| Nik Clayton | |
| nik@FreeBSD.org nik@crf-consulting.co.uk nik@slashdot.org |
| Open Source (free) Unix operating system | |
| Runs on IA32, IA64, AMD-Hammer, Alpha, Sparc, PPC | |
| Supports wide range of peripherals | |
| 1000’s of software packages available | |
| Many commercial users | |
| Thousands of developers around the world contributing to it | |
| Core component of many embedded systems |
| It’s a “daemon”, not a demon | ||
| Greek “daemons” were neutral spirits that fetched and carried | ||
| Geek “daemons” are programs that continuously run, doing useful things | ||
| Serving web pages | ||
| Shuttling e-mail back and forth | ||
| Handling print requests | ||
| httpd, named, lpd, et al | ||
| To all intents and purposes, FreeBSD is Unix™ | |
| Multitasking | |
| Multiuser | |
| Emphasis on command line tools | |
| Network ready and remotely accessible | |
| Terse, cryptic, but very, very, powerful :-) | |
| “Unix is a nice place to live, but you wouldn’t want to visit” | |
| “Unix does not stop you doing stupid things, because that would also stop you doing clever things” |
| 1969 Work begins on Unix at AT&T Bell Labs | |
| 1971 Unix, First Edition | |
| 1972 “The number of Unix installations has grown to 10, with more expected” , Dennis Ritchie | |
| 1973 Unix re-written in C | |
| 1975 Unix, Sixth Edition. First version widely available outside AT&T | |
| 1976 1BSD, based on Sixth
Edition. Bill Joy coins the
term “Berkeley Software Distribution” |
|
| 1979 3BSD. Unix gets Virtual Memory | |
| 1984 4.2BSD. First deployment of TCP/IP in the world | |
| 1991 4.3BSD NET/2 |
| 1992 386BSD 0.1, based on 4.3/NET2 | |
| 1993 FreeBSD 1.0 | |
| 1995 FreeBSD 2.0 | |
| 1998 FreeBSD 3.0 | |
| 2000 FreeBSD 4.0 | |
| 2001 FreeBSD 4.4 | |
| 2002 FreeBSD 5.0 |
| Powering websites | ||
| Yahoo | ||
| VA Linux / OSDN / Slashdot | ||
| Netcraft | ||
| “Grunt work” | ||
| Disney | ||
| Manex VFX | ||
| NASA | ||
| ISPs | ||
| UUNet, Pair, Demon, EasyNet, … | ||
| Embedded Systems | ||
| IBM | ||
| Intel | ||
| Nokia | ||
| Checkpoint | ||
| Juniper Networks | ||
| Coyote | ||
| Other operating systems | ||
| Mac OS X | ||
| FreeBSD consists of all the components needed for a complete operating system | ||
| kernel | ||
| compiler | ||
| include files | ||
| libraries | ||
| user-land utilities | ||
| Kernel and user-land are kept synchronised, and can be built, from source, as a unit | ||
| Networking | ||
| IPv4, IPv6, IPSec, SSL | ||
| Firewall | ||
| NAT | ||
| Filtering, Proxying, and Caching | ||
| VPN | ||
| Infrastructure | ||
| DNS | ||
| DHCP (client and server) | ||
| Telephony | ||
| PPP (dial-in, dial-out) | ||
| Fax (send/receive) | ||
| Printing | ||
| Postscript | ||
| Network printing | ||
| File sharing | ||
| NFS | ||
| SMB/CIFS | ||
| Appletalk | ||
| SMTP, POP3, IMAP, Webmail | ||
| Web | ||
| HTTP | ||
| This space for rent |
| 5,800+ applications available as binary packages | |
| Linux has similar number of applications available in a number of different binary formats (RPM, Deb, and others, depending on the distribution). | |
| Packages are built from the “ports tree” | |
| Ports tree is a mechanism that automates the process of downloading, checksumming, unpacking, patching, configuring, building, and installing new software |
| Two layers of FreeBSD organisation | |
| The committers, and everyone else | |
| Committers have write access to the source tree | |
| Everyone else submits patches or bug reports using FreeBSD's problem reporting system, and waits for a committer to commit the change | |
| Individuals who submit many patches (that work) are invited to become committers | |
| 9 committers form the elected "core team", for dispute resolution |
| FreeBSD distributed under "2 clause" BSD license | |
| Copyright © [year] [name] All rights reserved Redistribution in source and binary forms, with or without modification, are permitted, provided that the following conditions are met: |
|
1. Redistribution of source code must retain the above copyright notice, this list of conditions, and the disclaimer. 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions, and the following disclaimer in the documentation and/or other materials provided with the distribution. THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS", AND ANY EXPRESS OR IMPLIED LIMITED WARANTIES... |
| Don't claim that you wrote the code | |
| Don't blame us if the code doesn't work | |
| Apart from that, do anything you want with the code |
| The GPL mandates that source code be disclosed | |
| The BSD License allows source code changes to be kept secret | |
| GPL is often categorised as "Copyleft", as distinct from "Copyright" | |
| BSD License is "Copycentre". We actively encourage third parties to use the source code. | |
| Donating changes back is purely at the discretion of the party making the changes |
| The entire source code for FreeBSD is stored in a CVS repository | |
| The logs, and individual changes for each file can be traced back to 1994. | |
| The source tree can be checked out at any state, or corresponding to any release | |
| CDs are available taking the history back a further 25 years |
| Changes to the FreeBSD tree are available in a number of ways (CVS, CVSup, CTM (e-mail), Web) | |
| It is possible to maintain a local mirror of the complete CVS tree | |
| You can 'tag' a local copy of the tree as buildable, and then selectively include changes from FreeBSD |
| FreeBSD releases maintained using CVS branches | |
| Head of the tree (-current) will become FreeBSD 5.0 | |
| Last major release (4.0) was branched (-stable) | |
| Subsequent minor releases (4.1, 4.2, etc) consist of bug fixes backported from -current, and new features in -current that have been extensively tested | |
| Everyone has complete access to the source code at all times, so incremental releases are not a "Flag day" |
| FreeBSD Source Code | ||
| Available on CD and DVD | ||
| Can be downloaded from ftp.freebsd.org | ||
| Install using two floppy disks, or download ISO images and burn your own CDs | ||
| Changes to the source code | ||
| Can be updated using CVS | ||
| Can be updated using CVSup (faster CVS) | ||
| Can be browsed, with history, on the web, at http://www.freebsd.org/cgi/cvsweb.cgi | ||
| Oracle | |
| Netscape | |
| RealPlayer | |
| Flash | |
| NetBackup | |
| Quake III |
| GNOME | |
| KDE | |
| StarOffice | |
| Netscape | |
| WordPerfect | |
| VMWare | |
| Acrobat | |
| GIMP | |
| CD burning | |
| MP3 ripping/playing | |
| Gnutella / Napster / Limewire | |
| Afterstep / Enlightenment / Sawfish / BlackBox / IceWM … |
| FreeBSD has a 30+ year code lineage | |
| FreeBSD developed as a complete unit | |
| A less restrictive license | |
| FreeBSD widely recognised as performing better, particularly under high load | |
| Cuter logo :-) | |
| http://www.freebsd.org/ | |
| http://www.bsdconeurope.org/ | |
| http://ukug.uk.freebsd.org/ | |
| http://www.daemonnews.org/ | |
| http://www.slashdot.org/bsd/ | |