Fork system bomb

This bomb is a command line, as shown below:

:() {:| :&};:

I would like to warn you not to execute this command in your Unix/Linux or cygwin shell. Otherwise, this command keeps Fork sub-processes until your entire system cannot respond.   Warn you again, please do not execute this command unless you want to restart your system. In addition, I don't need to talk about the actual meaning of shell. If you don't know, go ahead and look at what man bash says. (This article is also published in "cool shell": http://cocre.com /)