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Figure 1.2 Compilation of a package by the autobuilders QUICK LOOK buildd, the Debian package recompiler buildd is the abbreviation of “build daemon”. This program automatically recompiles new versions of Debian packages on the architectures on which it is hosted (cross-compiling not always being sufficient) . Thus, to produce binaries for the sparc architecture, the project has sparc machines available (specifically, Sun brand). The program buildd runs on them continuously to create package binaries for sparc from source packages sent by Debian developers. This soware is used on all the computers serving autobuilders for Debian. By extension, the term buildd frequently is used to refer to these machines, which are generally reserved solely for this purpose. 1.5.3. Migration to Testing A bit later, the package will have matured; compiled on all the architectures, it will not have undergone recent modifications. It is then a candidate for inclusion in the Testing distribution — a group of Unstable packages chosen according to some quantifiable criteria. Every day a program automatically selects the packages to include in Testing, according to elements guaranteeing a certain level of quality: 1. lack of critical bugs, or, at least fewer than the version currently included in Testing; 24 The Debian Administrator's Handbook
2. at least 10 days spent in Unstable, which is sufficient time to find and report any serious problems; 3. successful compilation on all officially supported architectures; 4. dependencies that can be satisfied in Testing, or that can at least be moved there together with the package in question. This system is clearly not infallible; critical bugs are regularly found in packages included in Testing. Still, it is generally effective, and Testing poses far fewer problems than Unstable, being for many, a good compromise between stability and novelty. NOTE Limitations of Testing Very interesting in principle, Testing poses some practical problems: the tangle of cross-dependencies between packages is such that a package can never move there completely on its own. With packages all depending upon each other, it is necessary to move a large number simultaneously, which is impossible when some are uploading updates regularly. On the other hand, the script identifying the families of related packages works hard to create them (this would be an NP-complete problem, for which, fortunately, we know some good heuristics). This is why we can manually interact with and guide this script by suggesting groups of packages, or imposing the inclusion of certain packages in a group, even if this temporarily breaks some dependencies. This functionality is accessible to the Release Managers and their assistants. Recall that an NP-complete problem is of an exponential algorithmic complexity according to the size of the data, here being the length of the code (the number of figures) and the elements involved. The only way to resolve it is frequently to examine all possible configurations, which could require enormous means. A heuristic is an approximate, but satisfying, solution. COMMUNITY The Release Manager Release Manager is an important title, associated with heavy responsibilities. The bearer of this title must, in effect, manage the release of a new, stable version of Debian, and define the process for development of Testing until it meets the quality criteria for Stable. They also define a tentative schedule (not always followed). We also have Stable Release Managers, oen abbreviated SRM, who manage and select updates for the current stable version of Debian. They systematically include security patches and examine all other proposals for inclusion, on a case by case basis, sent by Debian developers eager to update their package in the stable version. 1.5.4. The Promotion from Testing to Stable Let us suppose that our package is now included in Testing. While it has room for improvement, the maintainer thereof must continue to improve it and restart the process from Unstable (but its later inclusion in Testing is generally faster: If it has not changed significantly, all of its dependencies are already available). When it reaches perfection, the maintainer has completed Chapter 1 — The Debian Project 25
Page 2 and 3: The Debian Administrator's Handbook
Page 4 and 5: 3.1.3 Integration with Other Linux/
Page 6 and 7: 6.5 Checking Package Authenticity .
Page 8 and 9: 9.4.1 Administrating On a Web Inter
Page 10 and 11: 11.5 Seing Up Windows Shares with S
Page 12 and 13: 14.2 Firewall or Packet Filtering .
Page 14 and 15: B.2.2 The User's Home Directory . .
Page 17 and 18: Foreword Linux has been garnering s
Page 19 and 20: Book Structure Following the struct
Page 21 and 22: While we were obviously satisfied w
Page 23 and 24: Tobias Gruetzmacher, Tournier Simon
Page 26 and 27: Keywords Objective Means Operation
Page 28 and 29: 1.1. What Is Debian? CULTURE Origin
Page 30 and 31: TOOL Installer debian-installer is
Page 32 and 33: COMMUNITY Upstream author, or Debia
Page 34 and 35: ➨ http://www.opensource.org/licen
Page 36 and 37: 1.3.1. The Debian Developers Debian
Page 38 and 39: with the changelog.gz file (or equi
Page 40 and 41: were only lile challenges at the be
Page 42 and 43: can always fine-tune these paramete
Page 44 and 45: PERSPECTIVE Debian for multimedia A
Page 46 and 47: Each specific service has its own s
Page 48 and 49: tool. Whether used in graphical or
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Page 56 and 57: Keywords Falcot Corp SMB Strong Gro
Page 58 and 59: We have envisioned this case study
Page 60 and 61: Several factors have dictated this
Page 62: • A survey of several French serv
Page 65 and 66: Chapter Analyzing the Existing Setu
Page 67 and 68: Figure 3.1 Coexistence of Debian wi
Page 69 and 70: Figure 3.2 Database backups Each se
Page 71 and 72: HARDWARE Next-generation PC Most re
Page 74 and 75: Keywords Installation Partitioning
Page 76 and 77: BACK TO BASICS A catch-up course in
Page 78 and 79: copy the previously downloaded ISO
Page 80 and 81: of the two, and GRUB, a more modern
Page 82 and 83: Figure 4.3 Selecting the country 4.
Page 84 and 85: 4.2.9. Configuring the Clock If the
Page 86 and 87: (swap) will be stored. This task is
Page 88 and 89: Figure 4.9 Guided partitioning The
Page 90 and 91: IN PRACTICE Shrinking a Windows par
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Page 94 and 95: Figure 4.12 Selecting a Debian mirr
Page 96 and 97: accessible from the boot menu. You
Page 98: 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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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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