I am new at Linux administration. I created a new SSH user and password, and edited iptables to allow FTP access to my server. I am able to login with my user via FTP, however, when I try to upload files or create directories, I get "550 Permission Denied" errors. I am sure that it is similar a matter of permissions for my user account, but since I am new, I have no idea how to configure the permissions. Is there a certain config file that I need to edit?