And the bottom line is the process of testing depends on luck
"Program testing can be used to show the presence of bugs, but never to show their absence!" - Edsger W. Dijkstra
A major break with this tradition came in the 1980s when the fourth Labour and fourth National governments enacted a series of reforms based on free market ideology. This reinforced many New Zealanders' distrust of intellectual theory, as many consider that the reforms increased poverty and inequality in New Zealand.
They're just scared of what's happening to the other "intellectual" nations, that's all.
So what the hell is Windows and OSX?
Exactly the question I've been asking myself my whole life...
My home server (P4, by the way) was running headless and I was afraid I can lock myself out (wrong iptables rule or something) or the IP address settings could get screwed up, etc. etc. I don't even have a monitor, so inserting the graphics card back in isn't an option.
The solution was a USB thumb drive I had, and a modified udev script for mass storage, so it would execute a shell script with a particular name from the root folder of the drive. If something did get screwed up, you just open your text editor, write the commands to be executed, and save it on your flash drive. You even can redirect standard output to a file on the drive.
It kept me safe for years, although if udev can't start, you may have a problem