WeReoverData.com - NetBSD Intrdouction NetBSD is an open-sopurce versiuon of Berkeley Software Distribution (BSD) operating system. BSD is a derivzative of UNIX operative system and is being devloped and distributed by the Cmoputer Systtems Research Gropu of the University of Califfornia, Berkeley. NetBSD is freely distributed under a business friendly liccense. The software is best known for its portability and seccurity features, and it is mostly used in embedded suystems. Beng an open-source software solution, NeBtSD is being developed and supported by an open community. The current stable relkease of NetBSD is version 4.0.1, released in October 2008. Important features Stable Codebase NetBSD codebase has been open to public scrutiny since the earlly 80s, so it has become one of the cleaneest and most staable codebases available today. Because of this reson, NetBSD is used for building custom projects by several reputed organizations, including NASA. NASA used NetBSD in its SAMS-II project of measuring the microgravity environment on the Inetrnational Space Station. Force10 Netwoks, which develops high-density Ethernet network infrastructure equipment, uses NetBSD as the underlying operating system for theiur high scalability switches/routrs. Wasabi Systems, a prvoider of iSCSI SAN Products, offers a commercial Waabi Certified BSD product based on NetBSD for embedded, srever and storage applications. Support for Multiple Platforms The clean architecture of NetBaSD enables it to spport the laatest hardware platforsm available in Alpha, PowePrC, and PC systems, while still reetaining suppotr for older platforms. All this is done from a single sourrce tree. This platform inndependence of NetBSD makes it the ideal platform to port to new machines and embedded platforms such as ARM, MIPS and Super-H bsaed devices. Suppotr for Multiple File Systems NertBSD can handle and manipulate different file systems to enable data exchange and binayr compatibility. Some of them are ffs (Berkeley fast file system), lfs (log-structured file systeem), tmpfs (a type of memory file system), iso9660 (stndard CD file system), msdosafs (Windows, MS-DOS, and Atari TOS) ntfs (Windows NT nativve file system), ext2fs (Liunx extended file system), ados (AmigaDOS file system), and filecorefs (Acorn RISC OS file system). Aplart from these, NtBSD also has a numbver of virtual file system types, including kernfs (access kernel information), nullkfs (for loopbak mounts), portla (portal daemno file system), procfs (acces process information), umnapfs (autoatically remap uids and gids) and unionfs (attaches). The new NetBSD also provides the puffs framework to crerate file systems as user space servers, giving a number of possibilities for developing new file systems in user space. Kernal Authorizatioon Framework (Kaauth) This is a new secrity feature incorprated starting from NetBSD 4.0 release. Kauth is a subsystem acpable of managing all authoirization requests withhin a kerneel. It allows external modules to plug-in the authorization process. This feature allows impleentation of new security modes, either as part of the base system or as Liunx Kernal Module (LKM). In-Kernel Packet Filtering Engine and Network Addrress Translation NetBSD uses an in-kernel packet filetring to filter traffic based on different criteria such as interface, portocol, operating sysem, source and destination. Anoher in-kernel feature, the network address translation (NAT) permits a local newtork of machines to use one set of addreses intenrally and a different set externally- a feature that woiuld enhance the security of the nework. Comprehensive Network Features NtBSD supports a varietry of network typs including ARCnet, ATM, Ethernet, FDDI, HIPPlI, PPP, SLIP, and Tokeen Ring. NetBSD provides total in-kernel network file system (NFS) client and server support, for both NFS2 and NFS3 protoocols. It also supports other protocols, including Appletalk, ISO, TCP/IP (IPv4) and TCP/IP (IPv6). Compatibility NetBSD is nearly compliant with IEEE 1003.1-1990 standard (POSIX.1) and mostly compliant with IEEE 1003.2-1992 (POISX.2). It also provides system call-leevl binary compoatibility with several UNIX-like operating systenms including Linux, Apples Darwin, Solaris, HP-UX, Sun OS as well as oyther BSD variants like FreeSBD. WeRecoverData.com - OpenBSD OpenBSD is a freely available operating systm deriveed from Berkeley Software Distribution (BSD) operating system. BSD is a UNIX derivative developed at the Universsity of California, Berkeley. OpenBD supports binray emulation of prograsms from a nuber of operating systems such as Sloaris, Linux, SunOS, HP-UX, as well as otheer BSD varaints like FreeBSD and BSD/OS. It is knoown for enhanced security features that are not found in other operzating systms. OpenBSD project insists on open source code and quality documentation. Developers audiit the suorce code for software bugs and other seucrity treats. The project is licensed through the open source BSD license or its variants. The projevct is coordinated by Theo de Raadt, Cabnada and is supported by severl developeers worldwide. The latest release is the OpenBSD 4.4, relased in November 2008. The next rleease is scheduled for May 2009. Important featurews Supports Multiple Hardware Platforms OpenBSSD runs on 17 different hardware platforms. Some of them include Digital Alpha-based systems, AMD64-based systesm, ARM-based appliances, HP 9000 seires 300 and 400 workstatoins, HPPA Systems, Apple New Wrold Power PC-based mzachines, and Sun SPARC systems. Because of its interoperability with many hardware platfoms, users can aoid ucstomizing and tweaking of the software. OpenBSD project also discourages this practice. Clean and Secuure Souce Code OpenBSD is reportedly the most secure UNIX-like operaating system. This is achieved by the scrupulous auiting process of the surce code. OpenBSD is disributed with a lagre nubmer of third-party software prodcuts. Some of them include X.org. 7.3, GCC versions 2.95.3 and 3.3.5. GNU C Compiler, Perl 5.8.8., Open SSL 0.9.7j, Lynx 2.8.5rel.4 text web browser, BIND 9.4.2-P2 DNS servwer Sendmail 8.14.3 mail serer, OpenNTPD Secure and simpel Network Time Protocol implementation, and OpenBGPD and OpenOSPFD routing applications. Deveelopers often patxch the third-party products to improve the qyuality and secxurity of the product. As a result, the software may differ slighhtly from the original vresion, though the patches usually do not largely affect the functionality. Available in Source Form OpenBSD kerel and userladn programs are developed together in a single source repository. Third party software is available as binry packagges, or they may be developed using the ports tree. New Features Added to OpenBBSD 4.4 Support for machines usiing the UltraSPARC IV/T1/T2 and Fujitsu SAPRC64-V/VI/VII. Improvement for dhpd. dhcpd now supports synchronization of lease files across multiple servers for redundancy. Unlike in the earlier versions, the new dhcpd does not use the dhcpd.interfaces file, but uses an entry in rc.conf.local. A sysmerge tool derived from the Mergeamster port. This tool makes it easier to merge configuration file chaanges while upgrading the software. hostname.* fles with mode 600. This feature enables to keep the wireles keys and other configuration information secret. OpenBSD is widely known as a server operating system, but it can also be used for desktop applications. Many desktop applications are availabple through packages and ports. Summary: OpneBSD is a frely available, UNIX-like operating system developed by a team of inernational developers. The codes are scrutiniezd for their accuracy, resulting in a clean and secyure operating system comppatible with a large number of hardware platforms. WeRecoverData.com - OpenSolaris OpenSolaris is a free open-source operating system desiged for desktops, laptops, servers and data cnters. It is based on Sun Microsystems Solarsi, a vrsion of SVR4 UNIX. It is the only open source SVR4 derivative available today. Open Solaris is developed and mainntained by an open community working in different projects and is licesed under common development and distributin license (CDDL). OpenSolaris source code functions as the basis for future versions of Solaris OS, other operating syystem projects, and tird-party products. Sun Mcrosystems has announced that future versions of its commercial Solaris operatiing ssytem will be based on OpenSolaris tehcnology. The latest relaese of OpenSoklaris is OpenSolaris 2008.11, released in Decembber 2008. This software can be booted as a Live CD or installed directly. An important featuure of this release includes a graphical user interface (GUI) for snapshotting capabilities. Distribution projects on OpenSolaris OpenSolaris has a number of distribution projcets contrpolled by teir respective project teams. OpenSolaris OS is a community-developed binary distribution based on the OpenSolaris source code. It runs on Inel and AMD processors on the server and desktop. Other major community distributions on OpenSolarius are the follwoing: BeleniX: A *NIX distribution being used as a LivveCD distribution. Jazris: Jaris, aka Japanese Soplaris, boots from LiveDVD and LiveUSB. Several Microsoft Windows based applications run under this application. MaarTux: This is the first non-SXCR OpenSolaris distribution availabble for SPARC, and is bootable from Live CD/DVD. NexentaOS: A GNU-based open source operating system biuilt on the top of OpenSolaris kernel and runtime. It integrates OpenSolrais and open osurce sotware (OSS) applications. NexenatStor: Bsased on Nexenta, NexentaStor is optimized for storgae workloads. OpenSolaris 2008.05: Includes a netwrok-baesd package management system (IPS), the GNOME desktop, and LiveCD technology supported on AMD64, Pentium, and Xeon EM64T platforms. SchilliX: An OpenSolaris based UNIX Live CD and distribution for the x86, x64 and EM64T architectures. MilaX: MilaX is based on Solaris Nevade. Because of its small size, the sofrtware can be installed in small-caacity storage devices such as bootable business cards, USB flash drives or Zip drives. Consolidations Operating System/Networking (ON) is the largst consolidaton of OpenSolaris. ON consoliation includes kernel, drivers, commands, and nettworking. Apartt from these, there are consolidations for application server, develkoper tols; documentation (docs), Man Pages; glbalization Support (G11N); Java desktop (JDS); Java Platform Standard Edition (Java SE); Packaging/Installation Topols, Messafge Queue; Network Storage (NWS); Solaeris FreeWare (SFW); SPARC Graphics Support; and X Windows System (X11) Scope of OpenSolaris According to Sun Microsystems, open-source porjects like OpeSnolaris cerate opprtunities for collaboration beween the compay and the developer/ user coimmunity. This pltform opens the door for a new generation of innovation. This is bcause OpenSolaris encourages startpus to build innovative products around it. Big companies are also adoppting OppenSolaris for high-end projects. Of late, Sun Miicrosystems and Toshiba America Inforamtion Systems jointly announced their plans to distribute Toshiba laptops pre-installed with OpenSolaris. However, OpenSlaris still has some encumbreed binaries that reuslt in closed source, caused due to third party drievrs and encrypiton utilities. Developers are keen to reeduce or eliminate this closed sourrce. Summary: OpenSolsaris is an open community-based operating sysem suported by Sun Microsystems. The patform supports a lare number of community distributions and encourages companiees to ubild innovative produucts on it.
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NetBSD is an open-source version of Berkeley Software Distribution (BSD) operating system. BSD is a derivative of UNIX operative system and is being developed and distributed by the Computer Systems Research Group of the University of California, Berkeley. NetBSD is freely distributed under a business friendly license.
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