[1]You have a spare computer, you know that Joomla is a fairly powerful CMS, that Ubuntu is a really nice Linux distribution, and you’d like to combine all these things. So here is how it’s being done:
Make sure you are firewalled
We are going to install various services that can be accessed from users all over your network. However, I assume you want to keep out unwanted guests from the internet. Before you proceed, make sure that all ports are firewalled that connect you with the internet and no critical forwarding is active.
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http://www.parcival.org/2006/07/14/howto-install-joomla-on-your-very-own... [2]