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• the standard C library (glibc), which contains basic functions such as ones to open files or network connections, and others facilitating interactions with the kernel; • graphical toolkits, Gtk+ and Qt, allowing many programs to reuse the graphical objects they provide; • the libpng library, that allows loading, interpreting and saving images in the PNG format. Thanks to those libraries, applications can reuse existing code. Their development is thus correspondingly simplified, in particular when many applications reuse the same functions. Since libraries are often developed by different persons, the global development of the system is closer to Unix's historical philosophy. CULTURE The Unix Way: one thing at a time One of the fundamental concepts that underlies the Unix family of operating systems is that each tool should only do one thing, and do it well; applications can then reuse these tools to build more advanced logic on top. This Way can be seen in many incarnations. Shell scripts may be the best example: they assemble complex sequences of very simple tools (such as grep, wc, sort, uniq and so on). Another implementation of this philosophy can be seen in code libraries: the libpng library allows reading and writing PNG images, with different options and in different ways, but it does only that; no question of including functions that display or edit images. Moreover, these libraries are often referred to as “shared libraries”, since the kernel is able to only load them into memory once, even if several processes use the same library at the same time. This allows saving memory, when compared with the opposite (hypothetical) situation where the code for a library would be loaded as many times as there are processes using it. 450 The Debian Administrator's Handbook
Index _ .d, 110 .desktop, 357 .htaccess, 272 /boot/grub/menu.lst, 166 /etc/apt/apt.conf.d/, 110 /etc/apt/preferences, 111 /etc/apt/sources.list, 102 /etc/bind/named.conf, 241 /etc/default/nfs-common, 277 /etc/default/nfs-kernel-server, 277 /etc/default/ntpdate, 169 /etc/exports, 278 /etc/fstab, 171 /etc/group, 157 /etc/hosts, 152, 153 /etc/init.d/rcS, 184 /etc/init.d/rcS.d/, 184 /etc/menu-methods/, 357 /etc/pam.d/common-account, 292 /etc/pam.d/common-auth, 292 /etc/pam.d/common-password, 292 /etc/passwd, 154 /etc/samba/smbpasswd, 281 /etc/shadow, 155 /etc/sudoers, 170 /etc/timezone, 168 /proc/, 152 /sys/, 152 /usr/share/doc/, 11 /usr/share/menu/, 357 /usr/share/zoneinfo/, 168 /var/lib/dpkg/, 84 ~, 159 1000BASE-T, 147 100BASE-T, 147 10BASE-T, 147 10GBASE-T, 147 32/64 bits, choice, 53 64Studio, 18 A A, DNS record, 240 AAAA, DNS record, 240 account administrator account, 58, 170 creation, 157 disable, 156 AC<strong>PI</strong>, 218 acpid, 218 activity, history, 384 activity, monitoring, 383 add a user to a group, 158 adduser, 157 administration, interfaces, 198 ADSL, modem, 150 Advanced Configuration and Power Interface, 218 Advanced Package Tool, 102 Advanced Power Management, 218 Afterstep, 356 Agnula, 18 AH, protocol, 231 aide (Debian package), 386 AIM, 366 Akkerman, Wichert, 12 alias, 255 virtual domain, 255 alien, 98 alioth, 18 Allow from, Apache directive, 273 AllowOverride, Apache directive, 271, 272
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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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TIP Comments in /etc/apt/ preferenc
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6.4. Frontends: aptitude, synaptic
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like aptitude has always done. It c
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aptitude's log will only contain a
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“Authentication” tab in the Sei
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compiled by the package maintainers
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Figure 6.3 Upgrading with update-ma
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IN PRACTICE The Falcot Corp case Fa
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purpose is editing. Browsing this c
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Chapter Solving Problems and Findin
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Man pages not only document program
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The navigation controls in the docu
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constraints... 7.2. Common Procedur
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7.2.3. Asking for Help on a Mailing
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Keywords Configuration Localization
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This chapter reviews everything inc
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The questions are relevant to the p
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to 1 Gb/s). The most widely used ca
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A connection by telephone modem req
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Network Manager knows how to handle
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TIP Bypassing DNS Since application
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8.4.3. Modifying an Existing Accoun
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The creation of an account populate
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8.7. Printer Configuration Printer
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Configuration of the bootloader mus
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oot=/dev/sda # the partition that c
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kernel /vmlinuz root=/dev/sda2 init
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The timezone, configured during ini
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GOING FURTHER GPS modules and other
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A complete list of known filesystem
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8.10.1. Introduction and Prerequisi
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the choices saved in the .config fi
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$ ls ../*.deb ../linux-image-2.6.32
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This requires, however, that lilo b
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Chapter Unix Services 9 Contents Sy
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• checking the integrity of files
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By default, Debian uses four differ
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BACK TO BASICS Client, server A sys
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that requires frequent connections
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For any connection established on t
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When the VNC session is closed, rem
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There are two ways of presenting ri
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Webmin is used through a web interf
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• news: Usenet subsystem message
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9.6. The inetd Super-Server Inetd (
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SECURITY Restricting cron or atd Yo
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# Restart the IRC proxy after each
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update the quotas in the absence of
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of backups can be kept in a small a
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The Falcot Corp administrators are
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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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Page 437 and 438: Chapter Creating a Debian15 Package
Page 439 and 440: editor shows us that dch really did
Page 441 and 442: 15.2. Building your First Package 1
Page 443 and 444: particular case, library, is useful
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Page 447 and 448: ALTERNATIVE apt-ftparchive If mini-
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Page 453 and 454: not yet gone through the new mainta
Page 455 and 456: Chapter Debian's16 Conclusion: Futu
Page 457: 16.3. Future of this Book We would
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Page 462 and 463: A.7. Damn Small Linux This distribu
Page 464 and 465: $ pwd /home/rhertzog $ cd Desktop $
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Page 468 and 469: B.3.1. The Deepest Layer: the Hardw
Page 470 and 471: B.4. Some Tasks Handled by the Kern
Page 472 and 473: B.4.3. Shared Functions Since a num
Page 474 and 475: comes back when the execution of th
Page 478 and 479: alternative, 356 am-utils, 173 aman
Page 480 and 481: Collins, Ben, 12 command line inter
Page 482 and 483: edquota, 209 eGroupware, 366 EHLO,
Page 484 and 485: in-addr.arpa, 241 Includes, Apache
Page 486 and 487: lspci, 444 lspcmcia, 444 lsusb, 444
Page 488 and 489: hardware acceleration, 190 openswan
Page 490 and 491: ead, right, 196 README.Debian, 11,
Page 492 and 493: suite, office, 368 super-server, 20
Page 494: Z Zabbix, 343 Zacchiroli, Stefano,
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