Update the features list to something that better fits the current century.
Reviewed by: allanjude@ Approved by: allanjude@ Differential Revision: https://reviews.freebsd.org/D15868
This commit is contained in:
Edward Tomasz Napierala
parent
798defac47
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62218f2ae5
Notes:
svn2git
2020-12-08 03:00:23 +00:00
svn path=/head/; revision=51889
1 changed files with 63 additions and 114 deletions
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@ -77,141 +77,90 @@
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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; has many noteworthy features. Some of these
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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 strenghts
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are:</para>
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<itemizedlist>
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<listitem>
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<para><emphasis>Preemptive multitasking</emphasis>
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<indexterm>
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<primary>preemptive multitasking</primary>
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</indexterm> with dynamic priority adjustment to ensure
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smooth and fair sharing of the computer between
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applications and users, even under the heaviest of
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loads.</para>
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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>Multi-user facilities</emphasis><indexterm>
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<primary>multi-user facilities</primary>
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</indexterm> which allow many people to use a &os; system
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simultaneously for a variety of things. This means, for
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example, that system peripherals such as printers and tape
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drives are properly shared between all users on the system
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or the network and that individual resource limits can be
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placed on users or groups of users, protecting critical
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system resources from over-use.</para>
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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>Strong <emphasis>TCP/IP
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networking</emphasis><indexterm>
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<primary>TCP/IP networking</primary>
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</indexterm> with support for industry standards such as
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SCTP, DHCP, NFS, NIS, PPP, SLIP, IPsec, and IPv6. This
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means that your &os; machine can interoperate easily with
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other systems as well as act as an enterprise server,
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providing vital functions such as NFS (remote file access)
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and email services or putting your organization on the
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Internet with WWW, FTP, routing and firewall (security)
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services.</para>
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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>Memory protection</emphasis><indexterm>
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<primary>memory protection</primary>
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</indexterm> ensures that applications (or users) cannot
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interfere with each other. One application crashing will
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not affect others in any way.</para>
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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>The industry standard
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<emphasis>X Window System</emphasis><indexterm>
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<primary>X Window System</primary>
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</indexterm> (X11R7) can provide a graphical user
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interface (GUI) on any machine and comes with full
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sources.</para>
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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>
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<indexterm>
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<primary>binary compatibility</primary>
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<secondary>Linux</secondary>
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</indexterm>
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<emphasis>Binary compatibility</emphasis> with many
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programs built for Linux.</para>
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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>Thousands of <emphasis>ready-to-run</emphasis>
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applications are available from the &os;
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<emphasis>ports</emphasis> and
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<emphasis>packages</emphasis> collection. Why search the
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net when you can find it all right here?</para>
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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>Thousands of additional and
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<emphasis>easy-to-port</emphasis> applications are
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available on the Internet. &os; is source code compatible
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with most popular commercial &unix; systems and thus most
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applications require few, if any, changes to
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compile.</para>
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</listitem>
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<listitem>
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<para>Demand paged <emphasis>virtual
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memory</emphasis><indexterm>
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<primary>virtual memory</primary>
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</indexterm> and <quote>merged VM/buffer cache</quote>
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design efficiently satisfies applications with large
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appetites for memory while still maintaining interactive
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response to other users.</para>
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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><emphasis>SMP</emphasis><indexterm>
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<primary>Symmetric Multi-Processing
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(SMP)</primary>
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</indexterm> support for machines with multiple
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CPUs.</para>
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</listitem>
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<listitem>
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<para>
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<indexterm>
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<primary>compilers</primary>
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<secondary>C</secondary>
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</indexterm>
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<indexterm>
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<primary>compilers</primary>
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<secondary>C++</secondary>
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</indexterm>
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A full complement of <emphasis>C</emphasis>
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and <emphasis>C++</emphasis>
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development tools.
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Many additional languages for advanced research
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and development are also available in the ports and
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packages collection.</para>
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</listitem>
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<listitem>
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<para><emphasis>Source code</emphasis><indexterm>
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<primary>source code</primary>
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</indexterm> for the entire system means you have the
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greatest degree of control over your environment. Why be
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locked into a proprietary solution at the mercy of your
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vendor when you can have a truly open system?</para>
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</listitem>
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<listitem>
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<para>Extensive <emphasis>online
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documentation</emphasis>.</para>
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</listitem>
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<listitem>
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<para><emphasis>And many more!</emphasis></para>
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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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@ -223,11 +172,13 @@
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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 hours in
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fine tuning the system for maximum performance and reliability
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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 commercial offerings, combined with
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many cutting-edge features not available anywhere else.</para>
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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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likely that you can do it with &os; too! &os; also benefits
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significantly from literally thousands of high quality
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applications developed by research centers and universities
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around the world, often available at little to no cost.
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Commercial applications are also available and appearing in
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greater numbers every day.</para>
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around the world, often available at little to no cost.</para>
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<para>Because the source code for &os; itself is generally
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available, the system can also be customized to an almost
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