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Wow, it really works! It's time to install the CMS, just download it from the site and put the archive in your server. At writing moment it was Joomla_3-7.2-Stable-Full_Package.zip (https://downloads.joomla.org/cms/joomla3/3-7-2)
Now just unpack it into the root directory of the Web server (it should be /var/www/html if you did not change it):
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Here's it:
That's all, good luck