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Ubuntu Unleashed 2013 Edition: Covering 12.10 and 13.04, Eighth Edition by Matthew Helmke

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juju

juju has been described as APT for the cloud. As you learned from Chapter 8, “Managing Software,” APT does an amazing job of installing, configuring, and starting complicated software stacks and services, but only as long as all of that happens on only one system. juju extends this ability across multiple machines. Often, Linux servers are set up for similar tasks. Multiple physical machines may be deployed with similar configurations to work with one another in a network, perhaps for load distribution or redundancy to prevent downtime in the event of one failing or being overloaded. Systems administrators are masters at creating and orchestrating these networks. However, doing so traditionally requires setting up each machine individually, ...

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