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• Why does apt-get keep waiting for headers on Oracle repository?

  - by hughdbrown

  I have this at the end of my /etc/apt/sources.list to retrieve Oracle code: deb http://oss.oracle.com/debian unstable main non-free When I run sudo apt-get update, the app gets stuck displaying this message: 100% [Waiting for headers] If I remove this, apt-get update runs without error. Is there a new, recommended URL for Oracle products and, generally, how do you fix this problem? I am pretty sure this did not happen on 11.10 and has only started with the move to 12.04. I have seen these answers and they do not help: apt-get update stuck on "Waiting for Headers" http://ubuntuforums.org/showthread.php?t=1689579 http://muffinresearch.co.uk/archives/2010/03/30/linux-fix-for-apt-get-update-waiting-for-headers/ http://www.kubuntuforums.net/showthread.php?57567-Ubuntu-problems-on-update

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• Community Forum at Openworld - Presentations available

  - by Javier Puerta

  Thanks to all of you who participated at the Exadata & Manageability Partner Community session that we ran during Oracle Openworld in San Francisco. Very special thanks to the partner speakers who shared their experiences with the rest of the community! Presentation On October 1st we held a new session of the Exadata & Manageability Partner Community in San Francisco. Thanks to all of you who participated in the event and very especially to the partner speakers who shares their experiences with the rest of the community: Francisco Bermúdez (Capgemini Spain), Dmitry Krasilov (Nvision, Russia) and Miguel Alves (WeDo Technologies, Portugal)The slide decks used in the presentations are now available for download at the Exadata Partner Community Collaborative Workspace (for community members only - if you get an error message, please register for the Community first).In a few weeks we will be announcing the location for the next Community event in the spring timeframe.

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• How to completely uninstall LXDE (12.04)?

  - by Jeremy Lunsford

  I'm trying to remove LXDE from my 12.04 system. I've tried running the following commands (as root from a terminal): apt-get remove lxde apt-get purge lxde apt-get autoremove I've also tried a rather lengthy command that was linked to from another question. However, when I log in, LXDE is still presented as an environment choice, and it still functions perfectly well, as if I've done nothing. I ran the above commands again, but got the following message: package . . . is not installed, so not removed. So, where do I go from here, short of re-installing Ubuntu and all my programs?

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• Sortie de GNOME 3.6 Beta : tiroir de notifications repensé, GTK+ 2 augmenté et intégration de Kerberos

  Sortie de GNOME 3.6 Beta Tiroir de notifications repensé, GTK+ 2 augmenté et intégration de Kerberos L'équipe du projet GNOME a annoncé la sortie de GNOME 3.5.90, une version transitoire qui représente la première Beta de la 3.6, prévue pour fin septembre. C'est en fait la dernière étape pour apporter de nouvelles fonctionnalités ou changements avant la stabilisation du code, qui concentrera exclusivement les efforts sur la correction de bugs. On énumère un changement majeur dans le tiroir des notifications (message tray). À présent, les utilisateurs doivent l'invoquer manuellement, au lieu d'avoir une apparition automatique lors de chaque notification entrante. Le tiroir du Shel...

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• Nameserver Problem

  - by CrazyCodeZ

  I recently bought a new VPS , and i was trying to set private nameservers in my domain cpanel. I went ahead and added 4 A records ns1.mydomain.com - points to my ip ns2.mydomain.com - points to my ip www.mydomain.com - points to my ip mydomain.com - points to my ip and changed the nameservers to ns1 & ns2.mydomain.com the problem is that now while typing www.ns1.mydomain.com and www.ns2.mydomain.com in browser it points to the correct IP address but the www.mydomain.com is saying an Error The webpage at http://demiracles.com/ might be temporarily down or it may have moved permanently to a new web address. Error 137 (net::ERR_NAME_RESOLUTION_FAILED): Unknown error. Error message in chrome is above. Please help me.

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• Print jobs to Epson Stylus Photo 640 all stopped after upgrade 10.04 to 12.04

  - by Tessa Sayers

  Upgraded from Ubuntu 10.04 to 12.04 on 19th oct 2012. Now all print jobs end up in the print queue with the label "Stopped". Reinstalled the printer driver - it is gutenberg 5.2.8 pre1. Looking at "http://localhost:631/jobs" shows an error message by each stopped job as follows:"The PPD version (5.2.5 Simplified) is not compatible with Gutenprint 5.2.8-pre1." Found a long bug-fixing history in bugs.launchpad.net which seem to imply that this problem has been fixed. It seems to be a problem with the installation not updating the ppd files. Is there any workaround to fix this problem?

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• Why can't I mount the Ubuntu 12.04 installer ISOs in Mac OS X?

  - by eric

  Over the past few days, I have downloaded both the 32 and 64 bit version of server and desktop to install on an Intel based PC. It is normal from within OS X to double click on an ISO and it will mount the ISO in the finder as well as within disk utility. When I attempt to mount any of the Ubuntu ISOs I downloaded, OS X returns the error message The following disk images couldn't be opened. The reason given for the error is no mountable filesystem. However, I am still able to open the ISO directly from disk utility and burn it to a DVD/CD. What has changed in this release to cause this? Is there something wrong with the current ISOs? The OS X machine I am using is only two weeks old and is having no issues with any other ISO.

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• frequency out of range - please change display mode

  - by Dave

  I just downloaded the latest version of the Ubuntu live CD, and have installed it on a desktop computer (a Fujitsu Scaleo P). Once installed it seems to work perfectly, although there are some updates recommended in the Update Manager. My problem is that, after having installed these updates and restarted the computer, I get this message on my monitor, and no Ubuntu interface is visible: frequency out of range - please change display mode I do not know how to change this when I can't access an interface. Is there a command that will bypass trying to boot the GUI and let me change the display mode via a CLI? I am brand new to Ubuntu and any help on this would be much appreciated.

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• What are the caveats of the event system built on Messenger rather than on classic .NET events?

  - by voroninp

  MVVM Light and PRISM offer messenger to implement event system. the approximate interface looks like the following one: interface Messanger { void Subscribe<TMessageParam>(Action<TMessageParam> action); void Unsubscribe<TMessageParam>(Action<TMessageParam> action); void Unsubscribe<TMessageParam>(objec actionOwner); void Notify<TMessageParam>(TMessageParam param); } Now this model seems beneficial comparing to classic .net events. It works well with Dependency Injection. Actions are stored as weak references so memory leaks are avioded and unsubscribe is not a must. The only annoyance is the need to declare new TMessageParam for each specific message. But everything comes at a cost. And what I'm really worried about is that I see no shortcomings of this approach. Has anoyne the experience of some troubles with this design pattern?

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• why my system gets frozen?

  - by user93019

  Is now something like 2 weeks since my system gets frozen while browsing the web, using apps, watching videos on web sites, basically using any part of my netbook, even when i'm only using one program (like the web browser) this happens. Is so frozen, that the only option i have left to do is to PRESS and hold the power button, nothing else works; I have seeing an error message telling me about a "compiz" error, but not all the times, and this happens every day, some times 2 or 3 times, during the same day. Why does this happens? how can i fix it? please help. Just to let you know i have my system up to date on 12.04 32 bits version, working on an Acer aspire AOD257, 1 Gb RAM, Intel® Atom™ CPU N570 @ 1.66GHz × 4 .

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• VS2012 Launch Event &ndash; Combating Bugs And Poor Performance In Production

  - by Tarun Arora

  I presented a session “A techies guide to combating bugs & poor performance in production” at the Microsoft IT Visual Studio Launch event.  The key message was to demonstrate what common production issues (non-reproducible bugs and poor performance) techie’s run into and how the tooling in Visual Studio can help you efficiently tackle these issues. Remember, a Techie without efficient tools is only half the good!                                                       A techies guide to combating bugs & poor performance in production from Avanade Enjoy!

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• There was an error getting information about "/" while copying to desktop

  - by user206320

  Currently running Ubuntu 13.10 after a fresh install/re install due to this problem. The error occurs whenever I try to drag a file from the Ubuntu search( in the launcher ), to the desktop. the whole error message is as follows... "Error while copying. There was an error getting information about “/”." Show more details reveals the following... "The specified location is not supported" I don't understand the problem and can't see any clear way of fixing it. Any and all advice would be appreciated. :)

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• Apple met en ligne la mise à jour 10.6.3 pour Mac OS X,qui contient de nombreux correctifs

  Apple propose ce soir la mise à jour pour Mac OS X 10.6. Après avoir envoyé de nombreuses bêta aux développeurs, la voici enfin avec de nombreux correctifs : Améliorent la fiabilité et la compatibilité de QuickTime X. Corrigent des problèmes de compatibilité avec les applications basées sur OpenGL. Corrigent un problème d'affichage incorrect des couleurs d'arrière-plan de message dans Mail. Corrigent un problème qui empêchait les fichiers dont le nom contenait les caractères "#" ou "&" de s'ouvrir dans les applications Rosetta. Corrigent un problème qui empêchait la copie de fichiers sur des serveurs de fichiers Windows. Améliorent les performances de Logic Pro 9 et de Main Stage 2 en mode 64 bits.

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• The application compiz has closed unexpectedly

  - by suhaas

  I have installed Ubuntu 12.10 on my desktop. (Pentium 4, 80 GB hard disk, 2 GB RAM, 32-bit CPU.) And I have installed Windows XP. I made a 40 GB partition for windows and 40 GB for Ubuntu. I installed Ubuntu and it said "installation is complete" and asked me to restart. I restarted the PC and logged in. After 1 minute I get a message like this: The application compiz has closed unexpectedly. Then I closed it. After that it just stays in blank screen nothing shows up. What should I do?

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• 12.10 Grub-customizer error

  - by SteveK

  I am trying to use grub-customizer in 12.10 which ran in 12.04. I now get error grub-mkconfig couldn't be executed successfully. error message: Generating grub.cfg ... Found linux image: /boot/vmlinuz-3.5.0-18-generic Found initrd image: /boot/initrd.img-3.5.0-18-generic Found linux image: /boot/vmlinuz-3.2.0-32-generic-pae Found initrd image: /boot/initrd.img-3.2.0-32-generic-pae Found linux image: /boot/vmlinuz-3.5.0-18-generic Found initrd image: /boot/initrd.img-3.5.0-18-generic Found linux image: /boot/vmlinuz-3.2.0-32-generic-pae Found initrd image: /boot/initrd.img-3.2.0-32-generic-pae Found memtest86+ image: /boot/memtest86+.bin Found memtest86+ image: /boot/memtest86+.bin Found Windows Recovery Environment (loader) on /dev/sda1 Found Windows 7 (loader) on /dev/sda2 I have removed and reinstalled it to no avail. steve@steve-Ubuntu:~$ grub-mkconfig --version grub-mkconfig (GRUB) 2.00-7ubuntu11 I also noticed that file device.map does not exits but in other forums read that it is not in 12.10. Help please

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• How do I change local display resolution via SSH?

  - by krumble1

  I have a machine running Ubuntu Server 12.04 LTS and I'm having problems with the local monitor. The Dell flat panel I'm using only displays this message while the computer running: "Cannot Display This Video Mode" and then the information: "Optimum resolution 1280x1024 60Hz". I'm fairly new to using an operating system wholly via command line but I'm learning fast. :) I can access the server fine via SSH so using it is not a problem. However, for where it is positioned at the moment, it would be much more convenient to use the computer locally. I'm just wondering how to change the local screen resolution via SSH to something usable by my monitor. Thanks for your time! BTW: I have also tried switching displays and I still have the same problem. Also BTW: I tried putting in the xrandr command and all I get back is: Can't open display

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• How to clean launch a GUI app via the Terminal (so it doesn't wait for termination)?

  - by Peter.O

  Some GUI apps launch cleanly via the Terminal command line. Some don't, and they cause the Terminal to wait for the app to terminate. ...and even then, some don't "release" the command line. The mysterious ampersand "&" suffix, seems to cause the terminal to put the process into the background... (but I'm not sure what happens there). Is there a way to launch an app via the Terminal, so that there is no "hang on" effect? ... just like launching something via F2. I'd like to have the command line available again, immediately (without something still in the background and writing out system message in the terminal).

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• Instantiating Interfaces in C#?

  - by RealityDysfunction

  I am reading/learning about interfaces in C# at the moment, and thus far I managed to understand how it differs from an abstract class. In the book I am reading the author explains that interfaces are the ultimate abstract class and that it simply sets the standard of certain methods the inheriting class will have, but then provides the following example... static void Main(string[] args) { ... Circle c = new Circle("Lisa"); IPointy itPt = null; try { itPt = (IPointy)c; Console.WriteLine.(itPt.Points); } catch (InvalidCastException e) { Console.WriteLine(e.Message); } ... } The line that absolutely throws me off is the "IPointy itfPt=null;" did he just declare an interface??? I thought interfaces are abstract and can only be inherited? What kind of sorcery is going on here? Thanks for any help, I

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• C# Image Download

  - by Nouman Zakir

  A C# class that makes it easier to download images from the web. Use the following code in your program to download image files such as JPG, GIF, PNG, etc from the internet using WebClient class. using System;using System.Drawing;using System.Drawing.Imaging;using System.IO;using System.Net;public class DownloadImage { private string imageUrl; private Bitmap bitmap; public DownloadImage(string imageUrl) { this.imageUrl = imageUrl; } public void Download() { try { WebClient client = new WebClient(); Stream stream = client.OpenRead(imageUrl); bitmap = new Bitmap(stream); stream.Flush(); stream.Close(); } catch (Exception e) { Console.WriteLine(e.Message); } } public Bitmap GetImage() { return bitmap; } public void SaveImage(string filename, ImageFormat format) { if (bitmap != null) { bitmap.Save(filename, format); } }}

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• after login, the desktop remains blank.

  - by MobileDev123

  Hi, I have installed Ubuntu 10 last night and finished all upgrading stuff, in the time when updates are applied I downloaded a torrent file. As soon as download is finished I rebooted my system. As usual at start up it asked my login and I did the same. After a successful login It should show me the desktop, or show an error message in case anything has gone wrong. But what I had is only a cursor and a blank wall paper. Can anybody tell me what is the problem and how to resolve this? Thanks

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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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• Best Practice to return responses from service

  - by A9S6

  I am writing a SOAP based ASP.NET Web Service having a number of methods to deal with Client objects. e.g: int AddClient(Client c) = returns Client ID when successful List GetClients() Client GetClientInfo(int clientId) In the above methods, the return value/object for each method corresponds to the "all good" scenario i.e. A client Id will be returned if AddClient was successful or a List< of Client objects will be returned by GetClients. But what if an error occurs, how do I convey the error message to the caller? I was thinking of having a Response class: Response { StatusCode, StatusMessage, Details } where Details will hold the actual response but in that case the caller will have to cast the response every time. What are your views on the above? Is there a better solution? ---------- UPDATED ----------- Is there something new in WCF for the above? What difference will it make If I change the ASP.NET Web Service to a WCF Service?

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• phishing attack. Where do I start the cleanup?

  - by Suz

  I'm a newbie webmaster. I've got a domain and a site... and no clue about the web (I'm OK with files and programs... ) I got a message from google that my site is a possible phishing site, with a link the the suspect page: http://www.mydomain.com/~phishers/Paypal/us/Confirm.php needless to say, I didn't put that up. Can someone point me to a good tutorial on what to do now? I'd like to figure out what happened so I can defend against it the next time around. How do I identify what kind of attach this is? Also, what is the tilde doing in the URL path? I couldn't find any path like this on my hosting account, so I'm not entirely sure how to delete it.

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• Issues with external mounting after pysdm removed

  - by K. R. Huard

  So, I'm very new to ubuntu. I was having troubles getting my external hard drive to be read/write permission. It's owner is my macbook, and writing on the drive was repeatedly denied. In trying to sort this out, I tried the Nautilus commands (no success), installed the PYSDM application, changed some things (as suggested by this user in this forum http://askubuntu.com/a/113992 )but then found that I was getting an error message whenever I tried to mount an external storage device. The error is: Unable to mount DERPSTICK error mounting: mount exited with exit code 1: helper failed with: [mntent]: line 14 in etc/fstab is bad mount: only root can mount /dev/sdc1/ on /media/sdc1 Others with similar problems put their fstab up here, but I'm not sure how to bring it up, or if I should even try. Thanks for your time!

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• Daemon for moving files between partitions?

  - by RATHI

  I have a system with Ubuntu installed in 20GB and windows in 100 GB, two partitions - each of 100GB using NTFS. While using DC++ (multiple downloading of big file) I used to get message that system is running out of memory. Is there any way to make a deamon which will be checking the Ubuntu partition so that if its used space goes up to a certain amount (let's say 18 GB) it will automatically start a moving file from this drive to another drive (let's assume it will pick the file from movie folder or largest media file from this drive to move)? Or it prompt to ask from user which file to move? Is there any program which can do this for me? If not, can you suggest something to read so that I could make it?

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