Hi, I've updated the section in the installation guide about configuring apt to describe that it is now possible to scan multiple CDs. I'd welcome comments on the new text before I commit the changes. A diff of en/using-d-i/modules/apt-setup.xml is attached. The new text can be previewed at: http://people.debian.org/~fjp/tmp/d-i/ch06s03.html. Cheers, FJP
Index: en/using-d-i/modules/apt-setup.xml =================================================================== --- en/using-d-i/modules/apt-setup.xml (revision 51611) +++ en/using-d-i/modules/apt-setup.xml (working copy) @@ -54,14 +54,68 @@ </para> + <sect4 id="apt-setup-cdset"> + <title>Installing from more than one CD or DVD</title> + +<para> + +If you are installing from a full CD or a DVD that is part of a larger +set, the installer will ask if you want to scan additional CDs or DVDs. +If you have additional CDs or DVDs available, you probably want to do +this so the installer can use the packages included on them. + +</para><para> + +If you do not have any additional CDs or DVDs, that is no problem: using +them is not required. If you also do not use a network mirror (as explained +in the next section), it can mean that not all packages belonging to the +tasks you select in the next step of the installation can be installed. + +</para> +<note><para> + +Packages are included on CDs in the order of their popularity. This means +that for most uses only the first CDs in a set are needed and that only +very few people actually use any of the packages included on the last CDs +in a set. + +</para><para> + +It also means that buying or downloading and burning a full CD set is just +a waste of money as you'll never use most of them. In most cases you are +better of getting only the first 3 to 8 CDs and installing any additional +packages you may need from the Internet by using a mirror. +The same goes for DVD sets: the first DVD, or maybe the first two DVDs +will cover most needs. + +</para><para> + +A good rule of thumb is that for a regular desktop installation (using the +GNOME desktop environment) only the first three CDs are needed. For the +alternative desktop environments (KDE or Xfce), additional CDs are needed. +The first DVD easily covers all three desktop environments. + +</para></note> +<para> + +If you do scan multiple CDs or DVDs, the installer will prompt you to +exchange them when it needs packages from another CD/DVD than the one +currently in the drive. Note that only CDs or DVDs that belong to the +same set should be scanned. The order in which they are scanned does not +really matter, but scanning them in ascending order will reduce the chance +of mistakes. + +</para> + </sect4> + <sect4 id="apt-setup-mirror"> <title>Using a network mirror</title> <para> -One question that will be asked in most cases is whether or not to use a -network mirror as a source for packages. In most cases the default answer -should be fine, but there are some exceptions. +One question that will be asked during most installs is whether or not to +use a network mirror as a source for packages. In most cases the default +answer should be fine, but there are some exceptions. </para><para> @@ -74,17 +128,10 @@ </para><para> -If you are installing from a full CD or using a CD image (not DVD), using a -network mirror is not required, but is still strongly recommended because a -single CD contains only a fairly limited number of packages. The installer -currently does not support using multiple CD or DVD images during the -installation<footnote> - -<para> -Adding that option is planned. -</para> - -</footnote>. If you have a limited Internet connection it may still be best +If you are installing from a full CD or using a full CD image (not DVD), +using a network mirror is not required, but is still strongly recommended +because a single CD contains only a fairly limited number of packages. +If you have a limited Internet connection it may still be best to <emphasis>not</emphasis> select a network mirror here, but to finish the installation using only what's available on the CD and install additional packages after the installation (i.e. after you have rebooted into the new @@ -92,64 +139,53 @@ </para><para> -If you are installing from a DVD or using a DVD image, the need to use a -network mirror is a lot smaller, but there is still a chance that some -packages that are part of the tasks you select in the next step will not -be included on the first DVD. This is especially true if you are installing -in another language than English: a number of font and localization packages -are known to be on the second DVD. So, if you have a reasonable Internet -connection it is still advisable to use a network mirror. +If you are installing from a DVD or using a DVD image, any packages needed +during the installation should be present on the first DVD. The same is true +if you have scanned multiple CDs as explained in the previous section. Use +of a network mirror is optional. One advantage of adding a network mirror is +that it will make updates of packages in point releases of the distribution +available for installation. </para><para> -<!-- This should probably be documented a bit more extensively in - post-install instead. --> -To install additional packages after the installation you have two options: +In summary: selecting a network mirror is generally a good idea, except +if you do not have a good Internet connection. If the current version of +a package is available on the CD/DVD, the installer will always use that. +The amount of data that will be downloaded if you do select a mirror thus +depends on <orderedlist> <listitem><para> -if you have additional CD/DVD images available (from same set as the -installation CD/DVD you are using), you can add those to the -<filename>sources.list</filename> using <command>apt-cdrom</command>; +the tasks you select in the next step of the installation, </para></listitem> <listitem><para> -manually add a mirror to the <filename>sources.list</filename> using an -editor. +which packages are needed for those tasks, </para></listitem> -</orderedlist> +<listitem><para> + +which of those packages are present on the CDs or DVDs you have scanned, and -You can then use one of the package management front-ends to select and -install additional packages<footnote> +</para></listitem> +<listitem><para> -<para> -It is possible to add both additional CDs or DVDs <emphasis>and</emphasis> -a network mirror in <filename>/etc/apt/sources.list</filename>. Also adding -a network mirror has the advantage that it will make updates of packages in -point releases of the distribution available for installation. -</para> +whether any updated versions of packages included on the CDs or DVDs are +available from a mirror (either a regular package mirror, or a mirror for +security or volatile updates). -</footnote>. +</para></listitem> +</orderedlist> </para><para> -In summary: selecting a network mirror is generally a good idea, except -if you do not have a good Internet connection. If the current version of -a package is available on the CD/DVD, the installer will always use that. -The amount of data that will be downloaded if you do select a mirror thus -depends on a) the tasks you select in the next step of the installation, b) -which packages are needed for those tasks, and c) which of those packages -are present on the CD/DVD. +Note that the last point means that, even if you choose not to use a network +mirror, some packages may still be downloaded from the Internet if there is a +security or volatile update available for them and those services have been +configured. -</para><para> - -Note that even if you choose not to use a network mirror, some packages -may still be downloaded from the Internet if there is a security or -volatile update available for them and those services have been configured. - </para> </sect4> </sect3>
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