Quantum5
quantum5.ca · Personal blog · on HN since 2022
Quantum5 is a personal technical blog on networking, BGP and running an ASN, Linux containers, storage, and hardware repair.
What HN saysCommenters point to its BGP and ASN articles as useful reading for people who know routing, and discuss its systemd-nspawn piece.
16HN people shared it
3linked it in comments
20stories submitted
350story points
3 months agolast shared
2022people per year2026
Most-shared posts
- 1What I wish I knew when I got my ASN3 people · 2 points · first shared 2023 · discussion on HN
- 2Fixing a Bricked Framework Laptop2 people · 22 points · first shared 2026 · 6 comments on HN
- 3Using astronomy to calculate the French Republican Calendar2 people · 6 points · first shared 2022 · discussion on HN
- 4Simple NDP Proxy to Route Your IPv6 VPN Addresses (2019)2 people · 3 points · first shared 2024 · discussion on HN
- 5A whirlwind tour of systemd-nspawn containers (2025)2 people · 1 points · first shared 2025 · discussion on HN
- 6Fast and cheap bulk storage: using LVM to cache HDDs on SSDs1 people · 223 points · first shared 2025 · 88 comments on HN
- 7An Introduction to BGP from the operator of a small AS1 people · 60 points · first shared 2024 · 3 comments on HN
- 8Docker Considered Harmful (2025)1 people · 19 points · first shared 2025 · 10 comments on HN
- 9The Art of Time-Keeping, Part 2: Time1 people · 3 points · first shared 2022 · discussion on HN
- 10Journey and lessons from running a mirroring service at home1 people · 2 points · first shared 2023 · discussion on HN
- 11Custom mechanical keyboard: OS-specific custom RGB lighting with QMK1 people · 2 points · first shared 2025 · discussion on HN
- 12Microsecond Accurate Time Synchronization on LAN with PTP1 people · 2 points · first shared 2023 · discussion on HN
- 13DIY a Stratum 1 NTP Server with a Serial Port1 people · 2 points · first shared 2023 · discussion on HN
- 14On BGP Route Selection and High Availability via Anycast1 people · 1 points · first shared 2023 · discussion on HN
- 15ARM Assembly: ∞ Ways to Return (2017)1 people · 1 points · first shared 2023 · discussion on HN
What HN people wrote when they linked it
jauntywundrkind · 2025-09-07
It'd be cool to see a nice UI (like this) atop something a little better built out & defined like systemd-nspawn. Like Quadlet for containers, Nspawn for VMs is a nice base with tons of great capabilities & very standard management patterns. There's nice .nspawn files and drop ins, where config lies, and (semi) standard paths for mounts and machines. Having that stable standard base would raise my interest & confidence a lot.
This recent guide covers a ton of nitty gritty, down to baking your own vm images & doing everything by hand. But by half way through, it builda to using the nice machinectl cli that is the real meat of the experience. https://quantum5.ca/2025/03/22/whirlwind-tour-of-systemd-nspawn-contai…
zamadatix · 2024-10-25
For anyone who felt "this is more about what routing than BGP" the next article linked at the end starts to really dive into the BGP parts and can be started directly from if you're familiar with any form of routing: https://quantum5.ca/2023/07/19/diving-into-autonomous-systems/
zX41ZdbW · 2023-10-18
Good article on this topic: https://quantum5.ca/2023/10/10/what-i-wish-i-knew-when-i-got-my-asn/
Recently, I've created an interactive map of all IPv4 addresses, PTAL: https://reversedns.space/