diff --git a/api-guide/source/down_cells.rst b/api-guide/source/down_cells.rst
index 25da06f8b695..bd5980d4d3d8 100644
--- a/api-guide/source/down_cells.rst
+++ b/api-guide/source/down_cells.rst
@@ -243,7 +243,7 @@ behavior are described below:
     in the boot-from-volume case, this value will be an empty string.
   - flavor: The flavor details of the server.
   - availability_zone: The availability_zone of the server if it was specified
-    during during boot time and "UNKNOWN" otherwise.
+    during boot time and "UNKNOWN" otherwise.
   - power_state: Its value will be 0 (``NOSTATE``).
   - links: Links to the servers in question.
   - server_groups: The UUIDs of the server groups to which the server belongs.
diff --git a/doc/source/admin/configuration/hypervisor-xen-libvirt.rst b/doc/source/admin/configuration/hypervisor-xen-libvirt.rst
index 795e83e8e84b..5ffef048dd50 100644
--- a/doc/source/admin/configuration/hypervisor-xen-libvirt.rst
+++ b/doc/source/admin/configuration/hypervisor-xen-libvirt.rst
@@ -160,7 +160,7 @@ Use the following as a guideline for configuring Xen for use in OpenStack:
 
       $ openstack image set --property hypervisor_type=xen vm_mode=hvm IMAGE
 
-   For more more information on image metadata, refer to the `OpenStack Virtual
+   For more information on image metadata, refer to the `OpenStack Virtual
    Image Guide <https://docs.openstack.org/image-guide/image-metadata.html>`__.
 
 #. **Libguestfs file injection**: OpenStack compute nodes can use `libguestfs
diff --git a/nova/api/validation/parameter_types.py b/nova/api/validation/parameter_types.py
index 11269b174cbf..caeb2d7eb055 100644
--- a/nova/api/validation/parameter_types.py
+++ b/nova/api/validation/parameter_types.py
@@ -119,7 +119,7 @@ def _build_regex_range(ws=True, invert=False, exclude=None):
 
     The inversion is useful when we want to generate a set of ranges
     which is everything that's not a certain class. For instance,
-    produce all all the non printable characters as a set of ranges.
+    produce all the non printable characters as a set of ranges.
     """
     if exclude is None:
         exclude = []
diff --git a/nova/db/sqlalchemy/api.py b/nova/db/sqlalchemy/api.py
index fc66425ab1b0..5b37a483003e 100644
--- a/nova/db/sqlalchemy/api.py
+++ b/nova/db/sqlalchemy/api.py
@@ -1824,7 +1824,7 @@ def instance_destroy(context, instance_uuid, constraint=None,
     if constraint is not None:
         query = constraint.apply(models.Instance, query)
     # Either in hard or soft delete, we soft delete the instance first
-    # to make sure that that the constraints were met.
+    # to make sure that the constraints were met.
     count = query.soft_delete()
     if count == 0:
         raise exception.ConstraintNotMet()
diff --git a/nova/virt/ironic/driver.py b/nova/virt/ironic/driver.py
index 75aca89e9bd7..36e6fb49379d 100644
--- a/nova/virt/ironic/driver.py
+++ b/nova/virt/ironic/driver.py
@@ -599,7 +599,7 @@ class IronicDriver(virt_driver.ComputeDriver):
         VCPU/RAM/disk. By adding just the custom RC to the existing flavor
         extra_specs, the periodic call to update_available_resources() will add
         an allocation against the custom resource class, and prevent placement
-        from thinking that that node is available. This code can be removed in
+        from thinking that node is available. This code can be removed in
         Queens, and will need to be updated to also alter extra_specs to
         zero-out the old-style standard resource classes of VCPU, MEMORY_MB,
         and DISK_GB.
diff --git a/nova/virt/powervm/volume/fcvscsi.py b/nova/virt/powervm/volume/fcvscsi.py
index 60cfe71856a2..74f7a37c7412 100644
--- a/nova/virt/powervm/volume/fcvscsi.py
+++ b/nova/virt/powervm/volume/fcvscsi.py
@@ -278,7 +278,7 @@ class FCVscsiVolumeAdapter(object):
         """Update the stg_ftsk to append the mapping to the VIOS.
 
         :param vios_uuid: The UUID of the vios for the pypowervm adapter.
-        :param device_name: The The hdisk device name.
+        :param device_name: The hdisk device name.
         :param tag: String tag to set on the physical volume.
         """
         def add_func(vios_w):
@@ -400,7 +400,7 @@ class FCVscsiVolumeAdapter(object):
 
         :param vm_uuid: The UUID of the VM instance
         :param vios_uuid: The UUID of the vios for the pypowervm adapter.
-        :param device_name: The The hdisk device name.
+        :param device_name: The hdisk device name.
         """
         def rm_func(vios_w):
             LOG.info("Removing vSCSI mapping from physical volume %(dev)s "