oshogbo

oshogbo//vx

GEOM NOP

Sometimes while testing file systems or applications you want to simulate some errors on the disk level. The first time I heard about this need was from Baptiste Daroussin during his presentation at AsiaBSDCon 2016. He mentioned how they had built a test lab with it. The same need was recently discussed during the PGCon 2019, to test a PostgreSQL instance. If you are FreeBSD user, I have great news for you: there is a GEOM provider which allows you to simulate a failing device.

𝚟𝚎𝚛𝚖𝚊𝚍𝚎𝚗

Crucial FreeBSD Toolkit

While FreeBSD is similar in many concepts to other UNIX systems or to Linux – its good to know exact commands and solutions for various needs. Today I would like to share all of them – …

oshogbo//vx

Teaching ZFS about time

ZFS is a robust file system, in large part thanks to its copy-on-write design. Problems can still show up: flaky cables, dying drives, or the occasional cosmic ray flipping a bit. For exactly those situations ZFS has a feature called scrub. Scrub walks every used block starting from the uberblock and compares the stored checksum against the data on disk.

Scissor

Scissor - vector design in your browser

A vector design editor that runs entirely in your browser. Draw, edit and export without uploading anything.

Making sure you're not a bot!

Mark notifications with the source qube's colour by oshogbo · Pull Request #19 · QubesOS/qubes-notification-proxy

This is what I got: Closes QubesOS/qubes-issues#9648

Brood War Bench

Which model wins at Brood War? Results, recordings, costs, and game-by-game analysis of Codex, Claude, and Grok across 171 matches.

oshogbo//vx

Hunting Memory Leaks in bsnmpd with DTrace

One of my FreeBSD boxes runs `bsnmpd`, the base system SNMP daemon. The machine is on 15.0-p2, and the daemon kept growing until the kernel ran out of patience and OOM-killed it. That is not a good feature for a daemon. I could have just added a cron job to restart it and called it a day. But a leak that kills a long-running daemon is exactly the kind of thing I like to chase, and I already had a tool for it.

Google for Developers

Apps Script  |  Google for Developers

Develop high-quality, cloud-based solutions with ease.

oshogbo//vx

Confusion with used/free disk space in ZFS

I use ZFS extensively. ZFS is my favorite file system. I write articles and give lectures about it. I work with it every day. In traditional file systems we use df(1) to determine free space on partitions. We can also use du(1) to count the size of the files in the directory. But it’s different on ZFS and this is the most confusing thing EVER. I always forget which tool reports what disk space usage! Every time somebody asks me, I need to google it. For this reason I decided to document it here

Hassan (@nutlope) on X

How to train your own Jev for $17

Launching FreeBSD/EC2 desktop AMIs

oshogbo//vx

Don't Make ZFS Re-Read What It Just Read

I have already mentioned one of my improvements to scrub in an earlier post, Teaching ZFS about time. In that post I also claimed that scrub can be expensive, and that we were looking for ways to limit the amount of data we actually want to scrub. A scrub on a multi-petabyte pool can run for days, and some of us want a smaller, easier check that everything is still going right.

GitHub - GrecAndrei/ida-pro-mcp: Local-first, deterministic MCP server for IDA Pro/Home: 109 strict-schema reverse-engineering operations, evidence-backed findings, and policy-gated IDB edits.

Local-first, deterministic MCP server for IDA Pro/Home: 109 strict-schema reverse-engineering operations, evidence-backed findings, and policy-gated IDB edits. - GrecAndrei/ida-pro-mcp

oshogbo//vx

Suricata, Jumbo Frames, and netmap

One of my FreeBSD machines sits between the Internet and the rest of my network. I wanted Suricata to monitor traffic arriving on four of the machine's interfaces and complain when something looks wrong. I started with one interface, `mce1`, and planned to add the other three after capture worked. The capture interfaces are backed by Mellanox ConnectX adapters handled by the mlx5en driver, and they use a jumbo-frame MTU of 9000 bytes.