You know why Linux is attacked so much? Back in 1999, many companies wanted Linux.
So they hired UNIX people to install in on them. Problem is, they didn't talk to those UNIX people again, hired some shithead for networking with MCSE, saw that Linux was working fine, and was affraid to touch it, because otherwise, they had a problem with their boss. Plus, it was working just fine.
Linux needs to be updated at least once a month, and that's not even enough when you're running some kind of web server on it.
So all those Linux configurations "working fine" are an easy target for crackers.