EXPLORE — THE WHOLE YGG SYSTEM
Explore
A chronological stream of everything — guides, troubleshooting, notes, analyses, projects and curated external sources.
explainer
How a given system, technology or principle works.
explainer How DNS delegation works and why it matters DNS is a delegated tree: every zone can hand responsibility one level down. Understand that and you understand why changes propagate slowly and where to look for faults. explainer SELinux from the kernel to the policy: labels, modules and finding bugs How SELinux hangs off the LSM hooks, what the context on every file means, how a module is built from .te and .if, and how a policy bug is actually found. explainer DISA STIG: what it is and how severity is read What DISA STIGs are, how the CAT I/II/III severity categories are read, and why rules are not applied blindly across the board. explainer AppArmor: an introduction to MAC for Linux applications What AppArmor is, how mandatory access control through profiles works, and how profiles are created and controlled. explainer AIX for a Linux admin: where Linux habits stop working The differences a Linux administrator meets when moving to AIX on IBM Power – tooling, LVM, LPARs, enterprise storage and backups, compared with SLES and RHEL. explainer Clickable and participatory budgets in practice A short explanation of clickable and participatory budgets and how they work in practice, including acquisition costs (as of 2018). explainer Open data – why is it worth having? What open data is, what it can look like in a town and why it makes sense – with examples of good practice from 2018. explainer Why and how enterprise distribution maintenance packages get tested Why a fix package for an enterprise Linux distribution goes through testing before release – regression testing, multiple architectures and virtualization. explainer Kernel isolation: PV, HVM and OS-level virtualization in Linux The difference between paravirtualization, full hardware virtualization and OS-level virtualization (containers) in Linux. explainer High availability and shared storage for a small XEN cluster How high availability and shared storage work for a small cluster of virtual machines on XEN.