When I worked at a university, one of our linux web servers crashed one day. In place of /dev/null was a history file. The last entry?

mv .bash_history /dev/null

Ah, script kiddies...

On Dec 26, 2011 3:28 PM, "A. P. Garcia" <a.phillip.garcia@gmail.com> wrote:
On Mon, Dec 26, 2011 at 3:11 PM, Warren Toomey <wkt@tuhs.org> wrote:
On Sun, Dec 25, 2011 at 08:10:04AM -0500, Norman Wilson wrote:
> Rather a nice tribute to Dennis and C, published
> in the New York Times Magazine:
>
> http://www.nytimes.com/interactive/2011/12/22/magazine/the-lives-they-lived.html?ref=magazine#view=dennis_ritchie

> Yes, a good reminder on the power that programming brings us. A question
> though: what command would "bring the system down"?

anything that consumes too many resources, i suppose. the morris worm would have several copies of itself running on the same machine running a password cracker, using up all the cpu and bringing the system to its knees. hog too much memory and you could run into thrashing. even more evil things may include a fork bomb, perhaps? or emacs? ;-)