@veer66 Well, let me tell you a story...

Back in the day, I had to work on a platform that was an unholy mix of Symfony and a hopelessly outdated version of Joomla with some WordPress blogs thrown in. That platform didn't have any documentation (I even had to decompile some Python bytecode to get some passwords we needed), version control system or a dedicated machine for testing/development. Everything was done live, in production.

So, yeah. You can do it, but it's miserable and, at least at first, nerve-racking. (At some point, you stop caring whether the platform lives or dies for a few minutes.) Glad I left. At least I learned about systems administration.