Stop trying to edit config files with sed in place without a backup
Text Processing (Grep/Sed/Awk) Stop trying to edit config files with sed in place without a backup 🧩 The Challenge Everyone has nuked a production config file because they made a...
Category: Linux/Unix
In this category, you can see all articles related to Unix or Linux operating System.
-
-
Stop your bash scripts from puking when variables are unset
Shell Scripting / Bash Tricks Stop your bash scripts from puking when variables are unset 🧩 The Challenge You finally finish a long script, run it in production, and it...
-
Stop Time Drift From Sneaking Up On Your KVM Guests
Virtualization (KVM/QEMU/Libvirt) Stop Time Drift From Sneaking Up On Your KVM Guests Technical Briefing | 9/2/2026 You’ve got your KVM guests running, `chronyd` installed inside, and you probably think time...
-
Stop guessing why your system is thrashing when load average lies to you
Process & Resource Monitoring (Top/Htop/Ps/Systemd) Stop guessing why your system is thrashing when load average lies to you 🧩 The Challenge You look at the load average, see a 12.0,...
-
Digging Into Network Namespaces Without Docker
Container Basics On Linux (Namespaces/Cgroups) Digging Into Network Namespaces Without Docker 🧩 The Challenge You’re troubleshooting a tricky network issue and suspect your container is doing something weird, but all...
-
Stop killing your production sessions when you misclick
Environment & Shell Customization (Aliases/Functions/.Bashrc) Stop killing your production sessions when you misclick 🧩 The Challenge We have all done it. You meant to type exit to close a single...
-
Stop wasting time cleaning up your bash temporary files
Shell Scripting / Bash Tricks Stop wasting time cleaning up your bash temporary files 🧩 The Challenge You know that feeling when your /tmp directory is littered with hundreds of...
-
Stop the permission headache with sticky bits on shared folders
Permissions & Security (Chmod/Chown/ACLs/SELinux/AppArmor) Stop the permission headache with sticky bits on shared folders 🧩 The Challenge You know that fun moment when you open a shared project directory and...
-
Stop libvirt from burning your CPU cycles on polling
Virtualization (KVM/QEMU/Libvirt) Stop libvirt from burning your CPU cycles on polling Technical Briefing | 9/1/2026 Most of us think of KVM as a set-and-forget layer, but if you look at...
-
Stop being the last one to know when a user changes their password
User & Group Management Stop being the last one to know when a user changes their password 🧩 The Challenge You ever have a junior dev complain they can’t log...