vsftpd ftp server

Hi I am using the vsftpd ftp server.

I am using it for the wordpress that I run.
The folder /var/www/wordpress/wp-content has only root write permission.
No one else has right permission to it.

I want to give the vsftpd ftp also write permission for it.
But no other user should have that permission (except from the root).

Is there specific user for this ftp server?

I don`t know on Ubuntu but the deamon itself should use user vsftpd( check /etc/passwd) however this won`t give you access to the files. You need to setup new user - wwwpress for example setup his home directory as /var/www/wordpress/

Change the owner of the files in the wordpress install dir

chown -R wwwpress:wwwpress /var/www/wordpress/ 

And then ftp in with wwwpress. That way user wwwpress will be able to modify the wordpress files and your wordpress instance will remain protected.

p.s. You can set up the user by issuing

useradd --no-create-home --home-dir /var/www/wordpress --shell /bin/false wwwpress