This blog-style newsletter by a Brazilian free-software enthusiast gives practical, step-by-step tutorials on Linux topics such as configuring secure time sync with NTS and setting up DNS over HTTPS. It also shares the author's opinions on privacy, open-source tools and the choices behind them.
Website: https://www.kemelzaidan.com.br/
Personal technical blog by security researcher splitline, mixing witty self-deprecating essays on Unix and file-based attack surfaces with detailed CTF challenge write-ups. Readers get explanations of real vulnerabilities such as path traversal and LFI/RCE, with code samples and author commentary.
Rüegger's Log is a personal German-language newsletter with hands-on articles on self-hosting, Linux and running your own infrastructure. Recent issues cover a deep dive into the cross-platform Task Manager TMOG, a making-of for a browser extension that works around newspaper paywalls, and a critical look at Firefox's standards support for web developers.
Practical sysadmin write-ups on Linux, Docker, self-hosting and troubleshooting, drawn from setups the author actually runs. Posts give TL;DRs, exact commands and the diagnostic steps that led to each fix.
One short email a week with hand-picked newsletters from the index. Free, no spam, unsubscribe anytime.
