Using ubuntu 10.4. Followed the directions here (http://omeka.org/codex/Install_on_Ubuntu) without any error messages. When I try to browse to http://localhost/Omeka, I get the following error messages and would appreciate knowing what I need to do to fix it.
Before installation can continue, the following errors must be resolved:
1.Archive directory not writable
The following directory must be writable by your web server before installing Omeka: /var/www/Omeka/archive
2. Archive directory not writable
The following directory must be writable by your web server before installing Omeka: /var/www/Omeka/archive/files
3. Archive directory not writable
The following directory must be writable by your web server before installing Omeka: /var/www/Omeka/archive/fullsize
4. Archive directory not writable
The following directory must be writable by your web server before installing Omeka: /var/www/Omeka/archive/thumbnails
5. Archive directory not writable
The following directory must be writable by your web server before installing Omeka: /var/www/Omeka/archive/square_thumbnails