[ previous ] [ Contents ] [ 1 ] [ 2 ] [ 3 ] [ 4 ] [ 5 ] [ 6 ] [ 7 ] [ 8 ] [ 9 ] [ 10 ] [ 11 ] [ 12 ] [ next ]

Installing Debian GNU/Linux 3.0 For Alpha
Chapter 3 - Before Installing Debian GNU/Linux

3.1 Overview of the Installation Process

Here's a road map for the steps you will take during the installation process.

  1. Create partition-able space for Debian on your hard disk
  1. Locate and/or download kernel and driver files (except Debian CD users)
  1. Set up boot floppies or place boot files (except most Debian CD users can boot from one of the CDs)
  1. Boot the installation system
  1. Configure the keyboard
  1. Create and mount Debian partitions
  1. Point the installer to the location of the kernel and drivers
  1. Select which peripheral drivers to load
  1. Configure the network interface
  1. Initiate automatic download/install/setup of the base system
  1. Configure Linux or multi-system boot loading
  1. Boot the newly installed system and do some final configuration
  1. Install additional tasks and packages, at your discretion

3.2 Back Up Your Existing Data!

Before you start, make sure to back up every file that is now on your system. If this is the first time a non-native operating system has been installed on your computer, it's quite likely you will need to re-partition your disk to make room for Debian GNU/Linux. Anytime you partition your disk, you should count on losing everything on the disk, no matter what program you use to do it. The programs used in installation are quite reliable and most have seen years of use; but they are also quite powerful and a false move can cost you. Even after backing up be careful and think about your answers and actions. Two minutes of thinking can save hours of unnecessary work.

If you are creating a multi-boot system, make sure that you have the distribution media of any other present operating systems on hand. Especially if you repartition your boot drive, you might find that you have to reinstall your operating system's boot loader, or in many cases the whole operating system itself and all files on the affected partitions.

3.3 Information You Will Need

3.3.1 Documentation Installation Manual

This file you are now reading, in plain ASCII, HTML or PDF format. Dselect for Beginners

Tutorial for using the dselect program. This is one means of installing additional packages onto your system after the basic install is complete. Partitioning Program Manual Pages

Manual pages for the partitioning software used during the installation process. MD5 checksums

List of MD5 checksums for the binary files. If you have the md5sum program, you can ensure that your files are not corrupt by running md5sum -v -c md5sum.txt.

3.3.2 Finding Sources of Hardware Information

Hardware information can be gathered from:

                  Hardware Information Needed for an Install              
     |Hardware|                Information You Might Need                |
     |        |  * How many you have.                                    |
     |        |  * Their order on the system.                            |
     |Hard    |  * Whether IDE or SCSI (most computers are IDE).         |
     |Drives  |  * Available free space.                                 |
     |        |  * Partitions.                                           |
     |        |  * Partitions where other operating systems are          |
     |        |    installed.                                            |
     |        |  * Model and manufacturer.                               |
     |        |  * Resolutions supported.                                |
     |Monitor |  * Horizontal refresh rate.                              |
     |        |  * Vertical refresh rate.                                |
     |        |  * Color depth (number of colors) supported.             |
     |        |  * Screen size.                                          |
     |        |  * Type: serial, PS, or USB.                             |
     |Mouse   |  * Port.                                                 |
     |        |  * Manufacturer.                                         |
     |        |  * Number of buttons.                                    |
     |Network |  * Model and manufacturer.                               |
     |        |  * Type of adapter.                                      |
     |Printer |  * Model and manufacturer.                               |
     |        |  * Printing resolutions supported.                       |
     |        |  * Model and manufacturer.                               |
     |Video   |  * Video RAM available.                                  |
     |Card    |  * Resolutions and color depths supported (these should  |
     |        |    be checked against your monitor's capabilities).      |

3.3.3 Hardware Compatibility

Many brand name products work without trouble on Linux. Moreover, hardware for Linux is improving daily. However, Linux still does not run as many different types of hardware as some operating systems.

You can check hardware compatibility by:

3.3.4 Network Settings

If your computer is connected to a network 24 hours a day (i.e., an Ethernet or equivalent connection — not a PPP connection), you should ask your network's system administrator for this information.

If your computer's only network connection is via a serial line, using PPP or an equivalent dialup connection, you will not be able to install the base system over the network. To install the system in this case, you must use a CD, pre-load the base packages on an existing hard disk partition, or prepare floppy disks containing the base packages. See Setting Up PPP, Section 8.9 below for information on setting up PPP under Debian once the system is installed.

3.4 Planning Use of the System

It is important to decide what type of machine you are creating. This will determine the disk space requirements for your Debian system.

3.5 Meeting Minimum Hardware Requirements

Once you have gathered information about your computer's hardware, check that your hardware will let you do the type of installation that you want to do.

Depending on your needs, you might manage with less than some of the recommended hardware listed in the table below. However, most users risk being frustrated if they ignore these suggestions.

              Recommended Minimum System Requirements         
           |Install Type|      RAM     | Hard Drive   |
           |No desktop  | 16 megabytes | 450 megabytes|
           |With Desktop| 64 megabytes | 1 gigabyte   |
           |Server      | 128 megabytes| 4 gigabytes  |

Here is a sampling of some common Debian system configurations. You can also get an idea of the disk space used by related groups of programs by referring to Disk Space Needed for Tasks, Section 11.4.

Standard Server
This is a small server profile, useful for a stripped down server which does not have a lot of niceties for shell users. It includes an FTP server, a web server, DNS, NIS, and POP. For these 50MB of disk space would suffice, and then you would need to add space for any data you serve up.
A standard desktop box, including the X window system, graphics applications, sound, editors, etc. Size of the packages will be around 500MB.
Work Console
A more stripped-down user machine, without the X window system or X applications. Possibly suitable for a laptop or mobile computer. The size is around 140MB.
A desktop setup with all the development packages, such as Perl, C, C++, etc. Size is around 475MB. Assuming you are adding X11 and some additional packages for other uses, you should plan around 800MB for this type of machine.

Remember that these sizes don't include all the other materials which are usually to be found, such as user files, mail, and data. It is always best to be generous when considering the space for your own files and data. Notably, the Debian /var partition contains a lot of state information. The dpkg files (with information on all installed packages) can easily consume 20MB; with logs and the rest, you should usually allocate at least 50MB for /var.

3.6 Pre-Partitioning for Multi-Boot Systems

Partitioning your disk simply refers to the act of breaking up your disk into sections. Each section is then independent of the others. It's roughly equivalent to putting up walls in a house; if you add furniture to one room it doesn't affect any other room.

If you already have an operating system on your system (Tru64 (Digital UNIX), OpenVMS, Windows NT, FreeBSD, …) and want to stick Linux on the same disk, you will need to repartition the disk. Debian requires its own hard disk partitions. It cannot be installed on Windows or MacOS partitions. It may be able to share some partitions with other Linux systems, but that's not covered here. At the very least you will need a dedicated partition for the Debian root.

You can find information about your current partition setup by using a partitioning tool for your current operating system . Partitioning tools always provide a way to show existing partitions without making changes.

In general, changing a partition with a file system already on it will destroy any information there. Thus you should always make backups before doing any repartitioning. Using the analogy of the house, you would probably want to move all the furniture out of the way before moving a wall or you risk destroying it.

If your computer has more than one hard disk, you may want to dedicate one of the hard disks completely to Debian. If so, you don't need to partition that disk before booting the installation system; the installer's included partitioning program can handle the job nicely.

If your machine has only one hard disk, and you would like to completely replace the current operating system with Debian GNU/Linux, you also can wait to partition as part of the installation process (Partitioning for Debian, Chapter 6), after you have booted the installation system. However this only works if you plan to boot the installer system from floppies, CD-ROM or files on a connected machine. Consider: if you boot from files placed on the hard disk, and then partition that same hard disk within the installation system, thus erasing the boot files, you'd better hope the installation is successful the first time around. At the least in this case, you should have some alternate means of reviving your machine like the original system's installation floppies or CDs.

If your machine already has multiple partitions, and enough space can be provided by deleting and replacing one or more of them, then you too can wait and use the Debian installer's partitioning program. You should still read through the material below, because there may be special circumstances like the order of the existing partitions within the partition map, that force you to partition before installing anyway.

In all other cases, you'll need to partition your hard disk before starting the installation to create partition-able space for Debian. If some of the partitions will be owned by other operating systems, you should create those partitions using native operating system partitioning programs. We recommend that you do not attempt to create Debian Linux partitions using another operating system's tools. Instead, you should just create the native operating system's partitions you will want to retain.

If you are going to install more than one operating system on the same machine, you should install all other system(s) before proceeding with Linux installation. Windows and other OS installations may destroy your ability to start Linux, or encourage you to reformat non-native partitions.

You can recover from these actions or avoid them, but installing the native system first saves you trouble.

If you currently have one hard disk with one partition (a common setup for desktop computers), and you want to multi-boot the native operating system and Debian, you will need to:

  1. Back up everything on the computer.
  1. Boot from the native operating system installer media such as CD-ROM or floppies.
  1. Use the native partitioning tools to create native system partition(s). Leave either a place holder partition or free space for Debian GNU/Linux.
  1. Install the native operating system on its new partition.
  1. Boot back into the native system to verify everything's OK, and to download the Debian installer boot files.
  1. Boot the Debian installer to continue installing Debian.

3.6.1 Partitioning in Tru64 UNIX

Tru64 UNIX, formerly known as Digital UNIX, which is in turn formerly known as OSF/1, uses the partitioning scheme similar to the BSD `disk label', which allows for up to eight partitions per disk drive. The partitions are numbered `1' through to `8' in Linux and ``lettered'' `a' through to `h' in UNIX. Linux kernels 2.2 and higher always correspond `1' to `a', `2' to `b' and so on. For example, rz0e in Tru64 UNIX would most likely be called sda5 in Linux.

Partitions in the disk label may overlap. Moreover, the `c' partition is required to span the entire disk (thus overlapping all other non-empty partitions). Under Linux this makes sda3 identical to sda (sdb3 to sdb, if present, and so on). Apart from satisfying this requirement, you should carefully avoid creating overlapping partitions.

Another conventional requirement is for the `a' partition to start from the beginning of the disk, so that it always includes the boot block with the disk label. If you intend to boot Debian from that disk, you need to size it at least 2MB to fit aboot and perhaps a kernel.

Note that these two partitions are only required for compatibility; you must not put a file system onto them, or you'll destroy data. If you're not going to share the disk with Tru64 Unix or one of the free 4.4BSD-Lite derived operating systems (FreeBSD, OpenBSD, or NetBSD), you can ignore these requirements, and use the partitioning tool from the Debian boot disks. See Debian Partitioning Programs, Section 6.5 for details.

Disks can be partitioned with the graphical disk configuration tool that is accessible through the Application Manager, or with the command-line disklabel utility. Partition type for the Linux file system should be set to `resrvd8'. This can only be done via disklabel; however, all other configuration can easily be performed with the graphical tool.

It is possible, and indeed quite reasonable, to share a swap partition between UNIX and Linux. In this case it will be needed to do a mkswap on that partition every time the system is rebooted from UNIX into Linux, as UNIX will damage the swap signature. You may want to run mkswap from the Linux start-up scripts before adding swap space with swapon -a.

If you want to mount UNIX partitions under Linux, note that Digital UNIX can use two different file system types, UFS and AdvFS, of which Linux only understands the former.

3.6.2 Partitioning in Windows NT

Windows NT uses the PC-style partition table. If you are manipulating existing FAT or NTFS partitions, it is recommended that you use the native Windows NT tools (or, more conveniently, you can also repartition your disk from the AlphaBIOS setup menu). Otherwise, it is not really necessary to partition from Windows; the Linux partitioning tools will generally do a better job. Note that when you run NT, the Disk Administrator may offer you to write a ``harmless signature'' on non-Windows disks if you have any. Never let it do that, as this signature will destroy the partition information.

If you plan to boot Linux from an ARC/AlphaBIOS/ARCSBIOS console, you will need a (small) FAT partition for MILO. 5 Mb is quite sufficient. If Windows NT is installed, its 6 Mb bootstrap partition can be employed for this purpose.

3.7 Installing Debian GNU/Linux from a Unix/Linux System

This section explains how to install Debian GNU/Linux from an existing Unix or Linux system, without using the ncurses-based, menu-driven installer as explained in the rest of the manual. This "cross-install" HOWTO has been requested by users switching to Debian GNU/Linux from Redhat, Mandrake, and SUSE. In this section some familiarity with entering *nix commands and navigating the file system is assumed. In this section, $ symbolizes a command to be entered in the user's current system, while # refers to a command entered in the Debian chroot.

Once you've got the new Debian system configured to your preference, you can migrate your existing user data (if any) to it, and keep on rolling. This is therefore a "zero downtime" Debian GNU/Linux install. It's also a clever way for dealing with hardware that otherwise doesn't play friendly with various boot or installation media.

3.7.1 Getting Started

With your current *nix partitioning tools, repartition the hard drive as needed, creating at least one filesystem plus swap. You need at least 150MB of space available for a console only install, or at least 300MB if you plan to install X.

To create file systems on your partitions. For example, to create an ext3 file system on partition /dev/hda6 (that's our example root partition):

      $ mke2fs -j /dev/hda6

To create an ext2 file system instead, omit -j.

Initialize and activate swap (substitute the partition number for your intended Debian swap partition):

      $ mkswap /dev/hda5
      $ sync; sync; sync
      $ swapon /dev/hda5

Mount one partition as /mnt/debinst (the installation point, to be the root (/) filesystem on your new system). The mount point name is strictly arbitrary, it is referenced later below.

      $ mkdir /mnt/debinst
      $ mount /dev/hda6 /mnt/debinst

3.7.2 Install debootstrap

The tool that the Debian installer uses, which is recognized as the official way to install a Debian base system, is debootstrap. It uses wget, but otherwise depends only on glibc. Install wget if it isn't already on your current system, then download and install debootstrap.

If you have an rpm-based system, you can use alien to convert the .deb into .rpm, or download an rpm-ized version at http://people.debian.org/~blade/install/debootstrap

Or, you can use the following procedure to install it manually. Make a work folder for extracting the .deb into:

      $ mkdir work
      $ cd work

The debootstrap binary is located in the Debian archive (be sure to select the proper file for your architecture). Download the debootstrap .deb from the pool, copy the package to the work folder, and extract the binary files from it. You will need to have root privileges to install the binaries.

      $ ar -xf debootstrap_0.X.X_arch.deb
      $ cd /
      $ zcat < /full-path-to-work/work/data.tar.gz | tar xv

The current version of debootstrap, at least for i386, has been compiled with glibc 2.3. Therefore if you are upgrading from Redhat 6.0, you will need to obtain the source files and re-compile.

3.7.3 Run debootstrap (Network-connected)

debootstrap can download the needed files directly from the archive when you run it. You can substitute any Debian archive mirror for http.us.debian.org/debian in the command example below, preferably a mirror close to you network-wise. Mirrors are listed at http://www.debian.org/misc/README.mirrors.

When running debootstrap, the PATH needs to include /usr/sbin and /sbin for subsidiary program calls.

If you have a woody version Debian GNU/Linux CD mounted at /cdrom, you could substitute a file URL instead of the http URL: file:/cdrom/debian/

Substitute one of the following for ARCH in the debootstrap command: alpha, arm, hppa, i386, ia64, m68k, mips, mipsel, powerpc, s390, or sparc.

      $ /usr/sbin/debootstrap --arch ARCH woody \
          /mnt/debinst http://http.us.debian.org/debian

3.7.4 Run debootstrap (Using basedebs.tar)

debootstrap can use the basedebs.tar file, if you have already downloaded it ahead of time. The basedebs.tar file is generated only every once in a while, so you'll get the latest version of the base system by pointing debootstrap directly to a Debian archive as shown in the previous section.

The basedebs.tar file is found in the base-images-current directory of the Debian archive for your architecture, for example: http://http.us.debian.org/debian/dists/woody/main/disks-i386/base-images-current/basedebs.tar

Substitute one of the following for ARCH in the debootstrap command: alpha, arm, hppa, i386, ia64, m68k, mips, mipsel, powerpc, s390, or sparc.

     $ /usr/sbin/debootstrap --arch ARCH --unpack-tarball \
         /path-to-downloaded/basedebs.tar woody /mnt/debinst

3.7.5 Configure The Base System

Now you've got a real Debian system, though rather lean, on disk. Chroot into it:

      $ chroot /mnt/debinst /bin/bash Mount Partitions

You need to create /etc/fstab.

      # editor /etc/fstab

Here is a sample you can modify to suit:

     # /etc/fstab: static file system information.
     # file system    mount point   type    options                  dump pass
     /dev/XXX         /             ext2    defaults                 0    0
     /dev/XXX         /boot         ext2    ro,nosuid,nodev          0    2
     /dev/XXX         none          swap    sw                       0    0
     proc             /proc         proc    defaults                 0    0
     /dev/fd0         /mnt/floppy   auto    noauto,rw,sync,user,exec 0    0
     /dev/cdrom       /mnt/cdrom    iso9660 noauto,ro,user,exec      0    0
     /dev/XXX         /tmp          ext2    rw,nosuid,nodev          0    2
     /dev/XXX         /var          ext2    rw,nosuid,nodev          0    2
     /dev/XXX         /usr          ext2    rw,nodev                 0    2
     /dev/XXX         /home         ext2    rw,nosuid,nodev          0    2

Use mount -a to mount all the file systems you have specified in your /etc/fstab, or to mount file systems individually use:

      # mount /path  # e.g.:  mount /usr

You can mount the proc file system multiple times and to arbitrary locations, though /proc is customary. If you didn't use mount -a, be sure to mount proc before continuing:

      # mount -t proc proc /proc

A RedHat user reports that for his system, this should instead be

      # mount -t proc none /proc Configure Keyboard

To configure your keyboard:

      # dpkg-reconfigure console-data Configure Networking

To configure networking, edit /etc/network/interfaces, /etc/resolv.conf, and etc/hostname.

      # editor /etc/network/interfaces

Here are some simple examples from /usr/share/doc/ifupdown/examples:

     # /etc/network/interfaces -- configuration file for ifup(8), ifdown(8)
     # See the interfaces(5) manpage for information on what options are 
     # available.
     # We always want the loopback interface.
     auto lo
     iface lo inet loopback
     # To use dhcp:
     # auto eth0
     # iface eth0 inet dhcp
     # An example static IP setup: (broadcast and gateway are optional)
     # auto eth0
     # iface eth0 inet static
     #     address
     #     network
     #     netmask
     #     broadcast
     #     gateway

Enter your nameserver(s) and search directives in /etc/resolv.conf:

      # editor /etc/resolv.conf

A simple /etc/resolv.conf:

     # search hqdom.local\000
     # nameserver
     # nameserver

Enter your system's host name (2 to 63 characters):

      # echo DebianHostName > /etc/hostname

If you have multiple network cards, you should arrange the names of driver modules in the /etc/modules file into the desired order. Then during boot, each card will be associated with the interface name (eth0, eth1, etc.) that you expect. Configure Timezone, Users, and APT

Set your timezone, add a normal user, and choose your apt sources by running

      # /usr/sbin/base-config Configure Locales

To configure your locale settings to use a language other than English, install the locales support package and configure it:

      # apt-get install locales
      # dpkg-reconfigure locales

NOTE: Apt must be configured before, ie. during the base-config phase. Before using locales with character sets other than ASCII or latin1, please consult the appropriate localisation HOWTO.

3.7.6 Install a Kernel

If you intend to boot this system, you probably want a Linux kernel and a boot loader. Identify available pre-packaged kernels with

      # apt-cache search kernel-image

Then install your choice using its package name.

      # apt-get install kernel-image-2.X.X-arch-etc

3.7.7 Set up the Boot Loader

To make your Debian GNU/Linux system bootable, set up your boot loader to load the installed kernel with your new root partition.

3.8 Pre-Installation Hardware and Operating System Setup

This section will walk you through pre-installation hardware setup, if any, that you will need to do prior to installing Debian. Generally, this involves checking and possibly changing firmware settings for your system. The ``firmware'' is the core software used by the hardware; it is most critically invoked during the bootstrap process (after power-up). Known hardware issues affecting the reliability of Debian GNU/Linux on your system are also highlighted.

3.8.1 Hardware Issues to Watch Out For

Many people have tried operating their 90 MHz CPU at 100 MHz, etc. It sometimes works, but is sensitive to temperature and other factors and can actually damage your system. One of the authors of this document over-clocked his own system for a year, and then the system started aborting the gcc program with an unexpected signal while it was compiling the operating system kernel. Turning the CPU speed back down to its rated value solved the problem.

The gcc compiler is often the first thing to die from bad memory modules (or other hardware problems that change data unpredictably) because it builds huge data structures that it traverses repeatedly. An error in these data structures will cause it to execute an illegal instruction or access a non-existent address. The symptom of this will be gcc dying from an unexpected signal.

[ previous ] [ Contents ] [ 1 ] [ 2 ] [ 3 ] [ 4 ] [ 5 ] [ 6 ] [ 7 ] [ 8 ] [ 9 ] [ 10 ] [ 11 ] [ 12 ] [ next ]

Installing Debian GNU/Linux 3.0 For Alpha

version 3.0.24, 18 December, 2002

Bruce Perens
Sven Rudolph
Igor Grobman
James Treacy
Adam Di Carlo