Beginner's Guide

Does your server environment meet the minimum requirements for Joomla 2.5?
PHP, version 5.2.4 or higher
(Not for Joomla 1.7 but for the upgrade component, you will7need the CURL module in PHP.)
MySQL, version 5.0.4 or higher
Are all the installed extensions available!for Joomla 2.5?
Have a look at the extension directory extensions
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.
Is the installed template available! for Joomla 2.5, or are you able to change it
manually?
Here is a good presentation by Chris Davenport
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. It's about Joomla 1.6 but in general, nothing
“important” changed in Joomla 2.5.
Are you experienced enough to change small snippets of code with instruction :-)?
If you feel comfortable and answered all the questions with yes ... let's go!
Step 1: Back-up
Before you do anything else, please do a backup of your site. You are probably already using Akeeba
Backup
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. If not, install it and do a back-up of your site!
Step 2: Create a local copy of your site
If you set up a local copy manually, you will need to
copy your files
dump your MySQL database, create a local database and import the dump into the local one
change configuration.php
You can also implement the process with Akeeba backup, which allows you to create a zip package of
your site. To again create a website from this package, you will need the Akeeba Kickstarter.
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Place the kickstart files and the zip package of your website in the local folder of your website (htdocs).
Create an empty database for your Joomla 1.5
Joomla! 2.5 - Beginner’s Guide
Monday, 30 January 2012! Page 240
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http://extensions.joomla.org/extensions/advanced-search-results/524478
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http://www.slideshare.net/chrisdavenport/template-changes-for-joomla-16
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http://extensions.joomla.org/extensions/access-a-security/site-security/backup/1606
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http://www.akeebabackup.com