Pluggable authentication models (PAM) allow you to configure your Linux environment to meet your own particular security needs.
This sample chapter from Real World Linux Security: Intrusion Prevention, Detection and Recovery teaches you how to regain control of your system if it is cracked, and how to prevent future security breaches.
New Mac OS X Means New Tricks...
Wow, who abducted our Windows 10 assumptions and left this smooth running and easy-to-use Operating System in their place?
Just got notice that Microsoft is making a full-featured version of Visual Studio available--for free. Traenk is happy.