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BSD for Linux Users


Presentation for Ohio LinuxFest 2009.

Presentation for Ohio LinuxFest 2009.

Published in Technology
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  • 1. BSD For Linux Users Dru Lavigne Editor, Open Source Business Resource Ohio LinuxFest 2009
  • 2. This presentation will cover... What is this BSD you speak of? (frame of reference) How is it different? (will I like it?) Release engineering? (behind the scenes) Any features unique to BSD? (am I missing out on anything cool?) Books (some recommended reading)
  • 3. What is this BSD you speak of?
  • 4. aka What is this Linux you speak of?
  • 5. kernel?
  • 6. distro?
  • 7. Ubuntu?
  • 8. Back to BSD.... Since we only have 45 minutes..... We'll start with an overview of the BSD projects Then concentrate on some differences between (mostly) PC-BSD and (mostly) Ubuntu
  • 9. Back to BSD.... Differentiated by focus: NetBSD: clean design and portability (57 supported platforms) FreeBSD: production server stability and application support (20,715 apps) OpenBSD: security and dependable release cycle Dragonfly BSD: filesystem architecture PC-BSD: anyone can install and use BSD
  • 10. How is it different?
  • 11. Gnome vs.
  • 12. KDE
  • 13. device names
  • 14. startup (no runlevels)
  • 15. one config file philosophy
  • 16. kernel configuration
  • 17. consistent layout (man hier)
  • 18. BSD vs GNU switches
  • 19. working examples
  • 20. Release Engineering?
  • 21. Release Engineering Complete operating system, not kernel + distro: one source for security advisories, less likelihood of incompatible libraries Integration of features not limited by copyleft: e.g. drivers are built-in High “bus factor” Consistent separation between operating system and third party and between BSD and GPL'd code
  • 22. Release Engineering ● While each BSD project has a separate focus, the communities share ideas/code ● Mentorship process to earn commit bit ● FreeBSD 408 commit bits ● NetBSD 259 commit bits ● OpenBSD 122 commit bits ● plus thousands of contributors for software, docs, translations, bug fixes, etc ● Linux has 1 committer, 547 maintainers
  • 23. Release Engineering Principles used by the BSD projects reflect their academic roots: ● well defined process for earning a “commit bit” includes a period of working under a mentor ● code repository from Day 1 and can trace original code back to CSRG days ● no “leader”, instead well defined release engineering, security, and doc teams
  • 24. Release Engineering ● development occurs on CURRENT which is frozen in preparation for a RELEASE ● nightly builds (operating system and apps) help ensure that upgrades and installs don't result in library incompatibilities (safe for production) ● documentation considered as important as code
  • 25. Features unique to BSD?
  • 26. Features Unique to BSD ● system securelevels ● FreeBSD jails ● NetBSD build.sh for crosscompiling ● pkgsrc for cross-platform pkg mgmt ● PC-BSD PBIs for one-click installing ● VuXML or audit-packages ● NetBSD veriexec file integrity subsystem ● binary emulation (linux, solaris, sco, etc.) ● FreeBSD netgraph networking framework
  • 27. Features Unique to BSD ● ZFS and dtrace support (FreeBSD) ● CARP for failover redundancy ● FreeBSD superpages for speed ● BSM audit framework (Solaris compatible) ● freebsdupdate (working snapshots) ● ALTQ for QoS ● Dragonfly HAMMER for high availability
  • 28. Books: BSD Hacks Best of FreeBSD Basics Definitive Guide to PC-BSD (early 2010) Absolute BSD Absolute FreeBSD Absolute OpenBSD
  • 29. Questions: dru@osbr.ca Stop by the BSD booth and say hi!