changing an owner of php scripts and upload directory HELP

I keep getting this error when I try to upload something to Wordpress… I searched through wordpress support forums and the only thing that i can come up with is its something to do with my server…. I did just set up my linode so Im hoping I didnt do something wrong… this is the error im getting :

Unable to create directory /srv/www/blokmovaz.com/public_html/wp-content/uploads/. Is its parent directory writable by the server?

From the wordpress support forums I determined this is most likly my problem:

"php safe mode won’t let you create files or directories if your php scripts and upload directory belongs to different users. So there are 2 possible solutions: either disable php safemode (not recommended), or change an owner of scripts and upload directory"

How do I go about changing the script?