Running a server completely headless is fine as long as the server boots and remote access is available (via ssh, rdp, vnc or similar). I have a HP mediasmart EX490 server which has no VGA output (though it is possible to get a VGA/PS2 connection with a debug cable). These are some tips for running the EX490 completely headless with Ubuntu.
HP EX490/EX495 MediaSmart servers were at one time very popular option for a home server. These 4-bay home servers came with Microsoft Windows Home Server V1 as the operating system. It was a very small (even smaller than the newer Gen8 ProLiant Microserver) yet feature rich home server. I bought mine in 2011. This post is about some history of the upgrade path of my EX490 and a recent update to a 6TB GPT boot disk.
Recently I migrated my blogs from AWS EC2 micro instance to a DigitalOcean 512MB VPS. Migration was surprisingly easy. All I had to do was sync everything from EC2 instance to DigitalOcean VPS using rsync provided I use Ubuntu 12.04 LTS server on both locations. This is what I did step-by-step.
Here I describe the process of how to install Eigen with Microsoft Visual Studio 2010 Express and 64bit compilers from Microsoft Windows SDK 7.1 supporting OpenMP and vectorization with SSE2. All these tools are free.