Continuous integration is a software engineering practice where developers frequently integrate code changes into a central repository. It aims to improve quality and reduce delivery time by implementing quality control checks at small increments rather than after all development is complete. Continuous integration tools like Jenkins can be configured through scripts to continuously build projects and send email notifications on failures to improve feedback loops.

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5. In software engineering, continuous integration (CI)
implements continuous processes of applying quality control — small pieces
of effort, applied frequently. Continuous integration aims to improve the
quality of software, and to reduce the time taken to deliver it, by replacing the
traditional practice of applying quality controlafter completing all
development.
ref : http://en.wikipedia.org/wiki/Continuous_integration
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21. //
hudson.model.Hudson.instance.items.each {
println "Job : ${it.name}"
//
def mailer =
it.publishersList.get(hudson.tasks.Mailer.class)
mailer?.recipients += ' foo@example.com'
}

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23. java -jar jenkins-cli.jar -s <url> <command>
(command : create-job, build, help)
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