Update Your Joomla Version 1.5.10 12 to 1.5.12 13 (latest version). Importent: before doing this backup your site!
=Step 2 - Download the Joomla patch=
*Download Joomla patch 1.5.10 12 to 1.5.1213.**<code>wget http://joomlacode.org/gf/download/frsrelease/1054810696/4131042205/Joomla_1.5.10_to_112_to_1.5.1213-Stable-Patch_Package.tar.gzbz2</code>
*Unpack the tar archive.
**<code>tar -zxvf jxvf Joomla_1.5.10_to_112_to_1.5.1213-Stable-Patch_Package.tar.gzbz2</code>
***You can type<code>ls</code> to list the files.
*Remove your downloaded patch.
**<code>rm -rf Joomla_1.5.10_to_112_to_1.5.1213-Stable-Patch_Package.tar.gzbz2</code>
***You can type<code>ls</code> to list the files.
<strong>Enjoy your updated Joomla version!</strong>