diff --git a/doc/.known-issues/doc/dupdecl.conf b/doc/.known-issues/doc/dupdecl.conf
index 33873b5be..f7a25ef35 100644
--- a/doc/.known-issues/doc/dupdecl.conf
+++ b/doc/.known-issues/doc/dupdecl.conf
@@ -6,6 +6,8 @@
 # Sphinx 2.0
 ^(?P<filename>[-._/\w]+/hld/[-._/\w]+.rst):(?P<lineno>[0-9]+): WARNING: Duplicate declaration, .*
 #
+^(?P<filename>[-._/\w]+/api/[-._/\w]+.rst):(?P<lineno>[0-9]+): WARNING: duplicate C object description.*
+#
 ^(?P<filename>[-._/\w]+/hld/[-._/\w]+.rst):(?P<lineno>[0-9]+): WARNING: duplicate C object description.*
 #
 ^(?P<filename>[-._/\w]+/hld/[-._/\w]+.rst):(?P<lineno>[0-9]+): WARNING: Duplicate C\+\+ declaration, .*
diff --git a/doc/asa.rst b/doc/asa.rst
index 01642cb8f..0c2a2e7dd 100644
--- a/doc/asa.rst
+++ b/doc/asa.rst
@@ -1,4 +1,4 @@
- .. _asa:
+.. _asa:
 
 Security Advisory
 #################
diff --git a/doc/nocl.rst b/doc/nocl.rst
index bc9d5ffbb..7d7691931 100644
--- a/doc/nocl.rst
+++ b/doc/nocl.rst
@@ -1,5 +1,7 @@
 :orphan:
 
+.. _nocl:
+
 .. comment This page is a common place holder for references to /latest/
    documentation that was removed from the 2.2 release but there are
    lingering references to these docs out in the wild and in the Google
diff --git a/doc/try.rst b/doc/try.rst
index f011303b0..4319e7564 100644
--- a/doc/try.rst
+++ b/doc/try.rst
@@ -8,8 +8,6 @@ using ACRN in a reference setup.  We'll show how to set up your
 development and target hardware, and then how to boot the ACRN
 hypervisor, the Service VM, and a User VM on the Intel platform.
 
-.. _Clear Linux: https://clearlinux.org
-
 ACRN is supported on Apollo Lake and Kaby Lake Intel platforms,
 as described in :ref:`hardware`.
 
diff --git a/doc/tutorials/acrn_configuration_tool.rst b/doc/tutorials/acrn_configuration_tool.rst
index d32c81c70..ac4979ec7 100644
--- a/doc/tutorials/acrn_configuration_tool.rst
+++ b/doc/tutorials/acrn_configuration_tool.rst
@@ -507,7 +507,7 @@ Here is the offline configuration tool workflow:
       specified board name.
 
       | **Native Linux requirement:**
-      | **Release:** Ubuntu 18.04+ or Clear Linux 30210+
+      | **Release:** Ubuntu 18.04+
       | **Tools:** cpuid, rdmsr, lspci, dmidecode (optional)
       | **Kernel cmdline:** "idle=nomwait intel_idle.max_cstate=0 intel_pstate=disable"
 
diff --git a/doc/tutorials/running_deb_as_serv_vm.rst b/doc/tutorials/running_deb_as_serv_vm.rst
index 5406e0b9d..d61b9c21e 100644
--- a/doc/tutorials/running_deb_as_serv_vm.rst
+++ b/doc/tutorials/running_deb_as_serv_vm.rst
@@ -1,4 +1,4 @@
- .. _running_deb_as_serv_vm:
+.. _running_deb_as_serv_vm:
 
 Run Debian as the Service VM
 ############################
@@ -9,9 +9,8 @@ individuals who have made common cause to create a `free
 stable Debian release <https://www.debian.org/releases/stable/>`_ is
 10.0.
 
-This tutorial describes how to use Debian 10.0 instead of `Clear Linux
-OS <https://clearlinux.org>`_ as the Service VM with the ACRN
-hypervisor.
+This tutorial describes how to use Debian 10.0 as the Service VM OS with
+the ACRN hypervisor.
 
 Prerequisites
 *************