Permissions & Security (Chmod/Chown/ACLs/SELinux/AppArmor) Stop files from keeping their original owners when you move them 🧩 The Challenge Moving files between directories with different user IDs usually turns into a...
Backup, Snapshotting & Disaster Recovery Stop treating your ZFS snapshots like a primary backup strategy Technical Briefing | 11/1/2026 I see it all the time. A junior admin sets up...
Disk & Filesystem Management (Du/Df/Lsblk/Fstrim) Spotting the exact LVM partition backing your mount point 🧩 The Challenge You are looking at a server with ten different mounts and need to...
Observability & Logging (Journald, EBPF Tracing) Stop getting blind-sided by system calls that disappear into the void Technical Briefing | 11/1/2026 You have likely been there. A process is acting...
Backup & Recovery (Rsync/Tar/Dd) Don’t let your backups die mid-stream because you forgot to check available space 🧩 The Challenge Everyone has had that moment where they kick off a...
Text Processing (Grep/Sed/Awk) Find config blocks by content, not just the first line 🧩 The Challenge You’re debugging an Nginx config, or maybe a systemd unit file, and you need...
DevOps Tooling On Linux (CI/CD Runners, Ansible) Stop Your CI/CD Runners From Quietly Trashing Your Host State Technical Briefing | 10/31/2026 You’ve got your CI/CD pipeline humming along. Builds are...
Container Basics On Linux (Namespaces/Cgroups) Give your weird service its own clean process tree 🧩 The Challenge Ever tried to test a startup script or a small daemon that *insists*...
Shell Scripting / Bash Tricks Don’t leave a mess when your script bombs out 🧩 The Challenge Ever had a shell script create a bunch of temporary directories or files,...
Virtualization (KVM/QEMU/Libvirt) Stop your KVM guests from thrashing the host with shared write locks Technical Briefing | 10/31/2026 You probably think your storage performance is a hardware problem. But I...