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Web Hosting and Cloud Computing Control Panels
Howdy,
There are instructions for installing Joomla here:
https://docs.joomla.org/J3.x:Installing_Joomla
You would want to put the install files somewhere under the dir "/home/USERNAME/public_html".
If you run into problems, let us know what issue you are seeing, including any error messages you receive. You can see the Apache error logs in $HOME/logs/error_log.
-Eric