In this category, you can see all articles related to Unix or Linux operating System.
Performance Tuning & Kernel Parameters (Sysctl) Stop letting your kernel drop packets before your app even sees them 🧩 The Challenge Dealing with a high-traffic API server that just starts...
Container Basics On Linux (Namespaces/Cgroups) Quick Sandbox: Run Commands in Their Own Isolated World 🧩 The Challenge Ever just wanted to run a single command or a small script in...
Networking & Firewalls (Nftables/Iptables/WireGuard) When your WireGuard handshake succeeds but your traffic hits a black hole Technical Briefing | 9/18/2026 You check wg show and everything looks perfect. The handshake...
Environment & Shell Customization (Aliases/Functions/.Bashrc) Stop wasting time hunting for your own command history 🧩 The Challenge You know you ran that exact convoluted find command three days ago, but...
Shell Scripting & Automation Shell Scripts: Don’t Let Your Temp Files Become a Mess (or a Danger) Technical Briefing | 9/18/2026 Every sysadmin has written a script that needs a...
Package Management (Apt/Dnf/Pacman Internals) Stop hunting for ghost files after a partial package upgrade 🧩 The Challenge You ever run an update, it fails halfway through because of a power...
Cloud-Native Linux (Cloud-Init, Immutable OS, Bootc) Stop fighting drift and start treating your OS like a container image Technical Briefing | 9/18/2026 Most of us spent a decade babysitting configuration...
Backup & Recovery (Rsync/Tar/Dd) Stop stressing over tar failing halfway through your backups 🧩 The Challenge You know that sinking feeling when a massive tar job hits a file that’s...
Disk & Filesystem Management (Du/Df/Lsblk/Fstrim) Stop playing detective with zombie deleted files 🧩 The Challenge You ever run df and see a partition at 100% capacity, but then you run...
Security Hardening (SELinux/AppArmor/Auditd) Stop setting SELinux to Permissive just because you are annoyed Technical Briefing | 9/17/2026 We have all been there. You deploy a custom application, the service fails...