In Fedora, ramdisks are not created by default as is the case with RHEL. So, if you need to get Ramdisks on Fedora, then you can do this:
sudo yum install MAKEDEV
This will create some default Ramdisk’s in the “/dev” directory. Now, if you need to change anything then feel free to go to “/etc/makedev.d” and feel free to change these files.