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  • Keyboard layout issues using Ubuntu 12.04 in ssh via X11 for mac

    - by LostInTranslation
    I just upgraded from 10.04 LTS to 12.04 LTS on my server (DELL Intel XEON). By SSH login from my mac (OS X Lion) everything is fine (no issues with command lines) but when I open a window through X11, the keyboard layout is now completely messed up. As an owner of a french mac keyboard, I got used to such issues and could deal by guessing the "QUERTY" keys, but this time it's worse. To fix it, I tried: 1/ sudo dpkg-reconfigure keyboard-configuration = no effect 2/ sudo gnome-control-center then change the keyboard settings, however adding a couple of keyboard layouts did not change anything. I feel there is something to do with the X11 forwarding. Any hints? Thanks

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  • Mozilla reproche à Apple et Google de vouloir s'approprier le HTML5, tandis que Microsoft est félici

    Mozilla reproche à Apple et Google de vouloir s'approprier le HTML5, tandis que Microsoft est félicité pour son soutien de la technologie Christopher Blizzard, évangéliste Open Source chez Mozilla, tire à boulets rouges sur Apple et Google. Il accuse les deux firmes d'essayer de s'approprier le format HTML5 de manière déloyale, alors qu'elles ne sont pas les seuls à travailler à son développement. Apple d'abord, qui à publié sur son site des démonstrations des capacités de l'HTML5 réservées aux utilisateurs de Safari (il faut passer par l'onglet "développeurs" pour les visionner depuis un autre navigateur). "Tous les navigateurs ne les supportent pas", indique en bas de page le groupe à la pomme, ce qui laissera...

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  • What is the next promotion for a scrum master

    - by gnebar
    I'm currently a scrum master. I have been offered a promotion to a role that will allow me to have a wider impact. (more involved in company wide architectural decisions, possible secondment to kick start major projects, etc). The role and title of the job has yet to be decided but my company are open to guidance from me. I'm happy I can mould the role to suit me and the company but I'm unsure about the job title that fits this role. Technical Evangelist has been suggested but i'm not sure that is the correct title. I'm keen to proceed down the technical route. What would you suggest? What other roles do people take after scrum master/technical lead? EDIT: (I am aware that my current role is a mix of a technical lead and scrum master role, but that's how we do it in my company :) )

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  • What is a Histogram, and How Can I Use it to Improve My Photos?

    - by Eric Z Goodnight
    What’s with that weird graph with all the peaks and valleys? You’ve seen it when you open Photoshop or go to edit a camera raw file. But what is that weird thing called a histogram, and what does it mean? The histogram is one of the most important and powerful tools for the digital imagemaker. And with a few moments reading, you’ll understand a few simple rules can make you a much more powerful image editor, as well as helping you shoot better photographs in the first place. So what are you waiting for? Read on!  What is a Histogram, and How Can I Use it to Improve My Photos?How To Easily Access Your Home Network From Anywhere With DDNSHow To Recover After Your Email Password Is Compromised

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  • How do you show the desktop in a blink in Ubuntu?

    - by e-satis
    We know you can either click on the show desktop icon or use CTRL+ALT+D to ask Ubuntu to show the desktop. Unfortunately, this does not always show the desktop in one action. Sometime, and this is true for at least the last 4 version of the OS, it brings up first to the front all the windows, THEN, with a second click, show you the desktop. This is very annoying, as when you show the desktop it generally to quickly click on a shortcut. To understand what I'm talking about, open 7 windows, minimize some, bring some to the front, maximize one, then show the desktop. Then do that on Windows. You'll see the difference.

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  • Oh no! My padding's invalid!

    - by Simon Cooper
    Recently, I've been doing some work involving cryptography, and encountered the standard .NET CryptographicException: 'Padding is invalid and cannot be removed.' Searching on StackOverflow produces 57 questions concerning this exception; it's a very common problem encountered. So I decided to have a closer look. To test this, I created a simple project that decrypts and encrypts a byte array: // create some random data byte[] data = new byte[100]; new Random().NextBytes(data); // use the Rijndael symmetric algorithm RijndaelManaged rij = new RijndaelManaged(); byte[] encrypted; // encrypt the data using a CryptoStream using (var encryptor = rij.CreateEncryptor()) using (MemoryStream encryptedStream = new MemoryStream()) using (CryptoStream crypto = new CryptoStream( encryptedStream, encryptor, CryptoStreamMode.Write)) { crypto.Write(data, 0, data.Length); encrypted = encryptedStream.ToArray(); } byte[] decrypted; // and decrypt it again using (var decryptor = rij.CreateDecryptor()) using (CryptoStream crypto = new CryptoStream( new MemoryStream(encrypted), decryptor, CryptoStreamMode.Read)) { byte[] decrypted = new byte[data.Length]; crypto.Read(decrypted, 0, decrypted.Length); } Sure enough, I got exactly the same CryptographicException when trying to decrypt the data even in this simple example. Well, I'm obviously missing something, if I can't even get this single method right! What does the exception message actually mean? What am I missing? Well, after playing around a bit, I discovered the problem was fixed by changing the encryption step to this: // encrypt the data using a CryptoStream using (var encryptor = rij.CreateEncryptor()) using (MemoryStream encryptedStream = new MemoryStream()) { using (CryptoStream crypto = new CryptoStream( encryptedStream, encryptor, CryptoStreamMode.Write)) { crypto.Write(data, 0, data.Length); } encrypted = encryptedStream.ToArray(); } Aaaah, so that's what the problem was. The CryptoStream wasn't flushing all it's data to the MemoryStream before it was being read, and closing the stream causes it to flush everything to the backing stream. But why does this cause an error in padding? Cryptographic padding All symmetric encryption algorithms (of which Rijndael is one) operates on fixed block sizes. For Rijndael, the default block size is 16 bytes. This means the input needs to be a multiple of 16 bytes long. If it isn't, then the input is padded to 16 bytes using one of the padding modes. This is only done to the final block of data to be encrypted. CryptoStream has a special method to flush this final block of data - FlushFinalBlock. Calling Stream.Flush() does not flush the final block, as you might expect. Only by closing the stream or explicitly calling FlushFinalBlock is the final block, with any padding, encrypted and written to the backing stream. Without this call, the encrypted data is 16 bytes shorter than it should be. If this final block wasn't written, then the decryption gets to the final 16 bytes of the encrypted data and tries to decrypt it as the final block with padding. The end bytes don't match the padding scheme it's been told to use, therefore it throws an exception stating what is wrong - what the decryptor expects to be padding actually isn't, and so can't be removed from the stream. So, as well as closing the stream before reading the result, an alternative fix to my encryption code is the following: // encrypt the data using a CryptoStream using (var encryptor = rij.CreateEncryptor()) using (MemoryStream encryptedStream = new MemoryStream()) using (CryptoStream crypto = new CryptoStream( encryptedStream, encryptor, CryptoStreamMode.Write)) { crypto.Write(data, 0, data.Length); // explicitly flush the final block of data crypto.FlushFinalBlock(); encrypted = encryptedStream.ToArray(); } Conclusion So, if your padding is invalid, make sure that you close or call FlushFinalBlock on any CryptoStream performing encryption before you access the encrypted data. Flush isn't enough. Only then will the final block be present in the encrypted data, allowing it to be decrypted successfully.

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  • choppy sound with random popping 13.04

    - by Goddard
    I was hoping some one could help me figure out why my audio is popping randomly. I just got some new speakers and it was popping previously, but I was using monitor speakers so it wasn't really noticeable. Now I have some Bose speakers hooked up via an analog cable. It is not the speakers because my Android phone plays audio fine. When I open the sound settings window the popping happens at exactly the same time a third sound device is displayed very quickly and then disappears. This keeps happening at about 30 second intervals. Any help is appreciate. If you need more details just let me know how to get them.

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  • Oracle ADF Mobile is Now Available!

    - by Michelle Kimihira
    We are happy to announce availability of Oracle ADF Mobile, part of Oracle ADF (Application Development Framework). Oracle ADF is an HTML5 & Java-based framework that enables developers to build and deploy to iOS and Android devices from one application code base. By using open standards like HTML5 for a cross-platform consistent interface and Java for the application logic, companies can readily leverage existing skill and resources to develop mobile applications for iOS and Android.  There’s no need to learn a new platform specific programming language for each device.  With Oracle ADF Mobile -  you simply write once, deploy to many! Read the press release here.     On Wednesday, we will be featuring a blog on developing mobile applications and exploring the different options: Web, Native, or Hybrid. Additional Information Blog: ADF Blog Product Information on OTN: ADF Mobile Product Information on Oracle.com: Oracle Fusion Middleware Follow us on Twitter and Facebook Subscribe to our regular Fusion Middleware Newsletter

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  • Parsing a website's source

    - by Davlog
    I want to create an application and maybe upload it to the play store but I am not sure if that what my app does is legal or not. I am downloading a page's source from a website to get some information I need. For example if I download a page about the song "Ramble On" by Led Zeppelin and parse this page source to get the song's name, maybe a link to an image and the lyrics. Would that be illegal or can I display these information to my users without getting any problem? Also the website says it's an "open 'wiki-style' [...].It's completely user built by people like you and used every day by fans and developers alike."

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  • All Access Pass to Oracle Support

    - by Leslie-Oracle
    Untitled Document Looking for tips, recommendations and resources to help you keep your Oracle applications and systems running at peak performance? Want to find out how to get more out of your Oracle Premier Support coverage? More than 500 experts from across Services and Support will be on hand at Oracle OpenWorld to answer your questions and share best practices for adopting and optimizing Oracle technology. Find out what Oracle experts know about the best tools, tips and resources for supporting and upgrading Oracle technology. Attend one of our “Best Practices” sessions. Stop by the Oracle Support Stars Bar to talk with support experts. Open daily @ Moscone West, Exhibition hall 3161. See Oracle support tools in action at one of our demos. View the schedule of all of our Oracle Premier Support activities at Oracle OpenWorld for more information. See you there!

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  • cannot install build essential from Ubuntu 10.10 cd

    - by munir
    after a fresh installation of Ubuntu 10.10 i tried to install build-essential from the Ubuntu installation CD. I put the cd in the cdrom and in the software repositories i checked the box install from cd(Ubuntu 10.10 release Maverick Meerkat). Then i reloaded the software repositories. The synaptic manager then tried to download some repository related files but failed to do so as i didn't have internet connection. Then i open a terminal and wrote "sudo apt-get install build-essential". It prompted me if i want to install build essential y/N. I typed y but the terminal showed some errors and was not installed. I also tried to add the CD in the software repositories. I clicked add and it prompted me to insert a CD while the CD was still inside the cdrom. I clided "ok" then and it showed it could not find any cd. What is wrong ?

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  • What algorithms would suit image colour summarization? [on hold]

    - by codecowboy
    I would like to analyse a set of hundreds of thousands of product images (clothing, electronic goods etc) and retrieve the dominant colours in each. I'm only interested in the top 3 or 4 colours. The aim is to achieve a degree of certainty that x image is mostly red or image y is mostly orange and blue. The images are likely to be colour jpegs of reasonable quality and approximately 100kb in size. I would like to use C# and the solution should run on a Linux server, preferably using open source libraries. What image processing algorithms or techniques might help me achieve this?

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  • How do I reopen an instance window once it has disappeared from desktop?

    - by Mohamad
    I'm new to Ubuntu. I use Skype and often the main window just disappears from my desktop. The Skype instance itself is still running in the background. I know this because I can see its notifications on the bottom right side of the screen. If I click on the Skype icon again, Ubuntu will launch a new instance instead of maximizing the running instance. Of course this will not work because Skype will not let you sign in: Another instance of Skype may be running. How do I refocus/bring to the foreground the existing Skype instance? In Windows, you can restore running instances through the taskbar. I've tried cycling through open windows, but the running instance window is no where to be seen.

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  • What is the best way to implement paginated text editing in Python?

    - by W.F
    I'm trying to build a formatted text editor in python. I need the editor to be paginated on edit mode. Same as in all popular word processors - when the user is editing the document what he/she sees is a representation of the actual, physical, page. I've tried looking into PySide but I can't find any ready solution to this, nor I can work out a way to do it myself. I am totally open to new technologies, so if you think Python is not the right choice here I would love to hear about new stuff (especially when I'm this new to UI coding). It only needs to be cross-platform and let me do rapid development (hence me looking for an out-of-the-box solution to this). Please suggest the best way to implement this. Please also note that I am looking for either a ready solution or an advice on how to tackle this. Thank you very much !

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  • Know Thy Operating System?

    - by AdityaGameProgrammer
    As developers how much time, or do you spend time, In learning the hidden features tricks of your operating system ? How important do you feel is this for productivity in day to day programming? tasks. What do you mean when you list knowledge of an OS in your resume? What are your favorite hidden -less known features For example: A common problem of How can i open the cmd window in a specific location a do it yourself solution in say xp and what to do if something breaks Are these something you look into as and when you find the need to do so?

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  • Why is Lubuntu default desktop environment

    - by John
    So I just wanted to try things out on 14.04, so I did sudo apt-get install lxde sudo apt-get install lubuntu-desktop When I get to the greeter, it reads Lubuntu (Default) Lubuntu Netbook LXDE Openbox Ubuntu Why is Lubuntu default? I don't know if its because its the last thing I installed or if its because it is in alphabetical order. I'm tempted to test this theory by installing Xubuntu and see if it becomes default. I'd like it to read Ubuntu (Default) and have the Ubuntu splash instead. When I open lightdm.conf, there is no line "user-session" nor "greeter-session". They are missing. Is this normal and I have to add it manually?

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  • Why Ubuntu One pretends to sychronize files, but it doesn't?

    - by Tom Brito
    I have my Ubuntu One account configured in both Ubuntu 11.10 and iOS (ipod-touch). The photos from the iOS were successfully uploaded, but in Ubuntu One, although it shows the "syncing" and "synchronized" marks over the icons, the files are not showing in the website (one.ubuntu.com). In short: My files are not showing in the Ubuntu One website, although the icons have the "uploaded" mark. Any idea what can be wrong here? obs1: Also, not sure if it's related, the icon-marks will show only when I open the Ubuntu One Control Panel. It shows the message "file was uploaded", but there's nothing online. obs2: The folder I'm trying to synchronize is 30mb size. And my connection is 8mbps.

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  • Struck with a serious issue when upgrading to ubuntu 13.10 from 13.04

    - by Piyush Deshmukh
    I installed ubuntu 13.04 alongside windows xp professional. When I tried to upgrade to 13.10 from 13.04, it took some time to download and then it started cleaning the files and then message was displayed that xp cleaned (this msg was seen by my younger brother and then he cut the power off) . Now the computer when starts displays this screen and I dont know how to proceed. To anyone giving solution I would like tell you that I prefer xp over linux(personal reasons). So is there any way to get out of this problem, neithet I can open xp nor linux?

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  • Cancelling your Windows Phone Dev account- is very difficult.

    - by Sahil Malik
    SharePoint, WCF and Azure Trainings: more information Here is Microsoft’s new business model. Make it so damned difficult to cancel your windows phone dev account subscription, that you will just give up trying and pay as the easy route out.Very sad that it has come to this. Usually I would not approach an open forum such as my site for such issues, but the sad state of their affairs leaves me with no choice. Here is the issue, last year, I opened a WPDev account, for which you have to pay. Seeing that its been a year, I haven’t submitted anything, I didn’t want to renew my account and pay the fee. I guess if I ever write a WP app, I will reopen the subscription. Sounds about right huh? fair? So, what would you expect? Login to your account, find the subscription, hit cancel! Right?No not really! Read full article ....

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  • Form Validation, Dependant Drop Downs, Data Level Security in OWS for DotNetNuke - 5 Videos

    In this tutorial we demonstrate some very advanced techniques for building a car parts application in Open Web Studio. Throughout the tutorial we cover form input, validation, how to use dependant drop down lists, populating checkbox lists and introduce a new concept of data level security. Data level security allows you to control which data a user can access within a module. The videos contain: Video 1 - How to Setup Form Validation Video 2 - Car Parts Application, Assigning Security Roles into a Global Session Variable Video 3 - How to Build the Categories Module with Data Level Security Video 4 - How to Build the SubCategories Module and Use SubQuery Video 5 - How to Build the Car Parts List Module Total Time Length: 44min 19secsDid you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • Synergy - easy share of keyboard and mouse between multiple computers

    Did you ever have the urge to share one set of keyboard and mouse between multiple machines? If so, please read on... Using multiple machines Honestly, as a software craftsman it is my daily business to run multiple machines - either physical or virtual - to be able to solve my customers' requirements. Recent hardware equipment allows this very easily. For laptops it's a no-brainer to attach a second or even a third screen in order to extend your native display. This works quite handy and in my case I used to attached two additional screens - one via HD15 connector, the other via HDMI. But... as it's a laptop and therefore a mobile unit there are slight restrictions. Detaching and re-attaching all cables when changing locations is one of them but hardware limitations, too. After all, it's a laptop and not a workstation. I guess, that anyone working in IT (or ICT) has more than one machine at their workplace or their home office and at least I find it quite annoying to have multiple sets of keyboard and mouse conquering my remaining space on my desk. Despite the ugly looks of all those cables and whatsoever 'chaos of distraction' I prefer a more clean solution and working environment. This allows me to actually focus on my work and tasks to do rather than to worry about choosing the right combination of keyboard/mouse. My current workplace is a patch work of various pieces of hardware (approx. 2-3 years): DIY desktop on Ubuntu 12.04 64-bit, Core2 Duo (E7400, 2.8GHz), 4GB RAM, 2x 250GB HDD, nVidia GPU 512MB Dell Inspiron 1525 on Windows 8 64-bit, 4GB RAM, 200GB HDD HP Compaq 6720s on Windows Vista 32-bit, Core2 Duo (T5670, 1.8GHz), 2GB RAM, 160GB HDD Mac mini on Mac OS X 10.7, Core i5 (2.3 GHz), 2GB RAM, 500GB HDD I know... Not the latest and greatest but a decent combination to work with. New system(s) is/are already on the shopping list but I live in the 'wrong' country to buy computer hardware. So, the next trip abroad will provide me with some new stuff. Using multiple operating systems The list of hardware above already names different operating systems, and actually I have only one preference: Linux. But still my job as a software craftsman for Visual FoxPro and .NET development requires other OSes, too. Not a big deal, it's just like this. Additionally to those physical machines, there are a bunch of virtual machines around. Most of them running either Windows XP or Windows 7. Since years I have the practice that each development for one customer is isolated into its own virtual machine and environment. This keeps it clean and version-safe. But as you can easily imagine with that setup there are a couple of constraints referring to keyboard and mouse. Usually, those systems require their own pieces of hardware attached. As stated, I don't like clutter on my desk's surface, so a cross-platform solution has to come in here. In the past, I tried it with various applications, hardware or network protocols like X11, RDP, NX, TeamViewer, RAdmin, KVM switch, etc. but the problem in this case is that they either allow you to remotely connect to the other system or exclusively 'bind' your peripherals to the active system. Not optimal after all. Synergy to the rescue Quote from their website: "Synergy lets you easily share your mouse and keyboard between multiple computers on your desk, and it's Free and Open Source. Just move your mouse off the edge of one computer's screen on to another. You can even share all of your clipboards. All you need is a network connection. Synergy is cross-platform (works on Windows, Mac OS X and Linux)." Yep, that's it! All I need for my setup here... Actually, I couldn't believe it myself that I didn't stumble over synergy earlier but 'Get over it' and there we go. And despite the fact that it is Open Source, no, it's also for free. Donations for the developers are very welcome and recently they introduced Synergy Premium. A possibility to buy so-called premium votes that can be used to put more weight / importance on specific issues or bugs that you would like the developers to look into. Installation and configuration Simply download the installation packages for your systems of choice, run the installer and enter some minor information about your network setup. I chose my desktop machine for the role of the Synergy server and configured my screen setup as follows: The screen setup allows you currently to build or connect up to 15 machines. The number of screens can be higher as those machine might have multiple screens physically attached. Synergy takes this into the overall calculations and simply works as expected. I tried it for fun with a second monitor each connected to both laptops to have a total number of 6 active screens. No flaws after all - stunning! All the other machines are configured as clients like so: Side note: The screenshot was taken on Windows 8 and pasted via clipboard into Gimp running on Ubuntu. Resume Synergy is now definitely in my box of tools for my daily work, and amongst the first pieces of software I install after the operating system. It just simplifies my life and cleans my desk. Never again without Synergy!Now, only waiting for an Android version to integrate my Galaxy Tab 10.1, too. ;-) Please, check out that superb product and enjoy sharing one keyboard, one mouse and one clipboard between your various machines and operating systems.

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  • Pin Your Favorite Websites to the Metro Start Screen in Windows 8

    - by Lori Kaufman
    It’s easy to pin apps and folders to the Metro Start screen in Windows 8. What about your favorite websites? Windows 7 allows you to pin websites to the Taskbar. It’s also easy to pin your favorite websites to the Windows 8 Metro Start screen. Open Internet Explorer 10 from the Metro Start screen and navigate to a website you want to pin. Once the site has loaded, click the Pin to Start button on right side of the bar at the bottom. HTG Explains: Is UPnP a Security Risk? How to Monitor and Control Your Children’s Computer Usage on Windows 8 What Happened to Solitaire and Minesweeper in Windows 8?

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  • How do I improve my ability to manipulate code quickly, not wpm?

    - by Steve Moser
    I have seen several questions on here about touch typing and words per minute but not about improving ones ability to manipulate text using keyboard shortcuts, bindings etc. I have tried putting a cheat sheet of keyboard shortcuts next to my monitor but I can never incorporate them in my 'flow'. I have also tried the 'just use vi and don't touch the mouse' method but that only helps me with navigating code and not editing. I would prefer to use some application (or game) to learn text manipulation. But it looks like nothing like that exists (app idea?). I'm open to other suggestions too.

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  • Picture lens doesn't find anything

    - by Han Cnx
    I get Facebook results, but nothing from my computer. If I open a terminal and use 'locate' then I can find stuff, but the picture lens is empty. Note that my picture files are on an NTFS partition. I have made a link named 'Pictures' in my home folder that points to the location where the picture files are. Again, this works with the 'locate' command and it also works for the Music lens, which is also a link in my home folder. It also (kinda) works for the Video lens, though it only wants to find videos I have opened, which seems not consistent with the other lenses. (and also not very useful this way)

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  • How do I get my polygons to be lighted by either side?

    - by Molmasepic
    Okay, I am using Ogre3D and Gorilla(2D library for ogre3D) and I am making Gorilla::Screenrenderables in the open scene. The problem that I am having is that when I make a light and have my SR(screenrenderable) near it, it does not light up unless the face of the SR is facing the light... I am wondering if there is a way to maybe set the material or code(which would be harder) so the SR is lit up whether the vertices of the polygon are facing the light or not. I feel it is possible but the main obstacle is how I would go about doing this.

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