How to Update Joomla 1.5 Versions

How to Update Joomla 1.5 Versions: "Now, let's say you're running Joomla! 1.5.3 and you want to update to Joomla! 1.5.7
You can access the Joomla! update listing at http://joomlacode.org/gf/project/joomla/frs/. Copy the link location to Joomla_1.5.3_to_1.5.7-Stable-Patch_Package.tar.gz and type:
wget http://joomlacode.org/gf/download/frsrelease/8375/31007/Joomla_1.5.3_to_1.5.7-Stable-Patch_Package.tar.gz

wget is a command to download a package file from another server to your server.

Now type:
gzip -d Joomla_1.5.3_to_1.5.7-Stable-Patch_Package.tar.gz
The tar.gz file now has a .tar extension so type:
tar -xvf Joomla_1.5.3_to_1.5.7-Stable-Patch_Package.tar

The package is extracted and Joomla! is updated. If all goes well and Joomla! appears to be stable, you can delete the site_backup.tar file form your server."