7 posts
linux A routine apt upgrade broke GNOME thumbnails silently for 8 days on Ubuntu 24.04. Three root causes: stale gdk-pixbuf loader in memory, corrupt Tracker3 database, and bubblewrap (bwrap) sandboxing blocked by AppArmor. Includes the exact fix.
linux A practical guide to reading and using the top command for Linux performance monitoring.
vagrant How to use Vagrant with the QEMU/KVM provider instead of VirtualBox for faster local VMs on Linux.
linux How to use aureport to summarise and query the Linux audit daemon logs for security analysis.
linux A clear breakdown of the most important DNS record types and when to use each one.
linux A practical introduction to LVM — physical volumes, volume groups, logical volumes, and how to manage them.
linux The most useful yum commands for package management on RHEL/CentOS systems.