for example google dorks are very well known, they're very useful when looking for info, as well as shodan, censys, and many other web tools... but which command line tool do you recommend, one that already comes by default in kali?
That's a pretty broad question and difficult to answer without a little bit more information. What exactly are you looking to achieve? If you are trying to find vulnerable web apps you're going to be using different tools than if you are trying to find out more about a username or a person. Glad to help out if you can provide a little more info.
