Improve the introduction chapter, to fix the overall structure
of that part. The diff is a bit large due to changed indentation, but it's mostly about moving the <sect2> a bit further down and shortening the introduction part. Reviewed by: bcr@ Approved by: bcr@ Differential Revision: https://reviews.freebsd.org/D16167
This commit is contained in:
Edward Tomasz Napierala
parent
d623c966e8
commit
a2018a60a6
Notes:
svn2git
2020-12-08 03:00:23 +00:00
svn path=/head/; revision=51981
1 changed files with 104 additions and 113 deletions
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@ -63,123 +63,114 @@
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<indexterm><primary>4.4BSD-Lite</primary></indexterm>
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<para>&os; is an Open Source, Unix-like operating system for x86
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(both 32 and 64 bit), &arm;, AArch64, &risc-v;, &mips;, &power;,
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&powerpc;, and Sun &ultrasparc; computers, originally based
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on 4.4BSD-Lite. You can also read about
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<link linkend="history">the history of &os;</link>, or the
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<link xlink:href="&url.base;/releases">current release</link>.
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If you are interested in contributing something to the Project
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(code, hardware, funding), see the <link
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xlink:href="&url.articles.contributing;/index.html">Contributing
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to &os;</link> article.</para>
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<para>&os; is an Open Source, standards-compliant Unix-like
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operating system for x86 (both 32 and 64 bit), &arm;, AArch64,
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&risc-v;, &mips;, &power;, &powerpc;, and Sun &ultrasparc;
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computers. It provides all the features that are
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nowadays taken for granted, such as preemptive multitasking,
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memory protection, virtual memory, multi-user facilities, SMP
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support, all the Open Source development tools for different
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languages and frameworks, and desktop features centered around
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X Window System, KDE, or GNOME. Its particular strengths
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are:</para>
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<itemizedlist>
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<listitem>
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<para><emphasis>Liberal Open Source license</emphasis>,
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which grants you rights to freely modify and extend
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its source code and incorporate it in both Open Source
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projects and closed products without imposing
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restrictions typical to copyleft licenses, as well
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as avoiding potential license incompatibility
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problems.</para>
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</listitem>
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<listitem>
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<para><emphasis>Strong TCP/IP networking</emphasis>
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<indexterm> <primary>TCP/IP
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networking</primary></indexterm> - &os;
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implements industry standard protocols with ever
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increasing performance and scalability. This makes
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it a good match in both server, and routing/firewalling
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roles - and indeed many companies and vendors use it
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precisely for that purpose.</para>
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</listitem>
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<listitem>
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<para><emphasis>Fully integrated OpenZFS support</emphasis>,
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including root-on-ZFS, ZFS Boot Environments, fault
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management, administrative delegation, support for jails,
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&os; specific documentation, and system installer
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support.</para>
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</listitem>
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<listitem>
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<para><emphasis>Extensive security features</emphasis>,
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from the Mandatory Access Control framework to Capsicum
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capability and sandbox mechanisms.</para>
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</listitem>
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<listitem>
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<para><emphasis>Over 30 thousand prebuilt
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packages</emphasis> for all supported architectures,
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and the Ports Collection which makes it easy to build your
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own, customized ones.</para>
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</listitem>
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<listitem>
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<para><emphasis>Documentation</emphasis> - in addition
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to Handbook and books from different authors that cover
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topics ranging from system administration to kernel
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internals, there are also the &man.man.1; pages, not only
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for userspace daemons, utilities, and configuration files,
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but also for kernel driver APIs (section 9) and individual
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drivers (section 4).</para>
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</listitem>
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<listitem>
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<para><emphasis>Simple and consistent repository structure
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and build system</emphasis> - &os; uses a single
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repository for all of its components, both kernel and
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userspace. This, along with an unified and easy to
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customize build system and a well thought out development
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process makes it easy to integrate &os; with build
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infrastructure for your own product.</para>
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</listitem>
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<listitem>
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<para><emphasis>Staying true to Unix philosophy</emphasis>,
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preferring composability instead of monolithic <quote>all
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in one</quote> daemons with hardcoded behavior.</para>
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</listitem>
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<listitem>
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<para><indexterm> <primary>binary compatibility</primary>
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<secondary>Linux</secondary></indexterm>
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<emphasis>Binary compatibility</emphasis> with Linux,
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which makes it possible to run many Linux binaries without
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the need for virtualisation.</para>
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</listitem>
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</itemizedlist>
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<para>&os; is based on the 4.4BSD-Lite<indexterm>
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<primary>4.4BSD-Lite</primary>
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</indexterm> release from Computer
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Systems Research Group (CSRG)<indexterm>
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<primary>Computer Systems Research Group (CSRG)</primary>
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</indexterm> at the University of California at Berkeley, and
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carries on the distinguished tradition of BSD systems
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development. In addition to the fine work provided by CSRG,
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the &os; Project has put in many thousands of man-hours
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into extending the functionality and fine-tuning the system
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for maximum performance and reliability
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in real-life load situations. &os; offers performance and
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reliability on par with other Open Source and commercial
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offerings, combined with cutting-edge features not available
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anywhere else.</para>
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<sect2 xml:id="os-overview">
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<title>What Can &os; Do?</title>
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<para>&os; is a complete, Open Source, standards-compliant
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Unix system, with all the associated features that are
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nowadays taken for granted, such as preemptive multitasking,
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memory protection, virtual memory, multi-user facilities, SMP
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support, all the Open Source development tools for different
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languages and frameworks, and desktop features centered around
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X Window System, KDE, or GNOME. Its particular strengths
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are:</para>
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<itemizedlist>
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<listitem>
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<para><emphasis>Liberal Open Source license</emphasis>,
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which grants you rights to freely modify and extend
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its source code and incorporate it in both Open Source
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projects and closed products without imposing
|
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restrictions typical to copyleft licenses, as well
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as avoiding potential license incompatibility
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problems.</para>
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</listitem>
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<listitem>
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<para><emphasis>Strong TCP/IP networking</emphasis>
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<indexterm> <primary>TCP/IP
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networking</primary></indexterm> - &os;
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implements industry standard protocols with ever
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increasing performance and scalability. This makes
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it a good match in both server, and routing/firewalling
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roles - and indeed many companies and vendors use it
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precisely for that purpose.</para>
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</listitem>
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<listitem>
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<para><emphasis>Fully integrated OpenZFS support</emphasis>,
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including root-on-ZFS, ZFS Boot Environments, fault
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management, administrative delegation, support for jails,
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&os; specific documentation, and system installer
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support.</para>
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</listitem>
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<listitem>
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<para><emphasis>Extensive security features</emphasis>,
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from the Mandatory Access Control framework to Capsicum
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capability and sandbox mechanisms.</para>
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</listitem>
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<listitem>
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<para><emphasis>Over 30 thousand prebuilt
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packages</emphasis> for all supported architectures,
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and the Ports Collection which makes it easy to build your
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own, customized ones.</para>
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</listitem>
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<listitem>
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<para><emphasis>Documentation</emphasis> - in addition
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to Handbook and books from different authors that cover
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topics ranging from system administration to kernel
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internals, there are also the &man.man.1; pages, not only
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for userspace daemons, utilities, and configuration files,
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but also for kernel driver APIs (section 9) and individual
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drivers (section 4).</para>
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</listitem>
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<listitem>
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<para><emphasis>Simple and consistent repository structure
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and build system</emphasis> - &os; uses a single
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repository for all of its components, both kernel and
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userspace. This, along with an unified and easy to
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customize build system and a well thought out development
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process makes it easy to integrate &os; with build
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infrastructure for your own product.</para>
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</listitem>
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<listitem>
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<para><emphasis>Staying true to Unix philosophy</emphasis>,
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preferring composability instead of monolithic <quote>all
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in one</quote> daemons with hardcoded behaviour.</para>
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</listitem>
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<listitem>
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<para><indexterm> <primary>binary compatibility</primary>
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<secondary>Linux</secondary></indexterm>
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<emphasis>Binary compatibility</emphasis> with Linux,
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which makes it possible to run many Linux binaries without
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the need for virtualisation.</para>
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</listitem>
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</itemizedlist>
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<para>&os; is based on the 4.4BSD-Lite<indexterm>
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<primary>4.4BSD-Lite</primary>
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</indexterm> release from Computer
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Systems Research Group (CSRG)<indexterm>
|
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<primary>Computer Systems Research Group (CSRG)</primary>
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</indexterm> at the University of California at Berkeley, and
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carries on the distinguished tradition of BSD systems
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development. In addition to the fine work provided by CSRG,
|
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the &os; Project has put in many thousands of man-hours
|
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into extending the functionality and fine-tuning the system
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for maximum performance and reliability
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in real-life load situations. &os; offers performance and
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reliability on par with other Open Source and commercial
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offerings, combined with cutting-edge features not available
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anywhere else.</para>
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<para>The applications to which &os; can be put are truly
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limited only by your own imagination. From software
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development to factory automation, inventory control to
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|
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|||
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