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• How can I use a CanoScan N640Pex scanner over a USB/parallel cable?

  - by detly

  I have an old CanoScan N640Pex flat bed scanner and a USB-to-parallel port cable through which I can connect it to my PC. Unfortunately neither Simple Scan nor XSane detect the scanner. I'm running Ubuntu 12.04 (plus updates and backports) with kernel 3.2.0-31-generic. dmesg tells me this when I plus the cable in: [256411.641910] usb 7-1: new full-speed USB device number 10 using uhci_hcd [256411.872392] usblp0: USB Bidirectional printer dev 10 if 0 alt 1 proto 2 vid 0x067B pid 0x2305 [256411.872417] usbcore: registered new interface driver usblp lsusb shows this device for my cable: Bus 007 Device 010: ID 067b:2305 Prolific Technology, Inc. PL2305 Parallel Port The device node created is /dev/usb/lp0 crw-rw---- 1 root lp 180, 0 Sep 9 17:46 /dev/usb/lp0 There is no extra information from any of these commands when I attach the scanner to the cable and power it on, though. I suspect I might need to change something in /etc/sane.d/canon_pp.conf, but I have no idea what to put for the ieee1284 line, since there is pretty much zero documentation for that parameter. So how can I get it to work?

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• How to run ubuntu-tweak's janitor automatically?

  - by Eliran Malka

  My aim is to have the janitor running at startup, with a pre-configured profile (e.g. clear redundant packages and browser cache). The website is lacking any documentation or usage instructions, and I could not find any information on this here as well. I tried, naturally, to start ubuntu-tweak from the command line, hoping additional API exists that will come through in this (allegedly) simple task. I only got as far as: ubuntu-tweak -f janitor which is a step in the right direction, but what's still missing is a command for the clear action. Is such a command available, or is there any better way of achieving the desired behavior?

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• Flowmotion Running on Ubuntu Server [migrated]

  - by Thomas Egan

  I am trying to configure Flowmotion to work on my Ubuntu Server. At present I use LAMP to serve pages from a Virtualbox installation. I will be moving this to a dedicated server but would like to enable true streaming of videos using this installation. I am only interested in open source streaming for a research project and although I have installed Flowmotion via apt-get I don't know how to start the service so that embedded videos located on the server will stream. Can anybody provide any information regarding this or online resources I may have missed? I have checked the documentation however if appears far too complex. Just clarify I'm running VirtualBox 4.2.1 on Mac OSX 10.6.8 and Ubuntu Server 12.06 64-bit

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• Accélérateur Windows 8 : Microsoft lance un programme de coaching pour aider à créer des applications pour son futur OS

  Accélérateur Windows 8 : Microsoft lance un programme d'accompagnement et de coaching Pour aider les développeurs à créer des applications pour son nouvel OS Pour accompagner l'arrivée de Windows 8, Microsoft a mis au point un programme d'aide et de suivi pour les développeurs. Entièrement gratuit, ce programme est baptisé « L'Accélérateur ». Au menu, des séances de coaching avec des experts, l'accès à tous les outils (téléchargement de ressources de conception pour les applications de style Metro, d'extraits de code et de template d'appli Metro, etc.) et aux ressources nécessaires (product guide for developers, documentation officielle, etc.) pour développer des ap...

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• How to remove "Search and launch"?

  - by user38489

  Is it possible to remove the "Search and launch" whateveritis from my "desktop"? I've actually tried both Desktop and Netbook modes, but it stays there in both of them. I'm not afraid of editing files in the ~/.kde dir, but I would be really disappointed if this is the only way to do it. [more details/rants] I was able to wipe out several things but I've ended up with a black window that's movable (Alt-click) but not removable. Beside being surprised by the performances, I find Kubuntu extremely unfriendly, and I can't find the logic behind the items of the interface. I've tried to search for documentation, but what I've found is not updated and doesn't include the Netbook interface.

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• what is the Best way to learn object oriented principles

  - by Mike

  I am interesed in OOP principles and i found lots of documentations and books about it, for instance in C++, Java, .NET, PHP and so on, but if i only want to learn OOP principle, differences and not in language, what can i do? i want a good documentation, not just like a whole book about something except OOP :) specific answers, how it works, main features, pictures, or videos, or forum, or even stack... in every time I began studying i read a whole history of programming, computer science, software development and bla bla... i need specific answers, if it is possible i really need to learn, i need examples and exercises thanks in advance

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• How do I suppress the "New release '12.10' available" message?

  - by cjm

  When I ssh into my Mythbuntu box, I get this message: Welcome to Ubuntu 12.04.1 LTS (GNU/Linux 3.2.0-32-generic x86_64) * Documentation: https://help.ubuntu.com/ New release '12.10' available. Run 'do-release-upgrade' to upgrade to it. Last login: <redacted> $ But I don't intend to upgrade to 12.10, because Mythbuntu recommends using LTS releases only. How do I suppress the "New release '12.10' available" message? I don't want to be notified until the next LTS release is available. I've already gone to Update Manager Settings Updates and selected "Notify me of a new Ubuntu version: For long-term support versions", but that didn't get rid of this message.

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• Is there a consolidated API reference for the Firefox browser.xul?

  - by cxw

  I have used Greasemonkey many times and am stepping up to Firefox extension development. Is there a consolidated reference for the variables, functions, and anything else that is available to overlays on browser.xul? Besides gBrowser, I note from the source that there are at least gNavToolbox, gURLBar, and gNavigatorBundle and would like more information about what services they provide. I have looked through the XUL School and XUL Tutorial on MDN, searched MozillaZine, and browsed the Jetpack documentation without finding anything but references to gBrowser. I have also looked at the code snippets referenced elsewhere (e.g.) and found specifics, but nothing that puts all the information together in one place. Is there such a reference?

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• OutOfBounds Exception when creating a PolygonShape using jbox2d

  - by B3nGr33ni3r

  So here's the deal, i'm parsing a file that contains the vertices for a polygon, that i want to create in box2d. I create a new PolygonShape() and then call .set() giving it a defined array of Vec, and that defined array's .length property. I expected this to work, since the documentation for jbox2d says this method takes a Vec array, and the count of Vec objects in that array. However, it errors out, and it seems to be unrelated to my code. The error i get is Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 8 at org.jbox2d.collision.shapes.PolygonShape.set(PolygonShape.java:174) and, upon looking at that line in the jbox2d svn repository, i still cannot figure out the issue. Any help is appreciated!

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• What kind of authorization I should use for my facebook application

  - by JSmith

  I am building a social reader Facebook application using Django where I am using Google Data API (Blogger API). But I am unable to deal with the authorization step to use the API (currently using ClientLogin under development). I tried to read the OAuth documentation but couldn't figure out how to proceed. I don't want my users to provide any login credentials for google.. which makes the app completely absurd. So, can anyone help me on my project and tell me what kind of authorization I should actually use and how ? (I am using gdata lib)

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• How to make Facebook like button narrower than 225px?

  - by tog22

  I'm generating a like button with Facebook's 'standard' layout for my site via https://developers.facebook.com/docs/reference/plugins/like/ . I've set its width to 200 pixels, but notice that setting it to lower than 225 pixels has no effect, and the documentation on that page indeed specifies 225px as the minimum width for the standard layout. Unfortunately I need to make it 200 pixels wide to fit my site's design. Is there any way to force it into this width? (The site's at http://gwwc2.centreforeffectivealtruism.org/ if you want to have a play with Firebug, though the like button gets generated by javascript so you'd probably have to duplicate that page and edit its source.)

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• OpenStack + Ubuntu 12.04

  - by csgeek

  Supposedly openstack can be installed easily under Ubuntu 12.04 LTS. I've installed 32 and 64bit versions of Ubuntu Server with the same behavior. sudo tasksel check OpenStack hit Okay then I get a tasksel: aptitude failed (100) I've seen: http://www.hastexo.com/resources/docs/installing-openstack-essex-20121-ubuntu-1204-precise-pangolin and https://github.com/EmilienM/doc-openstack documentation, but I was hoping that since it was an LTS released and it was an option in tasksel that I was simply overlooking something obvious and it's just a matter of selecting the right checkbox and hitting okay. Too much wishful thinking?

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• Security for LDAP authentication for Collabnet

  - by Robert May

  In a previous post, I wrote about how to get LDAP authentication working in Collabnet. By default, all LDAP users are put into the Users role on the server.  For most purposes, this is just fine, and I don’t have a way to change this.  The documentation gives hints that you can add them to other roles, but for now, I don’t have the need. However, adding permissions to different repositories is a different question. To add them, go to the repositories list, select Access Rules and then you can enter in their username, as it sits in Active Directory to the lists for the repositories or for the predefined groups that you have created.  To my knowledge, you cannot use the Active Directory groups in collabnet, which is a big problem.  Needing to micromanage users really limits the usefulness of the LDAP integration. Technorati Tags: subversion,collabnet

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• Modelio passe en version 2.1.1, l'outil de modélisation augmente son ouverture à l'open source

  Modelio passe en version 2.1.1 L'outil de modélisation augmente son ouverture à l'open source Modelio, l'outil de modélisation pour le développement de logiciels, la gestion de processus métiers et l'ingénierie des systèmes, passe en version 2.1.1, et accentue son ouverture open source. Modelio est par exemple désormais disponible nativement en format 64 bits ou 32 bits sous les différentes plateformes Linux RedHat, Ubuntu et Debian et gère la documentation Libre Office (en plus du HTML et de Microsoft Word). Résultat de plus de 20 ans de développement propriétaire, l'environnement open source Modelio 2 est disponible sous licence GPL v2 et est doté d'une architecture modulaire, d...

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• Linux OpenGL programming, should I use GLX or any other?

  - by pahnin

  I'm new to OpenGL and found that there are a lot of libraries to do that in C, and I also found that glx is most friendly with Linux X Server, I just want to do basic stuff, and I cannot find any tutorials for GLX. Is GLX a bad thing? I just want to do some small graphical things without installing many libraries and getting confused. Can anyone suggest me something which has tutorials and simple to compile? I found a link with an example with GLX and it worked perfect with no errors: anyone please suggest where I can find nice documentation or any better libraries.

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• Getting Started Quickly

  - by Owen Allen

  If you're interested in using Ops Center, you'll want to get up and running as quickly and effectively as possible. One way to do this would be to work your way through the documentation library - use the Linux or Oracle Solaris install guides, then go through the Feature Guide and Admin Guide to start using the software. They're thorough, but they're a lot of reading. But if you're looking to install a simple deployment quickly, and you don't want to do all of the configuration work right off the bat, you can use the Quick Start Guide. It's a streamlined procedure that runs you through installing a single Enterprise Controller and co-located Proxy Controller, and then shows you how to discover assets quickly. Once you've discovered these assets, it describes how to use the analytics feature to view their performance, and use monitoring to keep track of their statuses and health. You'll have to do some additional configuration to use features like OS provisioning, OS updates, and virtualization, but the Quick Start guide gives you an overview of how to install and start using features quickly.

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• How to learn an API

  - by inovaovao

  When I find some interesting project (e.g. on GitHub) I often would like to use it and try it out to see how it works, but if there isn't a good documentation or some kind of tutorial it's hard to figure out how to use it. So my question is: how do you approach such a situation? How do you figure out which classes are important and how to chain them to put them to use? What would you look at first? An advice I found is to look at the tests (if there are any). But if there are unit tests for every class, how do you know which ones to look at first?

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• Will GMails Greasemoney API help me: composing and sending messages, adding a button to the compose view, listing and sending drafts [migrated]

  - by Kent

  I want to create a Greasemonkey script for GMail and I've browsed through the GMail Greasemonkey 1.0 API documentation. I haven't fully understood what the API actually provides, which leads me to ask a few concrete questions. How will the API help if I want to: Add a button to the Compose view which executes some of my code. Compose and send a new message from scratch. List the current drafts. Pick a draft and send it. From what I can see it'll help me with 1 above, but I don't see any real interaction API parts which can help me with 2-4.

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• La page des binaires Qt mise à jour : plus facile à lire, elle héberge aussi les binaires de bibliot

  Bonjour, Vous avez déjà essayé de compiler Qt. Beaucoup y arrivent, mais cette opération prend un certain temps. D'autres n'y arrivent pas, et abandonnent le framework. Aujourd'hui, nous vous présentons une solution : les binaires prêts à l'emploi. Il vous suffit de les télécharger, d'y appliquer un patch, et c'est prêt ! À vous les joies de Qt ! Actuellement, voici les quelques binaires disponibles : la version 4.5.2, la dernière stable, pour Visual Studio 2008, et la toute dernière Technology Preview de la version 4.6, pour Visual Studio 2008 et GCC 4.4. Tous les paquets incluent la documentation, les démonstrations, les exemples, et les sources : pas besoin de télécharger d'autres fichiers, tout ce dont vous pourriez avoir besoin ...

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• Dual monitor Unity launcher opening on wrong monitor in 11.10

  - by user26381

  I just upgraded to Oneiric and now the Unity Dash launcher is on my left screen. I really want it on my right screen. But how do I do that? Why do I want the Dash on my right screen? My left screen is a smaller older monitor that I use to read/watch documentation or keep my music player open. I work on my right screen, that is bigger and is a better monitor. I have an Nvidia card and in the nvidia settings it is setup that the right monitor is my primary monitor, but Oneiric doesn't follow this setting anymore. I thought this was a bug, but is seems to be intended behavior... https://bugs.launchpad.net/ubuntu/+source/unity/+bug/742544 Some poster in this thread explains that he "patched it locally", but I have no idea how to do this. Does somebody know how to do this? Or maybe there is another solution?

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• Preparing to release code as open-source

  - by Raphael

  I have developed a fully functional tool which I would like not only to share with anyone interested but also get support from the community. This tool is cross-platform, written in C++ with Qt, the code is well commented but I still lack any documentation. There are also some small issues and improvements to be made before I can call it a stable, final version. What are the first steps that I have to take to release code as open-source and attracting people interested in contributing? This is my first serious attempt to release open-source code and I really don't know where to start. Should I just push it to Github put together a small wiki and pray for the best?

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• How quickly does a language get outdated?

  - by Dummy Derp

  I started learning Java recently. I started learning it using books that I picked up from the library, some that I bought, and here and there from Java documentation. The book that I use for Java was published in the year 2011. In 2012, Java8 will be released followed by Java9 in the year 2013. The questions are: How do I keep myself updated about developments in Java without having to buy a tome for Java8 and/or Java9 Is a book published in 2008 an outdated book for studying JSP and Servelets? I'm talking about Head First Servlets and JSP

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• Windows 7 Climbing the Charts, Fights for Market Share

  Microsoft has to fight with competitors in various industries for market share whether it be in computing video games or portable media devices just to name a few. The story is no different within the cell phone industry either. Within this particular mobile arena the main enemies for Microsoft are RIM Apple and Google Android. Microsoft is lagging a bit among the competition as things currently stand but they hope that will change in the near future.... Transportation Design - AutoCAD Civil 3D Design Road Projects 75% Faster with Automatic Documentation Updates!

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• In what cases should I install (and configure) Postfix as a desktop user?

  - by Gonzalo

  Possible cases: 1) I plan to do Debian packaging (this case is the motivation since postfix gets installed as a dependency of some development packages, so it means that in such a case might be necessary). 2) I plan to use Evolution and a Internet provider mail account. 3) I plan to use gmail. Surely if I read Postfix documentation I may find the answer, but its huge and couldn't find it. In any case how (or where) should I find the answer to a question like that by myself? (I really tried)

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• How do you combat programming fatigue?

  - by Karpie

  Not fatigue as in 'I need sleep' but fatigue as in 'I just can't be bothered anymore' which usually sets in when you hit roadblocks in whatever project you're working on, generally the closer you get to deadlines. It can be in work projects or personal projects, but it's something I keep hitting more and more lately. I'll get an idea, get into working on it, have a few really good days and make progress, then just some niggly things will trip me up, I can't get things working the way you want, I've hit limitations in the framework, I've got problems I can't find documentation for, etc. and it just gets too frustrating. Or am I alone in this?

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