diff --git a/crypto/openssl/openssl.md b/crypto/openssl/OpenSSL-Cheatsheet.md
similarity index 79%
rename from crypto/openssl/openssl.md
rename to crypto/openssl/OpenSSL-Cheatsheet.md
index 8970457..964d99b 100644
--- a/crypto/openssl/openssl.md
+++ b/crypto/openssl/OpenSSL-Cheatsheet.md
@@ -15,3 +15,9 @@ openssl pkcs12 -in cert.pfx -out cert.pem -clcerts -nokeys
 openssl pkcs12 -in *.pfx -out temp.pem -nodes
 openssl pkcs12 -export -out *.pfx -in temp.pem
 ```
+
+## Generate Certificate
+
+```sh
+openssl req -new -x509 -keyout cert.pem -out cert.pem -days 365 -nodes
+```