Lessons from moving a DokuWiki installation between servers during a migration from AWS to Google Cloud, testing the promise of a simple file-based move.

Fixing Discourse backups against an external PostgreSQL server by updating the container's PostgreSQL tools to resolve a pg_dump version mismatch.

Adding FreeIPA LDAP authentication to a self-hosted Sentry Docker installation, including build dependencies and Django LDAP configuration.

Connecting Jenkins to FreeIPA's LDAP security realm, including a service account, user and group searches, and testing the authentication settings.

Configuring FreeIPA on AWS EC2, using Route 53 to handle the internal and public DNS records needed for cloud-hosted identity services.

Notes from installing an Ecobee3 smart thermostat in a home where the old thermostat used an undocumented K wire.

Migrating this blog from Drupal 6 to Drupal 8 with a separate test site and Drush, including hosting constraints and problems encountered along the way.

A case for viewing Clojure as a data-oriented programming language, combining familiar JSON-like collections with Lisp's way of defining and calling functions.

Why a longtime Vim user moved to Spacemacs for Clojure and ClojureScript development, seeking more complete debugging and refactoring tools.

Fixes for problems encountered when upgrading a MacBook Pro from Snow Leopard to Mountain Lion, including broken SSH public-key access.

Using Clojure to count maps between sets while working through early exercises in Lawvere's Conceptual Mathematics and learning category theory.

Building terminal Vim on OS X with Homebrew's Python support, including formula changes and a check of the Python interpreter Vim actually uses.

A personal introduction to learning category theory, motivated by a preference for unifying principles over memorizing mathematical techniques.

A cat-breed book in the vet's waiting room leads Tom's family to identify him as a Nebelung, comparing his appearance and personality with the breed.

The first twelve markers from a paternal ancestry DNA test, with an explanation of Y-STR results, haplotypes, and why SNP testing adds confirmation.

Questions about family origins and Han identity lead to a hypothesis about paternal ancestry and a decision to investigate with a Y-DNA test.

Displaying LaTeX mathematics in Drupal with MathJax, including inline and display examples, module configuration, and support for print-friendly pages.

Upgrading Drupal 5 to 6 with minimal downtime by preparing and testing a copy of the site before moving it into production.

Restoring Drupal search by reducing the number of items indexed per cron run and clearing the database variables left by a stuck cron job.

The final installment of solutions to 4clojure's first hundred problems, with reflections on learning core functions and the sequence library.