So here they are:
Stackoverflow.com– this is where you can ask programming questions. In any computer programming language. You can ask questions regarding python, php, java, ruby, etc. But questions tend to be repeated or related to each other so please try to search for your query first before you go asking some questions.
Serverfault.com- this is where you can ask questions about networking and the like. You can ask questions about your router configuration. Apache server. And other things related to it.
That’s all. I hope you will find this sites useful.