[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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| 5 | (c) 2003 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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| 37 | - Supports CUPS as the printing system. |
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[952] | 38 | |
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[1154] | 39 | - Supports LPRng as the printing system. |
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| 40 | |
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| 41 | Databases : |
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| 42 | |
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| 43 | - Supports PostgreSQL as the Quota Storage backend. |
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| 44 | Complete database creation SQL script is included. |
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[1043] | 45 | |
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[1154] | 46 | - Supports OpenLDAP as the Quota Storage backend. |
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| 47 | Complete LDAP schema and sample tree are included. |
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| 48 | |
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| 49 | Printers : |
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| 50 | |
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| 51 | - Supports any printer which can report its internal |
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| 52 | page counter. |
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| 53 | |
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| 54 | - Supports any other printer via GhostScript. |
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[739] | 55 | |
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[1154] | 56 | - Can ask printers for their internal page counter |
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| 57 | via SNMP, Netatalk, or any other mean of your |
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| 58 | choice. This is completely configurable. |
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| 59 | |
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| 60 | - External accounting methods are configurable |
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| 61 | |
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| 62 | Quota systems : |
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| 63 | |
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| 64 | - Supports user and groups quotas. |
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[739] | 65 | |
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[1154] | 66 | - Supports page quotas. |
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| 67 | Page quotas can be set differently on a per printer |
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| 68 | and per user/group basis. |
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[739] | 69 | |
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[1154] | 70 | - Supports account balance quotas in any currency. |
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| 71 | Account balance quotas can be set on a per user |
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| 72 | basis. The account balance is shared amongst |
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| 73 | all printers. |
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[980] | 74 | |
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[1154] | 75 | - Experimental support for printer groups, so that |
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| 76 | you can share quota between printers of the same |
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| 77 | type but in different locations. |
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| 78 | |
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| 79 | - Page quota and account balance can be set/reset |
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| 80 | independantly. |
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| 81 | |
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| 82 | - Limiting factor, page quota or account balance, |
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| 83 | can be set on a per user or per group basis. |
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| 84 | |
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| 85 | - Price per page and per job can be set differently |
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| 86 | on any printer. |
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[794] | 87 | |
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[1154] | 88 | - Low level of page quota or account balance are |
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| 89 | configurable. |
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[739] | 90 | |
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[1154] | 91 | - Both soft and hard limit with configurable grace delay |
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| 92 | can be set for page quota. |
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[900] | 93 | |
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[1154] | 94 | - Possibility to disable quota enforcement for any user |
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| 95 | or group, while still keeping page accounting. |
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| 96 | |
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| 97 | Administration : |
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| 98 | |
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| 99 | - Powerful administration tools can be used to |
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| 100 | automate setting or resetting of quotas or |
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| 101 | account balances at specific intervals. |
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[925] | 102 | |
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[1154] | 103 | - Administration tools can modify several users, |
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| 104 | groups, or printers at once. |
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[925] | 105 | |
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[1154] | 106 | - Account balances can be set, incremented, or |
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| 107 | decremented. |
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[1153] | 108 | |
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[1154] | 109 | - Users can be automatically added on first print |
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| 110 | in a completely configurable way. |
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| 111 | |
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| 112 | - Quota report generator available either from the |
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| 113 | command line or in any web browser. |
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| 114 | The web-based quota report generator can be |
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| 115 | user/password protected. |
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| 116 | |
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| 117 | - Print quote generator can tell users how much |
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| 118 | a print job will cost them in advance. |
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| 119 | |
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| 120 | - Policy with regard to unregistered users can |
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| 121 | be configured for each printer to either deny |
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| 122 | printing, allow printing, or delegate the |
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| 123 | decision to any external tool. |
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| 124 | |
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| 125 | - Warning and error messages can be automatically |
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| 126 | sent via email to the administrator, the user, |
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| 127 | both, or none. |
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| 128 | |
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| 129 | - Warning and error messages' content is completely |
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| 130 | configurable. |
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| 131 | |
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| 132 | - Configuration can be changed without needing to |
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| 133 | restart the printing system. |
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[739] | 134 | |
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[1154] | 135 | - Complete print job history is kept. This can be |
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| 136 | disabled if needed. |
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| 137 | |
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| 138 | - Automated low quota or balance remainder can be |
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| 139 | scheduled regularly or launched manually. |
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| 140 | |
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| 141 | - All the command line tools accept the -h | --help |
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| 142 | command line option which prints all the available |
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| 143 | options and show usage examples. |
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| 144 | |
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| 145 | ==================================================================== |
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| 146 | |
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[739] | 147 | Planned features are described in the TODO file. |
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| 148 | |
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[980] | 149 | Actually three (or an infinity of) page accounting methods are |
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| 150 | implemented : |
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[695] | 151 | |
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[980] | 152 | - The 'querying' method consists in querying the printer (via SNMP |
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| 153 | or Netatalk) for its total pages counter, just before the beginning |
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| 154 | of a job, and use this to modify the *preceding* user's quota. So |
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| 155 | you're always late of one print job, but this is generally ok, |
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| 156 | especially because a check is also done to see if the current user |
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| 157 | is allowed or not to print. You're not limited to SNMP or Netatalk, |
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| 158 | because you can also use any external command instead if you want. |
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| 159 | |
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| 160 | - The 'external' method consists in delegating the computation of the |
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| 161 | job's size in number of pages to any external command of your choice. |
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| 162 | The command can read the job's data from its standard input and MUST |
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| 163 | output the job's size on its standard output. |
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| 164 | |
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| 165 | - The 'stupid' method consists in counting the 'showpage' PostSript |
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| 166 | statements in the job. THIS IS UNRELIABLE, but can serve as an |
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| 167 | example if you plan to write your own accounting method for |
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| 168 | integration into PyKota. |
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[724] | 169 | |
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[919] | 170 | PyKota is known to work fine with HP Laserjet 2100 and 2200, and |
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[980] | 171 | Apple LaserWriter 16/600 PS, both with CUPS and LPRng, under |
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| 172 | Debian GNU/Linux (Sarge and Sid) operating systems. |
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[724] | 173 | |
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[980] | 174 | I'm interested in receiving success or failure reports with other |
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| 175 | brands or models of printers, as well as with other operating |
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| 176 | systems. |
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[859] | 177 | |
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[695] | 178 | ============================================================ |
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| 179 | |
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| 180 | INSTALLATION: |
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| 181 | ============= |
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| 182 | |
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[887] | 183 | WARNING : |
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| 184 | ========= |
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| 185 | |
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[942] | 186 | If you run a PyKota version lower than 1.03, you definitely have to |
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[887] | 187 | upgrade you Quota Storage Database. Please read the documentation |
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| 188 | included in the initscripts subdirectory first ! |
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| 189 | |
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[1034] | 190 | Users of MacOS-X may find the following tutorial useful : |
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| 191 | |
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| 192 | http://ell-tech.com/pages/pykota.php |
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| 193 | |
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[714] | 194 | Prerequisite : |
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| 195 | -------------- |
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| 196 | |
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| 197 | You need to have the following tools installed on the CUPS Server : |
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| 198 | |
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[952] | 199 | - CUPS or LPRng |
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[809] | 200 | - Python v2.1 or above |
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[714] | 201 | - eGenix' mxDateTime Python extension |
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[919] | 202 | - SNMP tools (specifically the snmpget command) if you plan to |
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| 203 | request your printer's lifetime page counter via SNMP. |
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| 204 | - Netatalk (specifically the pap command) if you plan to |
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| 205 | request your printer's lifetime page counter via AppleTalk. |
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[1043] | 206 | - PostgreSQL's PygreSQL Python extension and the PostgreSQL client |
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| 207 | libraries if you plan to use PostgreSQL as the Quota Storage |
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| 208 | backend. |
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| 209 | or |
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| 210 | - python-ldap Python module and the OpenLDAP client libraries |
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| 211 | if you plan to use OpenLDAP as the Quota Storage backend. |
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[714] | 212 | |
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| 213 | You need to have the following tools installed on the Quota Storage |
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| 214 | Server : |
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| 215 | |
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| 216 | - PostgreSQL |
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| 217 | |
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[1043] | 218 | or |
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| 219 | |
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| 220 | - OpenLDAP |
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| 221 | |
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[1086] | 222 | NB : |
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| 223 | |
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| 224 | PygreSQL must be linked with the PostgreSQL client libraries on |
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| 225 | the Print Server. The PostgreSQL client libraries' version must |
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| 226 | match the PostgreSQL version used on the Quota Storage Server. |
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[714] | 227 | |
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[1043] | 228 | or |
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| 229 | |
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[1086] | 230 | python-ldap must be linked with the OpenLDAP client libraries on the |
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| 231 | Print Server. The OpenLDAP client libraries' version must match the |
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| 232 | OpenLDAP version used on the Quota Storage Server. |
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[1043] | 233 | |
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[714] | 234 | This list of prerequisite software may change in the future, when |
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| 235 | PyKota will support more functionnalities you will be given |
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| 236 | alternatives. |
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| 237 | |
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[952] | 238 | Of course the Print Server and the Quota Storage Server can be the |
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[851] | 239 | very same machine if you've got a tiny network, or you can have |
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[952] | 240 | multiple Print Servers all storing their quotas on the same Quota |
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[851] | 241 | Storage Server if you've got a bigger network. |
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| 242 | |
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[714] | 243 | Then : |
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| 244 | ------ |
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| 245 | |
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[724] | 246 | Download the latest PyKota version from the CVS tree on : |
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[695] | 247 | |
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[725] | 248 | http://savannah.nongnu.org/projects/pykota |
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[695] | 249 | |
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[714] | 250 | Just type : |
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[695] | 251 | |
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[725] | 252 | python setup.py install |
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[695] | 253 | |
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| 254 | You may need to be logged in with sufficient privileges (e.g. root) |
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| 255 | |
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[878] | 256 | The installation script will now automatically check if some software |
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| 257 | is missing and ask you if you still want to proceed with the |
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| 258 | installation or abort it completely. |
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| 259 | |
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[695] | 260 | Go to the initscripts subdirectory of PyKota's sources, and choose |
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| 261 | the appropriate storage backend for your configuration. Read |
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| 262 | the associated README file and execute the initialization script |
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[878] | 263 | to create an empty PyKota Storage. Upgrade scripts may be |
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| 264 | provided as well. |
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[695] | 265 | |
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[1107] | 266 | Copy the conf/pykota.conf.sample and conf/pykotadmin.conf.sample |
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| 267 | sample configuration files to /etc/pykota/pykota.conf and |
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| 268 | /etc/pykota/pykotadmin.conf. The installation script tries to do this |
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| 269 | for you if needed and you agreed to this action. |
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| 270 | You need to adapt these files to your own needs. |
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[1015] | 271 | Especially you have to create sections named after your own |
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| 272 | printers, and change the administrator's email address. |
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[695] | 273 | |
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[952] | 274 | - CUPS Print Backend : |
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| 275 | |
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| 276 | Modify the PPD files for each printer on which you want to manage |
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| 277 | print quotas, for example /etc/cups/ppd/lp.ppd : |
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| 278 | |
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| 279 | --- Add the line below exactly as-is somewhere near the top --- |
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| 280 | *cupsFilter: "application/vnd.cups-postscript 0 /usr/bin/pykota" |
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| 281 | --- Add the line above exactly as-is somewhere near the top --- |
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| 282 | |
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| 283 | Modify the path to the pykota executable if needed, unfortunately |
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| 284 | you have to supply the correct absolute path here due to CUPS |
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| 285 | internals, or put the pykota executable into /usr/lib/cups/filter |
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| 286 | instead of into /usr/bin. |
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| 287 | |
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| 288 | Do this for each ppd file present in this directory if you want |
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| 289 | to enable quota on every printer. |
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| 290 | |
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| 291 | WARNING : In the case you've got a non-postscript printer, chances |
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| 292 | are that the *cupsFilter is already filled-in and points |
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| 293 | to cupsomatic or such a print filter. In this case please |
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| 294 | check if you can switch your printer to PostScript mode |
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| 295 | or if there's a way to make it accept PostScript jobs. |
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| 296 | If yes then ensure that your workstations uses a PostScript |
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| 297 | printer driver, and replace the *cupsFilter line with the |
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| 298 | one pointing to the pykota filter. This should work, but |
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| 299 | is currently untested. |
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| 300 | If your printer really needs the original *cupsFilter line |
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| 301 | then you may not be able to use PyKota easily for now. |
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[695] | 302 | |
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[952] | 303 | - LPRng Print Backend : |
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| 304 | |
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| 305 | Modify the /etc/printcap file to add two lines identical to these ones : |
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| 306 | |
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| 307 | :achk=true |
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| 308 | :as=|/usr/bin/pykota |
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| 309 | |
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| 310 | For each printer on which you want to use print accounting. |
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| 311 | |
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[716] | 312 | Add printers and users to the quota system and set their quota values : |
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[695] | 313 | |
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[1086] | 314 | $ edpykota --add -P hp2100 -S 40 -H 50 user1 ... userN |
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[724] | 315 | |
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[725] | 316 | launching edpykota without any argument or with the --help |
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| 317 | command line option will show you all the possibilities. |
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[1086] | 318 | |
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| 319 | by default, each user is limited by "quota", this means that on |
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| 320 | each printer he can have a different soft and hard limit. |
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| 321 | You may want to limit the user by his account balance value, |
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[1107] | 322 | in which case, the print quota is shared between all printers |
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[1086] | 323 | instead of being different. To do this, use the following : |
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| 324 | |
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| 325 | $ edpykota --add -P hp2100 --limitby balance --balance 10 user1 ... userN |
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| 326 | |
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| 327 | This will put 10 $ (or Euros, PyKota doesn't care) on each user's account |
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| 328 | balance, and tell PyKota to limit them by their account balance value. |
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| 329 | Whenever they print on any printer, their account balance value is |
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| 330 | decreased by an amount which depends on the particular price per page |
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| 331 | and per job that you may have defined on the printer with edpykota's |
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| 332 | --charge command line option. |
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[1107] | 333 | Soft and Hard limits are not used if "--limitby balance" is used, |
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| 334 | but you can define a "poorman"'s threshold in /etc/pykota/pykota.conf |
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| 335 | to obtain a similar result (warning message when quota is low). |
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[695] | 336 | |
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[990] | 337 | Restart CUPS or LPRng, for example under Debian GNU/Linux systems : |
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[695] | 338 | |
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[725] | 339 | $ /etc/init.d/cupsys restart |
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[990] | 340 | |
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| 341 | or : |
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| 342 | |
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| 343 | $ /etc/init.d/lprng restart |
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[695] | 344 | |
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| 345 | Your users now should be able to print but not exceed their |
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| 346 | printing quota. |
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| 347 | |
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[1149] | 348 | To see printer quota usage, you can use : |
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[794] | 349 | |
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| 350 | $ repykota --printer lp |
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| 351 | |
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| 352 | or : |
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| 353 | |
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| 354 | $ repykota |
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| 355 | |
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| 356 | which will print quota usage for all users on all printers, |
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[1107] | 357 | along with totals, if you are the root user. If you are |
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| 358 | a regular user, only your own quota report will be produced. |
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[794] | 359 | |
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[1107] | 360 | Quota reports are also available remotely by using the CGI script |
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| 361 | printquota.cgi provided in the cgi-bin/ subdirectory. |
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[990] | 362 | |
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[980] | 363 | For different security concerns, please give a look at the SECURITY |
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| 364 | file which is part of this software. |
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[741] | 365 | |
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[695] | 366 | ============================================================ |
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| 367 | |
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[958] | 368 | Mailing list : |
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| 369 | -------------- |
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| 370 | |
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| 371 | A mailing list is dedicated to Pykota, you can subscribe to it |
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| 372 | or consult its archives at : |
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| 373 | |
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| 374 | http://cgi.librelogiciel.com/mailman/listinfo/pykota |
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| 375 | |
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| 376 | ============================================================ |
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| 377 | |
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[1107] | 378 | Please e-mail bugs to the mailing list at : pykota@librelogiciel.com |
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| 379 | or to the main author at : alet@librelogiciel.com (Jerome Alet) |
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