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• How to open files which are located in VirtualBox's Guest Machine from Netbeans of Host Machine

  - by Bakhtiyor

  I have Ubuntu 10.04 installed in my Host Machine and it has VirtualBox. I have Guest Machine wich runs Ubuntu 10.10. I have NetBeans installed in Host Machine and need to open my project files which are located in Guest Machine. The reason I need it is because in my working place I have not access to install any applications, that is why I have Guest Machine where I have Web Server installed on it and also I have one web application that I am developing. I need to open that web application files from Guest Machine's Netbeans in order to modify/create new files for my web application. I have configured SSH server of Guest Machine and added port redirection in the VirtualBox so that now I can connect to it from Host Machine. But I could not find any way to open those files from Netbeans. Could anybody give me advice about how can I do that please? UPDATE I forgot to say that I don't want to use SharedFolders.

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• Problem with gnome-shell-extensions-user-theme

  - by sodiumnitrate

  I'm trying to install themes with gnome tweak, and I need to install gnome-shell-extensions-user-theme because otherwise I cannot see the shell extensions tab. However, I cannot install shell extensions. I have tried to install by adding the PPA with the following: sudo add-apt-repository ppa:webupd8team/gnome3 Then, sudo apt-get update Finally, when I try to install: sudo apt-get install gnome-shell-extensions-user-theme It gives an error: The following packages have unmet dependencies: gnome-shell-extensions-user-theme : Depends: gnome-shell-extensions-common but it is not going to be installed E: Unable to correct problems, you have held broken packages. I am convinced that there is a problem with the package. So I went on and tried to install the extensions from the website: https://extensions.gnome.org/ But even though I use Firefox (15.0), I cannot see the "switch" that is being mentioned to install the extension. Maybe the version of Firefox is too new. Is there any workaround that you know of? (By the way, I use Ubuntu 12.04, freshly downloaded and installed.)

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• What to do when issue-tracker is down?

  - by Pablo

  It has happened in our team that our issue-tracker is down. Happens about once a week now (yes, wow), and there's not really much we can do to get it back up, since it's hosted by our client in a different timezone. It sometimes takes several hours for it to be operative again. In the meanwhile, we can't really tell which issues we were working on, and in case we do, we cannot update those issues, as in moving them through the workflow, logging used hours, checking the issue's description, leaving comments, and so on. So the question is: how can we, as a team, work in the meanwhile so that when the issue-tracker is up again, we have the least possible hassle updating it with what we've been working?

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• Physics timestep questions

  - by SSL

  I've got a projectile working perfectly using the code below: //initialised in loading screen 60 is the FPS - projectilEposition and velocity are Vector3 types gravity = new Vector3(0, -(float)9.81 / 60, 0); //called every frame projectilePosition += projectileVelocity; This seems to work fine but I've noticed in various projectile examples I've seen that the elapsedtime per update is taken into account. What's the difference between the two and how can I convert the above to take into account the elapsedtime? (I'm using XNA - do I use ElapsedTime.TotalSeconds or TotalMilliseconds)? Edit: Forgot to add my attempt at using elapsedtime, which seemed to break the physics: projectileVelocity.Y += -(float)((9.81 * gameTime.ElapsedGameTime.TotalSeconds * gameTime.ElapsedGameTime.TotalSeconds) * 0.5f); Thanks for the help

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• Why You never see a Sonic Screwdriver in Action Movies [Video]

  - by Asian Angel

  This video takes a humorous look at why you never see a sonic screwdriver in all those action movies. After all, having one would just ruin all of the ‘fun’ for everyone! Note: Video contains some language that may be considered inappropriate. Sonic Screwdriver [via Geeks are Sexy] How to See What Web Sites Your Computer is Secretly Connecting To HTG Explains: When Do You Need to Update Your Drivers? How to Make the Kindle Fire Silk Browser *Actually* Fast!

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• Minimum brightness level is brighter than the levels just above it

  - by greggory.hz

  I'm using a macbook pro 8,1. When I use the brightness keys on the keyboard, decreasing the brightness works until it reaches the lowest brightness level. At that point (when on the lowest level), the brightness is something like 70 or 80% instead of 0-10% (or whatever it usually is). All the other levels are fine. How can I adjust/calibrate these brightness controls? PS: I'm currently using 12.04 but I've had the same issue no later than 11.10 (and I'm fairly confident it was present in 11.04 as well). UPDATE: If I go to System Settings and select "Brightness and Lock" the exact same thing happens, but there is more fine grained control of the brightness. It goes to completely black when the dial is about 10% from the left edge. When it passes that point, anywhere inside that left 10% appears to be about 70 - 80% brightness (there's no change regardless of where the dial is in this section).

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• How can I play a DVD-A (DVD-Audio) disc?

  - by Marek Grzenkowicz

  I was able to play such a disc using VLC, but I am wondering if any music player supports the DVD-A format. UPDATE: I checked Rhythmbox and Banshee - I found no option like Play Disc or Open Disc, so I have no idea how I could even try to start playing a DVD-A disc. This has also nothing to do with missing plug-ins or codecs - the packages gstreamer0.10-plugins-ugly, gstreamer0.10-plugins-bad and ubuntu-restricted-extras were installed on my machine before. I guess I am stuck with VLC (Totem shows a DVD menu, but then hangs). However, I am missing the regular music player experience - ability to change order of tracks, adding tracks to a playlist, listening only to selected tracks, etc. I found Idea #22415: Please add full support for DVD-Audio and LPCM at Ubuntu Brainstorm.

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• What's the best way to manage list item sort order with Drag & Drop UI?

  - by Reddy S R

  I have a list of Students that I should display to user on a web page in tabular format. The items are stored in DB along with SortOrder information. On the web page, user can rearrange the list order by dragging and dropping the items to their desired sort order, similar to this post. Below is a screenshot of my test page. In the above example, each row has sort order info attached to it. When I drop John Doe (Student Id 10) above the Student Id 1 row, the list order should now be: 2, 10, 1, 8, 11. What's the optimistic (less resource hungry) way to store and update Sort Order information? My only idea for now is, for every change in the list's sort order, every object's SortOrder value should be updated, which in my opinion is very resource hungry. Just FYI: I might have at most 25 rows in my table.

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• Ubuntu 12.10 64bit fresh install, wireless issue!

  - by Dave

  Just installed a fresh Ubuntu 12.10 64bit on my laptop, run the update manager, restarted and suddenly I can't use my wifi anymore. Ubuntu software center installed automatically the wifi additional driver as you can see in my screenshot. If I mark the option "Do not use the device" and apply changes, restarting Ubuntu my wifi is back and I can use it. If I run iwconfig my terminal is showing this Now if I use Ubuntu for more than 20 minutes surfing the web my wifi it keeps to be connected but I don't receive any signal from it. Any page I try to open it simply don't open (just waiting icon). If I disconnect my wifi and connect it again, same issue, it doesn't work. The only way to make it work again is to restart Ubuntu. And the same story it happens again after aprox. 20, 30 minutes. WIFI device details: 03:00.0 Network controller [0280]: Broadcom Corporation BCM4313 802.11b/g/n Wireless LAN Controller [14e4:4727] (rev 01) Thanks, Dave

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• What is the difference between Java 6 and PHP 5.4? [closed]

  - by Mashael

  First of all, let me explain the matter. I'm in a class where we learn Java 6 OOP fundamentals. However, my goal is to learn PHP (the last version) next. So, my question: Is there a big difference between PHP and Java 6 in OOP concepts? Meaning that after I finish the OOP class in Java will I find a lot of things that need to be learned in PHP regarding OOP? Update: *My goal of learning PHP next is to build dynamic sites* (I'm not sure of other options) and to follow OOP.

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• My website dns_server_failure when using University Connection

  - by iMohammad

  My website used to open just fine in the past when I use my University connection, but now since I transfered my website to another hosting company this problem started to appear. Some times the website open and sometimes I get this alot!: Network Error (dns_server_failure) Your request could not be processed because an error occurred contacting the DNS server. The DNS server may be temporarily unavailable, or there could be a network problem. For assistance, contact your network support team. Do you have any idea? I checked using websites checking tools and my website was running just fine on any other connection , ADSL, 3g but except my University connection. Thanks in advance :) UPDATE: When I open my website using the Real IP Server it does open just fine. But with my domain nope. Also, even other websites that are hosted on my server cannot be opened too

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• Web-based CMS for mobile app

  - by JWood

  I'm just about to start developing a mobile app which needs to be fed from a CMS. I started designing the tables when I thought there must be something out there which could save me a load of time and let me concentrate on the mobile side of things. So, I'm looking for a CMS that will let me create hierarchical "pages" which will just be 4-5 database fields with a simple front-end to allow to edit and update them. I don't mind having to write some code to layout the database and forms etc, any saving on starting from scratch would be good. The only requirement is that I be able to access the data via some sort of web service, REST, JSON, XML, anything really... Can anyone suggest anything that might help? Thanks, J

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• Reproducing a Conversion Deadlock

  - by Alexander Kuznetsov

  Even if two processes compete on only one resource, they still can embrace in a deadlock. The following scripts reproduce such a scenario. In one tab, run this: CREATE TABLE dbo.Test ( i INT ) ; GO INSERT INTO dbo.Test ( i ) VALUES ( 1 ) ; GO SET TRANSACTION ISOLATION LEVEL SERIALIZABLE ; BEGIN TRAN SELECT i FROM dbo.Test ; --UPDATE dbo.Test SET i=2 ; After this script has completed, we have an outstanding transaction holding a shared lock. In another tab, let us have that another connection have...(read more)

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• Importing a windows project into android using cocos2d-x

  - by Ef Es

  What I am trying to do today is to import a full project to Android, but no tutorials are available for that that I have seen. My approach was to create a new android project, copy all the classes and resources in the folders and calling ./build_native.sh but I get an error because most of the files are not being included in the project. I tried opening the Android.mk and I can see why "LOCAL_SRC_FILES := AppDelegate.cpp \ HelloWorldScene.cpp" are the only files linked. Should I manually modify the make file or can it be automated by some way I don't know? Thank you. UPDATE: I manually added all files and headers to the make file and I get errors linking Box2D or cocosdenshion libraries.

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• Facebook Connect with CodeIgniter login problems

  - by Alastair Dewar

  Im having a problem using Facebook Connect on my latest website. Im running it using the CodeIgniter framework and Elliot Haughin's library (http://www.haughin.com/code/facebook/). Everything is setup okay, when the user goes to login, the request is sent to Facebook okay and returns with the code (which i presume identifies the session?). However, it doesnt seem to update the library, and after doing all this still thinks that the user is not logged in. It makes me think its a bug in the library itself, but I can't see anyone else with this problem. I have tried dumping the error log from the library but it doesnt find any problems. If someone could shed any light I would be so grateful!

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• Best way to address this Magento issue

  - by robgt

  I am in need of some advice/pointers on how best to attack a problem I am faced with in Magento 1.4.0.1. Here is the scenario: Consider a product catalog of multiple thousands of products in which there are many and various retail markup percentages. There is a need to sell some of those products to other retailers, and I need a way to easily categorise them into percentrage markup groups, so that the other traders can easily purchase items from us without needing to call and confirm pricing. All products prices are added to the magento database including VAT - so the actual retail value is the starting point. I think this needs to be done by adding an attribute on the products that determines the maximum discount level that can be applied to any given product. Obviously, this would entail a massive amount of work to update every product. Is there a way to achieve what we need that I don't yet know about (within Magento)? Can single attribute values be mass-populated somehow, without affecting other attributes such as name/description/etc?

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• What is Cyber Monday? [Infographic]

  - by Jason Fitzpatrick

  Nearly everyone is familiar with Black Friday, the massive shopping day right after Thanksgiving, but Cyber Monday is a recent invention. Check out this infographic for the low down. Cyber Monday is only a scant six years old, an invention of online retailers looking to create a shopping day to compete with the in-store frenzy of Black Friday. Although quite a few retailers offer online Black Friday deals, Cyber Monday is a the biggest day for online deals–many shoppers fail to find the things they were looking for on Black Friday and turn to online sources. You can read more about Cyber Monday here or visit the link below for a higher resolution copy of the infographic. What Is Cyber Monday? [YouNeverLose via Mashable] How to See What Web Sites Your Computer is Secretly Connecting To HTG Explains: When Do You Need to Update Your Drivers? How to Make the Kindle Fire Silk Browser *Actually* Fast!

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• Building a distributed system on Amazon Web Services

  - by Songo

  Would simply using AWS to build an application make this application a distributed system? For example if someone uses RDS for the database server, EC2 for the application itself and S3 for hosting user uploaded media, does that make it a distributed system? If not, then what should it be called and what is this application lacking for it to be distributed? Update Here is my take on the application to clarify my approach to building the system: The application I'm building is a social game for Facebook. I developed the application locally on a LAMP stack using Symfony2. For production I used an a single EC2 Micro instance for hosting the app itself, RDS for hosting my database, S3 for the user uploaded files and CloudFront for hosting static content. I know this may sound like a naive approach, so don't be shy to express your ideas.

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• Is an 'if password == XXXXXXX' enough for minimum security?

  - by Morgan Herlocker

  If I create a login for an app that has middle to low security risk (in other words, its not a banking app or anything), is it acceptable for me to verify a password entered by the user by just saying something like: if(enteredPassword == verifiedPassword) SendToRestrictedArea(); else DisplayPasswordUnknownMessage(); It seems to easy to be effective, but I certainly would not mind if that was all that was required. Is a simple check on username/password combo enough? Update: The particular project happens to be a web service, the verification is entirely server side, and it is not open-source. Does the domain change how you would deal with this?

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• What to do?! Upgrading from 12.10 to 13.04 failed :(

  - by Jon Ramirez

  I got an update reminder to go from 12.10 to 13.04. I followed the instructions, was able to download the package, and started installing. Up to a point where my computer (seemed to) restart and there was just a black screen (with the backlight on) for more than an hour. Then I decided that this was too long for an installation and forced my laptop to shut down. I think that messed it up. Now I'm stuck in what seems to be 13.04 with bits of 12.10 in it. I tried to upgrade again through software updater but it goes to Partial Upgrade. But when I try that, I get this error message: "An upgrade from 'raring' to 'quantal' is not supported by this tool." Help! What should I do! I'm running my Ubuntu on my Dell Inspiron.

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• How to edit pdf metadata from command line?

  - by bdr529

  I need a command line tool for editing metadata of pdf-files. I'm using a Aiptek MyNote Premium tablet for writing my notes and minutes on this device, import them later and convert them to pdf automatically with a simple script using inkscape and ghostscript. Is there any command line tool to add some categories to the pdf's metadata, so i can find the pdf later (e.g. with gnome-do) by categories? Update: I tried the solution with pdftk and it works, but it seems that gnome-do doesn't take care of pdf-metadata. Is there a way to get gnome-do to do that?

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• I dont know my password and wont let me change it via GRUB

  - by josh

  I recently turned off the login password so i would not have to enter my password every time I turn the system on. But now when I try to update or download anything it asks me for my password so I enter my old password and it keeps telling me its wrong when I have only ever had the 1 password and its a simple 1 so I would not forget and considering I have only had UBUNTU installed for two days it is really frustrating. I have also tried resetting it via the GRUB but it wont let me type the new password. Please help ASAP.

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• How do I determine the draw order in an isometric view flash game?

  - by Gajet

  This is for a flash game, with isometric view. I need to know how to sort object so that there is no need for z-buffer checking when drawing. This might seem easy but there is another restriction, a scene can have 10,000+ objects so the algorithm needs to be run in less than O(n^2). All objects are rectangular boxes, and there are 3-4 objects moving in the scene. What's the best way to do this? UPDATE in each tile there is only object (I mean objects can stack on top of each other). and we access to both map of Objects and Objects have their own position.

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• Corrupted File System on Dual HD/Dual Boot System

  - by Troy

  I have the following system set up: 2 drives, 1 TB each, one with Windows 7 and the other with what used to be Ubuntu 11.x After an update my system became corrupted and now the file system is apparently corrupt. The Ubuntu drive is /dev/sda2, the Windows 7 is /dev/sda1. I've tried fsck /dev/sda2 -t ext3 and that does nothing. I'm not sure what to do at this point. I don't even mind wiping the /dev/sda2 drive clean, so it will at least accept a completely new installation of Ubuntu. I just don't know how to do that. Please help. Thank you

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• Game thread, render thread, animation/inverse kinematics, and synchronization

  - by user782220

  In a multithreaded setup with a game logic thread and a render thread, with some kind of skin mesh animation with inverse kinematics plus etc how does animation work? Does the game logic thread just update a number saying time T in the animation and then the render thread infers Who owns the skin mesh animation, the game logic thread or the render thread? How is it stored in the scene graph if it is stored there at all? When the game logic updates does it do the computation of the skin mesh animation and the computation of the inverse kinematics and then store the result directly in the scene graph or is it stored indirectly and the render thread does the computation?

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