In this category, you can see all articles related to Unix or Linux operating System.
User & Group Management Stop getting locked out because you fat-fingered your own group membership 🧩 The Challenge You ever run usermod to add yourself to a new group, mistype...
Performance Monitoring & Tuning Stop wondering why your IO latency spikes during heavy swaps Technical Briefing | 9/20/2026 You see the system load average creep up, the disk queue depth...
Container Basics On Linux (Namespaces/Cgroups) Don’t let your process see what it’s not supposed to see 🧩 The Challenge You ever have a process you just need to isolate, but...
DevOps Tooling On Linux (CI/CD Runners, Ansible) Stop Ansible from hanging on your CI runners when a background task leaks Technical Briefing | 9/20/2026 We have all seen that CI...
Package Management (Apt/Dnf/Pacman Internals) Find out exactly which repo gave you that broken package version 🧩 The Challenge Dealing with a vendor repo that pushed a broken update and now...
Performance Tuning & Kernel Parameters (Sysctl) Stop letting your web server choke on too many half-open connections 🧩 The Challenge You’ve got a high-traffic app and suddenly it starts dropping...
Security Hardening (SELinux/AppArmor/Auditd) Don’t just audit2allow your SELinux problems away Technical Briefing | 9/20/2026 Most of us have been there: SELinux is on, it’s blocking your shiny new custom app...
User & Group Management Force users off their home directories when they just wont log out 🧩 The Challenge Dealing with a user account that has an open handle on...
Shell Scripting / Bash Tricks Stop the madness of parsing shell command output by hand 🧩 The Challenge You know that feeling when you’re writing a script, you run a...
Networking & Firewalls (Nftables/Iptables/WireGuard) Don’t let your nftables sets blow up when your VPN client restarts Technical Briefing | 9/19/2026 WireGuard is great because it is quiet, but that silence...