non-root user should not see files or folders in Linux

Dear Experts,

I have a requirement that non-root user should not see all the files or directory in Linux Operating systems.  If a directory or file is created with root user then only root user should see the directory of files. No other user should see the files.

Example:

In this example,  I am logged in with OS user oracle, but I can see all the files owned by root.  My requiment is that I want to restrict the non root user to see all the files owned by other users.

[oracle@rpm /]$ ll

total 216

drwxrwxrwx   5 root root  4096 Apr 26  2013 backups