very useful for Linux training too
Since it is an unmanaged server I had to figure out how to do some stuff myself. Like adding an extra IP.
There is no documentation there about adding an IP.
But with having had a linode for about one month I had sufficient training with the documentation at Linode.com to do it myself on the dedicated server.
So the bottom line is that I would recommend having a Linode just for training purposes also.