About the Book
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Pages: 39. Chapters: NeXTSTEP, Darwin, OpenStep, 386BSD, SunOS, Unix File System, Comparison of BSD operating systems, Berkeley Software Distribution, BSD licenses, Ultrix, USL v. BSDi, BSD Daemon, MirOS BSD, List of BSD operating systems, Rhapsody, GNU-Darwin, Berkeley Software Design, Gentoo/Alt, RISC iX, MirOS Licence, Coherent, Version 7 Unix, Virtual CD-ROM switching utility, BSD/OS, Walnut Creek CDROM, Ports collection, Sysctl, Computer Systems Research Group, DEMOS, BSD Authentication, ALTQ, Nagare, MtXinu, Devilette, Light Weight Kernel Threads, Copycenter, IBM Academic Operating System, MachTen, Citrus Project, Securelevel, Kernel Normal Form, HPBSD, Lites, Dynix, MacMach. Excerpt: There are a number of Unix-like operating systems based on or descended from the Berkeley Software Distribution (BSD) series of Unix variants. The three most notable descendants in current use are FreeBSD, OpenBSD, and NetBSD, which are all derived from 386BSD and 4.4BSD-Lite, by various routes. Both NetBSD and FreeBSD started life in 1993, initially derived from 386BSD, but in 1994 migrating to a 4.4BSD-Lite code base. OpenBSD was forked in 1995 from NetBSD. Other notable derivatives include DragonFly BSD, which was forked from FreeBSD 4.8, and Apple Inc.'s iOS and Mac OS X, with its Darwin base including a large amount of code derived from OpenBSD. Most of the current BSD operating systems are open source and available for download, free of charge, under the BSD License, the most notable exception being Mac OS X and iOS. They also generally use a monolithic kernel architecture, apart from Mac OS X and DragonFly BSD which feature hybrid kernels. The various open source BSD projects generally develop the kernel and userland programs and libraries together, the source code being managed using a single central source repository. In the past, BSD was al...
