The most common argument against Linux security is exactly the largest argument for Linux security – that it's entirely open-source. With potentially the entire world with its eyes on Linux security, Linux has both the largest, most educated security team, and logically the most educated community of hackers, too.

Future Development

As if this isn't enough to soak in, we're now left to think about the future. As Microsoft has become increasingly dominated in the web hosting industry, we can expect future releases of Windows server to become increasingly like Linux with modular design; at least according to Microsoft representatives at last year's HostingCon.

In closing, if things continue on the course they're on now, it's also safe to assume that both sides will continue working to accommodate one another as much as possible, but your best bet is to pursue the type of web applications are important to you, as either side will probably be around for a long time. For open-source applications, your best choice will likely always be Linux, and for closed-source applications, Windows should remain a safe bet for years to come.