5 posts
A segfaulting Docker service, an unlimited core ulimit, and a bind mount silently filled my server with crash dumps until SSH stopped working. Here is how I found it, fixed it, and made sure it never happens again.
A debugging story about running WSL Ubuntu off a flaky external HDD — a slow, fragile .zshrc that lost opencode from PATH, ext4 journal recovery eating the first boot, and 71 crash-orphaned junk files quietly piling up in $HOME.
A debugging story about orphaned processes, memory pressure, and the simple fixes that prevent long-running AI agents from silently consuming your server's RAM.
A real-world walkthrough of securing a production Ubuntu server — SSH hardening, fail2ban, firewalls, kernel tuning, Docker security, and the gaps I'm still fixing.
SSH stopped working. Telegram revoked my bot token. My AI assistant froze. It looked like an attack. The logs told a different story.