Step-by-step, task-oriented guides — do this, in this order, to get this result.
A complete walkthrough building a batch-file boot menu that correctly manages memory-hungry TSRs — loading only what a chosen task actually needs, freeing conventional memory for everything else.
A complete walkthrough configuring the USBASPI/ASPIDISK driver chain to give FreeDOS a working drive letter for a USB flash drive — DOS-era drivers bridging a much newer standard.
Setting up FreeBSD's Basic Security Module audit framework to log security-relevant events with the right level of detail without drowning in noise.
A complete walkthrough creating a boot environment before a risky change, and rolling back to it instantly from the boot loader if something goes wrong.
A practical walkthrough of Capsicum's capability mode — how to check if a program supports it, and how sandboxed services actually differ from ordinary ones at the syscall level.
Configuring CARP for automatic IP failover between two FreeBSD hosts, and the parts of a real HA setup that CARP alone doesn't handle for you.
Getting DTrace enabled and running real diagnostic scripts on FreeBSD, from syscall counting to finding exactly which function is burning CPU, without recompiling anything.
A complete walkthrough creating, configuring, and managing jails using iocage — a much friendlier layer over raw jail.conf management.
Setting up multiple routing tables (fibs) on FreeBSD for policy routing across several uplinks, and what MPTCP actually offers versus simple multi-fib load distribution.
Building a real network-attached storage box on FreeBSD: pool layout decisions, dataset structure, and getting Samba to serve it with correct permissions to Windows and Mac clients.