BSD for Linux Users

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Presentation for 2009 Ontario LinuxFest.

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BSD for Linux Users

  1. 1. BSD For Linux Users Dru Lavigne Chair, BSD Certification Group Ontario 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 the BSD and Linux way of doing things
  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 on Ubuntu vs.
  12. 12. KDE on PC-BSD
  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 and features 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 ● 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. securelevels
  27. 27. FreeBSD jails
  28. 28. NetBSD build.sh
  29. 29. pkgsrc
  30. 30. PC-BSD PBIs
  31. 31. VuXML and portaudit or pkg_admin audit for pkgsrc systems
  32. 32. NetBSD veriexec
  33. 33. binary emulation
  34. 34. FreeBSD netgraph
  35. 35. ZFS support
  36. 36. FreeBSD dtrace suport
  37. 37. CARP
  38. 38. FreeBSD superpages
  39. 39. OpenBSM
  40. 40. FreeBSD snapshots
  41. 41. ALTQ
  42. 42. DragonFly HAMMER
  43. 43. Books: BSD Hacks Best of FreeBSD Basics Definitive Guide to PC-BSD (early 2010) Absolute BSD Absolute FreeBSD Absolute OpenBSD
  44. 44. Questions: dru@osbr.ca Stop by the BSD booth and say hi!
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