diff --git a/doc/user-guide/source/cli-change-the-size-of-your-server.rst b/doc/user-guide/source/cli-change-the-size-of-your-server.rst
index 5d0458fefe..792f6ea101 100644
--- a/doc/user-guide/source/cli-change-the-size-of-your-server.rst
+++ b/doc/user-guide/source/cli-change-the-size-of-your-server.rst
@@ -71,13 +71,14 @@ Change the size of a server by changing its flavor.
 
    .. note::
 
-      By default, the :command:`openstack server resize` command gives the guest operating
+      By default, the :command:`openstack server resize` command gives
+      the guest operating
       system a chance to perform a controlled shutdown before the instance
       is powered off and the instance is resized.
       The shutdown behavior is configured by the
       ``shutdown_timeout`` parameter that can be set in the
       ``nova.conf`` file. Its value stands for the overall
-      period (in seconds) a guest operation system is allowed
+      period (in seconds) a guest operating system is allowed
       to complete the shutdown. The default timeout is 60 seconds.
       See `Description of Compute configuration options
       <https://docs.openstack.org/ocata/config-reference/compute/config-options.html>`_
diff --git a/doc/user-guide/source/cli-reboot-an-instance.rst b/doc/user-guide/source/cli-reboot-an-instance.rst
index fc286e49cb..f9966ee82b 100644
--- a/doc/user-guide/source/cli-reboot-an-instance.rst
+++ b/doc/user-guide/source/cli-reboot-an-instance.rst
@@ -49,7 +49,7 @@ command:
    The shutdown behavior is configured by the ``shutdown_timeout``
    parameter that can be set in the ``nova.conf`` file.
    Its value stands for the overall period (in seconds)
-   a guest operation system is allowed to complete the shutdown.
+   a guest operating system is allowed to complete the shutdown.
    The default timeout is 60 seconds. See `Description of
    Compute configuration options
    <https://docs.openstack.org/ocata/config-reference/compute/config-options.html>`_
diff --git a/doc/user-guide/source/cli-stop-and-start-an-instance.rst b/doc/user-guide/source/cli-stop-and-start-an-instance.rst
index e8dfb2a065..5f76b897fd 100644
--- a/doc/user-guide/source/cli-stop-and-start-an-instance.rst
+++ b/doc/user-guide/source/cli-stop-and-start-an-instance.rst
@@ -65,7 +65,7 @@ You can run the following shelving tasks:
    instance is powered off. The shutdown behavior is configured by the
    ``shutdown_timeout`` parameter that can be set in the
    :file:`nova.conf` file. Its value stands for the overall
-   period (in seconds) a guest operation system is allowed
+   period (in seconds) a guest operating system is allowed
    to complete the shutdown. The default timeout is 60 seconds.
    See `Description of Compute configuration options
    <https://docs.openstack.org/ocata/config-reference/compute/config-options.html>`_