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1.1 Who needs that

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The short answer is everybody, or everybody managing a server. Here are some applications:

  • Hosting: Complete general purpose hosting (Running many independent servers in one box).
  • Experimentation: You are toying with a new services and do not want to impact the production services on the same machine.
  • Education: Each student has its own server with root password.
  • Personal security box: Run un-trusted applications with complete control over their interaction with the rest of the computer and the network.
  • Managing several "versions" of the same server/project and turning on/off each version independantly.

Just think about all the viruses and worms out there, you end up with a big everybody using a computer needs this. :-)

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