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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN">
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<title>The Debian GNU/Linux FAQ - Definitions and overview</title>
<link href="index.en.html" rel="start">
<link href="index.en.html" rel="prev">
<link href="ch-getting.en.html" rel="next">
<link href="index.en.html#contents" rel="contents">
<link href="index.en.html#copyright" rel="copyright">
<link href="ch-basic_defs.en.html" rel="chapter" title="1 Definitions and overview">
<link href="ch-getting.en.html" rel="chapter" title="2 Getting and installing Debian GNU/Linux">
<link href="ch-choosing.en.html" rel="chapter" title="3 Choosing a Debian distribution">
<link href="ch-compat.en.html" rel="chapter" title="4 Compatibility issues">
<link href="ch-software.en.html" rel="chapter" title="5 Software available in the Debian system">
<link href="ch-ftparchives.en.html" rel="chapter" title="6 The Debian FTP archives">
<link href="ch-pkg_basics.en.html" rel="chapter" title="7 Basics of the Debian package management system">
<link href="ch-pkgtools.en.html" rel="chapter" title="8 The Debian package management tools">
<link href="ch-uptodate.en.html" rel="chapter" title="9 Keeping your Debian system up-to-date">
<link href="ch-kernel.en.html" rel="chapter" title="10 Debian and the kernel">
<link href="ch-customizing.en.html" rel="chapter" title="11 Customizing your installation of Debian GNU/Linux">
<link href="ch-support.en.html" rel="chapter" title="12 Getting support for Debian GNU/Linux">
<link href="ch-contributing.en.html" rel="chapter" title="13 Contributing to the Debian Project">
<link href="ch-redistrib.en.html" rel="chapter" title="14 Redistributing Debian GNU/Linux in a commercial product">
<link href="ch-nexttime.en.html" rel="chapter" title="15 Changes expected in the next major release of Debian">
<link href="ch-faqinfo.en.html" rel="chapter" title="16 General information about the FAQ">
<link href="ch-basic_defs.en.html#s-whatisfaq" rel="section" title="1.1 What is this FAQ?">
<link href="ch-basic_defs.en.html#s-whatisdebian" rel="section" title="1.2 What is Debian GNU/Linux?">
<link href="ch-basic_defs.en.html#s-linux" rel="section" title="1.3 OK, now I know what Debian is... what is Linux?!">
<link href="ch-basic_defs.en.html#s-non-linux" rel="section" title="1.4 Does Debian just do GNU/Linux?">
<link href="ch-basic_defs.en.html#s-difference" rel="section" title="1.5 What is the difference between Debian GNU/Linux and other Linux distributions? Why should I choose Debian over some other distribution?">
<link href="ch-basic_defs.en.html#s-gnu" rel="section" title="1.6 How does the Debian project fit in or compare with the Free Software Foundation's GNU project?">
<link href="ch-basic_defs.en.html#s-pronunciation" rel="section" title="1.7 How does one pronounce Debian and what does this word mean?">
<link href="ch-getting.en.html#s-version" rel="section" title="2.1 What is the latest version of Debian?">
<link href="ch-getting.en.html#s-updatestable" rel="section" title="2.2 Are there package upgrades in `stable'?">
<link href="ch-getting.en.html#s-boot-floppies" rel="section" title="2.3 Where/how can I get the Debian installation disks?">
<link href="ch-getting.en.html#s-cdrom" rel="section" title="2.4 How do I install the Debian from CD-ROMs?">
<link href="ch-getting.en.html#s-cdimage-symlinks" rel="section" title="2.5 Why does the official stable released CD-ROM contain symlinks for `frozen' and `unstable'? I thought this CD contains just `stable'!">
<link href="ch-getting.en.html#s-remoteinstall" rel="section" title="2.6 Can I get and install Debian directly from a remote Internet site?">
<link href="ch-getting.en.html#s-alternativebootinstaller" rel="section" title="2.7 Are there any alternative strategies for booting the system installer?">
<link href="ch-choosing.en.html#s3.1" rel="section" title="3.1 Which Debian distribution (stable/testing/unstable) is better for me?">
<link href="ch-choosing.en.html#s3.2" rel="section" title="3.2 But what about Knoppix, Linex, Ubuntu, and others?">
<link href="ch-compat.en.html#s-arches" rel="section" title="4.1 On what hardware architectures/systems does Debian GNU/Linux run?">
<link href="ch-compat.en.html#s-otherdistribs" rel="section" title="4.2 How compatible is Debian with other distributions of Linux?">
<link href="ch-compat.en.html#s-otherunices" rel="section" title="4.3 How source code compatible is Debian with other Unix systems?">
<link href="ch-compat.en.html#s-otherpackages" rel="section" title="4.4 Can I use Debian packages (".deb" files) on my Red Hat/Slackware/... Linux system? Can I use Red Hat packages (".rpm" files) on my Debian GNU/Linux system?">
<link href="ch-compat.en.html#s-non-debian-programs" rel="section" title="4.5 How should I install a non-Debian program?">
<link href="ch-compat.en.html#s-termcap" rel="section" title="4.6 Why can't I compile programs that require libtermcap?">
<link href="ch-compat.en.html#s-accelx" rel="section" title="4.7 Why can't I install AccelX?">
<link href="ch-compat.en.html#s-motifnls" rel="section" title="4.8 Why do my old XFree 2.1 Motif applications crash?">
<link href="ch-software.en.html#s-apps" rel="section" title="5.1 What types of applications and development software are available for Debian GNU/Linux?">
<link href="ch-software.en.html#s-softwareauthors" rel="section" title="5.2 Who wrote all that software?">
<link href="ch-software.en.html#s-pkglist" rel="section" title="5.3 How can I get a current list of programs that have been packaged for Debian?">
<link href="ch-software.en.html#s-buildenv" rel="section" title="5.4 How can I install a developer's environment to build packages?">
<link href="ch-software.en.html#s-missing" rel="section" title="5.5 What is missing from Debian GNU/Linux?">
<link href="ch-software.en.html#s-no-devs" rel="section" title="5.6 Why do I get "ld: cannot find -lfoo" messages when compiling programs? Why aren't there any libfoo.so files in Debian library packages?">
<link href="ch-software.en.html#s-java" rel="section" title="5.7 (How) Does Debian support Java?">
<link href="ch-software.en.html#s-isitdebian" rel="section" title="5.8 How can I check that I am using a Debian system, and what version is it?">
<link href="ch-software.en.html#s-nonenglish" rel="section" title="5.9 How does Debian support non-English languages?">
<link href="ch-software.en.html#s-pine" rel="section" title="5.10 Where is pine?">
<link href="ch-software.en.html#s-qmail" rel="section" title="5.11 Where is qmail/ezmlm/djbdns?">
<link href="ch-software.en.html#s-flash" rel="section" title="5.12 Where is a player for Flash (SWF)?">
<link href="ch-software.en.html#s-googleearth" rel="section" title="5.13 Where is Google Earth?">
<link href="ch-software.en.html#s-voip" rel="section" title="5.14 Where is VoIP software?">
<link href="ch-software.en.html#s-nonfreewireless" rel="section" title="5.15 I have a wireless network card which doesn't work with Linux. What should I do?">
<link href="ch-ftparchives.en.html#s-dists" rel="section" title="6.1 How many Debian distributions are there?">
<link href="ch-ftparchives.en.html#s-codenames" rel="section" title="6.2 What are all those names like etch, lenny, etc.?">
<link href="ch-ftparchives.en.html#s-sid" rel="section" title="6.3 What about "sid"?">
<link href="ch-ftparchives.en.html#s-stable" rel="section" title="6.4 What does the stable directory contain?">
<link href="ch-ftparchives.en.html#s-testing" rel="section" title="6.5 What does the testing distribution contain?">
<link href="ch-ftparchives.en.html#s-unstable" rel="section" title="6.6 What does the unstable distribution contain?">
<link href="ch-ftparchives.en.html#s-dirtree" rel="section" title="6.7 What are all those directories at the Debian FTP archives?">
<link href="ch-ftparchives.en.html#s-archsections" rel="section" title="6.8 What are all those directories inside <samp>dists/stable/main</samp>?">
<link href="ch-ftparchives.en.html#s-source" rel="section" title="6.9 Where is the source code?">
<link href="ch-ftparchives.en.html#s-pools" rel="section" title="6.10 What's in the <samp>pool</samp> directory?">
<link href="ch-ftparchives.en.html#s-incoming" rel="section" title="6.11 What is "incoming"?">
<link href="ch-ftparchives.en.html#s-ownrepository" rel="section" title="6.12 How do I set up my own apt-able repository?">
<link href="ch-pkg_basics.en.html#s-package" rel="section" title="7.1 What is a Debian package?">
<link href="ch-pkg_basics.en.html#s-deb-format" rel="section" title="7.2 What is the format of a Debian binary package?">
<link href="ch-pkg_basics.en.html#s-pkgname" rel="section" title="7.3 Why are Debian package file names so long?">
<link href="ch-pkg_basics.en.html#s-controlfile" rel="section" title="7.4 What is a Debian control file?">
<link href="ch-pkg_basics.en.html#s-conffile" rel="section" title="7.5 What is a Debian conffile?">
<link href="ch-pkg_basics.en.html#s-maintscripts" rel="section" title="7.6 What is a Debian preinst, postinst, prerm, and postrm script?">
<link href="ch-pkg_basics.en.html#s-priority" rel="section" title="7.7 What is an <em>Essential</em>, <em>Required</em>, <em>Important</em>, <em>Standard</em>, <em>Optional</em>, or <em>Extra</em> package?">
<link href="ch-pkg_basics.en.html#s-virtual" rel="section" title="7.8 What is a Virtual Package?">
<link href="ch-pkg_basics.en.html#s-depends" rel="section" title="7.9 What is meant by saying that a package <em>Depends</em>, <em>Recommends</em>, <em>Suggests</em>, <em>Conflicts</em>, <em>Replaces</em> or <em>Provides</em> another package?">
<link href="ch-pkg_basics.en.html#s-pre-depends" rel="section" title="7.10 What is meant by Pre-Depends?">
<link href="ch-pkg_basics.en.html#s-pkgstatus" rel="section" title="7.11 What is meant by <em>unknown</em>, <em>install</em>, <em>remove</em>, <em>purge</em> and <em>hold</em> in the package status?">
<link href="ch-pkg_basics.en.html#s-puttingonhold" rel="section" title="7.12 How do I put a package on hold?">
<link href="ch-pkg_basics.en.html#s-sourcepkgs" rel="section" title="7.13 How do I install a source package?">
<link href="ch-pkg_basics.en.html#s-sourcebuild" rel="section" title="7.14 How do I build binary packages from a source package?">
<link href="ch-pkg_basics.en.html#s-creatingdebs" rel="section" title="7.15 How do I create Debian packages myself?">
<link href="ch-pkgtools.en.html#s-pkgprogs" rel="section" title="8.1 What programs does Debian provide for managing its packages?">
<link href="ch-pkgtools.en.html#s-updaterunning" rel="section" title="8.2 Debian claims to be able to update a running program; how is this accomplished?">
<link href="ch-pkgtools.en.html#s-whatpackages" rel="section" title="8.3 How can I tell what packages are already installed on a Debian system?">
<link href="ch-pkgtools.en.html#s-listfiles" rel="section" title="8.4 How to display the files of a package installed?">
<link href="ch-pkgtools.en.html#s-filesearch" rel="section" title="8.5 How can I find out what package produced a particular file?">
<link href="ch-pkgtools.en.html#s-datapackages" rel="section" title="8.6 Why doesn't get `foo-data' removed when I uninstall `foo'? How do I make sure old unused library-packages get purged?">
<link href="ch-uptodate.en.html#s-howtocurrent" rel="section" title="9.1 How can I keep my Debian system current?">
<link href="ch-uptodate.en.html#s-upgradesingle" rel="section" title="9.2 Must I go into single user mode in order to upgrade a package?">
<link href="ch-uptodate.en.html#s-savedebs" rel="section" title="9.3 Do I have to keep all those .deb archive files on my disk?">
<link href="ch-uptodate.en.html#s-keepingalog" rel="section" title="9.4 How can I keep a log of the packages I added to the system? I'd like to know when which package upgrades and removals have occured!">
<link href="ch-uptodate.en.html#s-autoupdate" rel="section" title="9.5 Can I automatically update the system?">
<link href="ch-uptodate.en.html#s-aptproxy" rel="section" title="9.6 I have several machines how can I download the updates only one time?">
<link href="ch-kernel.en.html#s-non-debian-kernel" rel="section" title="10.1 Can I install and compile a kernel without some Debian-specific tweaking?">
<link href="ch-kernel.en.html#s-customkernel" rel="section" title="10.2 What tools does Debian provide to build custom kernels?">
<link href="ch-kernel.en.html#s-custombootdisk" rel="section" title="10.3 How can I make a custom boot floppy?">
<link href="ch-kernel.en.html#s-modules" rel="section" title="10.4 What special provisions does Debian provide to deal with modules?">
<link href="ch-kernel.en.html#s-removeoldkernel" rel="section" title="10.5 Can I safely de-install an old kernel package, and if so, how?">
<link href="ch-customizing.en.html#s-papersize" rel="section" title="11.1 How can I ensure that all programs use the same paper size?">
<link href="ch-customizing.en.html#s-hardwareaccess" rel="section" title="11.2 How can I provide access to hardware peripherals, without compromising security?">
<link href="ch-customizing.en.html#s-consolefont" rel="section" title="11.3 How do I load a console font on startup the Debian way?">
<link href="ch-customizing.en.html#s-appdefaults" rel="section" title="11.4 How can I configure an X11 program's application defaults?">
<link href="ch-customizing.en.html#s-booting" rel="section" title="11.5 Every distribution seems to have a different boot-up method. Tell me about Debian's.">
<link href="ch-customizing.en.html#s-custombootscripts" rel="section" title="11.6 It looks as if Debian does not use <samp>rc.local</samp> to customize the boot process; what facilities are provided?">
<link href="ch-customizing.en.html#s-interconffiles" rel="section" title="11.7 How does the package management system deal with packages that contain configuration files for other packages?">
<link href="ch-customizing.en.html#s-divert" rel="section" title="11.8 How do I override a file installed by a package, so that a different version can be used instead?">
<link href="ch-customizing.en.html#s-localpackages" rel="section" title="11.9 How can I have my locally-built package included in the list of available packages that the package management system knows about?">
<link href="ch-customizing.en.html#s-diverse" rel="section" title="11.10 Some users like mawk, others like gawk; some like vim, others like elvis; some like trn, others like tin; how does Debian support diversity?">
<link href="ch-support.en.html#s-debiandocs" rel="section" title="12.1 What other documentation exists on and for a Debian system?">
<link href="ch-support.en.html#s-onlineresources" rel="section" title="12.2 Are there any on-line resources for discussing Debian?">
<link href="ch-support.en.html#s-searchtools" rel="section" title="12.3 Is there a quick way to search for information on Debian GNU/Linux?">
<link href="ch-support.en.html#s-buglogs" rel="section" title="12.4 Are there logs of known bugs?">
<link href="ch-support.en.html#s-bugreport" rel="section" title="12.5 How do I report a bug in Debian?">
<link href="ch-contributing.en.html#s-contrib" rel="section" title="13.1 How can I become a Debian software developer?">
<link href="ch-contributing.en.html#s-contribresources" rel="section" title="13.2 How can I contribute resources to the Debian project?">
<link href="ch-contributing.en.html#s-supportingorganizations" rel="section" title="13.3 How can I contribute financially to the Debian project?">
<link href="ch-redistrib.en.html#s-sellcds" rel="section" title="14.1 Can I make and sell Debian CDs?">
<link href="ch-redistrib.en.html#s-packagednonfree" rel="section" title="14.2 Can Debian be packaged with non-free software?">
<link href="ch-redistrib.en.html#s-childistro" rel="section" title="14.3 I am making a special Linux distribution for a "vertical market". Can I use Debian GNU/Linux for the guts of a Linux system and add my own applications on top of it?">
<link href="ch-redistrib.en.html#s-commercialdebs" rel="section" title="14.4 Can I put my commercial program in a Debian "package" so that it installs effortlessly on any Debian system?">
<link href="ch-nexttime.en.html#s-i18n" rel="section" title="15.1 Extended support for non-English users">
<link href="ch-nexttime.en.html#s-dependencybasedboot" rel="section" title="15.2 Faster booting: Dependency based boot sequence">
<link href="ch-nexttime.en.html#s-di" rel="section" title="15.3 Improvements in the Debian Installer">
<link href="ch-nexttime.en.html#s-morearches" rel="section" title="15.4 More architectures">
<link href="ch-nexttime.en.html#s-morekernels" rel="section" title="15.5 More kernels">
<link href="ch-faqinfo.en.html#s-authors" rel="section" title="16.1 Authors">
<link href="ch-faqinfo.en.html#s-feedback" rel="section" title="16.2 Feedback">
<link href="ch-faqinfo.en.html#s-latest" rel="section" title="16.3 Availability">
<link href="ch-faqinfo.en.html#s-docformat" rel="section" title="16.4 Document format">
<link href="ch-choosing.en.html#s3.1.1" rel="subsection" title="3.1.1 You asked me to install stable, but in stable so and so hardware is not detected/working. What should I do?">
<link href="ch-choosing.en.html#s3.1.2" rel="subsection" title="3.1.2 Will there be different different versions of packages in different distributions?">
<link href="ch-choosing.en.html#s3.1.3" rel="subsection" title="3.1.3 The stable distributions really contains outdated packages. Just look at Kde, Gnome, Xorg or even the kernel. They are very old. Why is it so?">
<link href="ch-choosing.en.html#s3.1.4" rel="subsection" title="3.1.4 If I were to decide to change to another distribution, Can I do that?">
<link href="ch-choosing.en.html#s3.1.5" rel="subsection" title="3.1.5 Could you tell me whether to install testing or unstable?">
<link href="ch-choosing.en.html#s3.1.6" rel="subsection" title="3.1.6 You are talking about testing being broken. What do you mean by that?">
<link href="ch-choosing.en.html#s3.1.7" rel="subsection" title="3.1.7 Why is it that testing could be broken for months? Wont the fixes introduced in unstable flow directly down into testing?">
<link href="ch-choosing.en.html#s3.1.8" rel="subsection" title="3.1.8 From an administrator's point of view, Which distribution requires more attention?">
<link href="ch-choosing.en.html#s3.1.9" rel="subsection" title="3.1.9 What happens when a new release is made?">
<link href="ch-choosing.en.html#s3.1.10" rel="subsection" title="3.1.10 I have a working Desktop/cluster with Debian installed. How do I know which distribution I am running?">
<link href="ch-choosing.en.html#s3.1.11" rel="subsection" title="3.1.11 I am currently tracking stable. Can I change to testing or unstable? If so, How?">
<link href="ch-choosing.en.html#s3.1.12" rel="subsection" title="3.1.12 I am currently tracking testing (lenny). What will happen when a release is made? Will I still be tracking testing or will my machine be running the new stable distribution?">
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<link href="ch-choosing.en.html#s3.2.1" rel="subsection" title="3.2.1 I know that Knoppix/Linex/Ubuntu/... is Debian-based. So after installing it on the hard disk, can I use 'apt' package tools on it?">
<link href="ch-choosing.en.html#s3.2.2" rel="subsection" title="3.2.2 I installed Knoppix/Linex/Ubuntu/... on my hard disk. Now I have a problem. What should I do?">
<link href="ch-choosing.en.html#s3.2.3" rel="subsection" title="3.2.3 I'm using Knoppix/Linex/Ubuntu/... and now I want to use Debian. How do I migrate?">
<link href="ch-ftparchives.en.html#s-oldcodenames" rel="subsection" title="6.2.1 Which other codenames have been used in the past?">
<link href="ch-ftparchives.en.html#s-sourceforcodenames" rel="subsection" title="6.2.2 Where do these codenames come from?">
<link href="ch-ftparchives.en.html#s-frozen" rel="subsection" title="6.5.1 What about "testing"? How is it `frozen'?">
<link href="ch-pkgtools.en.html#s-dpkg" rel="subsection" title="8.1.1 dpkg">
<link href="ch-pkgtools.en.html#s-apt-get" rel="subsection" title="8.1.2 APT">
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<link href="ch-pkgtools.en.html#s-dpkg-extra" rel="subsection" title="8.1.6 Other package management tools">
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<link href="ch-pkgtools.en.html#s-dpkg-deb" rel="subsection" title="8.1.6.2 dpkg-deb">
<link href="ch-pkgtools.en.html#s-dpkg-split" rel="subsection" title="8.1.6.3 dpkg-split">
<link href="ch-uptodate.en.html#s-aptitude-upgrade" rel="subsection" title="9.1.1 aptitude">
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<link href="ch-uptodate.en.html#s-update_aptitude" rel="subsection" title="9.1.3 aptitude">
<link href="ch-uptodate.en.html#s-mirror" rel="subsection" title="9.1.4 mirror">
<link href="ch-uptodate.en.html#s-dpkg-mountable" rel="subsection" title="9.1.5 dpkg-mountable">
<link href="ch-support.en.html#s12.2.1" rel="subsection" title="12.2.1 Mailing lists">
<link href="ch-support.en.html#s-mailinglistconduct" rel="subsection" title="12.2.1.1 What is the code of conduct for the mailing lists?">
<link href="ch-support.en.html#s12.2.2" rel="subsection" title="12.2.2 Web forums">
<link href="ch-support.en.html#s12.2.3" rel="subsection" title="12.2.3 Wiki">
<link href="ch-support.en.html#s12.2.4" rel="subsection" title="12.2.4 Maintainers">
<link href="ch-support.en.html#s12.2.5" rel="subsection" title="12.2.5 Usenet newsgroups">
<link href="ch-contributing.en.html#s-SPI" rel="subsection" title="13.3.1 Software in the Public Interest">
<link href="ch-contributing.en.html#s-FSF" rel="subsection" title="13.3.2 Free Software Foundation">
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<p><a name="ch-basic_defs"></a></p>
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<hr>
<h1>
The Debian GNU/Linux FAQ
<br>Chapter 1 - Definitions and overview
</h1>
<hr>
<h2><a name="s-whatisfaq"></a>1.1 What is this FAQ?</h2>
<p>
This document gives frequently asked questions (with their answers!) about the
Debian distribution (Debian GNU/Linux and others) and about the Debian project.
If applicable, pointers to other documentation will be given: we won't quote
large parts of external documentation in this document. You'll find out that
some answers assume some knowledge of Unix-like operating systems. We'll try
to assume as little prior knowledge as possible: answers to general beginners
questions will be kept simple.
</p>
<p>
If you can't find what you're looking for in this FAQ, be sure to check out <a
href="ch-support.en.html#s-debiandocs">What other documentation exists on and
for a Debian system?, Section 12.1</a>. If even that doesn't help, refer to <a
href="ch-faqinfo.en.html#s-feedback">Feedback, Section 16.2</a>.
</p>
<hr>
<h2><a name="s-whatisdebian"></a>1.2 What is Debian GNU/Linux?</h2>
<p>
Debian GNU/Linux is a particular <em>distribution</em> of the Linux operating
system, and numerous packages that run on it.
</p>
<p>
Debian GNU/Linux is:
</p>
<ul>
<li>
<p>
<strong>full featured</strong>: Debian includes more than 18200 software
packages at present. Users can select which packages to install; Debian
provides a tool for this purpose. You can find a list and descriptions of the
packages currently available in Debian at any of the Debian <code><a
href="http://www.debian.org/distrib/ftplist">mirror sites</a></code>.
</p>
</li>
</ul>
<ul>
<li>
<p>
<strong>free to use and redistribute</strong>: There is no consortium
membership or payment required to participate in its distribution and
development. All packages that are formally part of Debian GNU/Linux are free
to redistribute, usually under terms specified by the GNU General Public
License.
</p>
<p>
The Debian FTP archives also carry approximately 560 software packages (in the
<samp>non-free</samp> and <samp>contrib</samp> sections), which are
distributable under specific terms included with each package.
</p>
</li>
</ul>
<ul>
<li>
<p>
<strong>dynamic</strong>: With about 1060 volunteers constantly contributing
new and improved code, Debian is evolving rapidly. The FTP archives are
updated twice every day.
</p>
</li>
</ul>
<p>
Most Linux users run a specific <em>distribution</em> of Linux, like Debian
GNU/Linux. However, in principle, users could obtain the Linux kernel via the
Internet or from elsewhere, and compile it themselves. They could then obtain
source code for many applications in the same way, compile the programs, then
install them into their systems. For complicated programs, this process can be
not only time-consuming but error-prone. To avoid it, users often choose to
obtain the operating system and the application packages from one of the Linux
distributors. What distinguishes the various Linux distributors are the
software, protocols, and practices they use for packaging, installing, and
tracking applications packages on users' systems, combined with installation
and maintenance tools, documentation, and other services.
</p>
<p>
Debian GNU/Linux is the result of a volunteer effort to create a free,
high-quality Unix-compatible operating system, complete with a suite of
applications. The idea of a free Unix-like system originates from the GNU
project, and many of the applications that make Debian GNU/Linux so useful were
developed by the GNU project.
</p>
<p>
For Debian, free has the GNUish meaning (see the <code><a
href="http://www.debian.org/social_contract#guidelines">Debian Free Software
Guidelines</a></code>). When we speak of free software, we are referring to
freedom, not price. Free software means that you have the freedom to
distribute copies of free software, that you receive source code or can get it
if you want it, that you can change the software or use pieces of it in new
free programs; and that you know you can do these things.
</p>
<p>
The Debian Project was created by Ian Murdock in 1993, initially under the
sponsorship of the Free Software Foundation's GNU project. Today, Debian's
developers think of it as a direct descendent of the GNU project.
</p>
<p>
Although Debian GNU/Linux itself is free software, it is a base upon which
value-added Linux distributions can be built. By providing a reliable,
full-featured base system, Debian provides Linux users with increased
compatibility, and allows Linux distribution creators to eliminate duplication
of effort and focus on the things that make their distribution special. See <a
href="ch-redistrib.en.html#s-childistro">I am making a special Linux
distribution for a "vertical market". Can I use Debian GNU/Linux for
the guts of a Linux system and add my own applications on top of it?, Section
14.3</a> for more information.
</p>
<hr>
<h2><a name="s-linux"></a>1.3 OK, now I know what Debian is... what is Linux?!</h2>
<p>
In short, Linux is the kernel of a Unix-like operating system. It was
originally designed for 386 (and better) PCs; today Linux also runs on a dozen
of other systems. Linux is written by Linus Torvalds and many computer
scientists around the world.
</p>
<p>
Besides its kernel, a "Linux" system usually has:
</p>
<ul>
<li>
<p>
a file system that follows the Linux Filesystem Hierarchy Standard <code><a
href="http://www.pathname.com/fhs/">http://www.pathname.com/fhs/</a></code>.
</p>
</li>
</ul>
<ul>
<li>
<p>
a wide range of Unix utilities, many of which have been developed by the GNU
project and the Free Software Foundation.
</p>
</li>
</ul>
<p>
The combination of the Linux kernel, the file system, the GNU and FSF
utilities, and the other utilities are designed to achieve compliance with the
POSIX (IEEE 1003.1) standard; see <a href="ch-compat.en.html#s-otherunices">How
source code compatible is Debian with other Unix systems?, Section 4.3</a>.
</p>
<p>
For more information about Linux, see <code><a
href="http://www.linux.org/info/">What is Linux</a></code> by <code><a
href="http://www.linux.org/">Linux Online</a></code>.
</p>
<hr>
<h2><a name="s-non-linux"></a>1.4 Does Debian just do GNU/Linux?</h2>
<p>
Currently, Debian is only available for Linux, but with Debian GNU/Hurd and
Debian on BSD kernels, we have started to offer non-Linux-based OSes as a
development, server and desktop platform, too. However, these non-linux ports
are not officially released yet.
</p>
<p>
The oldest porting effort is Debian GNU/Hurd.
</p>
<p>
The Hurd is a set of servers running on top of the GNU Mach microkernel.
Together they build the base for the GNU operating system.
</p>
<p>
Please see <code><a
href="http://www.gnu.org/software/hurd/">http://www.gnu.org/software/hurd/</a></code>
for more information about the GNU/Hurd in general, and <code><a
href="http://www.debian.org/ports/hurd/">http://www.debian.org/ports/hurd/</a></code>
for more information about Debian GNU/Hurd.
</p>
<p>
A second effort is the port to a BSD kernel. People are working with both the
NetBSD and the FreeBSD kernels.
</p>
<p>
See <code><a
href="http://www.debian.org/ports/#nonlinux">http://www.debian.org/ports/#nonlinux</a></code>
for more information about these non-linux ports.
</p>
<hr>
<h2><a name="s-difference"></a>1.5 What is the difference between Debian GNU/Linux and other Linux distributions? Why should I choose Debian over some other distribution?</h2>
<p>
These key features distinguish Debian from other Linux distributions:
</p>
<dl>
<dt>Freedom:</dt>
<dd>
<p>
As stated in the <code><a href="http://www.debian.org/social_contract">Debian
Social Contract</a></code>, Debian will remain 100% free. Debian is very
strict about shipping truly free software. The guidelines used to determine if
a work is "free" are provided in <code><a
href="http://www.debian.org/social_contract#guidelines">The Debian Free
Software</a></code>.
</p>
</dd>
</dl>
<dl>
<dt>The Debian package maintenance system:</dt>
<dd>
<p>
The entire system, or any individual component of it, can be upgraded in place
without reformatting, without losing custom configuration files, and (in most
cases) without rebooting the system. Most Linux distributions available today
have some kind of package maintenance system; the Debian package maintenance
system is unique and particularly robust (see <a
href="ch-pkg_basics.en.html">Basics of the Debian package management system,
Chapter 7</a>).
</p>
</dd>
</dl>
<dl>
<dt>Open development:</dt>
<dd>
<p>
Whereas other Linux distributions are developed by individuals, small, closed
groups, or commercial vendors, Debian is the only major Linux distribution that
is being developed cooperatively by many individuals through the Internet, in
the same spirit as Linux and other free software.
</p>
<p>
More than 1060 volunteer package maintainers are working on over 18200 packages
and improving Debian GNU/Linux. The Debian developers contribute to the
project not by writing new applications (in most cases), but by packaging
existing software according to the standards of the project, by communicating
bug reports to upstream developers, and by providing user support. See also
additional information on how to become a contributor in <a
href="ch-contributing.en.html#s-contrib">How can I become a Debian software
developer?, Section 13.1</a>.
</p>
</dd>
</dl>
<dl>
<dt>The Universal Operating System:</dt>
<dd>
<p>
Debian comes with <code><a href="http://packages.debian.org/stable/">more than
18200 packages</a></code> and runs on <code><a
href="http://www.debian.org/ports/">11 architectures</a></code>. This is far
more than is available for any other GNU/Linux distribution. See <a
href="ch-software.en.html#s-apps">What types of applications and development
software are available for Debian GNU/Linux?, Section 5.1</a> for an overview
of the provided software and see <a href="ch-compat.en.html#s-arches">On what
hardware architectures/systems does Debian GNU/Linux run?, Section 4.1</a> for
a description of the supported hardware platforms.
</p>
</dd>
</dl>
<dl>
<dt>The Bug Tracking System:</dt>
<dd>
<p>
The geographical dispersion of the Debian developers required sophisticated
tools and quick communication of bugs and bug-fixes to accelerate the
development of the system. Users are encouraged to send bugs in a formal
style, which are quickly accessible by WWW archives or via e-mail. See
additional information in this FAQ on the management of the bug log in <a
href="ch-support.en.html#s-buglogs">Are there logs of known bugs?, Section
12.4</a>.
</p>
</dd>
</dl>
<dl>
<dt>The Debian Policy:</dt>
<dd>
<p>
Debian has an extensive specification of our standards of quality, the Debian
Policy. This document defines the qualities and standards to which we hold
Debian packages.
</p>
</dd>
</dl>
<p>
For additional information about this, please see our web page about <code><a
href="http://www.debian.org/intro/why_debian">reasons to choose
Debian</a></code>.
</p>
<hr>
<h2><a name="s-gnu"></a>1.6 How does the Debian project fit in or compare with the Free Software Foundation's GNU project?</h2>
<p>
The Debian system builds on the ideals of free software first championed by the
<code><a href="http://www.gnu.org/">Free Software Foundation</a></code> and in
particular by <code><a href="http://www.stallman.org/">Richard
Stallman</a></code>. FSF's powerful system development tools, utilities, and
applications are also a key part of the Debian system.
</p>
<p>
The Debian Project is a separate entity from the FSF, however we communicate
regularly and cooperate on various projects. The FSF explicitly requested that
we call our system "Debian GNU/Linux", and we are happy to comply
with that request.
</p>
<p>
The FSF's long-standing objective is to develop a new operating system called
GNU, based on <code><a
href="http://www.gnu.org/software/hurd/">Hurd</a></code>. Debian is working
with FSF on this system, called <code><a
href="http://www.debian.org/ports/hurd/">Debian GNU/Hurd</a></code>.
</p>
<hr>
<h2><a name="s-pronunciation"></a>1.7 How does one pronounce Debian and what does this word mean?</h2>
<p>
The project name is pronounced Deb'-ee-en, with a short e in Deb, and emphasis
on the first syllable. This word is a contraction of the names of Debra and
Ian Murdock, who founded the project. (Dictionaries seem to offer some
ambiguity in the pronunciation of Ian (!), but Ian prefers ee'-en.)
</p>
<hr>
<p>
[ <a href="index.en.html">previous</a> ]
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[ 1 ]
[ <a href="ch-getting.en.html">2</a> ]
[ <a href="ch-choosing.en.html">3</a> ]
[ <a href="ch-compat.en.html">4</a> ]
[ <a href="ch-software.en.html">5</a> ]
[ <a href="ch-ftparchives.en.html">6</a> ]
[ <a href="ch-pkg_basics.en.html">7</a> ]
[ <a href="ch-pkgtools.en.html">8</a> ]
[ <a href="ch-uptodate.en.html">9</a> ]
[ <a href="ch-kernel.en.html">10</a> ]
[ <a href="ch-customizing.en.html">11</a> ]
[ <a href="ch-support.en.html">12</a> ]
[ <a href="ch-contributing.en.html">13</a> ]
[ <a href="ch-redistrib.en.html">14</a> ]
[ <a href="ch-nexttime.en.html">15</a> ]
[ <a href="ch-faqinfo.en.html">16</a> ]
[ <a href="ch-getting.en.html">next</a> ]
</p>
<hr>
<p>
The Debian GNU/Linux FAQ
</p>
<address>
version 4.0.3, 6 August 2008<br>
<br>
Authors are listed at <a href="ch-faqinfo.en.html#s-authors">Debian FAQ Authors</a><br>
<br>
</address>
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