I'm learning Linux and want to turn a mini PC into a small virtualization lab. I'll mostly practice inside virtual machines and may eventually try building Linux From Scratch. I have a separate laptop for everyday use, so the mini PC can run primarily as a server.
The mini PC has an Intel i5 with 8 cores, 64 GB of RAM, and 2 TB of storage. I was considering Lubuntu as the host because it is lightweight, but I'm open to other suggestions. I'm also unsure whether VirtualBox is the best choice or whether I should use another platform.
How much RAM, CPU, and storage should I initially allocate to a virtual machine? Since the host will not be used for much besides virtualization, would assigning something like 48 GB of RAM, half the CPU cores, and about half the storage be reasonable? Any advice for setting up a flexible Linux practice lab would be appreciated.
3 Answers
Proxmox is another excellent fit here. It is based on Debian and is designed specifically as a virtualization host, with a convenient web interface for creating and managing virtual machines and containers. It keeps the host focused on virtualization rather than running a regular desktop, which makes resource management and administration simpler.
You could also install distributions directly on separate partitions and use a multiboot setup, especially with 2 TB of storage. That avoids virtualization overhead, but it is less convenient for running several systems at once and makes switching between environments more disruptive. For a learning lab, VMs are usually easier to reset, clone, and experiment with.
For a dedicated lab machine, I’d run it headless instead of installing a full desktop distribution. Debian Stable is a solid host, and Incus is a good alternative to VirtualBox for managing both containers and virtual machines. You can create reusable profiles for different workloads—for example, a lightweight server with 4 CPUs, 8 GB of RAM, and 25 GB of storage, or a desktop VM with more resources.
A bridged network lets guests appear on your home network like separate physical machines. You can then manage the host remotely and use tools such as virt-viewer or a web interface when you need to access a VM. QEMU/KVM-based tools also integrate more naturally with the Linux kernel than VirtualBox, whose modules can occasionally need attention after kernel updates.
Related Questions
Can't Load PhpMyadmin On After Server Update
Redirect www to non-www in Apache Conf
How To Check If Your SSL Cert Is SHA 1
Windows TrackPad Gestures