Downloaded VirtualBox. In the process of downloading CentOS. Already downloaded nethserver and wazo. Currently downloading FreePBX and VyOS. Anything else to consider?
End goal is to familiarize myself with open source systems that would be commonly seen in an enterprise environment and how to best administer them. Some of the resources that I am planning on using is @scottalanmiller SAM: Learning Linux System Administration and @JaredBusch FreePBX 13 Setup Guide
Well, scrap that idea for now. My Lenovo T540p won't handle a Type-2 hypervisor. It handles everything as 32-bit and everything that I am finding is only in 64-bit.
There's one old issue with VirtualBox in case you have the Hyper-V role activated: It won't allow you to run 64 bit guests while 32 bit guests will work just fine. Disable the Hyper-V role et voila, you're now able to run 64 bit guests with VirtualBox. See here for more details: http://superuser.com/questions/866962/why-does-virtualbox-only-have-32-bit-option-no-64-bit-option-on-windows-7