Magento2-Sample-Module

1. App-> code-> SimplifiedMagento-> FirstModule-> etc-> module.xml

2. App -> code -> SimplifiedMagento -> FirstModule -> registration.php

3. php bin/magento setup:upgrade

   Adding Function Module

Building Url http://magento.com/tutorial/page/helloword

   Baseurl       Frontend Controller  Action

4. code -> SimplifiedMagento -> FirstModule -> etc -> frontend -> routes.xml
5. code -> SimplifiedMagento -> FirstModule -> Controller -> Page -> HelloWorld.php

http://localhost/Magento/tutorial/page/helloworld

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1. Vendor -> magento -> module-catalog -> etc -> module.xml
2. Vendor -> magento -> module-catalog -> registration.php
3. Vendor -> magento -> module-catalog -> etc -> frontend -> routes.xml

https://magento.stackexchange.com/questions/200022/how-to-create-custom-module-development-in-magento-2-from-scratch