root / pykota / trunk / docs / installation.sgml @ 1173

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Better documentation.
1.15 is out !

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1<!-- $Id$ -->
2
3<chapter>
4  <title id="installation">Installation</title>
5 
6  <para>Last modified on $Date$</para>
7 
8  <para>
9    Before being able to use <application>PyKota</application>, you have of course to
10    install it first. But before installing, you must carefully plan your installation.
11  </para>
12 
13  <para>
14    First you have to determine which machine will be the <application>PyKota</application>
15    <firstterm>Storage Server</firstterm>. The Storage Server is the host responsible
16    for keeping a centralized database of print usage for all your printers, users and groups.
17  </para>
18 
19  <para>
20    Then you have to list all the <firstterm>Print Servers</firstterm> for which
21    you plan to use <firstterm>print quota</firstterm> facilities.
22  </para>
23 
24  <para>
25    Finally you have to download <application>PyKota</application>'s latest version
26    or buy an official package, from
27    <ulink url="http://www.librelogiciel.com/software/">http://www.librelogiciel.com/software/</ulink>.
28    If you've just bought an official package, then as soon as you've receive it you
29    have to decompress and visit its archive, to do so just type the following commands :
30    <screen>
31jerome@nordine:~$ tar -zxf pykota-1.15_official.tar.gz   
32jerome@nordine:~$ cd pykota-1.15_official
33jerome@nordine:~/pykota-1.15_official$
34    </screen>
35  </para>
36 
37  <para>
38    You can see many files in this directory, the first ones to read are <filename>README</filename>,
39    then <filename>COPYING</filename> and <filename>LICENSE</filename>. They will give you
40    basic installation instructions and explain the licensing terms under which
41    <application>PyKota</application> is distributed. Of course they are also mostly
42    boring to read ! Detailed installation and operating instructions are defined
43    in the <filename>./docs</filename> directory, in the form of <acronym>SGML</acronym>
44    documentation in the <ulink url="http://www.docbook.org">DocBook</ulink> format.
45    You have to compile these files into readable documentation like the <acronym>HTML</acronym>
46    or <acronym>PDF</acronym> formats, or buy an official <application>PyKota</application> package
47    which already contains these compiled forms of the documentation. Of course you already
48    know this because that's what you are currently reading !
49  </para>
50 
51  <para>
52    Now we will see what has to be done on each of the servers we are planning to use.
53    <note>
54      <title>Note</title>
55      <para>
56        Of course, depending on the size of your network, you may very well
57        use the same machine as both a Print Server and a Storage Server.
58        This is especially the case if you've got only one server.
59      </para>
60    </note> 
61  </para>
62 
63  <sect1>
64    <title>Storage Server Installation</title>
65   
66    <para>
67      Depending on <application>PyKota</application>'s version number, different
68      types of storage backends may be supported, so we will see for each one of
69      them how to configure it.
70    </para>
71   
72    <sect2>
73      <title>PostgreSQL</title>
74     
75      <para>
76        <application>PostgreSQL</application> is an <firstterm>Object Relationnal DataBase
77        Management System</firstterm> distributed under a <firstterm>Free Software</firstterm>
78        license from the
79        <ulink url="http://www.postgresql.org">http://www.postgresql.org</ulink>
80        web site. It certainely is the free <acronym>RDBMS</acronym> which has the most advanced
81        features, and is widely used all over the world.
82      </para>
83     
84      <para>
85        To configure your Storage Server, you must have PostgreSQL already working.
86        The complete installation of <application>PostgreSQL</application> is not covered by
87        the present manual, please refer to your system's documentation or to
88        <ulink url="http://www.postgresql.org">http://www.postgresql.org</ulink> for
89        details.
90      </para>
91     
92      <para>
93        One thing you have to check, though, is that every Print Server on which you
94        want to install the print quota mechanism, must be able to connect to the
95        <application>PostgreSQL</application> server. In the default installation of
96        <application>PostgreSQL</application> this may not be the case for security reasons, except if both
97        servers are in fact the same machine. In any case, it is recommended that you
98        check the <filename>/etc/postgresql/pg_hba.conf</filename> file and modify it if
99        needed. This file is self documented and its modification is straightforward.
100        You also have to make sure that <application>PostgreSQL</application> accepts <acronym>TCP/IP</acronym> connections.
101        To do so you either have to launch it with the <option>-i</option> option or
102        modify the <filename>/etc/postgresql/postgresql.conf</filename> file, which is
103        self documented and easy to modify too. Allowing <acronym>TCP/IP</acronym> connections
104        is not necessary though if your Quota Storage Server and your Print Server are
105        the very same host.
106        <tip>
107          <title>Tip</title>
108          <para>
109            Don't forget to restart <application>PostgreSQL</application> if you modify
110            any of its configuration files, in order for the changes to take effect.
111          </para>
112        </tip> 
113      </para>
114     
115      <para>
116        Be careful, you may be unable to connect from a Print Server to the <application>PostgreSQL</application>
117        server even if the configuration is correct. Sometimes your connections may be blocked by
118        one or more network firewalls along the route from one machine to the other. If this
119        is the case, then the best thing you can do is to ask your <firstterm>Network Administrator</firstterm>
120        to not filter the IP port used by <application>PostgreSQL</application>, which is
121        usually port <literal>5432/tcp</literal>.
122        <note>
123          <title>Note</title>
124          <para>
125            The TCP/IP network port used by PostgreSQL may be different. When in doubt, ask your
126            <firstterm>System Administrator</firstterm> for the correct value.
127          </para>
128        </note> 
129      </para>
130     
131      <para>
132        Now that your <application>PostgreSQL</application> server is up and running, and
133        is waiting for your connections, you have to create the Quota Storage DataBase.
134        To do so, you'll have to feed <application>PostgreSQL</application> with the
135        <filename>pykota-x.xx/initscripts/postgresql/pykota-postgresql.sql</filename> file.
136        This file will create a Quota DataBase administrator in the <application>PostgreSQL</application> system, then create an empty
137        Quota DataBase and set some permissions on it. The Quota DataBase administrator
138        is the <application>PostgreSQL</application>'s user used to manage the Quota database.
139        The Quota DataBase Administrator is not present in the Quota Database
140        itself, he is only defined in <application>PostgreSQL</application> and don't
141        have to exist on any system, nor in the Quota DataBase. His default name
142        is <literal>pykotaadmin</literal>.
143        A Quota Storage read-only user is also created under the name of <literal>pykotauser</literal>.
144        This read-only user is used by <application>PyKota</application> to connect to the
145        Quota Storage when a non-root user launches a pykota command. This prevents normal
146        users from being able to modify their own, or other users', quota information.
147        The database which will be created will be named <literal>pykota</literal> by default.
148        <note>
149          <title>Note</title>
150          <para>
151            You can choose other names if you want, just modify the
152            <filename>initscripts/postgresql/pykota-postgresql.sql</filename> file
153            accordingly, and report your changes into <application>PyKota</application>'s
154            configuration file.
155          </para>
156        </note> 
157      </para>
158     
159      <para>
160        To run this script, you can use the <application>psql</application> frontend to
161        <application>PostgreSQL</application>, but your priviledges must be sufficient
162        to be allowed to create users and databases. You can launch <application>psql</application>
163        as the <literal>postgres</literal> user which is <application>PostgreSQL</application>'s
164        default administrator, and connect to the default database named <literal>template1</literal>.
165        From a command line interpreter (i.e. shell), type the following commands :
166        <screen>
167jerome@nordine:~$ cd pykota-1.15_official/initscripts/postgresql
168jerome@nordine:~/pykota-1.15_official/initscripts$ psql -h localhost -U postgres template1
169Welcome to psql, the PostgreSQL interactive terminal.
170
171Type:  \copyright for distribution terms
172       \h for help with SQL commands
173       \? for help on internal slash commands
174       \g or terminate with semicolon to execute query
175       \q to quit
176
177template1=# \i pykota-postgresql.sql
178            ... a lot of output lines
179pykota=#       
180        </screen>
181      </para>
182     
183      <para>
184        For security reasons, you may want to set passwords in
185        <application>PostgreSQL</application> for the
186        <literal>pykotaadmin</literal> and <literal>pykotauser</literal> users.
187        Otherwise any user able to connect to
188        <application>PostgreSQL</application> on your Quota Storage Server
189        could connect to the quota database, and either see it, or even modify it without problem.
190      </para>
191     
192      <para>
193        To do so, just type the following lines while still being at the <application>psql</application>
194        prompt (replace the password values by your own, and do the same for the <literal>pykotauser</literal> user) :
195        <screen>
196pykota=# ALTER USER pykotaadmin PASSWORD 'somepassword';
197ALTER USER
198pykota=# \q
199jerome@nordine:~/pykota-1.15_official/initscripts/postgresql$
200        </screen>
201      </para>
202     
203      <para>
204        The <literal>\q</literal> command above will quit the <application>psql</application>
205        program and return you to the shell's command line prompt.
206      </para>
207     
208      <para>
209        To improve security further, you could encrypt your database connections, or
210        take any other step as needed. Please refer to <application>PostgreSQL</application>'s
211        documentation for details. Also if <application>PyKota</application>'s configuration
212        file <filename>/etc/pykota/pykotadmin.conf</filename> is readable by anyone with access on your file system, a local user could
213        create some script to modify his own print quota.
214        <warning>
215          <title>Warning</title>
216          <para>
217            Defining passwords may not be sufficient if your database access rule is
218            set to <literal>trust</literal> in the <filename>/etc/postgresql/pg_hba.conf</filename>.
219            Again, please refer to <application>PostgreSQL</application>'s documentation
220            for details. Also, passwords will fly unencrypted over the network by default,
221            so be sure to take any necessary step to secure your database server from
222            unauthorized use. This has nothing to do with <application>PyKota</application>
223            though, it is just a general rule to keep in mind.
224          </para>
225        </warning> 
226      </para>
227     
228      <para>
229        If no error occured, then your Quota DataBase is ready to be used.
230        Now you can let the Quota Storage Server alone, the remaining work
231        will have to be done on each one of the print servers which will
232        use this particular Quota Storage Server.
233        <tip>
234          <title>Tip</title>
235          <para>
236            If an error occured, maybe your PostgreSQL version is too old, or
237            an unexpected problem (like a bug) happened. Please contact us via email so that we
238            can try to solve the problem. Thanks in advance.
239          </para>
240        </tip> 
241      </para>
242     
243    </sect2> 
244   
245    <sect2>
246      <title>OpenLDAP</title>
247     
248      <para>
249        From version 1.09 on, <application>OpenLDAP</application> can be used as a Quota Storage Backend.
250        It is possible that other LDAP servers can be used, but this is currently untested.
251      </para>
252     
253      <para>
254        <application>OpenLDAP</application> is a Lightweight Directory Access Protocol server
255        implementation published as Free Software.
256        You can download it from <ulink url="http://www.openldap.org">http://www.openldap.org</ulink>.
257      </para>
258     
259      <para>
260        To use <application>OpenLDAP</application> as your Quota Storage Backend, you have to copy the
261        <filename>pykota/initscripts/ldap/pykota.schema</filename> in <application>OpenLDAP</application>'s
262        schemas directory.
263        Under Debian GNU/Linux, this is something like :
264        <screen>       
265$ cp pykota.schema /etc/ldap/schema
266        </screen>
267     </para>
268     <para>   
269       Then edit <filename>/etc/ldap/slapd.conf</filename> and add a line to   
270       include the PyKota schema. You should have something
271       like :
272       <screen>   
273# Schema and objectClass definitions
274include         /etc/ldap/schema/core.schema
275include         /etc/ldap/schema/cosine.schema
276include         /etc/ldap/schema/nis.schema
277include         /etc/ldap/schema/inetorgperson.schema
278include         /etc/ldap/schema/pykota.schema
279        </screen>       
280      </para>
281     
282      <para>
283        While this is not mandatory, it is recommended that you setup
284        some indexes for some often accessed PyKota attributes.
285        Actually, the <acronym>LDAP</acronym> schema included with
286        PyKota doesn't allow indexes of another type than <literal>eq</literal>,
287        but this will change in a next release. Here are the minimal indexes
288        lines you may want to put in <filename>slapd.conf</filename> :
289        <screen>
290# Indexes for PyKota
291index pykotaUserName eq
292index pykotaGroupName eq
293index pykotaPrinterName eq
294index pykotaLastJobIdent eq
295        </screen>
296      </para>
297     
298      <para>
299        Finally, restart the <application>OpenLDAP</application> server :   
300        <screen>   
301$ /etc/init.d/slapd restart
302        </screen>
303      </para>
304     
305      <para>
306        With an <acronym>LDAP</acronym> backend, PyKota will need some branches
307        in your <acronym>LDAP</acronym> directory to put its own datas.
308        You can configure PyKota to either attach its datas to your existing
309        users and groups, or to put them in their own <literal>ou</literal>.
310        But some <literal>ou</literal>s dedicated to PyKota are needed in any case,
311        so the best bet may be to put all PyKota's datas below an <literal>ou=PyKota</literal>
312        branch. While this will separate these datas from your existing users and groups
313        entries, this may ease the maintainance.
314      </para>
315     
316      <para>
317        PyKota needs at least an <literal>ou</literal> for printers, for users quotas, for
318        groups quotas, for print jobs, and for pointers to the last job of each printer.
319        In the future, this last <literal>ou</literal> may disappear as its content
320        will probably be attached to each printer.
321      </para>
322     
323      <para>
324        Actually PyKota doesn't create these <literal>ou</literal>s for you, because it's
325        difficult to guess what is the best configuration for you. So you have to
326        create them by yourself, either directly with a text editor and the
327        <application>ldapadd</application> command, or with some specialized tool
328        like <application>gq</application>.
329      </para>
330     
331      <para>
332        Once you have chosen and created your directory structure, you have to modify PyKota's configuration files <filename>/etc/pykota/pykota.conf</filename>
333        and <filename>/etc/pykota/pykotadmin.conf</filename>
334        to set some LDAP specific options and binding <literal>dn</literal>s. The easiest is
335        probably to give a look at
336        <filename>pykota/conf/pykota.conf.sample</filename> to see all the options that are
337        needed. Adapt the values to your own configuration, and finally initialize your
338        Quota Storage with the help of the <application>edpykota</application> command.
339      </para>
340    </sect2> 
341   
342    <sect2>
343      <title>MySQL</title>
344     
345      <para>
346        A <application>MySQL</application> Storage Backend is planned, but it actually
347        doesn't exist.
348      </para>
349    </sect2> 
350   
351    <sect2>
352      <title>Berkeley DB</title>
353     
354      <para>
355        A <application>Berkeley DB</application> Storage Backend is planned, but it actually
356        doesn't exist. It seems that remote storage won't be possible with such a backend,
357        so in other terms this means that you will have a different quota database on
358        each print server. This may still prove to be useful for small configurations.
359      </para>
360    </sect2> 
361  </sect1> 
362 
363  <sect1>
364    <title>Print Server Installation</title>
365   
366    <para>
367      For each Print Server on which you plan to implement the print quota
368      mechanism, you have, of course, to have an already working printing environment.
369      Currently <application>PyKota</application> works with either
370      <ulink url="http://www.cups.org"><application>CUPS</application></ulink>
371      or <ulink url="http://lprng.sourceforge.net"><application>LPRng</application></ulink>,
372      but more printing systems may be added in the future.
373    </para>
374   
375    <para>
376      Here's the list of software you have to install on each Print Server, version numbers
377      are given as an indication of which was successfully tested, but older versions may
378      work too.
379      <itemizedlist>
380        <listitem>
381          <para>
382            <application>CUPS</application> version 1.1 or above, or <application>LPRng</application>
383            version 3.8.20 or above (it probably works with older versions but this is untested).
384            You can download them from <ulink url="http://www.cups.org">http://www.cups.org</ulink>
385            or <ulink url="http://lprng.sourceforge.net">http://lprng.sourceforge.net</ulink>
386          </para>
387        </listitem> 
388        <listitem>
389          <para>
390            Python version 2.1 or above.
391            You can download it from <ulink url="http://www.python.org">http://www.python.org</ulink>.
392          </para>
393        </listitem> 
394        <listitem>
395          <para>
396            Quota Storage client libraries, depending on your Quota Storage Backend :
397            <itemizedlist>
398              <listitem>
399                <para>
400                  PostgreSQL backend :
401                  <itemizedlist>
402                    <listitem>
403                      <para>
404                        <application>PostgreSQL</application> client libraries. They must match the <application>PostgreSQL</application>
405                        version used on your Quota Storage Server.
406                      </para>
407                    </listitem> 
408                    <listitem>
409                      <para>
410                        The <application>PygreSQL</application> python module.
411                        It must have been compiled against the same
412                        <application>PostgreSQL</application> client libraries.
413                        <application>PygreSQL</application> is normally included in
414                        <application>PostgreSQL</application>, but you may want to
415                        download it from <ulink url="http://www.pygresql.org">http://www.pygresql.org</ulink>
416                      </para>
417                    </listitem> 
418                  </itemizedlist> 
419                </para>
420              </listitem> 
421              <listitem>
422                <para>
423                  OpenLDAP backend :
424                  <itemizedlist>
425                    <listitem>
426                      <para>
427                        <application>OpenLDAP</application> client libraries. They must match
428                        the <application>OpenLDAP</application> version used on your Quota Storage Server.
429                      </para>
430                    </listitem> 
431                    <listitem>
432                      <para>
433                        The <application>Python-LDAP</application> python module.
434                        It must have been compiled against the same
435                        <application>OpenLDAP</application> client libraries.
436                        You may download this module from <ulink url="http://python-ldap.sourceforge.net">http://python-ldap.sourceforge.net</ulink>
437                      </para>
438                    </listitem> 
439                  </itemizedlist>
440                </para>
441              </listitem>
442              <listitem>
443                <para>
444                  MySQL backend : TODO
445                </para>
446              </listitem>
447              <listitem>
448                <para>
449                  Berkeley DB backend : TODO
450                </para>
451              </listitem>
452            </itemizedlist> 
453          </para>
454        </listitem> 
455        <listitem>
456          <para>
457            <application>ucd-snmp</application> or <application>net-snmp</application> tools, version 4.2.5 or above. You only need
458            the <application>snmpget</application> command.
459            You can download this software from <ulink url="http://www.sourceforge.net/projects/net-snmp/">http://www.sourceforge.net/projects/net-snmp/</ulink>.
460            You only need this if you plan to query your printers for their internal page counter via SNMP.
461          </para>
462        </listitem> 
463        <listitem>
464          <para>
465            <application>netatalk</application> version 1.6.1 or above. You only need
466            the <application>pap</application> command.
467            You can download this software from <ulink url="http://netatalk.sourceforge.net/">http://netatalk.sourceforge.net/</ulink>.
468            You only need this if you plan to query your printers for their internal page counter via AppleTalk.
469          </para>
470        </listitem> 
471        <listitem>
472          <para>
473            eGenix' mxDateTime Python module version 2.0.3 or above. It must match your default Python version.
474            You can download it from <ulink url="http://www.egenix.com">http://www.egenix.com</ulink>.
475          </para>
476        </listitem> 
477      </itemizedlist> 
478    </para>
479   
480    <para>
481      Instead of downloading all these programs' sources and compiling them, which really
482      is a boring task considering that many software are needed, you may prefer to look
483      into the packages included with your GNU/Linux distribution of choice (if you use
484      this operating system of course). Most, if not all, GNU/Linux distributions include
485      all the software mentionned above, in the form of packages which are easier to
486      install than sources tarballs. This is probably the same for the many *BSD
487      distributions.
488    </para>
489   
490    <para>
491      Once all these software are installed, installing PyKota itself is a breeze.
492      PyKota being written entirely in the Python language, which is interpreted,
493      there's no need to compile anything. You just have to execute the installation
494      script :
495      <screen>     
496$ python setup.py install     
497      </screen>
498    </para>
499   
500    <para>
501      The installation script will try to do a safe upgrade if needed.
502      Also it will check if some needed software is missing or unavailable
503      and will tell you so. This may be the case for example if you
504      installed several versions of the Python language, and some Python
505      modules are only available for one of them which is not the one you
506      are actually running.
507    </para>
508   
509    <para>
510      On your first installation, the setup script will automatically create
511      the <filename>/etc/pykota</filename> directory and put the sample
512      configuration files <filename>conf/pykota.conf.sample</filename> and
513      <filename>conf/pykotadmin.conf.sample</filename> there, after having
514      renamed them respectively <filename>pykota.conf</filename> and
515      <filename>pykotadmin.conf</filename>. Once copied there, you just
516      have to modify these files to adapt them to your own setup.
517      These files are heavily commented, so you should have no problem.
518      Also their format is quite common, because it's the one used by
519      <application>Samba</application> for example, or by <literal>.ini</literal>
520      files under <application>MS-Windows</application>, so you may already
521      be familiar with this syntax.
522      In a future release, this documentation will include the complete
523      reference for all configuration fields available. Keep in mind that
524      PyKota can be really heavily customized, and can delegate some work
525      to any external command of your choice.
526    </para>
527   
528    <para>
529      On later installations, the setup script won't modify any of your
530      configuration files. However it will try to explain what have changed
531      and encourages you to manually do the modifications which are needed.
532      Please create a backup of the <filename>/etc/pykota</filename>
533      directory before modifying anything.
534      Under some circumstances, the setup PyKota may refuse to install PyKota
535      until you have modified your configuration. Just do it and restart
536      the installation script as described above.
537    </para>
538   
539    <para>
540      PyKota features some interesting possibilities which allow you to
541      define options either globally so that they apply to all printers,
542      or on a per printer basis. Please see the sample configuration files
543      to see what I mean. In the simplest form, only a global section is
544      needed. In more complex configurations, you will have to create
545      one section per printer. Each section in the configuration files
546      begins with a name between square brackets <literal>[]</literal>.
547      The name to use to define a particular printer section is the name
548      of the print queue on which you want to set quotas.
549    </para>
550   
551    <para>
552      After you have modified PyKota's configuration files, you have to
553      double check their permissions, otherwise your installation may be
554      insecure or may not work at all.
555      The main configuration file <filename>/etc/pykota/pykota.conf</filename>
556      doesn't contain much sensitive information, so it can be made
557      readable by anyone. If normal users read this file, at best they
558      will learn the username and optional password of the read-only
559      database user, so they won't be allowed to do any harm.
560      On the other hand, the <filename>/etc/pykota/pykotadmin.conf</filename>
561      file contains the read-write user's identity and password. You must then
562      ensure that no normal user can read this file. It should only be readable
563      by the <literal>root</literal> user, which is always the case, by
564      the user your printing system is running as, and optionally by the print administrators,
565      who are usually members of the <literal>lpadmin</literal> group. Under my Debian GNU/Linux system,
566      with CUPS, here's how to do to give the correct permissions :
567      <screen>
568$ chown root.root /etc/pykota/pykota.conf     
569$ chmod 644 /etc/pykota/pykota.conf     
570$ chown lp.lpadmin /etc/pykota/pykotadmin.conf     
571$ chmod 640 /etc/pykota/pykotadmin.conf     
572      </screen>
573    </para>
574   
575    <para>
576      Now depending on your printing system, the configuration to do is particular.
577      We will now see how to plug PyKota into your printing system.
578    </para>
579   
580    <sect2>
581      <title>With CUPS</title>
582     
583      <para>
584        The easiest way to configure PyKota to be used for a particular <application>CUPS</application> print queue,
585        is to modify the <literal>PPD</literal> file associated with this print queue.
586        Say you want to set quotas on the <literal>HPLaser</literal> print queue. You
587        then just have to modify the file <filename>/etc/cups/ppd/HPLaser.ppd</filename>.
588        You will have to add the following lines somewhere near the beginning of this file :
589        <screen>
590*% Print Quota System
591*cupsFilter: "application/vnd.cups-postscript    0    /usr/bin/pykota"
592        </screen>
593      </para> 
594     
595      <para>
596        The first line is a comment. The second one tells <application>CUPS</application>
597        to launch PyKota's accounting filter just before sending the print job to
598        the printer's hardware.
599      </para>
600     
601      <para>
602        You have to restart <application>CUPS</application> for this modification to
603        take effect :
604        <screen>
605$ /etc/init.d/cupsys restart       
606        </screen>
607      </para>
608     
609      <para>
610        Repeat the above procedure for each print queue on which you want to use
611        PyKota. That's all !
612      </para>
613     
614      <sect3>
615        <title>Troubleshooting</title>
616        <para>
617          NB : the above procedure only works with <literal>PPD</literal> files which
618          don't already contain an <literal>*cupsFilter</literal> line. PostScript
619          printers usually don't need this line, but other types of printers may need
620          it. A different procedure exists for such printers, but it is not actually
621          documented. Search the mailing list archives at
622          <ulink url="http://cgi.librelogiciel.com/mailman/listinfo/pykota">
623            http://cgi.librelogiciel.com/mailman/listinfo/pykota
624          </ulink> to learn how to do.
625        </para>
626       
627        <para>
628          In case of problem, the simplest way to solve it is currently
629          to ask on PyKota's mailing list, describing the symptoms, as
630          well as the hardware and software you use.
631          In a future release of this document, a section dedicated to
632          Frequently Asked Questions will be included.
633        </para>
634      </sect3> 
635     
636    </sect2>
637   
638    <sect2>
639      <title>With LPRng</title>
640      <para>
641        To plug PyKota into your <application>LPRng</application> setup,
642        you have to modify the <filename>/etc/printcap</filename>.
643        You just have to add the following lines to each queue on
644        which you want to use PyKota :
645        <screen>
646  :achk=true
647  :as=|/usr/bin/pykota
648        </screen>
649      </para>
650     
651      <para>
652        You have to restart <application>LPRng</application> for this modification to
653        take effect :
654        <screen>
655$ /etc/init.d/lprng restart       
656        </screen>
657      </para>
658     
659      <para>
660        Repeat the above procedure for each print queue on which you want to use
661        PyKota. That's all !
662      </para>
663     
664      <sect3>
665        <title>Troubleshooting</title>
666        <para>
667          In case of problem, the simplest way to solve it is currently
668          to ask on PyKota's mailing list, describing the symptoms, as
669          well as the hardware and software you use.
670          In a future release of this document, a section dedicated to
671          Frequently Asked Questions will be included.
672        </para>
673      </sect3> 
674     
675    </sect2>
676   
677  </sect1> 
678</chapter>
679
680<!--
681
682$Log$
683Revision 1.21  2003/10/14 20:26:53  jalet
684Better documentation.
6851.15 is out !
686
687Revision 1.20  2003/07/25 13:20:32  jalet
688Typo which wasn't
689
690Revision 1.19  2003/07/25 13:18:44  jalet
691Typos
692
693Revision 1.18  2003/07/25 10:41:29  jalet
694Better documentation.
695pykotme now displays the current user's account balance.
696Some test changed in ldap module.
697
698Revision 1.17  2003/06/30 21:44:18  jalet
6991.09 is out !
700
701Revision 1.16  2003/06/24 21:37:05  jalet
702Minor changes
703
704Revision 1.15  2003/06/10 16:37:54  jalet
705Deletion of the second user which is not needed anymore.
706Added a debug configuration field in /etc/pykota.conf
707All queries can now be sent to the logger in debug mode, this will
708greatly help improve performance when time for this will come.
709
710Revision 1.14  2003/06/05 07:12:29  jalet
711Reorganization of directories
712
713Revision 1.13  2003/04/24 21:09:47  jalet
714Documentation slightly improved.
715
716Revision 1.12  2003/04/17 21:33:16  jalet
717Version 1.03 is out.
718
719Revision 1.11  2003/03/25 09:32:06  jalet
720Improved documentation.
721
722Revision 1.10  2003/03/23 17:59:56  jalet
723Clarify a point.
724
725Revision 1.9  2003/03/23 17:57:20  jalet
726Deleted a repetition.
727
728Revision 1.8  2003/03/22 15:34:50  jalet
729More complete installation documentation.
730
731Revision 1.7  2003/03/22 14:26:45  jalet
732Download instructions added.
733
734Revision 1.6  2003/03/22 14:06:02  jalet
735Quota Storage Server installation is OK for PostgreSQL.
736
737Revision 1.5  2003/03/22 13:11:33  jalet
738The port on which the Quota Storage Sever is listening can now
739be set in the configuration file (see sample).
740Better error handling if PygreSQL is not installed.
741Improved documentation.
742Version number changed to 1.02alpha
743
744Revision 1.4  2003/03/22 07:20:38  jalet
745More information wrt PostgreSQL tcp/ip configuration.
746
747Revision 1.3  2003/03/18 22:18:25  jalet
748The documentation will only be a sequence of chapters in a single part, not
749multiple parts each including chapters.
750
751Revision 1.2  2003/03/18 22:10:54  jalet
752Documentation improvements.
753
754Revision 1.1  2003/02/08 00:03:35  jalet
755Documentation skeleton added
756
757
758-->
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