@@ -1295,6 +1295,36 @@ It is even useful to cherry-pick particular tags of an image repository

    $ sudo docker save -o ubuntu.tar ubuntu:lucid ubuntu:saucy

+## exec

+

+    Usage: docker exec CONTAINER COMMAND [ARG...]

+

+    Run a command in an existing container

+

+      -d, --detach=false         Detached mode: run the process in the background and exit

+      -i, --interactive=false    Keep STDIN open even if not attached

+      -t, --tty=false            Allocate a pseudo-TTY

+

+The `docker exec` command runs a user specified command as a new process in an existing

+user specified container. The container needs to be active.

+

+The `docker exec` command will typically be used after `docker run`.

+

+### Examples:

+

+    $ sudo docker run --name ubuntu_bash --rm -i -t ubuntu bash

+

+This will create a container named 'ubuntu_bash' and start a bash session.

+

+    $ sudo docker exec -d ubuntu_bash touch /tmp/execWorks

+

+This will create a new file '/tmp/execWorks' inside the existing and active container

+'ubuntu_bash', in the background.

+

+    $ sudo docker exec ubuntu_bash -it bash

+

+This will create a new bash session in the container 'ubuntu_bash'.

+

 ## search