Adding exec command

source/commands/exec_command.rst

@@ -0,0 +1,34 @@
+.. _exec_command:
+
+run
+===
+
+To command ``exec`` has some options:
+
+
+.. code-block:: bash
+	
+	rfswift exec --help
+	[...]
+	Usage:
+	  rfswift exec [flags]
+
+	Flags:
+	  -e, --command string     command to exec (required!)
+	  -c, --container string   container to run
+	  -h, --help               help for exec
+	  -i, --install string     install from function script (e.g: 'sdrpp_soft_install')
+
+
+To get the container ID of a previous session, you can issue the command ``last`` documented :ref:`here<last_containers>`.
+
+Once you have the desired container ID, you can execute a command inside a running or paused container as follows:
+
+.. code-block:: bash
+
+	rfswift exec -c 83471263e5e5f9951d83ec27dec37ff5273f92411830b3a08d4053c05b773fe7 -e urh
+
+
+.. warning::
+
+   This command will likely fail if you issue it against a Docker container associated to a build process.

source/index.rst

@@ -90,6 +90,7 @@ You feel inspired and want to share you cakes, or you have an issues to report o
    :hidden:
    :caption: RF Swift's commands
 
+   commands/run_command.rst
    commands/run_command.rst
    commands/last_containers.rst
    commands/hot_install.rst