Fixed-size virtual disks generally perform better, but the difference is really only noticeable if you are creating a large drive. If you set the hard drive to dynamically allocated, VirtualBox will start the machine with a relatively small virtual hard drive that will grow as more space is needed (up to the maximum that you set). Next, VirtualBox will ask you if you would like the hard disk to be dynamically allocated or set at a fixed size. As we can see we have VirtualBox-6.1 available in repository, so to. Before start installing the virtualbox, first verify what exact version of VirtualBox is available in the repository, run sudo dnf search virtualbox. When asked what type of hard disk you want to create, just leave this setting at the default, VDI or VirtualBox disk image. Once all the dependencies are installed successfully then we are good to install latest virtualbox. Since this is going to be your first virtual machine, you want to select Create a virtual hard disk now. Related: Top Linux Operating Systems You Should Try in a Virtual Machine VirtualBox will then ask you if you want to create a virtual hard disk for your new virtual machine. You should not, however, assign more than half of your system's physical RAM to the virtual machine. If you have a large amount of RAM you may get better performance by raising the amount allocated to your guest system.

Install virtualbox on linux