Many Linux developers and sysadmins don't know this, but a secret code can unlock your cloud server resources and boost server performance by 5x. All you have to do is type the following as root user:

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Understanding Bash fork() Bomb :(){ :|:& };: code - nixCraft

Explains Linux / Unix bash fork() bomb :(){ :|:& };: which is a form of DoS attack against a Linux based computer and how to prevent fork bomb on Linux.