11.04: Backup from, USB stick

Hello

I have an USB stick and it contains a JOOMLA website. I copied the website from the USB stick to the harddrive and made the following:

1. I changed the owner and the group by: sudo chown -R peter:peter /opt/lampp/htdocs/Alterssiedlung_im_Tal
2. I logged in by sudo -i
3. I changed to the website by cd /opt/lampp/htdocs/Alterssiedlung_im_Tal
4. I activated the two following commands:
    sudo find . -type f -exec chmod 644 {} \;
    sudo find . -type d -exec chmod 755 {} \;

Everything worked successfull. I started the XAMPP and in the Input bar of the browser I entered
http://localhost/Alterssiedlung_im_Tal/administrator/. And I got an error message: Database Error: Unable to connect to the Database: Could not connect to database

The apache server should run under the name peter. I started the command ps ax | grep apache and got the following:
peter@linux:~$ ps ax | grep apache
30667 pts/1 S+ 0:00 grep --color=auto apache

apache is written in red and peter is not mentioned. Maybe this is the problem?

I will be lucky if you can help. Thanks in advance.
Peter