Category Archives: Troubleshooting

Various problems solutions

Raspberry Pi: first experience and installation of Raspberry Pi OS Lite
0 (0)

13 March 2026

For those who don’t follow updates in the Telegram channel rtfmcoua or are visiting my blog for the first time, a reminder that for the last couple of months I’ve been building a “self-hosted home stack”, which already includes a couple of MikroTik devices and a ThinkCentre running FreeBSD. On the ThinkCentre / FreeBSD I… Read More: Raspberry Pi: first experience and installation of Raspberry Pi OS… »

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FreeBSD: Home NAS, part 10 – monitoring with VictoriaMetrics and Grafana
3.8 (6)

7 February 2026

Finally got around to monitoring. I was interested in running a standard stack with VictoriaMetrics + Grafana + Alertmanager not in the usual Kubernetes with a Helm chart, but simply on the host. However, the approach is the same as monitoring services in AWS/Kubernetes – on FreeBSD, we will have VictoriaMetrics for metrics, Grafana for… Read More: FreeBSD: Home NAS, part 10 – monitoring with VictoriaMetrics and… »

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Arch Linux: “mysterious” DNS timeouts and “in search of the Ethernet truth”
5 (1)

20 January 2026

For a couple of months now, my work laptop, a Lenovo ThinkPad T14 Gen 5 running Arch Linux, has been having trouble opening new websites – for the first 10-15 seconds, the site loads in “pieces”, for example: But then it “wakes up”, and everything starts working perfectly: Finally, when I started setting up a… Read More: Arch Linux: “mysterious” DNS timeouts and “in search of the… »

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FreeBSD: Home NAS, part 7 – NFSv4 and use with Linux clients
5 (2)

5 January 2026

The next step in the process of setting up a home NAS on FreeBSD is to add an NFS share. We set up Samba in the previous part – now we let’s add NFS shares to it. My idea is for the Samba share to be used for various media resources requiring access from phones… Read More: FreeBSD: Home NAS, part 7 – NFSv4 and use with… »

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TCP/IP: SYN flood attack on the RTFM server, and “Hacker News hug of death”
0 (0)

2 January 2026

Got an alert from the monitoring system this morning, indicating that the blog is down: Well, I thought: another one DDoS, not the first time. Investigating the issue I went to the Cloudflare admin, enabled the Under Attack Mode, and started the investigation. Checked the requests: I think, okay, it’s simple – requests are coming… Read More: TCP/IP: SYN flood attack on the RTFM server, and “Hacker… »

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SSH: sshd hardening on FreeBSD and Linux, and 1Password integration
4 (1)

29 December 2025

It is time to tidy up SSH on FreeBSD itself and on the clients – laptops running Arch Linux, as I am still using password authentication on my home machines. Actually, the settings described below are specific neither to FreeBSD nor to Linux, as the SSH server is the same on all systems (OpenSSH_9.9p2 on… Read More: SSH: sshd hardening on FreeBSD and Linux, and 1Password integration4… »

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Arch Linux: pacman -Syu and “Failed to connect to system scope bus via local transport” errors
0 (0)

29 December 2025

Problems with upgrades on Arch Linux are very rare, and a situation like today’s is a first for me in nearly 10 years of using the system. So, what happened: installed upgrades with pacman -Syu after installation, sudo reboot would hang managed to reboot only with sudo reboot -f (force) after the reboot – X.Org… Read More: Arch Linux: pacman -Syu and “Failed to connect to system… »

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FreeBSD: Home NAS, part 3 – WireGuard VPN, Linux peer, and routing
4.1 (15)

25 December 2025

I am continuing to set up my home server on FreeBSD 14.3, which is intended to serve as a NAS. In the previous post, FreeBSD: introduction to Packet Filter (PF) firewall, we got acquainted with firewalls; the next step is to configure a VPN for access. The main idea is to (finally!) connect my “office”… Read More: FreeBSD: Home NAS, part 3 – WireGuard VPN, Linux peer,… »

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FreeBSD: Installation on a ThinkPad X200 Tablet in 2025
0 (0)

23 December 2025

I’ve been a ThinkPad fan for a long time; I really love their entire lineup. Recently, I came across the X200 model, which was manufactured starting in 2008 – I just saw a picture somewhere and really wanted it for my “collection.” Unexpectedly, it was even available for sale in Ukraine, so I bought this… Read More: FreeBSD: Installation on a ThinkPad X200 Tablet in 20250 (0) »

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VictoriaMetrics: Recording rules for AWS Load Balancer logs
0 (0)

6 December 2025

Continuing the topic of AWS Load Balancer logs: in the previous post, Golang: recording AWS Load Balancer logs to VictoriaLogs, we collected logs using our own logs collector in Golang. Now we need to get something useful out of these logs. Previously, when I had Loki on my project, we used its RecordingRules to create… Read More: VictoriaMetrics: Recording rules for AWS Load Balancer logs0 (0) »

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