BSD for Linux Users


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Presentation for Ohio LinuxFest 2009.

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BSD for Linux Users

  1. 1. BSD For Linux Users Dru Lavigne Editor, Open Source Business Resource Ohio LinuxFest 2009
  2. 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. 3. What is this BSD you speak of?
  4. 4. aka What is this Linux you speak of?
  5. 5. kernel?
  6. 6. distro?
  7. 7. Ubuntu?
  8. 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. 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. 10. How is it different?
  11. 11. Gnome vs.
  12. 12. KDE
  13. 13. device names
  14. 14. startup (no runlevels)
  15. 15. one config file philosophy
  16. 16. kernel configuration
  17. 17. consistent layout (man hier)
  18. 18. BSD vs GNU switches
  19. 19. working examples
  20. 20. Release Engineering?
  21. 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. 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. 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. 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. 25. Features unique to BSD?
  26. 26. Features Unique to BSD ● system securelevels ● FreeBSD jails ● NetBSD 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. 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. 28. Books: BSD Hacks Best of FreeBSD Basics Definitive Guide to PC-BSD (early 2010) Absolute BSD Absolute FreeBSD Absolute OpenBSD
  29. 29. Questions: Stop by the BSD booth and say hi!