Install Debian Squeeze GNU/Linux

Happy news! On February 6, 2011 the word came down: "After 24 months of constant development, the Debian Project is proud to present its new stable version 6.0 'Squeeze'".

Debian GNU/Linux is the one of the largest and longest-running all-volunteer free software projects in the world. One of the (many) things I like about Debian is how they balance the competing desires of "ooohhh... shiny!" vs stability in Linux by maintaining 3 different releases of the distribution: stable/squeeze, testing/wheezy, and unstable/sid.

For a recent home server setup and laptop installation I chose stable. Bleeding-edge packages are not required and these systems benefit from active security patches and bug fixes while avoiding any potentially disruptive changes in a very solid working environment.

Unstable is the staging ground for changes which - if no serious bugs are unearthed - migrate in short order to testing. Which in turn is destined to be "released when its ready" and become the next version of stable. It is even possible to use backports plus - lightly and with caution - apt-pinning to pull packages from different releases and create the perfect mix (as tailored by you) of stability and freshness.

0. Start

I like to start with a lightweight minimal installation of Debian.

Download one of the many versions of the Debian installation images. In this HOWTO example I select i386 as my target architecture and I use the small businesscard.iso: Torrent | Direct download

Download the MD5SUMS file and confirm the Debian businesscard.iso is a "good" copy by running ...

$ md5sum debian-VERSION-i386-businesscard.iso; cat MD5SUMS | grep businesscard

Ensure the two strings of numbers match before proceeding.

1. Prepare USB stick

USB sticks are my Linux install media of choice because I have configured several devices that do not include an optical drive. Plug the USB stick into your Linux host machine and leave the stick unmounted. Run the dmesg command and note the USB device ID (sdb, sdc, ...).

WARNING! Make sure to record the correct USB device ID. The following procedure wipes out all data on the USB stick. On my system the device shows up as sdb but it will possibly be different on your system.

Copy the iso to the USB stick ...

# cat debian-VERSION-i386-businesscard.iso > /dev/sdX
# sync

2. Install

2.1 BIOS and the Debian installer

Plug the freshly prepared USB stick into the target box. Power up. Either the device is pre-configured in the BIOS to recognize a USB stick as the first choice for boot or hit the device hotkey to enter the boot menu. Select the USB stick and launch the Debian installer ...

Advanced Options -> Expert install

Mostly I stick with the default selections presented by the Debian installer .. with a few exceptions noted below.

2.2 Choose a mirror of the Debian archive

Debian's businesscard installer allows a choice of Debian versions - stable, testing, or unstable ...

Debian version to install:
squeeze - stable

2.3 Partition disks

Creating encrypted partitions with Erase date: yes (default) overwrites the partition with random data and can take many hours depending on partition size.

Select the Manual option to partition the drive. I choose to encrypt my swap and home partitions. Space permitting - my chosen partition layout is ...

sda1 - 20GB - root partition - filesystem: ext4, noatime
sda2 - 1GB - swap partition - filesystem: swap, Encryption key: Random key
sda3 - remaining space - home partition - filesystem: ext4, noatime, reserved blocks: 1%, Encryption key: Passphrase

Placing root on a separate partition allows the flexibility of re-installing the operating system at a later date without overwriting home.

2.4 Install the base system

No need to include every driver under the sun. Just let the system load what is needed ...

Drivers to include in the initrd:
targeted: only include drivers needed for this system

2.5 Configure the package manager

I choose to enable the non-free archive (useful if you require non-free firmware for devices such as wireless chipsets) ...

Use non-free software?

2.6 Software selection

A custom Debian machine starts as a minimal machine. Un-select all the software choices except for the standard system utilities ...

Choose software to install:
[*] Standard system utilities

Finish setting up a lightweight base installation. Reboot ...

3. Configure

3.1 Fix time (if necessary)

tzconfig    # select timezone
date MMDDHHmmCCYY    # change the date and time to local settings
hwclock --utc    # set hardware clock to universal time
hwclock --systohc    # set system time to hardware clock

3.2 Blacklist modules

A system that makes use of encrypted hard drive partitions may notice the following error at boot - modprobe: fatal: error inserting padlock_sha ... no such device.

It is harmless and the crypto-partitions mount as expected. But if you want to remove the error messages - and the affected system does not contain a VIA CPU - then blacklist the padlock_aes and padlock_sha modules by editing /etc/modprobe.d/blacklist.conf (let's also get rid of that "beep beep" pcspeaker as a bonus) ...

# no beep, thanks
blacklist pcspkr

# no VIA CPU no padlock needed foo
blacklist padlock_aes
blacklist padlock_sha

3.3 Console tools

Install ...

# apt-get install anacron colordiff cowsay dosfstools firmware-linux gpm htop input-utils rsync sudo sysv-rc-conf vrms

3.4 Sudo

Allow a user to run commands with root-privileges using sudo. Run the command visudo -s and configure ...

# Allow members of group sudo to execute any command
%sudo   ALL=(ALL:ALL) ALL

# User privilege specification
root    ALL=(ALL:ALL) ALL
# Allow user to run certain commands without prompting for a password
yourusername     ALL=NOPASSWD: /sbin/cryptsetup, /sbin/halt, /sbin/ifconfig

Save changes and add your USERNAME to sudo group ...

# adduser USERNAME sudo

3.5 Wireless

Wifi-equipped machines usually require additional firmware. My Thinkpad X201, for example, requires the firmware-iwlwifi package ...

$ sudo apt-get install wireless-tools
$ sudo apt-get install firmware-PACKAGENAME

Run ifconfig -a and confirm the wireless_interface is detected (usually identified as eth1 or wlan0). For manual setup of a wireless_interface (example: wlan0) connecting to an access point with no encryption ...

$ ifconfig eth0 down
$ iwconfig
$ ifconfig wlan0 up
$ iwlist wlan0 scan | less
$ iwconfig wlan0 essid "ACCESSPOINT"
$ iwconfig wlan0
$ dhclient wlan0

3.6 Backports contains packages from Debian's testing and unstable releases that have been recompiled for stable.

Add the archive to the package manager by generating an entry in /etc/apt/sources.list.d ...

$ sudo echo 'deb squeeze-backports main' > /etc/apt/sources.list.d/squeeze-backports.list
$ sudo apt-get update

Files in sources.list.d must end with a *.list extension.

To verify which versions of a package are available and - for example - to install the version from backports ...

$ apt-cache policy PACKAGE
$ sudo apt-get -t squeeze-backports install PACKAGE

3.7 Multimedia

Add marillat's debian-multimedia archive. Download and install the archive encryption key ...

$ wget -c
$ sudo dpkg -i debian-multimedia-keyring_2010.12.26_all.deb

Generate an entry in /etc/apt/sources.list.d ...

$ sudo echo 'deb squeeze main non-free' > /etc/apt/sources.list.d/debian-multimedia.list
$ sudo apt-get update

3.8 Apt-file

Apt-file is a useful Debian package search tool ...

$ sudo apt-get install apt-file
$ sudo apt-file update

Re-run apt-file update whenever a new package archive is added to sources.list or sources.list.d.

3.9 Kernel

If you are running Debian's i386 target architecture on a machine with 4GB+ of memory download the pae kernel to make use of all that installed RAM ...

$ sudo apt-get remove linux-image-2.6-686
$ sudo apt-get -t squeeze-backports install linux-image-686-pae

... and reboot.

3.10 Sound

$ aptitude show alsa-utils
$ alsamixer
$ aplay /usr/share/sounds/alsa/Front_Center.wav
$ alsactl store

3.11 Xorg

Discover your machine's video card with lspci -v | grep "VGA compatible controller". Using an open-source video driver ...

$ sudo apt-get install xorg

There are known issues with some Intel video cards - xserver-xorg-video-intel - and KMS and the default 2.6.32 kernel in Debian stable.

On my Intel-equipped netbook netbook booting from GRUB or starting an X session can result in a black screen. A temporary fix is to edit the booting GRUB entry and add acpi=off to the kernel line.

A more permanent fix is to configure the backlight setting in /etc/default/grub.

To use the proprietary Nvidia driver see Getting Nvidia and Xorg to play nice ... though I think this information might be out-dated. I no longer use an NVIDIA-equipped machine.

4. Desktop

Select a window manager or a full-blown desktop environment such as XFCE, GNOME or KDE. There are a few choices.

I like XFCE. For a desktop environment complete with file manager, themes, graphical package and network managers ...

$ sudo apt-get install xfce4 gdm gksu libnotify-bin thunar ffmpegthumbnailer catfish synaptic update-notifier xscreensaver
$ sudo apt-get install gtk2-engines gtk2-engines-murrine gnome-colors shiki-colors qt4-qtconfig
$ sudo apt-get install ttf-mscorefonts-installer ttf-bitstream-vera ttf-liberation xfonts-terminus
$ sudo apt-get install network-manager network-manager-gnome

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