diff --git a/SysadminTips.page b/SysadminTips.page
index f5971f5..b2d6108 100644
--- a/SysadminTips.page
+++ b/SysadminTips.page
@@ -1,3 +1,9 @@
+Certbot manual example.
+
+~~~
+certbot certonly --non-interactive --webroot --webroot-path /var/www/html/ -d foo.bar -d www.foo.bar
+~~~
+
 GPG-agent list SSH key and remove.
 
 ~~~