[695] | 1 | # $Id$ |
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| 2 | |
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[952] | 3 | PyKota - Print Quota for CUPS and LPRng |
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[695] | 4 | |
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[1257] | 5 | (c) 2003-2004 Jerome Alet <alet@librelogiciel.com> |
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[873] | 6 | This program is free software; you can redistribute it and/or modify |
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| 7 | it under the terms of the GNU General Public License as published by |
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| 8 | the Free Software Foundation; either version 2 of the License, or |
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| 9 | (at your option) any later version. |
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[695] | 10 | |
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[873] | 11 | This program is distributed in the hope that it will be useful, |
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| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 14 | GNU General Public License for more details. |
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[695] | 15 | |
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[873] | 16 | You should have received a copy of the GNU General Public License |
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| 17 | along with this program; if not, write to the Free Software |
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| 18 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. |
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| 19 | |
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[761] | 20 | ==================================================================== |
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[695] | 21 | |
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[1052] | 22 | READ SPECIAL LICENSING AND REDISTRIBUTION TERMS IN THE FILE 'LICENSE' |
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[761] | 23 | |
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| 24 | ==================================================================== |
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| 25 | |
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[1154] | 26 | PyKota features : |
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| 27 | ----------------- |
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[695] | 28 | |
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[1154] | 29 | Operating systems : |
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| 30 | |
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| 31 | - Any Unix-like system as print server. |
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| 32 | |
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| 33 | - Any operating system as client. |
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| 34 | |
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| 35 | Printing systems : |
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| 36 | |
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[1283] | 37 | - Supports both CUPS and LPRng as the printing system. |
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[1154] | 38 | |
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| 39 | Databases : |
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| 40 | |
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| 41 | - Supports PostgreSQL as the Quota Storage backend. |
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[1283] | 42 | Complete database creation script in SQL is included. |
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[1043] | 43 | |
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[1154] | 44 | - Supports OpenLDAP as the Quota Storage backend. |
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[1475] | 45 | Complete LDAP schema and sample empty tree are included. |
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[1160] | 46 | Plugging PyKota into your existing LDAP infrastructure |
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| 47 | is really easy thanks to PyKota's great configurability. |
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| 48 | |
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[1154] | 49 | Printers : |
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| 50 | |
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[1475] | 51 | - Hardware or Software accounting methods are completely |
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| 52 | configurable. |
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| 53 | |
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[1154] | 54 | - Supports any printer which can report its internal |
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[1475] | 55 | page counter. Can ask printers for their internal |
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| 56 | page counter via SNMP, Netatalk, or any other way. |
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| 57 | This is completely configurable. |
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[1154] | 58 | |
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[1475] | 59 | - Supports PostScript and PCL5 printers natively, |
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| 60 | more formats to come. |
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| 61 | |
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[1154] | 62 | - Supports any other printer via GhostScript. |
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[1161] | 63 | Depending on the printer some configuration may |
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| 64 | be needed. |
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[1154] | 65 | |
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| 66 | Quota systems : |
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| 67 | |
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[1260] | 68 | - Supports printers and printers groups quotas. |
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[739] | 69 | |
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[1260] | 70 | - Supports users and users groups quotas. |
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| 71 | |
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[1154] | 72 | - Supports page quotas. |
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| 73 | Page quotas can be set differently on a per printer |
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| 74 | and per user/group basis. |
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[739] | 75 | |
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[1154] | 76 | - Supports account balance quotas in any currency. |
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| 77 | Account balance quotas can be set on a per user |
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| 78 | basis. The account balance is shared amongst |
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| 79 | all printers. |
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[980] | 80 | |
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[1154] | 81 | - Page quota and account balance can be set/reset |
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| 82 | independantly. |
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| 83 | |
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| 84 | - Limiting factor, page quota or account balance, |
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| 85 | can be set on a per user or per group basis. |
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| 86 | |
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| 87 | - Price per page and per job can be set differently |
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| 88 | on any printer. |
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[794] | 89 | |
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[1154] | 90 | - Low level of page quota or account balance are |
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| 91 | configurable. |
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[739] | 92 | |
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[1154] | 93 | - Both soft and hard limit with configurable grace delay |
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| 94 | can be set for page quota. |
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[900] | 95 | |
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[1154] | 96 | - Possibility to disable quota enforcement for any user |
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| 97 | or group, while still keeping page accounting. |
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| 98 | |
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| 99 | Administration : |
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| 100 | |
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| 101 | - Powerful administration tools can be used to |
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| 102 | automate setting or resetting of quotas or |
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| 103 | account balances at specific intervals. |
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[925] | 104 | |
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[1154] | 105 | - Administration tools can modify several users, |
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| 106 | groups, or printers at once. |
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[925] | 107 | |
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[1154] | 108 | - Account balances can be set, incremented, or |
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| 109 | decremented. |
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[1153] | 110 | |
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[1273] | 111 | - Both printers and users can be automatically added on |
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| 112 | first print in a completely configurable way. |
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[1154] | 113 | |
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| 114 | - Quota report generator available either from the |
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| 115 | command line or in any web browser. |
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| 116 | The web-based quota report generator can be |
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| 117 | user/password protected. |
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| 118 | |
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| 119 | - Print quote generator can tell users how much |
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| 120 | a print job will cost them in advance. |
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| 121 | |
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| 122 | - Policy with regard to unregistered users can |
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| 123 | be configured for each printer to either deny |
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| 124 | printing, allow printing, or delegate the |
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| 125 | decision to any external tool. |
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| 126 | |
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| 127 | - Warning and error messages can be automatically |
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| 128 | sent via email to the administrator, the user, |
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| 129 | both, or none. |
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| 130 | |
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| 131 | - Warning and error messages' content is completely |
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| 132 | configurable. |
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| 133 | |
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| 134 | - Configuration can be changed without needing to |
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| 135 | restart the printing system. |
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[739] | 136 | |
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[1154] | 137 | - Complete print job history is kept. This can be |
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| 138 | disabled if needed. |
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| 139 | |
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| 140 | - Automated low quota or balance remainder can be |
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| 141 | scheduled regularly or launched manually. |
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| 142 | |
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[1155] | 143 | User Interface : |
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| 144 | |
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[1154] | 145 | - All the command line tools accept the -h | --help |
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| 146 | command line option which prints all the available |
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| 147 | options and show usage examples. |
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[1155] | 148 | |
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| 149 | - Completely internationalized. Actually supports the |
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[1402] | 150 | English, French, Spanish, Portuguese, Brasilian, Swedish |
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| 151 | and Italian languages. More to come. |
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[1154] | 152 | |
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| 153 | ==================================================================== |
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| 154 | |
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[739] | 155 | Planned features are described in the TODO file. |
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| 156 | |
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[980] | 157 | Actually three (or an infinity of) page accounting methods are |
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| 158 | implemented : |
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[695] | 159 | |
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[1475] | 160 | - The 'hardware' method consists in querying the printer (via SNMP |
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[1181] | 161 | or Netatalk or any other method of your choice) for its total pages |
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[1186] | 162 | counter. |
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[980] | 163 | |
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[1186] | 164 | With CUPS, this is done both at the beginning and at the end of a |
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| 165 | print job. The counters difference is then immediately used to |
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| 166 | decrease the user's account balance or increase his quota usage. |
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| 167 | |
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| 168 | With LPRng, this is done just before the beginning of a job, and used |
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| 169 | this to modify the *preceding* user's quota. So you're always late |
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[1402] | 170 | of one print job, but this is generally ok. |
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[1186] | 171 | |
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[1475] | 172 | - The 'software' method consists in delegating the computation of the |
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[980] | 173 | job's size in number of pages to any external command of your choice. |
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| 174 | The command can read the job's data from its standard input and MUST |
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[1186] | 175 | output the job's size on its standard output. Changes to the user |
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| 176 | account are reported immediately, both with CUPS and LPRng. |
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[980] | 177 | |
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[919] | 178 | PyKota is known to work fine with HP Laserjet 2100 and 2200, and |
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[980] | 179 | Apple LaserWriter 16/600 PS, both with CUPS and LPRng, under |
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[1402] | 180 | Debian GNU/Linux (Sarge and Sid) operating systems. It should work |
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| 181 | fine with most network printers. |
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[724] | 182 | |
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[695] | 183 | ============================================================ |
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| 184 | |
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| 185 | INSTALLATION: |
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| 186 | ============= |
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| 187 | |
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[1186] | 188 | NB : |
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| 189 | ==== |
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[887] | 190 | |
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[1397] | 191 | You may learn more about PyKota, if it fits your own organization, |
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| 192 | its internal working, and some potential performance drawbacks and |
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| 193 | how to avoid them, in a WiKi administered by Ryan Suarez at : |
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| 194 | |
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| 195 | http://webcrossing.macosxlabs.org/webx?14@30.QAu3a5k0c4z.7@.26bf4661 |
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[1034] | 196 | |
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[714] | 197 | Prerequisite : |
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| 198 | -------------- |
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| 199 | |
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| 200 | You need to have the following tools installed on the CUPS Server : |
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| 201 | |
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[952] | 202 | - CUPS or LPRng |
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[809] | 203 | - Python v2.1 or above |
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[714] | 204 | - eGenix' mxDateTime Python extension |
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[919] | 205 | - SNMP tools (specifically the snmpget command) if you plan to |
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| 206 | request your printer's lifetime page counter via SNMP. |
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| 207 | - Netatalk (specifically the pap command) if you plan to |
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| 208 | request your printer's lifetime page counter via AppleTalk. |
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[1043] | 209 | - PostgreSQL's PygreSQL Python extension and the PostgreSQL client |
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| 210 | libraries if you plan to use PostgreSQL as the Quota Storage |
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| 211 | backend. |
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| 212 | or |
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| 213 | - python-ldap Python module and the OpenLDAP client libraries |
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| 214 | if you plan to use OpenLDAP as the Quota Storage backend. |
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[714] | 215 | |
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[1186] | 216 | You may also benefit from having the following tools installed to |
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| 217 | deal with some printers : |
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| 218 | |
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| 219 | - npadmin |
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| 220 | - netcat |
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| 221 | - ghostscript |
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| 222 | |
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[714] | 223 | You need to have the following tools installed on the Quota Storage |
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| 224 | Server : |
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| 225 | |
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| 226 | - PostgreSQL |
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| 227 | |
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[1043] | 228 | or |
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| 229 | |
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| 230 | - OpenLDAP |
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| 231 | |
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[1086] | 232 | NB : |
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| 233 | |
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| 234 | PygreSQL must be linked with the PostgreSQL client libraries on |
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| 235 | the Print Server. The PostgreSQL client libraries' version must |
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| 236 | match the PostgreSQL version used on the Quota Storage Server. |
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[1402] | 237 | BEWARE : under Debian Sarge, as of March 15th 2004, there's a |
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| 238 | problem with python2.2-pygresql and python-2.3-pygresql, so please |
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| 239 | install python2.1-pygresql and use Python 2.1 to install and run |
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| 240 | PyKota. This is not a bug in PyKota, and this should be fixed |
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| 241 | by Debian in a few days I hope. |
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[714] | 242 | |
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[1043] | 243 | or |
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| 244 | |
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[1086] | 245 | python-ldap must be linked with the OpenLDAP client libraries on the |
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| 246 | Print Server. The OpenLDAP client libraries' version must match the |
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| 247 | OpenLDAP version used on the Quota Storage Server. |
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[1043] | 248 | |
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[714] | 249 | This list of prerequisite software may change in the future, when |
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| 250 | PyKota will support more functionnalities you will be given |
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| 251 | alternatives. |
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| 252 | |
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[952] | 253 | Of course the Print Server and the Quota Storage Server can be the |
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[851] | 254 | very same machine if you've got a tiny network, or you can have |
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[952] | 255 | multiple Print Servers all storing their quotas on the same Quota |
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[851] | 256 | Storage Server if you've got a bigger network. |
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| 257 | |
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[714] | 258 | Then : |
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| 259 | ------ |
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| 260 | |
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[724] | 261 | Download the latest PyKota version from the CVS tree on : |
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[695] | 262 | |
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[725] | 263 | http://savannah.nongnu.org/projects/pykota |
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[695] | 264 | |
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[714] | 265 | Just type : |
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[695] | 266 | |
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[725] | 267 | python setup.py install |
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[695] | 268 | |
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| 269 | You may need to be logged in with sufficient privileges (e.g. root) |
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| 270 | |
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[878] | 271 | The installation script will now automatically check if some software |
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| 272 | is missing and ask you if you still want to proceed with the |
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| 273 | installation or abort it completely. |
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| 274 | |
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[695] | 275 | Go to the initscripts subdirectory of PyKota's sources, and choose |
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| 276 | the appropriate storage backend for your configuration. Read |
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| 277 | the associated README file and execute the initialization script |
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[878] | 278 | to create an empty PyKota Storage. Upgrade scripts may be |
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| 279 | provided as well. |
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[695] | 280 | |
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[1186] | 281 | Copy the conf/pykota.conf.sample and conf/pykotadmin.conf.sample |
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[1107] | 282 | sample configuration files to /etc/pykota/pykota.conf and |
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[1186] | 283 | /etc/pykota/pykotadmin.conf. The installation script tries to do |
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| 284 | this for you if needed and you agreed to this action. You need to |
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| 285 | adapt these files to your own needs. Especially you have to create |
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| 286 | sections named after your own printers, and change the |
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| 287 | administrator's email address which by default is root@localhost. |
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| 288 | Read and try to understand these two very well commented files, |
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| 289 | so that you'll encounter less problems later. |
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[1198] | 290 | |
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| 291 | Also be sure to double check that commands that query printers |
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[1186] | 292 | for their internal page counter work from the command line |
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| 293 | before using them in PyKota's configuration. |
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[695] | 294 | |
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[1186] | 295 | The rest of the installation depends on your printing system : |
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| 296 | |
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[1185] | 297 | - CUPS Printing System : |
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[952] | 298 | |
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[1185] | 299 | Once and for all : |
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[952] | 300 | |
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[1185] | 301 | Create a symbolic link to the cupspykota backend |
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| 302 | in CUPS's backend directory : |
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| 303 | |
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| 304 | $ cd /usr/lib/cups/backend |
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[1345] | 305 | $ ln -s /usr/share/pykota/cupspykota cupspykota |
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[1185] | 306 | |
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| 307 | Restart CUPS so that the new backend can be detected. |
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| 308 | |
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| 309 | $ /etc/init.d/cupsys restart |
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| 310 | |
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[1206] | 311 | For dumb printers : |
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| 312 | |
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| 313 | The FAQ contains both the PyKota's definition of a 'dumb' |
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| 314 | printer, and how to deal with them. |
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| 315 | |
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[1185] | 316 | For new printers : |
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[952] | 317 | |
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[1185] | 318 | Go to CUPS management interface (http://localhost:631) |
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| 319 | and choose the appropriate PyKota managed device depending |
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| 320 | on the type of printer you use. For example, if your |
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| 321 | printer is waiting on : |
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| 322 | |
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[1354] | 323 | socket://myprinter.example.com:9100 |
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[1185] | 324 | |
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| 325 | Then choose : |
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| 326 | |
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[1354] | 327 | cupspykota:socket://myprinter.example.com:9100 |
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[1185] | 328 | |
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| 329 | Configure your printer as usual. |
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| 330 | |
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[1186] | 331 | Now double check /etc/pykota/pykota.conf |
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| 332 | This file should contain a section named after the |
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[1402] | 333 | printer you've just added, unless you have set |
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| 334 | all options globally. |
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[1408] | 335 | The new pkhint command can help you with correct settings |
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| 336 | for your printers, but don't rely on it because it is still |
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| 337 | incomplete. |
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[1186] | 338 | |
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[1185] | 339 | That's all. |
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[952] | 340 | |
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[1185] | 341 | For existing printers : |
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| 342 | |
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[1186] | 343 | If you had already installed a version of PyKota earlier |
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| 344 | than 1.16alpha7, then remove the *cupsFilter lines in your |
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| 345 | PPD files for each printer already managed printers. Each |
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| 346 | line to remove is of the form : |
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[1185] | 347 | |
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[1345] | 348 | *cupsFilter: "application/vnd.cups-postscript 0 /usr/share/pykota/pykota" |
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[1185] | 349 | |
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[1345] | 350 | This means that each time the pstops filter will be executed, it will |
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| 351 | pass the job's data through the pykota filter which is present in |
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| 352 | /usr/share/pykota |
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| 353 | |
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[1185] | 354 | Don't touch anything else, especially any other *cupsFilter line. |
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[1186] | 355 | Then save each of these files. |
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[1185] | 356 | |
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| 357 | Then, the easiest is to directly modify the DeviceURI lines |
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| 358 | in /etc/cups/printers.conf, you just have to put |
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| 359 | 'cupspykota:' in front of what is already on these lines. |
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| 360 | For example, replace : |
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| 361 | |
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[1354] | 362 | DeviceURI socket://myprinter.example.com:9100 |
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[1185] | 363 | |
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| 364 | with : |
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| 365 | |
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[1354] | 366 | DeviceURI cupspykota:socket://myprinter.example.com:9100 |
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[1345] | 367 | |
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| 368 | or : |
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[1185] | 369 | |
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[1354] | 370 | DeviceURI cupspykota://socket://myprinter.example.com:9100 |
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[1345] | 371 | |
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[1185] | 372 | Save the file and restart CUPS. |
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[695] | 373 | |
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[1185] | 374 | - LPRng Printing System : |
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[952] | 375 | |
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| 376 | Modify the /etc/printcap file to add two lines identical to these ones : |
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| 377 | |
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| 378 | :achk=true |
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[1345] | 379 | :as=|/usr/share/pykota/pykota |
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[952] | 380 | |
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| 381 | For each printer on which you want to use print accounting. |
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[1186] | 382 | |
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| 383 | And then save the file and restart LPRng : |
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| 384 | |
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| 385 | $ /etc/init.d/lprng restart |
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| 386 | |
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| 387 | Now you can begin to populate the PyKota's database with printers, |
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| 388 | users and groups : |
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[952] | 389 | |
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[716] | 390 | Add printers and users to the quota system and set their quota values : |
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[695] | 391 | |
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[1345] | 392 | Starting from version 1.18alpha2, the preferred command to manage |
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| 393 | printers is named pkprinters |
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| 394 | |
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| 395 | $ pkprinters --help |
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| 396 | |
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| 397 | will tell you how to create, manage or delete printers and |
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| 398 | printers groups. |
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[1402] | 399 | |
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| 400 | $ pkprinters --add --charge 0.05 hp2100 |
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| 401 | |
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| 402 | would add the printer named hp2100 with a price per page |
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| 403 | of 0.05 unit. |
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[1345] | 404 | |
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[1402] | 405 | Now set quotas for users on this printer : |
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| 406 | |
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[1086] | 407 | $ edpykota --add -P hp2100 -S 40 -H 50 user1 ... userN |
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[724] | 408 | |
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[725] | 409 | launching edpykota without any argument or with the --help |
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| 410 | command line option will show you all the possibilities. |
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[1086] | 411 | |
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| 412 | by default, each user is limited by "quota", this means that on |
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| 413 | each printer he can have a different soft and hard limit. |
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| 414 | You may want to limit the user by his account balance value, |
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[1107] | 415 | in which case, the print quota is shared between all printers |
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[1086] | 416 | instead of being different. To do this, use the following : |
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| 417 | |
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| 418 | $ edpykota --add -P hp2100 --limitby balance --balance 10 user1 ... userN |
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| 419 | |
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| 420 | This will put 10 $ (or Euros, PyKota doesn't care) on each user's account |
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| 421 | balance, and tell PyKota to limit them by their account balance value. |
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| 422 | Whenever they print on any printer, their account balance value is |
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| 423 | decreased by an amount which depends on the particular price per page |
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| 424 | and per job that you may have defined on the printer with edpykota's |
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| 425 | --charge command line option. |
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[1107] | 426 | Soft and Hard limits are not used if "--limitby balance" is used, |
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| 427 | but you can define a "poorman"'s threshold in /etc/pykota/pykota.conf |
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| 428 | to obtain a similar result (warning message when quota is low). |
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[695] | 429 | |
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[990] | 430 | Restart CUPS or LPRng, for example under Debian GNU/Linux systems : |
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[695] | 431 | |
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[725] | 432 | $ /etc/init.d/cupsys restart |
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[990] | 433 | |
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| 434 | or : |
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| 435 | |
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| 436 | $ /etc/init.d/lprng restart |
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[695] | 437 | |
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| 438 | Your users now should be able to print but not exceed their |
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| 439 | printing quota. |
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| 440 | |
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[1149] | 441 | To see printer quota usage, you can use : |
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[794] | 442 | |
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| 443 | $ repykota --printer lp |
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| 444 | |
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| 445 | or : |
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| 446 | |
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| 447 | $ repykota |
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| 448 | |
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| 449 | which will print quota usage for all users on all printers, |
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[1107] | 450 | along with totals, if you are the root user. If you are |
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| 451 | a regular user, only your own quota report will be produced. |
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[794] | 452 | |
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[1107] | 453 | Quota reports are also available remotely by using the CGI script |
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[1345] | 454 | printquota.cgi provided in the cgi-bin/ subdirectory. You can |
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| 455 | also use the CSS stylesheet present in the stylesheets/ subdirectory |
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[1402] | 456 | and put it at your web server's DocumentRoot, to benefit from a nicer |
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| 457 | look, especially quota violations will appear in different colors. |
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[990] | 458 | |
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[980] | 459 | For different security concerns, please give a look at the SECURITY |
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| 460 | file which is part of this software. |
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[741] | 461 | |
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[695] | 462 | ============================================================ |
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| 463 | |
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[958] | 464 | Mailing list : |
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| 465 | -------------- |
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| 466 | |
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| 467 | A mailing list is dedicated to Pykota, you can subscribe to it |
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| 468 | or consult its archives at : |
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| 469 | |
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| 470 | http://cgi.librelogiciel.com/mailman/listinfo/pykota |
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| 471 | |
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[1181] | 472 | IRC : |
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| 473 | ----- |
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| 474 | |
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| 475 | You can also chat with us : |
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| 476 | |
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| 477 | /server irc.freenode.net |
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| 478 | /join #pykota |
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| 479 | |
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[958] | 480 | ============================================================ |
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| 481 | |
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[1107] | 482 | Please e-mail bugs to the mailing list at : pykota@librelogiciel.com |
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| 483 | or to the main author at : alet@librelogiciel.com (Jerome Alet) |
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