OpenBSD version history

Last updated

Version history

The following table summarizes the version history of the OpenBSD operating system.

Contents

Legend:Old version, not maintainedOlder version, still maintainedCurrent stable versionLatest preview versionFuture release
VersionRelease dateSupported untilSignificant changes
Old version, no longer maintained: 1.118 October 1995
  • OpenBSD CVS repository created by Theo de Raadt. [1]
  • While the version number used at this stage was 1.1, [lower-alpha 1] OpenBSD 1.1 was not an official OpenBSD release in the sense which this term subsequently came to be used.
Old version, no longer maintained: 1.21 July 1996
  • Creation of the intro(9) man page, for documenting kernel internals.
  • Integration of the update(8) command into the kernel.
  • As before, while this version number was used in the early development of the OS, OpenBSD 1.2 was not an official release in the subsequently applicable sense.
Old version, no longer maintained: 2.01 October 1996
Old version, no longer maintained: 2.11 June 1997Replacement of the older sh with pdksh. [4]
Old version, no longer maintained: 2.21 December 1997Addition of the afterboot(8) man page. [5]
Old version, no longer maintained: 2.319 May 1998Introduced the haloed daemon, or aureola beastie, in head-only form created by Erick Green. [6]
Old version, no longer maintained: 2.41 December 1998Featured the complete haloed daemon, with trident and a finished body. [7]
Old version, no longer maintained: 2.519 May 1999Introduced the Cop daemon image done by Ty Semaka. [8]
Old version, no longer maintained: 2.61 December 1999Based on the original SSH suite and developed further by the OpenBSD team, 2.6 saw the first release of OpenSSH, which is now available standard on most Unix-like operating systems and is the most widely used SSH suite. [9]
Old version, no longer maintained: 2.715 June 2000Support for SSH2 added to OpenSSH. [10]
Old version, no longer maintained: 2.81 December 2000isakmpd(8) [11]
Old version, no longer maintained: 2.91 June 2001

[12]

Old version, no longer maintained: 3.01 December 2001

E-Railed (OpenBSD Mix), [13] a techno track performed by the release mascot Puff Daddy, the famed rapper and political icon.

Old version, no longer maintained: 3.119 May 2002Systemagic, [14] where Puffy, the Kitten Slayer, battles evil script kitties. Inspired by the works of Rammstein and a parody of Buffy the Vampire Slayer.
  • First official remote security hole - OpenSSH integer overflow [15]
Old version, no longer maintained: 3.21 November 2002Goldflipper, [16] a tale in which James Pond, agent 077, super spy and suave lady's man, deals with the dangers of a hostile internet. Styled after the orchestral introductory ballads of James Bond films.
Old version, no longer maintained: 3.31 May 2003

Puff the Barbarian, [17] born in a tiny bowl; Puff was a slave, now he hacks through the C, searching for the Hammer. It is an 80s rock-style song and parody of Conan the Barbarian dealing with open documentation.

  • In 2003, code from ALTQ, which had a license disallowing the sale of derivatives, was relicensed, integrated into pf and made available in OpenBSD 3.3.
  • First release adding the W^X feature, a fine-grained memory permissions layout, ensuring that memory which can be written to by application programs can not be executable at the same time and vice versa.
Old version, no longer maintained: 3.41 November 2003

The Legend of Puffy Hood where Sir Puffy of Ramsay, [18] a freedom fighter who, with Little Bob of Beckley, took from the rich and gave to all. Tells of the POSSE project's cancellation. An unusual blend of both hip-hop and medieval-style music, a parody of the tale of Robin Hood intended to express OpenBSD's attitude to free speech.

Old version, no longer maintained: 3.51 May 2004

CARP License and Redundancy must be free, [22] where a fish seeking to license his free redundancy protocol, CARP, finds trouble with the red tape. A parody of the Fish License skit and Eric the Half-a-Bee Song by Monty Python, with an anti-software patents message.

  • CARP, an open alternative to the HSRP and VRRP redundancy systems available from commercial vendors. [23] [24]
  • GPL licensed parts of the GNU tool-set, bc, [25] dc, [26] nm [27] and size, [28] were all replaced with BSD licensed equivalents.
  • AMD64 platform becomes stable enough for release and is included for the first time as part of a release.
Old version, no longer maintained: 3.61 November 2004

Pond-erosa Puff (live) was the tale of Pond-erosa Puff, [29] a no-guff freedom fighter from the wild west, set to hang a lickin' on no-good bureaucratic nerds who encumber software with needless words and restrictions. The song was styled after the works of Johnny Cash, a parody of the Spaghetti Western and Clint Eastwood and inspired by liberal license enforcement.

  • OpenNTPD, a compatible alternative to the reference NTP daemon, was developed within the OpenBSD project. The goal of OpenNTPD was not solely a compatible license. It also aims to be a simple, secure NTP implementation providing acceptable accuracy for most cases, without requiring detailed configuration. [30] [31]
  • Because of its questionable security record and doubts of developers for better future development, OpenBSD removed Ethereal from its ports tree prior to its 3.6 release.
  • Added support for I²C master/slave devices [31]
Old version, no longer maintained: 3.719 May 2005 The Wizard of OS , [32] where Puffathy, a little Alberta girl, must work with Taiwan to save the day by getting unencumbered wireless. This release was styled after the works of Pink Floyd and a parody of The Wizard of Oz; this dealt with wireless hacking. [33]
Old version, no longer maintained: 3.81 November 20051 November 2006Hackers of the Lost RAID, [34] which detailed the exploits of Puffiana Jones, famed hackologist and adventurer, seeking out the Lost RAID, Styled after the radio serials of the 1930s and 40s, this was a parody of Indiana Jones and was linked to the new RAID tools featured as part of this release. This is the first version released without the telnet daemon which was completely removed from the source tree by Theo de Raadt in May 2005. [35]
Old version, no longer maintained: 3.91 May 20061 May 2007

Attack of the Binary BLOB, [37] which chronicles the developer's fight against binary blobs and vendor lock-in, [38] a parody of the 1958 film The Blob and the pop-rock music of the era.

  • Enhanced OpenBGPD feature-set.
  • Improved hardware sensors support, including a new IPMI subsystem and a new I²C scan subsystem; number of drivers using the sensors framework increased to a total of 33 drivers (compared to 9 in the prior 3.8 release 6 months ago). [21] [38]
Old version, no longer maintained: 4.01 November 20061 November 2007Humppa Negala, [39] a Hava Nagilah parody with a portion of Entrance of the Gladiators and Humppa music fused together, with no story behind it, simply a homage to one of the OpenBSD developers' favorite genres of music. [40]
  • Second official remote security hole - buffer overflow by malformed ICMPv6 packets [41]
Old version, no longer maintained: 4.11 May 20071 May 2008Puffy Baba and the 40 Vendors, [42] a parody of the Arabic fable Ali Baba and the Forty Thieves, part of the book of One Thousand and One Nights, in which Linux developers are mocked over their allowance of non-disclosure agreements when developing software while at the same time implying hardware vendors are criminals for not releasing documentation required to make reliable device drivers. [43]
  • Redesigned sysctl hw.sensors into a two-level sensor API; [44] [45] a total of 46 device drivers exporting sensors through the framework with this release. [21]
Old version, no longer maintained: 4.21 November 20071 November 2008100001 1010101, [46] the Linux kernel developers gets a knock for violating the ISC-style license of OpenBSD's open hardware abstraction layer for Atheros wireless cards.
  • Usability of sensorsd improved, allowing zero-configuration monitoring of smart sensors from the hw.sensors framework (e.g., IPMI or bio(4)-based), and easier configuration for monitoring of non-smart sensors. [47]
Old version, no longer maintained: 4.31 May 20081 May 2009Home to Hypocrisy [48] [49]
Old version, no longer maintained: 4.41 November 200818 October 2009

Trial of the BSD Knights, [50] summarizes the history of BSD including the USL v. BSDi lawsuit. The song was styled after the works of Star Wars.

Old version, no longer maintained: 4.51 May 200919 May 2010Games. It was styled after the works of Tron. [53]
Old version, no longer maintained: 4.618 October 20091 November 2010Planet of the Users. [56] In the style of Planet of the Apes , Puffy travels in time to find a dumbed-down dystopia, where "one very rich man runs the earth with one multinational". Open-source software has since been replaced by one-button computers, one-channel televisions, and closed-source software which, after you purchase it, becomes obsolete before you have a chance to use it. People subsist on soylent green. The theme song is performed in the reggae rock style of The Police.
  • smtpd(8), privilege-separated SMTP server
  • tmux(1) terminal multiplexer
  • The hw.sensors framework is used by 75 device drivers. [55]
Old version, no longer maintained: 4.719 May 20101 May 2011I'm Still Here [57]
Old version, no longer maintained: 4.81 November 20101 November 2011El Puffiachi. [58] [59]
  • iked(8) IKEv2 daemon
  • ldapd(8) LDAP daemon
Old version, no longer maintained: 4.91 May 20111 May 2012The Answer. [60]
  • rc.d(8) daemon control
Old version, no longer maintained: 5.01 November 20111 November 2012What Me Worry?. [61]
Old version, no longer maintained: 5.11 May 20121 May 2014Bug Busters. The song was styled after the works of Ghostbusters. [62]
Old version, no longer maintained: 5.21 November 20121 November 2013Aquarela do Linux. [63]
Old version, no longer maintained: 5.31 May 20131 May 2014Blade Swimmer. The song was styled after the works of Roy Lee, a parody of Blade Runner. [64]
Old version, no longer maintained: 5.41 November 20131 November 2014Our favorite hacks, a parody of My Favorite Things. [65]
Old version, no longer maintained: 5.51 May 20141 May 2015Wrap in Time. [66]
  • signify(1) cryptographic signatures of release and packages
  • 64bit time_t on all platforms (Y2K38 ready)
Old version, no longer maintained: 5.61 November 201418 October 2015Ride of the Valkyries. [67]
Old version, no longer maintained: 5.71 May 201529 March 2016Source Fish. [68]
  • rcctl(8) utility to control daemons
  • nginx(8) removed from base
  • procfs has been removed
Old version, no longer maintained: 5.818 October 20151 September 201620 years ago today, Fanza, So much better, A Year in the Life. [69]

(20th anniversary release [70] )

  • doas(1) replacement of sudo
Old version, no longer maintained: 5.929 March 201611 April 2017Doctor W^X, Systemagic (Anniversary Edition). [71]
  • W^X enforced in i386 kernel
  • pledge(2) process restriction
Old version, no longer maintained: 6.01 September 20169 October 2017Another Smash of the Stack, Black Hat, Money, Comfortably Dumb (the misc song), Mother, Goodbye and Wish you were Secure, Release songs parodies of Pink Floyd's The Wall, Comfortably Numb and Wish You Were Here. [72]
  • vmm(4) virtualization (disabled by default)
  • Removed vax [73] and 32-bit SPARC [74] support
Old version, no longer maintained: 6.111 April 201715 April 2018Winter of 95, a parody of Summer of '69. [75]
  • syspatch(8) utility for binary base system updates
  • new arm64 platform
Old version, no longer maintained: 6.29 October 201718 October 2018A three-line diff [76]
  • inteldrm(4) Skylake/Kaby Lake/Cherryview devices
  • clang(1) base system compiler on i386 and amd64 platforms
Old version, no longer maintained: 6.32 April 20183 May 2019
  • SMP is supported on arm64 platforms.
  • Several parts of the network stack now run without KERNEL_LOCK().
  • Multiple security improvements have been made, including Meltdown/Spectre (variant 2) mitigations. Intel CPU microcode is loaded on boot on amd64.
  • pledge() has been modified to support "execpromises" (as the second argument).
Old version, no longer maintained: 6.418 October 201817 October 2019
  • unveil(2) filesystem visibility restriction. [77]
Old version, no longer maintained: 6.524 April 201919 May 2020
Old version, no longer maintained: 6.617 October 201918 October 2020
  • sysupgrade(8) automates upgrades to new releases or snapshots. [78]
  • amdgpu(4) AMD RADEON GPU video driver.
Old version, no longer maintained: 6.719 May 20201 May 2021
  • Made ffs2 the default filesystem type on installs except for landisk, luna88k and sgi. [79]
Older version, yet still maintained: 6.818 October 2020November 2021 [lower-alpha 2]
  • 25th anniversary release.
  • New powerpc64 platform. [81]
Current stable version:6.91 May 2021May 2022 [lower-alpha 2]
VersionRelease dateSupported untilSignificant changes

Notes

  1. Compare release history of NetBSD, which OpenBSD branched from
  2. 1 2 OpenBSD is released roughly every 6 months targeting May and November and only the latest two releases receive security and reliability fixes for the base system. [80]

Related Research Articles

Matthew Dillon American software engineer

Matthew Dillon is an American software engineer known for Amiga software, contributions to FreeBSD and for starting and leading the DragonFly BSD project since 2003.

pax (command)

pax is an archiving utility available for various operating systems and defined since 1995. Rather than sort out the incompatible options that have crept up between tar and cpio, along with their implementations across various versions of Unix, the IEEE designed a new archive utility that could support various archive formats with useful options from both archivers. The pax command is available on Unix and Unix-like operating systems and on IBM i, Microsoft Windows NT, and Windows 2000.

Keith Bostic American software engineer

Keith Bostic is an American software engineer and one of the key people in the history of Berkeley Software Distribution UNIX and open-source software.

Russ Nelson American computer programmer

Russell "Russ" Nelson is an American computer programmer. He was a founding board member of the Open Source Initiative and briefly served as its president in 2005.

Ralink Wi-Fi chipset manufacturer

Ralink Technology, Corp. was a Wi-Fi chipset manufacturer mainly known for their IEEE 802.11 chipsets. Ralink was founded in 2001 in Cupertino, California, then moved its headquarters to Hsinchu, Taiwan.

sysctl is a software utility of some Unix-like operating systems that reads and modifies the attributes of the system kernel such as its version number, maximum limits, and security settings. It is available both as a system call for compiled programs, and an administrator command for interactive use and scripting. Linux additionally exposes sysctl as a virtual file system.

In computing, ioctl is a system call for device-specific input/output operations and other operations which cannot be expressed by regular system calls. It takes a parameter specifying a request code; the effect of a call depends completely on the request code. Request codes are often device-specific. For instance, a CD-ROM device driver which can instruct a physical device to eject a disc would provide an ioctl request code to do so. Device-independent request codes are sometimes used to give userspace access to kernel functions which are only used by core system software or still under development.

pfsync is a computer protocol used to synchronise firewall states between machines running Packet Filter (PF) for high availability. It is used along with CARP to make sure a backup firewall has the same information as the main firewall. When the main machine in the firewall cluster dies, the backup machine is able to accept current connections without loss.

A system monitor is a hardware or software component used to monitor system resources and performance in a computer system.

lm_sensors Software tool

lm_sensors is a free open-source software-tool for Linux that provides tools and drivers for monitoring temperatures, voltage, humidity, and fans. It can also detect chassis intrusions.

Xenocara is the OpenBSD build infrastructure for the project's customised X.Org Server that utilises a dedicated _x11 user by default to drop privileges and perform privilege separation in accordance to OpenBSD's "least privilege" policy.

OpenBSD Security-focused Unix-like operating system

OpenBSD is a security-focused, free and open-source, Unix-like operating system based on the Berkeley Software Distribution (BSD). Theo de Raadt created OpenBSD in 1995 by forking NetBSD. According to the website, the OpenBSD project emphasizes "portability, standardization, correctness, proactive security and integrated cryptography."

Write Ahead Physical Block Logging (WAPBL) provides meta data journaling for file systems in conjunction with Fast File System (FFS) to accomplish rapid filesystem consistency after an unclean shutdown of the filesystem and better general use performance over regular FFS. With the journal, fsck is no longer required at system boot; instead, the system can replay the journal in order to correct any inconsistencies in the filesystem if the system has been shutdown in an unclean fashion.

OpenSSH Set of computer programs providing encrypted communication sessions

OpenSSH is a suite of secure networking utilities based on the Secure Shell (SSH) protocol, which provides a secure channel over an unsecured network in a client–server architecture.

NetBSD Open-source Unix-like operating system

NetBSD is a free and open-source Unix-like operating system based on the Berkeley Software Distribution (BSD). It was the first open-source BSD descendant officially released after 386BSD was forked. It continues to be actively developed and is available for many platforms, including servers, desktops, handheld devices, and embedded systems.

sndio is the software layer of the OpenBSD operating system that manages sound cards and MIDI ports. It provides an optional sound server and a documented application programming interface to access either the server or the audio and MIDI hardware in a uniform way. sndio is designed to work for desktop applications, but pays special attention to synchronization mechanisms and reliability required by music applications.

The sysctl hw.sensors framework is a kernel-level hardware sensors framework originating from OpenBSD, which uses the sysctl kernel interface as the transport layer between the kernel and the userland. As of 2019, the framework is used by over a hundred device drivers in OpenBSD to export various environmental sensors, with temperature sensors being the most common type. Consumption and monitoring of sensors is done in the userland with the help of sysctl, systat, sensorsd, ntpd, snmpd, ports/sysutils/symon and GKrellM.

The envsys framework is a kernel-level hardware monitoring sensors framework in NetBSD. As of 4 March 2019, the framework is used by close to 85 device drivers to export various environmental monitoring sensors, as evidenced by references of the sysmon_envsys_register symbol within the sys path of NetBSD; with temperature sensors, ENVSYS_STEMP, being the most likely type to be exported by any given driver. Sensors are registered with the kernel through sysmon_envsys(9) API. Consumption and monitoring of sensors from the userland is performed with the help of envstat utility through proplib(3) through ioctl(2) against the /dev/sysmon pseudo-device file, the powerd power management daemon that responds to kernel events by running scripts from /etc/powerd/scripts/, as well as third-party tools like symon and GKrellM from pkgsrc.

The bio(4) pseudo-device driver and the bioctl(8) utility implement a generic RAID volume management interface in OpenBSD and NetBSD. The idea behind this software is similar to ifconfig, where a single utility from the operating system can be used to control any RAID controller using a generic interface, instead of having to rely on many proprietary and custom RAID management utilities specific for each given hardware RAID manufacturer. Features include monitoring of the health status of the arrays, controlling identification through blinking the LEDs and managing of sound alarms, and specifying hot spare disks. Additionally, the softraid configuration in OpenBSD is delegated to bioctl as well; whereas the initial creation of volumes and configuration of hardware RAID is left to card BIOS as non-essential after the operating system has already been booted. Interfacing between the kernel and userland is performed through the ioctl system call through the /dev/bio pseudo-device.

References

  1. "Undeadly" . Retrieved 9 October 2018.
  2. "Changes". Archived from the original on 9 October 2018.
  3. "OpenBSD 2.0" . Retrieved 9 October 2018.
  4. "Release Notes" . Retrieved 9 October 2018.
  5. "Release Notes" . Retrieved 9 October 2018.
  6. "Release Notes" . Retrieved 9 October 2018.
  7. "Release Notes" . Retrieved 9 October 2018.
  8. "Release Notes" . Retrieved 9 October 2018.
  9. "Release Notes" . Retrieved 9 October 2018.
  10. "Release Notes" . Retrieved 9 October 2018.
  11. "Release Notes" . Retrieved 9 October 2018.
  12. "Release Notes" . Retrieved 9 October 2018.
  13. "Release Notes" . Retrieved 9 October 2018.
  14. "Release Notes" . Retrieved 9 October 2018.
  15. "Errata" . Retrieved 9 October 2018.
  16. "Release Notes" . Retrieved 9 October 2018.
  17. "Release Notes" . Retrieved 9 October 2018.
  18. "Release Notes" . Retrieved 9 October 2018.
  19. "p0f" . Retrieved 9 October 2018.
  20. 1 2 3 "OpenBSD Innovations". The OpenBSD project. Retrieved 12 September 2016.
  21. 1 2 3 Constantine A. Murenin; Raouf Boutaba (17 March 2009). "6. Evolution of the framework". OpenBSD Hardware Sensors Framework (PDF). AsiaBSDCon 2009 Proceedings, 12–15 March 2009. Tokyo University of Science, Tokyo, Japan (published 14 March 2009). Archived (PDF) from the original on 21 February 2009. Retrieved 4 March 2019.
  22. "Release Notes" . Retrieved 9 October 2018.
  23. Federico Biancuzzi (15 April 2004). "OpenBSD PF Developer Interview". ONLamp. O'Reilly Media . Retrieved 20 March 2019.
  24. Federico Biancuzzi (6 May 2004). "OpenBSD PF Developer Interview, Part 2". ONLamp. O'Reilly Media . Retrieved 20 March 2019.
  25. "bc(1)" . Retrieved 9 October 2018.
  26. "dc(1)" . Retrieved 9 October 2018.
  27. "nm(1)" . Retrieved 9 October 2018.
  28. "size(1)" . Retrieved 9 October 2018.
  29. "Release Notes" . Retrieved 9 October 2018.
  30. "Release Notes" . Retrieved 9 October 2018.
  31. 1 2 Federico Biancuzzi (28 October 2004). "OpenBSD 3.6 Live". ONLamp. O'Reilly Media . Retrieved 20 March 2019.
  32. "Release Notes" . Retrieved 9 October 2018.
  33. Federico Biancuzzi (19 May 2005). "OpenBSD 3.7: The Wizard of OS". ONLamp. O'Reilly Media . Retrieved 20 March 2019.
  34. "Release Notes" . Retrieved 9 October 2018.
  35. de Raadt, Theo. "CVS: cvs.openbsd.org: src". OpenBSD-CVS mailing list. Removed files: libexec/telnetd
  36. Federico Biancuzzi (20 October 2005). "OpenBSD 3.8: Hackers of the Lost RAID". ONLamp. O'Reilly Media . Retrieved 20 March 2019.
  37. "Release Notes" . Retrieved 9 October 2018.
  38. 1 2 Federico Biancuzzi (27 April 2006). "OpenBSD 3.9: Blob-Busters Interviewed". ONLamp. O'Reilly Media . Retrieved 19 March 2019.
  39. "Release Notes" . Retrieved 9 October 2018.
  40. Federico Biancuzzi (26 October 2006). "OpenBSD 4.0: Pufferix's Adventures". ONLamp. O'Reilly Media . Retrieved 19 March 2019.
  41. "Errata" . Retrieved 9 October 2018.
  42. "Release Notes" . Retrieved 9 October 2018.
  43. Federico Biancuzzi (3 May 2007). "OpenBSD 4.1: Puffy Strikes Again". ONLamp. O'Reilly Media . Retrieved 19 March 2019.
  44. Constantine A. Murenin (30 December 2006). Marco Peereboom (ed.). "New two-level sensor API". OpenBSD Journal . Retrieved 4 March 2019.
  45. Constantine A. Murenin (17 April 2007). "4.3. What we have proposed and implemented". Generalised Interfacing with Microprocessor System Hardware Monitors. Proceedings of 2007 IEEE International Conference on Networking, Sensing and Control, 15–17 April 2007. London, United Kingdom: IEEE. pp. 901–906. doi:10.1109/ICNSC.2007.372901. ISBN   1-4244-1076-2. IEEE ICNSC 2007, pp. 901—906.
  46. "Release Notes" . Retrieved 9 October 2018.
  47. Federico Biancuzzi (1 November 2007). "Puffy's Marathon: What's New in OpenBSD 4.2". ONLamp. O'Reilly Media . Retrieved 3 March 2019. Lay summary.
  48. "Release Notes" . Retrieved 9 October 2018.
  49. Federico Biancuzzi (29 April 2008). "Puffy and the Cryptonauts: What's New in OpenBSD 4.3". ONLamp. O'Reilly Media . Retrieved 20 March 2019.
  50. "Release Notes" . Retrieved 9 October 2018.
  51. Kurt Miller (2008). "OpenBSD's Position Independent Executable (PIE) Implementation". Archived from the original on 12 June 2011. Retrieved 22 July 2011.
  52. 1 2 Federico Biancuzzi (3 November 2008). "Source Wars - Return of the Puffy: What's New in OpenBSD 4.4". O'Reilly Media . Retrieved 3 March 2019.
  53. "Release Notes" . Retrieved 9 October 2018.
  54. Federico Biancuzzi (15 June 2009). "PuffyTron recommends OpenBSD 4.5". O'Reilly Media . Retrieved 19 March 2019.
  55. 1 2 Constantine A. Murenin (21 May 2010). "6.2. Evolution of drivers; Chart VII. Number of drivers using the sensors framework from OpenBSD 3.4 to 4.6.". OpenBSD Hardware Sensors — Environmental Monitoring and Fan Control (MMath thesis). University of Waterloo: UWSpace. hdl:10012/5234. Document ID: ab71498b6b1a60ff817b29d56997a418.
  56. "Release Notes" . Retrieved 9 October 2018.
  57. "Release Notes" . Retrieved 9 October 2018.
  58. "Release Notes" . Retrieved 9 October 2018.
  59. "MARC" . Retrieved 9 October 2018.
  60. "Release Notes" . Retrieved 9 October 2018.
  61. "Release Notes" . Retrieved 9 October 2018.
  62. "Release Notes" . Retrieved 9 October 2018.
  63. "Release Notes" . Retrieved 9 October 2018.
  64. "Release Notes" . Retrieved 9 October 2018.
  65. "Release Notes" . Retrieved 9 October 2018.
  66. "Release Notes" . Retrieved 9 October 2018.
  67. "Release Notes" . Retrieved 9 October 2018.
  68. "Release Notes" . Retrieved 9 October 2018.
  69. "Release Notes" . Retrieved 9 October 2018.
  70. "MARC" . Retrieved 9 October 2018.
  71. "Release Notes" . Retrieved 9 October 2018.
  72. OpenBSD 6.0. OpenBSD. ISBN   978-0-9881561-8-0 . Retrieved 24 July 2016.
  73. "OpenBSD vax". OpenBSD. Retrieved 2 September 2016.
  74. "OpenBSD sparc". OpenBSD. Retrieved 2 September 2016.
  75. "OpenBSD 6.1". OpenBSD. Retrieved 11 April 2017.
  76. "OpenBSD 6.2". OpenBSD.
  77. "unveil(2)". OpenBSD. Retrieved 19 October 2018.
  78. "OpenBSD 6.6". OpenBSD. Retrieved 17 January 2020.
  79. "OpenBSD 6.7". OpenBSD. Retrieved 21 May 2020.
  80. "OpenBSD FAQ". OpenBSD. Retrieved 5 May 2021.
  81. "OpenBSD 6.8". OpenBSD. Retrieved 18 October 2020.
  82. "OpenBSD 6.9". OpenBSD. Retrieved 2 May 2021.