If you have a Red Hat server use yum. apt-get is only for Debian, Ubuntu and some other related linux.
Why would you want to use apt-get anyway? (It seems like you know what yum is.)
If you insist on using yum, try yum install apt.As read on this site:Link
yum
yum install apt
I think you're running into problems because RedHat uses RPM for managing packages. Debian based systems use DEBs, which are managed with tools like apt.