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diff --git a/includes/etch/install/doc/FAQ/html/ch-customizing.html b/includes/etch/install/doc/FAQ/html/ch-customizing.html index 0185e6c..1cfdfaa 100644..120000 --- a/includes/etch/install/doc/FAQ/html/ch-customizing.html +++ b/includes/etch/install/doc/FAQ/html/ch-customizing.html @@ -1,522 +1 @@ -<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN"> - -<html> - -<head> - -<meta http-equiv="content-type" content="text/html; charset=iso-8859-1"> - -<title>The Debian GNU/Linux FAQ - Customizing your installation of Debian GNU/Linux</title> - -</head> - -<body> - -<p><a name="ch-customizing"></a></p> -<hr> - -<p> -[ <a href="ch-kernel.en.html">previous</a> ] -[ <a href="index.en.html#contents">Contents</a> ] -[ <a href="ch-basic_defs.en.html">1</a> ] -[ <a href="ch-getting.en.html">2</a> ] -[ <a href="ch-compat.en.html">3</a> ] -[ <a href="ch-software.en.html">4</a> ] -[ <a href="ch-ftparchives.en.html">5</a> ] -[ <a href="ch-pkg_basics.en.html">6</a> ] -[ <a href="ch-pkgtools.en.html">7</a> ] -[ <a href="ch-uptodate.en.html">8</a> ] -[ <a href="ch-kernel.en.html">9</a> ] -[ 10 ] -[ <a href="ch-support.en.html">11</a> ] -[ <a href="ch-contributing.en.html">12</a> ] -[ <a href="ch-redistrib.en.html">13</a> ] -[ <a href="ch-nexttime.en.html">14</a> ] -[ <a href="ch-faqinfo.en.html">15</a> ] -[ <a href="ch-support.en.html">next</a> ] -</p> - -<hr> - -<h1> -The Debian GNU/Linux FAQ -<br>Chapter 10 - Customizing your installation of Debian GNU/Linux -</h1> - -<hr> - -<h2><a name="s-papersize"></a>10.1 How can I ensure that all programs use the same paper size?</h2> - -<p> -Install the <code>libpaper1</code> package, and it will ask you for a -system-wide default paper size. This setting will be kept in the file -<samp>/etc/papersize</samp>. -</p> - -<p> -Users can override the paper size setting using the <samp>PAPERSIZE</samp> -environment variable. For details, see the manual page -<code>papersize(5)</code>. -</p> - -<hr> - -<h2><a name="s-hardwareaccess"></a>10.2 How can I provide access to hardware peripherals, without compromising security?</h2> - -<p> -Many device files in the <samp>/dev</samp> directory belong to some predefined -groups. For example, <samp>/dev/fd0</samp> belongs to the <samp>floppy</samp> -group, and <samp>/dev/dsp</samp> belongs to the <samp>audio</samp> group. -</p> - -<p> -If you want a certain user to have access to one of these devices, just add the -user to the group the device belongs to, i.e. do: -</p> - -<pre> - adduser user group -</pre> - -<p> -This way you won't have to change the file permissions on the device. -</p> - -<hr> - -<h2><a name="s-consolefont"></a>10.3 How do I load a console font on startup the Debian way?</h2> - -<p> -The <code>kbd</code> and <code>console-tools</code> packages support this, edit -<samp>/etc/kbd/config</samp> or <samp>/etc/console-tools/config</samp> files. -</p> - -<hr> - -<h2><a name="s-appdefaults"></a>10.4 How can I configure an X11 program's application defaults?</h2> - -<p> -Debian's X programs will install their application resource data in the -<samp>/etc/X11/app-defaults/</samp> directory. If you want to customize X -applications globally, put your customizations in those files. They are marked -as configuration files, so their contents will be preserved during upgrades. -</p> - -<hr> - -<h2><a name="s-booting"></a>10.5 Every distribution seems to have a different boot-up method. Tell me about Debian's.</h2> - -<p> -Like all Unices, Debian boots up by executing the program <samp>init</samp>. -The configuration file for <samp>init</samp> (which is -<samp>/etc/inittab</samp>) specifies that the first script to be executed -should be <samp>/etc/init.d/rcS</samp>. This script runs all of the scripts in -<samp>/etc/rcS.d/</samp> by sourcing or forking subprocess depending on their -file extension to perform initialization such as to check and to mount file -systems, to load modules, to start the network services, to set the clock, and -to perform other initialization. Then, for compatibility, it runs the files -(except those with a `.'in the filename) in <samp>/etc/rc.boot/</samp> too. -Any scripts in the latter directory are usually reserved for system -administrator use, and using them in packages is deprecated. -</p> - -<p> -After completing the boot process, <samp>init</samp> executes all start scripts -in a directory specified by the default runlevel (this runlevel is given by the -entry for <samp>id</samp> in <samp>/etc/inittab</samp>). Like most System V -compatible Unices, Linux has 7 runlevels: -</p> -<ul> -<li> -<p> -0 (halt the system), -</p> -</li> -</ul> -<ul> -<li> -<p> -1 (single-user mode), -</p> -</li> -</ul> -<ul> -<li> -<p> -2 through 5 (various multi-user modes), and -</p> -</li> -</ul> -<ul> -<li> -<p> -6 (reboot the system). -</p> -</li> -</ul> - -<p> -Debian systems come with id=2, which indicates that the default runlevel will -be '2' when the multi-user state is entered, and the scripts in -<samp>/etc/rc2.d/</samp> will be run. -</p> - -<p> -In fact, the scripts in any of the directories, <samp>/etc/rcN.d/</samp> are -just symbolic links back to scripts in <samp>/etc/init.d/</samp>. However, the -<em>names</em> of the files in each of the <samp>/etc/rcN.d/</samp> directories -are selected to indicate the <em>way</em> the scripts in -<samp>/etc/init.d/</samp> will be run. Specifically, before entering any -runlevel, all the scripts beginning with 'K' are run; these scripts kill -services. Then all the scripts beginning with 'S' are run; these scripts start -services. The two-digit number following the 'K' or 'S' indicates the order in -which the script is run. Lower numbered scripts are executed first. -</p> - -<p> -This approach works because the scripts in <samp>/etc/init.d/</samp> all take -an argument which can be either `start', `stop', `reload', `restart' or -`force-reload' and will then do the task indicated by the argument. These -scripts can be used even after a system has been booted, to control various -processes. -</p> - -<p> -For example, with the argument `reload' the command -</p> - -<pre> - /etc/init.d/sendmail reload -</pre> - -<p> -sends the sendmail daemon a signal to reread its configuration file. (BTW, -Debian supplies <code>invoke-rc.d</code> as a wrapper for invoking the scripts -in <samp>/etc/init.d/</samp>.) -</p> - -<hr> - -<h2><a name="s-custombootscripts"></a>10.6 It looks as if Debian does not use <samp>rc.local</samp> to customize the boot process; what facilities are provided?</h2> - -<p> -Suppose a system needs to execute script <samp>foo</samp> on start-up, or on -entry to a particular (System V) runlevel. Then the system administrator -should: -</p> -<ul> -<li> -<p> -Enter the script <samp>foo</samp> into the directory <samp>/etc/init.d/</samp>. -</p> -</li> -</ul> -<ul> -<li> -<p> -Run the Debian command <samp>update-rc.d</samp> with appropriate arguments, to -set up links between the (command-line-specified) directories rc?.d and -<samp>/etc/init.d/foo</samp>. Here, '?' is a number from 0 through 6 and -corresponds to each of the System V runlevels. -</p> -</li> -</ul> -<ul> -<li> -<p> -Reboot the system. -</p> -</li> -</ul> - -<p> -The command <samp>update-rc.d</samp> will set up links between files in the -directories rc?.d and the script in <samp>/etc/init.d/</samp>. Each link will -begin with a 'S' or a 'K', followed by a number, followed by the name of the -script. Scripts beginning with 'S' in <samp>/etc/rcN.d/</samp> are executed -when runlevel <samp>N</samp> is entered. Scripts beginning with a 'K' are -executed when leaving runlevel <samp>N</samp>. -</p> - -<p> -One might, for example, cause the script <samp>foo</samp> to execute at -boot-up, by putting it in <samp>/etc/init.d/</samp> and installing the links -with <samp>update-rc.d foo defaults 19</samp>. The argument 'defaults' refers -to the default runlevels, which are 2 through 5. The argument '19' ensures -that <samp>foo</samp> is called before any scripts containing numbers 20 or -larger. -</p> - -<hr> - -<h2><a name="s-interconffiles"></a>10.7 How does the package management system deal with packages that contain configuration files for other packages?</h2> - -<p> -Some users wish to create, for example, a new server by installing a group of -Debian packages and a locally generated package consisting of configuration -files. This is not generally a good idea, because <code>dpkg</code> will not -know about those configuration files if they are in a different package, and -may write conflicting configurations when one of the initial "group" -of packages is upgraded. -</p> - -<p> -Instead, create a local package that modifies the configuration files of the -"group" of Debian packages of interest. Then <code>dpkg</code> and -the rest of the package management system will see that the files have been -modified by the local "sysadmin" and will not try to overwrite them -when those packages are upgraded. -</p> - -<hr> - -<h2><a name="s-divert"></a>10.8 How do I override a file installed by a package, so that a different version can be used instead?</h2> - -<p> -Suppose a sysadmin or local user wishes to use a program -"login-local" rather than the program "login" provided by -the Debian <code>login</code> package. -</p> - -<p> -Do <strong>not</strong>: -</p> -<ul> -<li> -<p> -Overwrite <samp>/bin/login</samp> with <samp>login-local</samp>. -</p> -</li> -</ul> - -<p> -The package management system will not know about this change, and will simply -overwrite your custom <samp>/bin/login</samp> whenever <samp>login</samp> (or -any package that provides <samp>/bin/login</samp>) is installed or updated. -</p> - -<p> -Rather, do -</p> -<ul> -<li> -<p> -Execute: -</p> - -<pre> - dpkg-divert --divert /bin/login.debian /bin/login -</pre> - -<p> -in order to cause all future installations of the Debian <code>login</code> -package to write the file <samp>/bin/login</samp> to -<samp>/bin/login.debian</samp> instead. -</p> -</li> -</ul> -<ul> -<li> -<p> -Then execute: -</p> - -<pre> - cp login-local /bin/login -</pre> - -<p> -to move your own locally-built program into place. -</p> -</li> -</ul> - -<p> -Details are given in the manual page <code>dpkg-divert(8)</code>. -</p> - -<hr> - -<h2><a name="s-localpackages"></a>10.9 How can I have my locally-built package included in the list of available packages that the package management system knows about?</h2> - -<p> -Execute the command: -</p> - -<pre> - dpkg-scanpackages BIN_DIR OVERRIDE_FILE [PATHPREFIX] > my_Packages -</pre> - -<p> -where: -</p> -<ul> -<li> -<p> -BIN-DIR is a directory where Debian archive files (which usually have an -extension of ".deb") are stored. -</p> -</li> -</ul> -<ul> -<li> -<p> -OVERRIDE_FILE is a file that is edited by the distribution maintainers and is -usually stored on a Debian FTP archive at <samp>indices/override.main.gz</samp> -for the Debian packages in the "main" distribution. You can ignore -this for local packages. -</p> -</li> -</ul> -<ul> -<li> -<p> -PATHPREFIX is an <em>optional</em> string that can be prepended to the -<samp>my_Packages</samp> file being produced. -</p> -</li> -</ul> - -<p> -Once you have built the file <samp>my_Packages</samp>, tell the package -management system about it by using the command: -</p> - -<pre> - dpkg --merge-avail my_Packages -</pre> - -<p> -If you are using APT, you can add the local repository to your -<code>sources.list(5)</code> file, too. -</p> - -<hr> - -<h2><a name="s-diverse"></a>10.10 Some users like mawk, others like gawk; some like vim, others like elvis; some like trn, others like tin; how does Debian support diversity?</h2> - -<p> -There are several cases where two packages provide two different versions of a -program, both of which provide the same core functionality. Users might prefer -one over another out of habit, or because the user interface of one package is -somehow more pleasing than the interface of another. Other users on the same -system might make a different choice. -</p> - -<p> -Debian uses a "virtual" package system to allow system administrators -to choose (or let users choose) their favorite tools when there are two or more -that provide the same basic functionality, yet satisfy package dependency -requirements without specifying a particular package. -</p> - -<p> -For example, there might exist two different versions of newsreaders on a -system. The news server package might 'recommend' that there exist -<em>some</em> news reader on the system, but the choice of <samp>tin</samp> or -<samp>trn</samp> is left up to the individual user. This is satisfied by -having both the <code>tin</code> and <code>trn</code> packages provide the -virtual package <code>news-reader</code>. <em>Which</em> program is invoked is -determined by a link pointing from a file with the virtual package name -<samp>/etc/alternatives/news-reader</samp> to the selected file, e.g., -<samp>/usr/bin/trn</samp>. -</p> - -<p> -A single link is insufficient to support full use of an alternate program; -normally, manual pages, and possibly other supporting files must be selected as -well. The Perl script <samp>update-alternatives</samp> provides a way of -ensuring that all the files associated with a specified package are selected as -a system default. -</p> - -<p> -For example, to check what executables provide `x-window-manager', run: -</p> - -<pre> - update-alternatives --display x-window-manager -</pre> - -<p> -If you want to change it, run: -</p> - -<pre> - update-alternatives --config x-window-manager -</pre> - -<p> -And follow the instructions on the screen (basically, press the number next to -the entry you'd like better). -</p> - -<p> -If a package doesn't register itself as a window manager for some reason (file -a bug if it's in error), or if you use a window manager from /usr/local -directory, the selections on screen won't contain your preferred entry. You -can update the link through command line options, like this: -</p> - -<pre> - update-alternatives --install /usr/bin/x-window-manager \ - x-window-manager /usr/local/bin/wmaker-cvs 50 -</pre> - -<p> -The first argument to `--install' option is the symlink that points to -/etc/alternatives/NAME, where NAME is the second argument. The third argument -is the program to which /etc/alternatives/NAME should point to, and the fourth -argument is the priority (larger value means the alternative will more probably -get picked automatically). -</p> - -<p> -To remove an alternative you added, simply run: -</p> - -<pre> - update-alternatives --remove x-window-manager /usr/local/bin/wmaker-cvs -</pre> - -<hr> - -<p> -[ <a href="ch-kernel.en.html">previous</a> ] -[ <a href="index.en.html#contents">Contents</a> ] -[ <a href="ch-basic_defs.en.html">1</a> ] -[ <a href="ch-getting.en.html">2</a> ] -[ <a href="ch-compat.en.html">3</a> ] -[ <a href="ch-software.en.html">4</a> ] -[ <a href="ch-ftparchives.en.html">5</a> ] -[ <a href="ch-pkg_basics.en.html">6</a> ] -[ <a href="ch-pkgtools.en.html">7</a> ] -[ <a href="ch-uptodate.en.html">8</a> ] -[ <a href="ch-kernel.en.html">9</a> ] -[ 10 ] -[ <a href="ch-support.en.html">11</a> ] -[ <a href="ch-contributing.en.html">12</a> ] -[ <a href="ch-redistrib.en.html">13</a> ] -[ <a href="ch-nexttime.en.html">14</a> ] -[ <a href="ch-faqinfo.en.html">15</a> ] -[ <a href="ch-support.en.html">next</a> ] -</p> - -<hr> - -<p> -The Debian GNU/Linux FAQ -</p> - -<address> -version 3.1.5, 17 January 2007<br> -<br> -Authors are listed at <a href="ch-faqinfo.en.html#s-authors">Debian FAQ Authors</a><br> -<br> -</address> -<hr> - -</body> - -</html> - +ch-customizing.en.html
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