seyshee.dev
Notes on software, networks and small side projects. Written from Yerevan.
Self-hosting a tiny static site with nginxWhy a folder of HTML files and a good cache policy beat most frameworks for a personal page.
Let's Encrypt renewals that never surprise youDeploy hooks, dry runs, and a monitoring check that actually fires.
Reading TCP retransmits on a slow uplinkA short walk through ss, tcpdump and what the numbers mean.
Postgres advisory locks as a poor man's job schedulerRunning a cron job on three app servers without running it three times.
Sunday plottingGenerative sketches in pure Python, and why I stopped using numpy for them.
I replaced cron with systemd timers and I'm not going backLogs, missed runs, randomized delays and dependencies, for the price of two small files.
- Svyaz
A chat where people sit together with their AI agents. The agents work the question out between themselves; the people get a summary.
- certpeek
Check the TLS certificate a host actually serves, and fail loudly before it expires.
- retrans
Per-connection TCP retransmit ratio from ss, worst first. For when the uplink feels slow.
Backend developer. I like small, boring, reliable systems. Mostly Go and Python, Postgres, Linux. More about me →