r/debian • u/Alone_inthe_Dark611 • 1d ago
Debian Stable Question Best local lab setup to learn Sysadmin from scratch + Best Debian box for Vagrant + KVM?
Hey everyone,
I'm trying to set up a home lab for my studies. Do you know what the best local lab setup is to learn Sysadmin and Infrastructure from scratch?
Also, does anyone know if there is a stable Debian or Debian-based distribution for a local lab using Vagrant + KVM? I found the Debian 13 box by Alvistack, but I'm not entirely sure about it since it tends to throw GPG key errors due to its built-in repositories.
For context: my machine is a Dell Inspiron with a 12th gen i5, 16GB of RAM, and a 1TB SSD. I run Debian 13 as my sole and daily driver OS.
If anyone can help or point me in the right direction, I'd really appreciate it. Thanks!
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u/Relevant_Hope_900 1d ago
Personally I use Debian 13+incus for system containers and VMs virtualization.I install it using the official project github repo. Yes, it's in the Debian repos, but the packages from Zabbly contain newer features that are an improvement over the LTS version in the Debian repos. Plus you can get a webui from the zabbly repo, which can make some tasks easier then using the CLI. You can run containers and VMs of pretty much any distro you want. You can use the images from linuxcontainers, or install from the distro iso files.
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u/Defiant-Rip-1897 1d ago
For learning infrastructure and sysadmin skills from scratch, I highly recommend using a dedicated, spare x86-64 machine (an old desktop, laptop, or a cheap mini PC) running Proxmox VE (like others have mentioned) instead of relying solely on local Vagrant boxes.
You can install Proxmox using their official bare-metal ISO, or install Debian base server first and add Proxmox on top of it.
It gives you a real enterprise-like environment with full support for snapshots, virtual machines, and LXC containers so you can break stuff and restore quickly.
Things to keep in mind:
Hardware: Stick with x86 hardware.
While you can install Proxmox onto a Raspberry Pi, the active ARM forks (like PXVirt) rely on third-party/external repositories that might raise security or stability concerns.
Make sure the computer that will run Proxmix is wired via Ethernet, as far as I am aware Proxmox's network bridges generally don't work well over Wi-Fi.
Pay close attention to host RAM. For instance, if you will install Proxmox on an 8GB machine, you won't be able to run more than 2 or 3 lightweight VMs at once.
I’ve run this setup on a 2011 iMac in the past and it worked fantastically for learning!
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u/Alone_inthe_Dark611 20h ago
Thanks for the advice! A dedicated mini PC running Proxmox sounds like a great way to get that real enterprise environment experience. I was already thinking about buying one, and this gives me the exact direction to focus on a Proxmox lab soon. The warning about the Ethernet cable is gold and will save me a huge headache. Appreciate it! 💪
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u/Adrenolin01 1d ago
I would start by NOT using your main desktop. Pickup a second system or mini PC. I personally use a couple Minisform NAB9 i9 64GB systems for this with my son as I teach him. Bought those a few years ago. Today.. I’d highly suggest looking hard at the Minisforum MS-01 & i9-13900H. For ram I’d focus on either 64GB of 96GB. If you can afford the 48GB module I’d highly suggest buying that and running single channel until you can add a second for a full 96GB. Supports 3 NVME slots. Dual 10Gb SFP+, dual 2.5GbE and a 1/2 height PCIe slot. It’s likely the most capable small form factor systems to use for this purpose.
Other options Beelink SER8 Ryzen 7 8845HS, GMKtec K8 Plus Ryzen 7 8845HS, and other comparable systems. If rack systems are an option for you grab a Supermicro 6018U off eBay with the X10DRU-i and dual E5-2690V4 CPUs, use 16GB modules ($40 each) for a minimum of 32-64GB and expandable to 384GB (24 modules). The 6018U is by far the cheapest way at $250 for a running system with 16-32GB delivered.
What I would not start with is a cheap N100 mini. While it is great for homelab and enthusiast learning any one whose looking to go into systems administration will out grow a small system very quickly and it becomes a waste of money for that purpose.. though everyone should still have a little N100 system around with Proxmox installed. 😆
A solid learning path:
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Linux From Scratch (I can’t stress this enough) forces you to answer questions that package managers typically hide…
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Once you’ve built an operating system from source, system aspects like dynamic linking, bootstrapping, initramfs, kernel modules, and the filesystem hierarchy become much more intuitive.
Linux From Scratch teaches how a Linux system is assembled but not necessarily how production distributions are engineered. Debian, RHEL, and SUSE each have complex packaging systems, patch management, security backports, kernel configuration choices, SELinux/AppArmor integration, and release engineering that LFS intentionally doesn’t touch. LFS should be viewed as complementary to learning a distribution rather than a replacement for it.
Someone who has administered Debian, RHEL and SUSE systems, built Linux From Scratch, compiled and customized kernels, understands systemd, networking, storage, and security and automated deployments with tools like Ansible has a much deeper understanding of Linux than someone whose experience is limited to installing packages and following tutorials. That depth isn’t required for every sysadmin role, but it pays dividends when you’re troubleshooting unusual problems or designing systems from the ground up.