diff --git a/docs/configure_https.md b/docs/configure_https.md
index 8c12af0f3..0c3641066 100644
--- a/docs/configure_https.md
+++ b/docs/configure_https.md
@@ -27,8 +27,6 @@ Otherwise, if you use IP address to connect your registry host, CN can be anythi
 ```
 3) Generate the certificate of your registry host:
 
-On Ubuntu, the config file of openssl locates at **/etc/ssl/openssl.cnf**. Refer to openssl document for more information.  
-
 If you're using FQDN like **reg.yourdomain.com** to connect your registry host, then run this command to generate the certificate of your registry host:
 
 ```