As a developer you got a Magento 2 project, integrate theme, complete all customization, tested all sales functionality. Your project is now ready for production. When you enter into backend catalog product grid, you will see all your test products. You can delete one-by-one or multiple at a time, right?
If you are like most of the developers, you will have juggled through different websites to find SSH / CLI commands for Magento 2. There is no single resource on web which has all useful commands list for Magento 2. I have been there and I know it is a sheer