From 99181f12db019d715aac11c5ef5f68714a9506aa Mon Sep 17 00:00:00 2001
From: Hatter Jiang <hatter@noreply.example.org>
Date: Thu, 27 Jun 2024 00:44:51 +0800
Subject: [PATCH] Update 'pkcs15-tools.md'

---
 pkcs15-tools.md | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/pkcs15-tools.md b/pkcs15-tools.md
index edef938..a0bf940 100644
--- a/pkcs15-tools.md
+++ b/pkcs15-tools.md
@@ -10,4 +10,9 @@ X.509 Certificate [Certificate for Card Authentication]
 	Encoded serial : 02 09 0088891A87487694BA
 
 $ pkcs15-tool --read-certificate 04
-```
\ No newline at end of file
+```
+
+<br>
+
+# Reference
+1. https://ubuntu.com/server/docs/smart-card-authentication