keytool: add page (#9675)

* keytool: add page

* Integrate PR comments

* PR comments #2

pages/common/keytool.md

@@ -0,0 +1,16 @@
+# keytool
+
+> Keytool is a certificate management utility included with Java.
+> More information: <https://docs.oracle.com/en/java/javase/19/docs/specs/man/keytool.html>.
+
+- Create a keystore:
+
+`keytool -genkeypair -v -keystore {{path/to/file.keystore}} -alias {{key_name}}`
+
+- Change a keystore password:
+
+`keytool -storepasswd -keystore {{path/to/file.keystore}}`
+
+- Change a key's password inside a specific keystore:
+
+`keytool -keypasswd  -alias {{key_name}} -keystore {{path/to/file.keystore}}`