple data

 volumes from multiple containers.

@@ -96,7 +96,7 @@ volumes from multiple containers.

 You can also extend the chain by mounting the volume that came from the

 `dbdata` container in yet another container via the `db1` or `db2` containers.

-    $ docker run -d --name db3 --volumes-from db1 training/postgres

+    $ sudo docker run -d --name db3 --volumes-from db1 training/postgres

 If you remove containers that mount volumes, including the initial `dbdata`

 container, or the subsequent containers `db1` and `db2`, the volumes will not