32 chapters · PDF + EPUB draft

FreeBSD for Linux Professionals

The Complete Guide to FreeBSD 15.1 for SRE and DevOps Practitioners.

Coming soon

The book uses Linux as the starting point for learning FreeBSD. A translation table maps familiar commands and system concepts, then the chapters explain the base system, ZFS, jails, bhyve, and pf on their own terms. Examples run in a reproducible Proxmox lab built with OpenTofu. Later chapters cover the boot process, daily operations, and source builds.

By Wolfgang Kerschbaumer

Status: all 32 chapters and 7 appendices are in draft for FreeBSD 15.1. Fact-checking, runtime verification, and final editing remain.

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First edition ships DRM-free as PDF and EPUB, with free updates.

01 Contents

Learn FreeBSD through the Linux concepts you already know.

The opening chapters translate Linux habits into FreeBSD concepts and build the lab. Later parts cover boot and services, storage, networking, jails, bhyve, and production operations. The final parts examine the kernel, userland, and ecosystem. Open a part to see its chapters.

Preface

What this book assumes, and how to read it

Part 1 Orientation 3 chapters

1 One System, Whole: The FreeBSD Model
2 The Translation Table: FreeBSD for Linux Eyes
3 The Lab: FreeBSD 15.1 on Proxmox with OpenTofu

Part 2 First Boot to First Service 6 chapters

4 Installing FreeBSD: From bsdinstall to Unattended
5 The Boot Chain: Firmware to /sbin/init
6 Init, rc, and Service Management
7 Software Management with pkg
8 Users, Authentication, and Login Classes
9 Batteries Included: The Base-System Daemons

Part 3 Storage and Data 4 chapters

10 GEOM and UFS: The Traditional Storage Stack
11 ZFS Fundamentals
12 ZFS in Operation
13 Backup and Disaster Recovery

Part 4 Networking 3 chapters

14 The Network Stack: Links, Routes, and TCP
15 Plugging In: DHCP, IPv6, and Name Resolution
16 Firewalls: pf, ipfw, and Traffic Shaping

Part 5 Compartments: Jails and Virtual Machines 3 chapters

17 Jails: The Model
18 Jails in Production
19 bhyve: Virtual Machines

Part 6 Production Operations 6 chapters

20 Staying Current: pkgbase, freebsd-update, and Security Advisories
21 Cross-OS Interop: SMB, NFS with Linux, and Foreign Disks
22 High Availability: CARP, pfsync, and HAST
23 Security Architecture and Hardening
24 Observability: DTrace, Tracing, and Crash Dumps
25 Performance Tuning

Part 7 Under the Hood 4 chapters

26 The Kernel: GENERIC, Modules, and sysctl
27 Building Your Own: Ports and poudriere
28 Building FreeBSD from Source
29 The Developer's FreeBSD: Toolchain and Contributing

Part 8 Ecosystem and Interop 3 chapters

30 The Linuxulator: Running Linux Binaries
31 FreeBSD on Your Hardware: WiFi, Graphics, and the Desktop
32 The Project: Governance, Releases, and the Adoption Playbook

Part 9 Appendices 7 appendices

A Linux-to-FreeBSD Command and Concept Reference
B Troubleshooting Playbook
C Configuration File Reference
D Removed, Renamed, and Deprecated in 15.x
E Glossary
F Sources and Further Reading
G Subject Index

02 Who it's for

For engineers who know Linux.

This book is for SRE and DevOps practitioners who run production Linux systems. It assumes fluency with the shell, services, storage, and networking. Readers do not need FreeBSD experience.

Written for

Linux engineers who want the translation table first: every familiar habit mapped to its FreeBSD counterpart.
Teams evaluating ZFS, jails, bhyve, and pf for production workloads.
Operators drawn to one coherent base system, with kernel, userland, and documentation released together.

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