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  • Where to start studying for developing ubuntu?

    - by Mad-scientist
    Hi am Computer Science student currently in college and very interested in developing open source software especially ubuntu.Is there a one stop go-to place for reading about developing ubuntu. For example I scoured through the official tutorial and documentation of Python and I was good to go.I could write useful applications. Is there any equivalent for Ubuntu or unity? I tried downloading the alpha 2,put kept crashing every 5 minute. I was told in IRC,it was due to some Xorg stack change. Now I cant even look at new Unity,let alone help develop it. Any help or guidance appreciated.

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  • permission denied errors while starting namenode in hadoop 2.2.0

    - by Riddle
    I recently installed hadoop2.2.0 on my desktop running : Linux livingstream 3.2.0-29-generic #46-Ubuntu SMP Fri Jul 27 17:03:23 UTC 2012 x86_64 x86_64 x86_64 GNU/Lin I am able to format the namenode just fine , however when I start the namenode using the following command: hadoop-daemon.sh start namenode I get the following permission errors , can anyone please help me with these errors: hduser@livingstream:/usr/local/hadoop$ hadoop-daemon.sh start namenode mkdir: cannot create directory `/var/run/hadoop': Permission denied starting namenode, logging to /var/log/hadoop/hduser/hadoop-hduser-namenode- livingstream.out /usr/sbin/hadoop-daemon.sh: line 138: /var/run/hadoop/hadoop-hduser-namenode.pid: No such file or directory Can you please help me with these errors. Best Regards, Ishan

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  • Java Developers: Open-source Modules, Great Tools, Opportunity.

    - by Paul Sorensen
    The role of Java developer may just be better than ever. An excellent article in Java Magazine discusses the availability of web-based tools that help development teams more effectively manage their projects and modules. If you are a Java developer you should definitely read this article. I especially like the Expert Opinions scattered throughout the article. These highlight real-world usage of the latest and greatest development tools.  As you consider steps to move your career forward, consider Java certification. Oracle has over 15 unique Java certification credentials available. The process of becoming certified in Java and preparing for your exams will require you to study, learn and practice (code). All of this activity will help you sharpen your skills and increase your working knowledge of Java - making you a better developer and more valuable member of your team. You can use the Certification Finder on the Oracle certification homepage to find a Java certification that is right for you. Thanks! 

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  • URL Rewrite http to https EXCEPT files in a specific subfolder

    - by BrettRobi
    I am trying to force all traffic on my web site to use HTTPS, using the URL Rewrite 2.0 module added to IIS 7.5. I got that working and now have a need to exclude a couple of pages from using SSL. So I need a rule to rewrite all URL except those referencing this folder to HTTPS. I've been banging my head against the wall on this and am hoping someone can help. I tried creating a rule to match all URL except those in a nossl subfolder as in this example: <rule name="HTTP to HTTPS redirect" enabled="true" stopProcessing="true"> <match url="(/nossl/.*)" negate="true" /> <conditions logicalGrouping="MatchAll" trackAllCaptures="false"> <add input="{HTTPS}" pattern="off" /> </conditions> <action type="Redirect" url="https://{HTTP_HOST}/{R:1}" redirectType="Found" /> </rule> But this doesn't work. Can anyone help?

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  • Text based game in XNA

    - by Sigh-AniDe
    I want to create a text based game, where the player will type up,down, left or right and the sprite will move in that direction. I created the game and at the moment the player moves with the up,left,down and right keys. I would like to change the movement of the sprite from keypresses to text commands, Ive googled a lot on creating text based games in XNA but have had no luck. Could you please help me or guide me in the right direction of how to do this in XNA. All help will greatly be appreciated. Thanks

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  • HD Video Peformance Unacceptable

    - by Mike Hasselbeck
    Was wondering if anyone could help me boost HD 1080p video performance on my machine? I've got an AMD Athlon X2 Dual Core processor, 2 gb RAM & an ATI Radeon 5450 video card. I've installed the latest ATI Catalyst drivers, I installed the hardware acceleration things and linked them (I believe) to VLC. Still, it's still not running as well as I would like. Any thoughts or suggestions? Any help would be much appreciated. Thanks!

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  • RTOS experience

    - by Subbu
    Hi, I have been working as an embedded software engineer on mostly 8 bit micro-controller firmware and desktop/mobile applications development for the past five years. My work on a WinCE project (in which I got introduced to .NET CF) was short lived. I did use core APIs for interrupt processing, peripheral communication, etc...but again, not exactly a pure RTOS environment. In order to get together more solid experience for growing more in the embedded field, I want to work more with RTOSes. Will buying an evaluation board with an RTOS and putting together a project at home be regarded as a good experience or will an online course be more useful? I am just not clear as to what will be regarded as good experience. Any suggestions or directions will greatly help me. I have a passion for the field but just a need a point in the right direction. Thanks for any help in advance. Regards, Subbu

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  • XNA: SpriteFont question

    - by Zukki
    Hi everyone, I need some help with the SpriteFont. I want a different font for my game, other than Kootenay. So, I edit the SpriteFont xml, i.e: <FontName>Kootenay</FontName> or <FontName>Arial</FontName> No problem with Windows fonts, or other XNA redistributable fonts pack. However, I want to use other fonts, that I downloaded and installed already, they are TTF or OTF, both supported by XNA. My problem is, I cant use them, I got this error: The font family "all the fonts i tried" could not be found. Please ensure the requested font is installed, and is a TrueType or OpenType font. So, checking at the windows fonts folder, I check the properties and details of the fonts, I try all the names they have, and but never works. Maybe I need some kind of importing or installing in order to use them, I dont know, and I hope you guys can help me, thanks!

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  • Using Resources the Right Way

    - by BuckWoody
    It’s an interesting time in computing technology. At one point there was a dearth of information available for solving a given problem, or educating ourselves on broader topics so that we can solve problems in the future. With dozens, perhaps hundreds or thousands of web sites and content available (for free, in many cases) from vendors, peers, even colleges and universities, it seems like there is actually too much information. Who has the time to absorb all this information and training? Even if you had the inclination, where to start? In fact, it seems so overwhelming that I often hear people saying that they can’t find the training they need, or that vendor X or Y “doesn’t help their users”. On questioning these folks, however, I often find that they – and sometimes I - haven’t put in the effort to learn what resources we have. That’s where blogs, like this one, can help. If you follow a blog, either by checking it often or perhaps subscribing to the Really Simple Syndication (RSS) feed, you’ll be able to spread out the search or create a mental filter for the information you need. But it’s not enough just read a blog or a web page. The creators need real feedback – what doesn’t work, and what does. Yes, you’re allowed to tell a vendor or writer “This helped me because…” so that you reinforce the positives. To be sure, bring up what doesn’t work as well –  that’s fine. But be specific, and be constructive. You’d be surprised at how much it matters. I know for a fact at Microsoft we listen – there is a real live person that reads your comments. I’m sure this is true of other vendors, and I also know that most blog authors – yours truly most especially – wants to know what you think.   In this blog entry I’d to call your attention to three resources you have at your disposal, and how you can use them to help. I’ll try to bring up things like this from time to time that I find useful, and cover in them in more depth like this. Think of this as a synopsis of a longer set of resources that you can use to filter whether you want to research further, bookmark, or forward on to a circle of friends where you think it might help them.   Data Driven Design Concepts http://msdn.microsoft.com/en-us/library/windowsazure/jj156154 I’ll start with a great site that walks you through the process of designing a solution from a data-first perspective. As you know, I believe all computing is merely re-arranging data. If you follow that logic as well, you’ll realize that whenever you create a solution, you should start at the data-end of the application. This resource helps you do that. Even if you don’t use the specific technologies the instructions use, the concepts hold for almost any other technology that deals with data. This should be a definite bookmark for a developer, DBA, or Data Architect. When I mentioned my admiration for this resource here at Microsoft, the team that created it contacted me and asked if I’d share an e-mail address to my readers so that you can comment on it. You’re guaranteed to be heard – you can suggest changes, talk about how useful – or not – it is, and so on. Here’s that address:  [email protected]   End-to-End Example of a complete Hybrid Application – with Live Demo https://azurestocktrader.cloudapp.net/Default.aspx I learn by example. I also like having ready-made, live, functional demos that show the completed solution at work. If you’ve ever wanted to learn how a complex, complete, hybrid application that bridges on-premises systems with cloud-based databases, code, functions and more, this is it. It’s a stock-trading simulator, and you can get everything from the design to the code itself, or you can just play with the application. It’s running on Windows Azure, the actual production servers we use for everything else. Using a Cloud-Based Service https://azureconfigweb.cloudapp.net/Default.aspx Along with that stock-trading application, you have a full demonstration and usable code sample of a web-based service available. If you’re a developer, this is a style of code you need to understand for everything from iPhone development to a full Service-Oriented Architecture (SOA) environment. So check out these resources. I’ll post more from time to time as I run across them. Hopefully they’ll be as useful to you as they are to me. Oh, and if you have a comment on any of the resources, let them know. And if you have any comments about these or any of my entries, feel free to post away. To quote a famous TV Show: “Hello Seattle – I’m listening…”

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  • How to disable the Mount notification in Gnome 3.4?

    - by Thompson
    How to disable those annoying notifications when you plug a new disk in, or connect to a network and so on.... I know that if I add a device to a mount script they will be mounted on boot thus not showing me the notification, which I did for my hard drives, but it doesn't help with all those flash disks I have... I can't add them all that would be silly. I looked at: How can I disable gnome-shell's notification area? ... but they didn't help, since the code was different I also looked at configuration editor, but I think it can only disable auto-mount when inserted, it doesn't disable notification...

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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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  • Compiling midnight commander

    - by notabene
    Hello, I need help with compiling midnight commander so that I can make some changes (for educational purposes). Or even creating the make files. After downloading latest version from git. I try to perform ./autogen.sh . Result is: maint/autopoint: 418: cannot open /usr/share/gettext/archive.tar.gz: No such file tar: This does not look like a tar archive tar: Exiting with failure status due to previous errors cvs checkout: cannot find module `archive' - ignored find: `archive': No such file or directory find: `archive': No such file or directory find: `archive': No such file or directory autopoint: *** infrastructure files for version 0.14.3 not found; this is autopoint from GNU gettext-tools 0.17 autopoint: *** Stop. I have installed gettext and folder /usr/share/gettext does exist. But there is no archive.tar.gz. I have no idea what should this archive contain or where to get it. Can you help me please?

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  • The Ubuntu Advantage Service right for my non-profit?

    - by Robert
    My small 5 computer office currently runs on Ubuntu. 2 of the desktops run Windows7 in Sun Virtualbox software, and are used for Quickbooks. I am going off to college, and I am looking for a paid tech support solution to replace my IT position. I have an approx $300/mth budget, and I am wiling to discuss higher rates. Everyone in the office is currently comfortable with regular desktop usage, but I am handling all of the software installation and updates. I was hoping to get a total support package for all of their tech related questions, but I cannot find any services which will support linux. Is the Ubuntu Advantage Service something which can take my place? They would mostly need network help, printer help, and an occasional software compatibly troubleshooting session. If this is not a solution, does anyone know of a tech support forum/hotline which would cover all of this? Thank you for reading.

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  • Why does my program stutter so much?

    - by user36322
    I've been very frustrated trying to solve this. I've looked it up, and all the answers are the same: set IsFixedTimeStep = false. This doesn't help me at all, the program is still jittery and stutters. I have absolutely no idea what is going on, can you guys help? Code for movement (objects is a list): speed = Math.Min(speed + (speedIncrement * gameTime.ElapsedGameTime.Milliseconds / 200), maxSpeed); for (int i = objects.Count - 1; i >= 0; i--) { objects[i].rect.Y += (int)(speed * gameTime.ElapsedGameTime.Milliseconds); //Check if the object is past the screen. If it is, remove it if (objects[i].rect.Y > screenHeight) { objects.Remove(objects[i]); } }

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  • changed /etc permission in oneiric (ubuntu11.10) by using "sudo chmod 665 /etc" cant use sudo now

    - by GuruDevil
    i screwed up big time. i changed the permission of /etc in ubuntu 11.10 by using following command sudo chmod 665 /etc now when ever i try to use sudo it gives the following error: sudo: can't open /etc/sudoers: Permission denied sudo: no valid sudoers sources found, quitting any help will be greatly appreciated because i am new to ubuntu....i have already tried using su but it doesnt even login as root and even i give it the right password it always say Authentication Failure......i dont want to login as root coz its risky and even a newbie in linux like me is not stupid enough to have such control...i just want to use my sudo again......i have tried to go into recovery mode as well but i cant get in to recovery mode......HELP please!!!

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  • How to search drupal site from the new Unity lense?

    - by Ognjen
    I'm creating a simple Unity lense for my college site which is based on Drupal, but I don't know how to adapt this command for Drupal API. Please help, it's python. We now create our query url, using the Wikipedia opensearch API url = ("%s/w/api.php?action=opensearch&limit=25&format=json&search=%s" % (self.wiki, search)) I'm using template to write lense following Wikipedia example http://developer.ubuntu.com/2012/04/how-to-create-a-wikipedia-unity-lens-for-ubuntu/. I don't know python but Im familiar with C. This Drupal API calling is the only problem I have to successfully develop a lense. Please help!

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  • 5 ways to stop code thrashing&hellip;

    - by MarkPearl
    A few days ago I was programming on a personal project and hit a roadblock. I was applying the MVVM pattern and for some reason my view model was not updating the view when the state changed??? I had applied this pattern many times before and had never had this problem. It just didn’t make sense. So what did I do… I did what anyone would have done in my situation and looked to pass the blame to someone or something else. I tried to blame one of the inherited base classes, but it looked fine, then to Visual Studio, but it seemed to be fine and eventually to any random segment of code I came across. My elementary problem had now mushroomed into one that had lost any logical basis and I was in thrashing mode! So what to do when you begin to thrash? 1) Do a general code cleanup – Now there is a difference between cleaning code and changing code . When you thrash you change code and you want to avoid this. What you really want to do is things like rename variables to have better meaning and go over your comments. 2) Do a proof of concept – if cleaning code doesn’t help. The  you want to isolate the problem and identify the key concepts. When you isolate code you ideally want it to be in a totally separate project with as little complexity as possible. Make the building blocks and try and replicate the functionality that you are getting in your current application. 3) Phone a friend – I have found speaking to someone else about the problem generally helps me solve any thrashing issues I am having. Usually they don’t even have to say anything to solve the problem, just you talking them through the problem helps you get clarity of mind. 4) Let the dust settle – Sometimes time is the best solution. I have had a few problems that no matter who I discussed them with and no matter how much code cleaning I had done I just couldn’t seem to fix it. My brain just seemed to be going in circles. A good nights rest has always helped and often just the break away from the problem has helped me find a solution. 5) Stack overflow it – So similar to phone a friend. I am really surprised to see what a melting pot stack overflow has been and what a help it has been in solving technology specific problems. Just be considerate to those using the site and explain clearly exactly what problem you are having and the technologies you are using or else you will probably not get any useful help…

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  • RPi and Java Embedded GPIO: Connecting LEDs

    - by hinkmond
    Next, we need some low-level peripherals to connect to the Raspberry Pi GPIO header. So, we'll do what's called a "Fry's Run" in Silicon Valley, which means we go shop at the local Fry's Electronics store for parts. In this case, we'll need some breadboard jumper wires (blue wires in photo), some LEDs, and some resistors (for the RPi GPIO, 150 ohms - 300 ohms would work for the 3.3V output of the GPIO ports). And, if you want to do other projects, you might as well by a breadboard, which is a development board with lots of holes in it. Ask a Fry's clerk for help. Or, better yet, ask the customer standing next to you in the electronics components aisle for help. (Might be faster) So, go to your local hobby electronics store, or go to Fry's if you have one close by, and come back here to the next blog post to see how to hook these parts up. Hinkmond

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  • Google I/O 2012 - Android Design for Success

    Google I/O 2012 - Android Design for Success Rachel Garb, Jens Nagel, Nate Streu, Matias Duarte You have a great idea for an Android app. You want it to stand out among hundreds of thousands. You want your users to love it and tell everyone they know. The Android User Experience team is here to help. We'll talk about the Android Design guide and other tricks of the trade for creating apps that delight users and help them accomplish their goals. No design background is required. For all I/O 2012 sessions, go to developers.google.com From: GoogleDevelopers Views: 46 5 ratings Time: 01:03:04 More in Science & Technology

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  • Speaker notification icon

    - by Dreams
    Hi, I hope somebody can help with a minor but rather annoying problem: There is a speaker icon on my desktop and I can't remove it. It has not been there before. I noticed it after I played around with XBMC 10 and a Youtube plugin. The icon shows all the time no matter what application I launch e.g. Firefox, XBMC etc. it just shows on top of the application that I launch. I tried to take a screendump, but the icon is not present in the screendump? I'm running Ubuntu 10.10 (upgrade from 10.04). Hope somebody cant help. Regards Dreams

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  • What has been your experience with paid support from Canonical ?

    - by gabkdlly
    I am considering buying "Ubuntu Desktop Support" from Canonical for 2 reasons: I have a couple of issues that I would like professional help with. ( Specifically a recurring kernel panic, and a slow wireless connection. ) I would like to lend a helping hand toward supporting Ubuntu financially. However, I am a bit worried that once I transfer the money, they will end up just referring me to the bug tracker on Launchpad. Also, free support options like this site have the pleasant property that they are open to the internet, meaning that if my issue gets fixed, it is more likely to help others with the same problem. What does paying for support from Canonical actually get you ?

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  • NetBeans 7.2 RC1 is published

    - by Ondrej Brejla
    NetBeans 7.2 RC1 was today published. You can download it here. You could read about the PHP features added to the NetBeans 7.2 release here on the blog, but the main features added or improved are: Support for PHP 5.4 PHP editing: Fix Uses action, annotations support, editing of Neon and Apache Config files and more Support for Symfony2, Doctrine2 and ApiGen frameworks FTP remote synchronization Support for running PHP projects on Hudson For more information, just look at New and Noteworthy page for NetBeans 7.2. And as obvious you can help us to test the build. Just try it and if you find an issue / error, please report it. Thanks for your help.

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  • Upgrade Ubuntu 11.10 to 12.10

    - by Daniel Minassian
    To whoever can help, I want to update the ubuntu on my laptop to 12.10 from the current version 11.10, when i click on the update manager i get a partial update gui, if i click cancel on that i get the gui for update which has three buttons check, install updates and upgrade. The upgrade button upgrades only to 12.04.1.LTS, when i press check it checks and gives me this error "W:Failed to fetch h t t p://lb.archive.ubuntu.com/ubuntu/dists/precise/main/i18n/Index No Hash entry in Release file /var/lib/apt/lists/partial/lb.archive.ubuntu.com_ubuntu_dists_precise_main_i18n_Index , W:Failed to fetch h t t p://lb.archive.ubuntu.com/ubuntu/dists/precise/multiverse/i18n/Index No Hash entry in Release file /var/lib/apt/lists/partial/lb.archive.ubuntu.com_ubuntu_dists_precise_multiverse_i18n_Index , W:Failed to fetch http://lb.archive.ubuntu.com/ubuntu/dists/precise/restricted/i18n/Index No Hash entry in Release file /var/lib/apt/lists/partial/lb.archive.ubuntu.com_ubuntu_dists_precise_restricted_i18n_Index , W:Failed to fetch http://lb.archive.ubuntu.com/ubuntu/dists/precise/universe/i18n/Index No Hash entry in Release file /var/lib/apt/lists/partial/lb.archive.ubuntu.com_ubuntu_dists_precise_universe_i18n_Index , E:Some index files failed to download. They have been ignored, or old ones used instead." Thank you for your time and help, Daniel Minassian

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  • Is there animation software available for Ubuntu?

    - by Robert Low
    Is there commercial-grade computer animation software available for Ubuntu, similar to the professional software sold for the Windows operating system? This question goes out to those of you who may be using such software professionally. My daughter recently graduated from the Art Institute of Seattle, and needs to put together an animation portfolio in order to interest employers in the field. As you know, such software is usually provided by the employer and the costs are high - several thousand dollars. I suggested that she investigate Ubuntu as a possible way to acquire the tools she needs. But, since I have no idea what might be available, either as open source or proprietary animation software, I am reaching out to the Ubuntu community for help in the hope someone who is using such software can help her. Thank you for reading this post, and for any information you might have.

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