Ubuntu’s Kernel Security Gap: The Cost of Waiting for a Fix
CVE-2026-98432 reveals a troubling gap between a ready upstream Linux fix and Ubuntu's normal update channels. Explore the vulnerability, Ca...
Nov 3, 2026
6 min
Why Your Cron Job Fires at the Wrong Time: IST, UTC and the Midnight Day Shift
I scheduled a job for 9 PM IST and it ran at 2:30 AM. Cron uses the server's timezone, and most servers run UTC. Here's how the offset, the ...
Nov 3, 2026
6 min
Linux, Shell & Docker: The Daily Toolkit
Most AI work happens in a terminal on Linux, often inside containers. This post covers navigating, searching logs, permissions, processes, s...
Nov 2, 2026
23 min
How to Create Your Own Private VPN Using a Low-Cost VPS
Build your own private VPN without an expensive subscription. Configure WireGuard on an Ubuntu VPS, connect your devices, encrypt internet t...
Oct 31, 2026
10 min
Harden a Fresh VPS in 15 Minutes: SSH Keys, Firewall, Fail2ban and Auto-Updates
A new VPS gets scanned by bots almost immediately. Here's the checklist I'd run on a fresh Ubuntu or Debian server: a sudo user, SSH keys, a...
Oct 28, 2026
10 min
How to Allow SSH Login From Only Your IP on a VPS (Without Locking Yourself Out)
Leaving SSH open to the whole internet invites constant bot attempts. Here's how to restrict VPS login to one trusted IP with UFW, firewalld...
Oct 27, 2026
10 min
A Mail App for Linux That Answers Only to You
Open your email client and ask yourself a question most of us never do: who else is in the room?
Oct 7, 2026
4 min
1,313 Kernel CVEs in One Debian Update: Alarm Bell or Accounting Quirk?
Debian's latest kernel update fixes 1,313 CVEs at once. Why so many? The kernel issues CVEs for nearly every bug fix, Debian batches its upd...
Oct 2, 2026
7 min
How to Build an Online Judge, Part 2: Python Subprocesses Explained
Learn how one python program start another, supplies the input to consumer program, captures its output and handle timeout. 1. Why are subpr...
Sep 18, 2026
7 min