ClearOS 7, Community Edition is an open-source, linux server operating system. This edition is built for linux experts and hobbyists who enjoy bleeding edge code, and contributing to a community of global users with suggestions and forums support. All updates, bug fixes, patches and security fixes are provided free (albeit untested) from upstream sources. Features span 75+ IT functions from domain control, network & bandwidth control, messaging and more!
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Link:- http://www.mirrorservice.org/sites/clearfoundation.com/7/iso/x86_64/ClearOS-DVD-x86_64.iso