Linux was just an example, in fact I'd guess that there's probably a lot of BSD variants out there with ridiculous uptimes. I think the 'allows user access' bi

Linux was just an example, in fact I'd guess that there's probably a lot of BSD variants out there with ridiculous uptimes. I think the 'allows user access' bit is the thing that would limit safe uptimes the most, since once you're logged in to a box, the kernel surface area for attacks is much larger.