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oot=/dev/sda # the partition that contains Debian root=/dev/sda2 # the item to be loaded by default default=Linux # the most recent kernel image image=/vmlinuz label=Linux initrd=/initrd.img read-only # Old kernel (if the newly installed kernel doesn't boot) image=/vmlinuz.old label=LinuxOLD initrd=/initrd.img.old read-only optional # only for Linux/Windows dual boot other=/dev/sda1 label=Windows Example 8.3 LILO configuration file 8.8.3. GRUB 2 Configuration GRUB (GRand Unified Bootloader) is more recent. It is not necessary to invoke it after each update of the kernel; GRUB knows how to read the filesystems and find the position of the kernel on the disk by itself. To install it on the MBR of the first disk, simply type grub-install /dev/ sda. NOTE GRUB and GRUB 2 Squeeze contains both GRUB version 2 and version 1 (also called “GRUB Legacy”). The grub package installs version 2 (through the package dependency system), and offers automatic migration during upgrades from Lenny. GRUB 1 is still available in the package grub-legacy. NOTE Disk names for GRUB GRUB can only identify hard drives based on information provided by the BIOS. (hd0) corresponds to the first disk thus detected, (hd1) the second, etc. In most cases, this order corresponds exactly to the usual order of disks under Linux, but problems can occur when you associate SCSI and IDE disks. GRUB 164 The Debian Administrator's Handbook
stores correspondences that it detects in the file /boot/grub/device.map. If you find errors there (because you know that your BIOS detects drives in a different order), correct them manually and run grub-install again. Partitions also have a specific name in GRUB. When you use “classical” partitions in MS-DOS format, the first partition on the first disk is labeled, (hd0,msdos1), the second (hd0,msdos2), etc. GRUB 2 configuration is stored in /boot/grub/grub.cfg, but this file (in Debian) is generated from others. Be careful not to modify it by hand, since such local modifications will be lost the next time update-grub is run (which may occur upon update of various packages). The most common modifications of the /boot/grub/grub.cfg file (to add command line parameters to the kernel or change the duration that the menu is displayed, for example) are made through the variables in /etc/default/grub. To add entries to the menu, you can either create a /boot/grub/custom.cfg file or modify the /etc/grub.d/50_custom file. For more complex configurations, you can modify other files in /etc/grub.d, or add to them; these scripts should return configuration snippets, possibly by making use of external programs. These scripts are the ones that will update the list of kernels to boot: 10_linux takes into consideration the installed Linux kernels; 20_linux takes into account Xen virtual systems, and 30_os-prober lists other operating systems (Windows, Mac OSX, Hurd). 8.8.4. GRUB Legacy Configuration Version 1 of GRUB can also read filesystems. It is installed using the grub-install /dev/sda command. NOTE Disk names for GRUB Legacy GRUB Legacy uses the same system for naming disks as GRUB 2, and the same /boot/grub/device.map file. On the other hand, it names partitions a lile differently: the first partition on the first disk is labeled (hd0,0), the second (hd0,1), etc. GRUB's configuration is in the /boot/grub/menu.lst file (see example). # Boot automatically after 30 seconds timeout 30 # Boot first entry by default default 0 # If that fails, try the second fallback 1 # Last kernel installed title GNU/Linux root (hd0,1) Chapter 8 — Basic Configuration: Network, Accounts, Printing… 165
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The Debian Administrator's Handbook
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3.1.3 Integration with Other Linux/
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6.5 Checking Package Authenticity .
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9.4.1 Administrating On a Web Inter
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11.5 Seing Up Windows Shares with S
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14.2 Firewall or Packet Filtering .
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B.2.2 The User's Home Directory . .
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Foreword Linux has been garnering s
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Book Structure Following the struct
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While we were obviously satisfied w
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Tobias Gruetzmacher, Tournier Simon
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Keywords Objective Means Operation
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1.1. What Is Debian? CULTURE Origin
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TOOL Installer debian-installer is
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COMMUNITY Upstream author, or Debia
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➨ http://www.opensource.org/licen
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1.3.1. The Debian Developers Debian
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with the changelog.gz file (or equi
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were only lile challenges at the be
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can always fine-tune these paramete
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PERSPECTIVE Debian for multimedia A
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Each specific service has its own s
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tool. Whether used in graphical or
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Figure 1.2 Compilation of a package
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their work. The next step is the in
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28 The Debian Administrator's Handb
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Keywords Falcot Corp SMB Strong Gro
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We have envisioned this case study
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Several factors have dictated this
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• A survey of several French serv
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Chapter Analyzing the Existing Setu
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Figure 3.1 Coexistence of Debian wi
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Figure 3.2 Database backups Each se
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HARDWARE Next-generation PC Most re
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Keywords Installation Partitioning
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BACK TO BASICS A catch-up course in
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copy the previously downloaded ISO
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of the two, and GRUB, a more modern
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Figure 4.3 Selecting the country 4.
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4.2.9. Configuring the Clock If the
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(swap) will be stored. This task is
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Figure 4.9 Guided partitioning The
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IN PRACTICE Shrinking a Windows par
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“Create a volume group”, to whi
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Figure 4.12 Selecting a Debian mirr
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accessible from the boot menu. You
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TIP Debian thinks of speakers of no
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Chapter Packaging System: Tools and
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Chapter 7, Solving Problems and Fin
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SHA1: 350a8a7a43fe182d54f3b7d73b803
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5.2.1.2. Conflicts: the Conflicts f
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Figure 5.1 Use of a Provides field
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name. This directory also includes
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postinst and similar scripts. But t
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-----BEGIN PGP SIGNED MESSAGE-----
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and a set of upstream patches contr
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Updating database of manual pages .
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which the file comes; --status pack
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Iceweasel is a redesign of the Mozi
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handles other packaging formats, es
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Chapter Maintenance and Updates: Th
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The syntax of the last field depend
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6.1.1.2. The Backports From backpor
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6.2.1. Initialization For any work
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6.2.3. System Upgrade Regular upgra
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it can be configured through severa
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Page 141 and 142: 6.4. Frontends: aptitude, synaptic
Page 143 and 144: like aptitude has always done. It c
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Page 147 and 148: “Authentication” tab in the Sei
Page 149 and 150: compiled by the package maintainers
Page 151 and 152: Figure 6.3 Upgrading with update-ma
Page 153 and 154: IN PRACTICE The Falcot Corp case Fa
Page 155 and 156: purpose is editing. Browsing this c
Page 157 and 158: Chapter Solving Problems and Findin
Page 159 and 160: Man pages not only document program
Page 161 and 162: The navigation controls in the docu
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Page 165 and 166: 7.2.3. Asking for Help on a Mailing
Page 168 and 169: Keywords Configuration Localization
Page 170 and 171: This chapter reviews everything inc
Page 172 and 173: The questions are relevant to the p
Page 174 and 175: to 1 Gb/s). The most widely used ca
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Page 178 and 179: Network Manager knows how to handle
Page 180 and 181: TIP Bypassing DNS Since application
Page 182 and 183: 8.4.3. Modifying an Existing Accoun
Page 184 and 185: The creation of an account populate
Page 186 and 187: 8.7. Printer Configuration Printer
Page 188 and 189: Configuration of the bootloader mus
Page 192 and 193: kernel /vmlinuz root=/dev/sda2 init
Page 194 and 195: The timezone, configured during ini
Page 196 and 197: GOING FURTHER GPS modules and other
Page 198 and 199: A complete list of known filesystem
Page 200 and 201: 8.10.1. Introduction and Prerequisi
Page 202 and 203: the choices saved in the .config fi
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Page 206: This requires, however, that lilo b
Page 209 and 210: Chapter Unix Services 9 Contents Sy
Page 211 and 212: • checking the integrity of files
Page 213 and 214: By default, Debian uses four differ
Page 215 and 216: BACK TO BASICS Client, server A sys
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Page 219 and 220: For any connection established on t
Page 221 and 222: When the VNC session is closed, rem
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Page 225 and 226: Webmin is used through a web interf
Page 227 and 228: • news: Usenet subsystem message
Page 229 and 230: 9.6. The inetd Super-Server Inetd (
Page 231 and 232: SECURITY Restricting cron or atd Yo
Page 233 and 234: # Restart the IRC proxy after each
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Page 237 and 238: of backups can be kept in a small a
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• ACTION: the action correspondin
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ATTRS{rev}==" " ATTRS{state}=="runn
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ATTENTION Graphics card and standby
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Chapter Network10 Infrastructure Co
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sent through to the masqueraded con
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CULTURE SSL and TLS The SSL protoco
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crt for the public certificate, key
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10.2.1.2. Configuring the OpenVPN S
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fast. Installing an IKE daemon (for
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pptpd is the PPTP server for Linux.
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## some defaults nodefaultroute pro
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GOING FURTHER Optimal configuration
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# (/proc/sys/net/ipv6/conf/all/acce
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so that a security vulnerability in
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Example 10.12 Excerpt of /etc/bind/
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} option broadcast-address 192.168.
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10.8.2. Remote Diagnosis: nmap nmap
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The packet currently displayed was
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Chapter 11 Network Services: Postfi
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the ISP's SMTP server, which is alw
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alias_database = hash:/etc/aliases
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virtual_mailbox_base = /var/mail/vh
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The last two rules reject any messa
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The reject_unlisted_recipient rule
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failed messages later), especially
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# Unfiltered addresses postmaster@f
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Note that the SASL database was cre
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Apache is a modular server, and man
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# New log format including (virtual
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11.2.3.2. Restricting Access The Al
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➨ http://www.falcot.com/cgi-bin/a
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RPC services register to a director
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option, which disables this behavio
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The package also proposes identifyi
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1 5 Specifies the character set and
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username = user password = password
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11.6.3. Configuring a Filter squid
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objectClass: dcObject objectClass:
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Question Answer LDAP server Uniform
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and so on). The answer to the “co
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go into deeper detail for some conc
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Chapter Advanced12 Administration C
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CULTURE Independent or inexpensive?
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RAID-5 RAID-5 addresses the asymmet
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Filesystem label= OS type: Linux Bl
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there will be a synchronization pha
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[...] Update Time : Thu Sep 30 15:5
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Fortunately, these lines can be gen
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# pvdisplay "/dev/sdb2" is a new ph
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Allocation inherit Read ahead secto
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# cat /etc/fstab [...] /dev/vg_crit
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[...] # df -h /srv/base/ Filesystem
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• The remaining partitions, sda7
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that gets started) is known as dom0
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or Mandriva). Other methods include
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# xm list Name ID Mem VCPUs State T
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known as control groups, by which d
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into a separate switch, with the co
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done. INIT: Entering runlevel: 3 St
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12.2.3.2. Network Configuration Jus
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is accessible from all interfaces;
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We will only give a rough overview
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• from the network; preseeding th
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12.3.3. Simple-CDD: The All-In-One
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12.4. Monitoring Monitoring is a ge
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Finally, when a plugin is invoked w
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According to its type, each object
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check_command } define service{ use
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Keywords Workstation Graphical desk
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13.1. Configuring the X11 Server Th
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oth versions are available in Squee
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contains commented examples. Last,
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Figure 13.2 The KDE desktop Since t
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Evolution is the GNOME email client
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Strictly speaking, Debian Squeeze c
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The next versions of these applicat
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13.4.4.3. Collaborative Work With F
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The Windows partition must first be
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Chapter Security14 Contents Definin
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ut the other elements should also b
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• INPUT: concerns packets whose d
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Other actions, particularly those c
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Figure 14.2 Fwbuilder's main window
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• those that qualify a message as
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14.3.3.1. Auditing Packages: debsum
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The chkrootkit and rkhunter package
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Figure 14.3 Security contexts and U
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The aptitude install selinux-basics
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# semanage login -a -s user_u rhert
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# myapp executable will have: # lab
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GOING FURTHER The m4 macro language
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Message avc:denied { read write } p
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➨ http://en.wikipedia.org/wiki/SQ
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features imply a increased risk of
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confronted with these unfortunate c
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sure of actually fixing it; otherwi
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(...) ** 2004-11-29-19:50:49: DCC S
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Chapter Creating a Debian15 Package
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editor shows us that dch really did
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15.2. Building your First Package 1
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particular case, library, is useful
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The interpretation of such a rule i
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ALTERNATIVE apt-ftparchive If mini-
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a huge problem as soon as the error
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EXTRA Lightweight process for “De
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not yet gone through the new mainta
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Chapter Debian's16 Conclusion: Futu
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16.3. Future of this Book We would
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These objectives necessarily involv
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A.7. Damn Small Linux This distribu
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$ pwd /home/rhertzog $ cd Desktop $
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tmpfs 514208 269136 245072 53% /dev
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B.3.1. The Deepest Layer: the Hardw
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B.4. Some Tasks Handled by the Kern
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B.4.3. Shared Functions Since a num
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comes back when the execution of th
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• the standard C library (glibc),
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alternative, 356 am-utils, 173 aman
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Collins, Ben, 12 command line inter
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edquota, 209 eGroupware, 366 EHLO,
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in-addr.arpa, 241 Includes, Apache
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lspci, 444 lspcmcia, 444 lsusb, 444
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hardware acceleration, 190 openswan
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ead, right, 196 README.Debian, 11,
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suite, office, 368 super-server, 20
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Z Zabbix, 343 Zacchiroli, Stefano,
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