diff --git a/rtfd/index.rst b/rtfd/index.rst
index 59d84e4..33709ed 100644
--- a/rtfd/index.rst
+++ b/rtfd/index.rst
@@ -17,6 +17,7 @@ RTFD
    public/connect/index
    public/coreutils/index
    public/curl/index
+   public/dane/index
    public/dd/index
    public/debian/index
    public/debmirror/index
diff --git a/rtfd/public/dane/index.rst b/rtfd/public/dane/index.rst
new file mode 100644
index 0000000..c3ded1b
--- /dev/null
+++ b/rtfd/public/dane/index.rst
@@ -0,0 +1,12 @@
+****
+dane
+****
+
+compute
+=======
+
+.. code-block:: shell
+
+ openssl x509 -noout -fingerprint -sha512 -in domain.tld.crt \
+ | awk --field-separator '=' '{print tolower($2)}' \
+ | tr --delete ':'