diff --git a/生成SSL自签名证书并测试.md b/生成SSL自签名证书并测试.md
index d4708d8..166c890 100644
--- a/生成SSL自签名证书并测试.md
+++ b/生成SSL自签名证书并测试.md
@@ -34,9 +34,9 @@ subject=/C=cn/ST=gd/L=sz/O=company/OU=section/CN=zlm.com/emailAddress=xiachu@qq.
 Getting Private key
 ```
 
-# 4、合并公钥私钥
+# 4、合并公钥私钥(需要私钥在前)
 ```bash
-cat server.crt server.key > ./ssl.pem
+cat server.key server.crt > ./ssl.pem
 ```
 
 # 5、加载证书
@@ -45,3 +45,15 @@ cat server.crt server.key > ./ssl.pem
 ```
 ![图片.png](https://upload-images.jianshu.io/upload_images/8409177-a3e64c0c8b642521.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
 
+
+# 6、如果第5步报错，检查格式是否正确
+```bash
+cat ./ssl.pem
+-----BEGIN RSA PRIVATE KEY-----
+base64内容
+-----END RSA PRIVATE KEY-----
+-----BEGIN CERTIFICATE-----
+base64内容
+-----END CERTIFICATE-----
+```
+如果不是-----BEGIN RSA PRIVATE KEY----- 可以重新开始第4部，将文件调换下顺序，重新合并
\ No newline at end of file