I tried to migrate my Joomla 1.7 website to Joomla 2.5.14 stable version. But when I look for updates in admin end, it shows there is not updates found for new release. I couldn't find any upgrade patch, so I simply follow the below steps.
- Take backup of Joomla 1.7 website including DB for safety.
- Download new Joomla 2.5.14 and extract the files.
- Copy all the files from Joomla 2.5.14.
- Paste all the files to Joomla 1.7 (it must overwrite with existing files, do not delete all of the files from Joomla 1.7).
- No need to modify the database.
- And finally check admin end by login and preview your site.
This is a good start.
After that sometimes I have found that going to extensions -> db -> fix had some work to do.
This will get Joomla up to date (although you will have some leftover files, not a big deal). But it will not install the new features such as Joomla update icon in the control panel.
In order to do that you need to repackage the extensions, remove the files from the installation, and reinstall. It may take a few tries (you need to remove the language files and any off-folder files as well, either from the disk - and putting them in the installation zip - or from the
.xmlmanifest.The three extensions I found I wanted most were
com_joomlaupdate, and theextensionupdateandjoomlaupdateplugins. You can download them from this page: it also contains the list of files which you should delete: