With the bare board, you need a minimum of an SD card and access to the network with a wireless key or ethernet cable to access SSH on your desktop PC with "Putty" for example, the terminal appear in a window in Windows or Mac.
Of course, it is possible with its HDMI and four USB plug a monitor, keyboard, mouse, wifi dongle, a USB key etc ..
Linux commands is like the bike it does not normally forget if you have ever used a distribution.
And for those who have no concept of a command line in the terminal window, then it will be enough to send the X desktop and work with the mouse, everything is almost.
In short, enthusiasts and also the curious will not regret the few dollars invested in this PC nano.
And those who have experienced the period of Sinclair ZX81 can get an idea of the infinite pleasure they will have to manage the "raspberry."