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• Why does the sudo command not work in chroot?

  - by katarina

  I just installed a 32-bit chroot to run on my 64-bit system. In the chroot environment, the sudo command doesn't work, it says sudo: command not found Also, when I try the su root command, my password doesn't work (su: authentication failure). What password do they want? I'm quite new to Ubuntu, so actually I don't really know what I'm doing. I am just trying to follow instructions. I solved this particular problem simply by starting the chroot by the command: katarina@ubuntu:~$ schroot -c oneiric_i386 -u root instead of the one I used the first time: katarina@ubuntu:~$ schroot -a I still have some other problems, but I guess that's not for this question.

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• Announcement: Federal Financial Briefing

  - by jeffrey.waterman

  Dear Oracle/PeopleSoft Federal Financial Management Customers: Oracle is pleased to announce that we will conduct the next Federal Financial Management Briefing on Tuesday, April 17th from 8:30 am until 2:00 pm at the Oracle Campus in Reston, Virginia. The Registration Link and Agenda can be found at the web site below: Federal Financial Briefing: Register Here Directions to Oracle Reston: From the Beltway take the Dulles Toll Road (Route 267 West). Do not get on the Dulles Access Road or you will not be able to exit until you get to the airport. Take the Reston Parkway Exit (Exit 12). At the end of the exit ramp, turn right onto Reston Parkway. Make your first right onto Sunset Hills Road. Take a Right turn onto Oracle Way and park in Visitor Parking. The receptionist will direct you to the CAB.

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• When is it time to start afresh instead of trying to rewrite the existing project?

  - by gablin

  As projects grow and age and new features are introduced, there may come a time when it's probably better to start anew. Some features may require so much rewriting that it would be easier (and maybe faster) to just rewrite the whole thing from scratch. Also, then you have the opportunity to apply what you've learned from the first project and thus improve the code and design of the successor. Is there a way of recognizing when this time is? Is it just a gut feeling, or could you say that "after x years, you probably should start over", or some other rule of thumb?

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• Friday Fun: Z-Type

  - by Asian Angel

  This week’s game is a bit like Space Invaders except you use typing to defend your position. Defending your position will be easy enough at first, but things will quickly become complicated! Do you have the speed and accuracy required to survive or will the enemy have the last word? HTG Explains: Why Do Hard Drives Show the Wrong Capacity in Windows? Java is Insecure and Awful, It’s Time to Disable It, and Here’s How What Are the Windows A: and B: Drives Used For?

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• how to modify another user's .profile from the recovery console?

  - by Pinpin

  Pretty much everything is in the title, really! ;) I installed a few components to compile go programs, and the last step was to add the go directory to the path. Being a total ubuntu noob, I added the line PATH="Path/To/Folder", after the one that was already there. After the first reboot I can no longer log into ubuntu (the screen black-out for a while and then I'm back to the login screen, and the same chime greets me.) I've been able to boot in recovery mode, open the root's profile with vi, but I cant find my other user's profile, nor pretty much anything.. Any hint would be greatly appreciated! Pascal

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• How to do pre-loading

  - by Dave

  I have a question that is confusing me with making a game. For my game launch i pre load everything for the main menu then i loop the game to display it. But lets argue player wants to launch a new game or a specific level, then you preload the relevant sounds/graphics for that level right? How ever, the player must already be running the game loop if they are at the main menu, so you can't load in the game loop or you will load every frame...but im pretty sure most big games don't preload every level when you first run the game from desktop because it would take a long time on some of these games.... How is it done :S

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• Getting Started with Oracle Fusion Financials

  Designed from the ground-up using the latest technology advances and incorporating the best practices gathered from Oracle's thousands of customers, Fusion Applications are 100 percent open standards-based business applications that set a new standard for the way we innovate, work and adopt technology. Delivered as a complete suite of modular applications, Fusion Applications work with your existing portfolio to evolve your business to a new level of performance. In this AppCast, part of a special series on Fusion Applications, you hear about the unique advantages of Fusion Financials, learn about the scope of the first release and discover how Fusion Financials modules can be used to complement and enhance your existing finance solutions.

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• Flickering/Flashing screen problem related to keyboard

  - by LeandroCR

  This will seems quite bizarre but that's a huge problem for me, I'm facing it for a long time since Ubuntu 12.04. My Ubuntu/Linux Mint/Debian (Unity/Gnome) always starts flickering after using the computer for a while, I always thought this had something to do with the video board. I have an Vostro 3550 (Radeon 6xxx/Intel Onboard). First I realized that when I was navigating trough an website, when i selected with the mouse a combo, the combo closed it self automatically then the screen starts flickering. The i realized when i was trying to make the login in the terminal (crtl + alt + f1) a strange character appears, like: ^@ repeatedly. When i keep CRTL pressed the system never flickers! I have absolutely no problem using Windows. What can i do? There is no such thing as Keyboard driver on Dell Support. I would love to use Ubuntu only, but this is very annoying. Problem happens on Ubuntu 12.04, .10 and 13.04 Linux Mint 15 (Cinnamon) Debian Live with Gnome

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• The evils of #region

  - by DarrenFieldhouse

  I’m not a big fan of #region, I use it occasionally but generally try to avoid it. It’s always frustrating to open a code file and be presented with nothing but collapsed regions – sure, it looks neat (and lets face, more than a few programmers are a little OCD) but I want to see the code, that’s why I opened the file in the first place! Don’t worry, I’m not going off on a rant, I just want to direct you to a much more level headed explanation of The Problem With Code Folding. I couldn’t agree more.

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• How to read data from a large number of files in a folder? [closed]

  - by Gary Dhillon

  I seem to be having some trouble figuring out a solution for a problem. See the thing is, my code is supposed to read a lot of data from a bunch of files. I've been thinking of two different approaches: 1) the first one seems simpler, I ask the user if they would like to examine the next file or just quit out of the program.( I believe this is simpler and would take less time to run through.) 2)It reads through all the files and outputs the results for each of them, and then a shared result for all of them.( I think this would be better for what I've been asked to do and it saves the user some hassle.) If anyone can tell me how to code either of these in C++, I would be very grateful. Here is a sample of the file: 0 -- 19 weight 0 -- 20 weight I use this to determine density and possibly ignore the weights which is a number.

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• Single Responsibility Principle: Responsibility unknown

  - by lurkerbelow

  I store sessions in a SessionManager. The session manager has a dependency to ISessionPersister. SessionManager private readonly ISessionPersister sessionPersister; public SessionManager(ISessionPersister sessionPersister) { this.sessionPersister = sessionPersister; } ISessionPersister public interface ISessionPersister : IDisposable { void PersistSessions(Dictionary<string, ISession> sessions); } Q: If my application shuts down how / where do I call PersistSessions? Who is responsible? First Approach: Use Dispose in SessionManager protected virtual void Dispose(bool disposing) { if (disposing) { if (this.sessionPersister != null && this.sessionMap != null && this.sessionMap.Count > 0) { this.sessionPersister.PersistSessions(this.sessionMap); } } } Is that the way to go or are there any better solutions?

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• Ubuntu not booting from USB on laptop (no optical drive)

  - by Jamie

  I'm using a Kingston 16GB USB, with the Unetbootin program. (I've tried both downloading the installation iso manually and adding it, or using the program to download.) I've tried creating the bootable USB on an iMac, the laptop and also a desktop. I've booted into the setup of the laptop and changed the boot order to make sure it boots from that drive first. (There is no optical drive so that isn't a problem.) It's an Acer Aspire AS3810TZ. Upon booting it gives this message: SYSLINUX 4.03 2010-10-22 EDD Copyright (C) 1994-2010 H. Peter Anvin et al I get this no matter how I create the USB, it just sits there. I left the laptop for an hour and it hadn't moved. I've also tried on a different 4GB USB (Generic) and that did the same.

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• why the next button doesn't work in Joomla! 2.5.4 Installation [closed]

  - by rahul

  I was trying to insall the Joomla! 2.5.4 Installation. But I got stucked in the first step only. The button doesn't respond on clicks. I tried previous version like 1.5.26. But here also the process got hang after the 3rd step. In the 4th step the next button doesn't work as before. what to do, I am in dilemma. I am using XAMPP server for my localhost,please guide me, I lost complete one day in installing Joomla.

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• HTML5 - check if font has loaded

  - by espais

  At present I load my font for my game in with @font-face For instance: @font-face { font-family: 'Orbitron'; src: url('res/orbitron-medium.ttf'); } and then reference it throughout my JS implementation as such: ctx.font = "12pt Orbitron"; where ctx is my 2d context from the canvas. However, I notice a certain lag time while the font is downloaded to the user. Is there a way I can use a default font until it is loaded in? Edit - I'll expand the question, because I hadn't taken the first comment into account. What would the proper method of handling this be in the case that a user has disabled custom fonts?

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• How do I interview Front-end focused web developers?

  - by Civilian

  For the first time I'm in the position where I'm helping interview potential front-end developers. (The other interviewer is more business & PM-focused, although he is a former developer.) I probe for knowledge and background in css, js, and other related technologies, but those questions are really just testing for lingo. I feel that it'd be unfair to ask very specific questions about css when we're not infront of a computer, because my style of programming css is a lot of guesswork. I've also been given websites that these web developers have written-- is that enough to go on for interviewing front-ends? We're also looking for general aptitude, rather than a databank of knowledge.

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• Switching my legacy desktop back to Windows XP from Windows 7

  - by Kevin Shyr

  I was happy with Windows 7 at the beginning, until I started to add in the peripherals.  Windows 7 was never able to recognize any of my PCI video card (I know, I know, we should be in the DVI age). Anyway, I went through another 4 days of trouble setting my computer up with dual monitor in XP (also did a bunch of other things like getting rid of my sound card and taking the computer off RAID. Kind of feel stupid to put the computer on RAID in the first place because now I can have 2 drives: double the page files program seems to run faster Microsoft Sync toy 2.1 takes care of my backup needs (Thank god they solved the network drive issue) As of last night, the system is running beautifully.  I still have a laptop with Windows 7, but even that is in dual boot mode.

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• Places to share my new blog entry? [closed]

  - by TomasAlabes

  I started yesterday a tech blog called devhike and as my first entry I explained a palette behaviour made with RaphaelJS. I wanted to share the entry the tech people around the world, to see if they like it, find it useful, etc. I submitted the link to my post in dzone.com and hackernews which are the places from where I like to read tech articles, but I feel there should be other places where I could post my blog or entry too. If not, I feel my blog will never be read. Do you know any places or ways to be read?

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• What is an effective way to organize tasks for a new project?

  - by Dulan

  Is there a practical solution to organizing the initial tasks for a new project? To elaborate, imagine the features/stories/goals are laid out for a project. How might one go about organizing those into sane tasks for the first few versions? The scenario I typically have in mind has the features listed as a high-level reference for what the end user-experience should involve. The tasks for constructing such features are then broken down into chunks (such as "create interface for X component"). Such a task is not necessarily "tied" to only that feature and may be useful when building subsequent features. Is breaking features down into small, code-able solutions valid? Or should they be slightly removed from any specific implementation? I do not expect that there is one "right" answer to this question, but I am looking for a fairly pragmatic and unobtrusive approach. As a note, I'm looking for solutions that are independent of any tools or "systems" used for managing the tasks themselves.

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• How to Organize Subdirectories? [closed]

  - by Gary Iverson

  I am working on my first major (several hundred pages) website design and development project. I want to create subdirectories for each of the website's categories, which in turn have their own subdirectories for easy user navigation. Example: website.com/directory. I am aware that by placing an index.html file within each directory, the browser automatically detects and navigates to that page, but that seems like a messy solution (having multiple index.html files, albeit in distinct folders), and I cannot imagine everyone does that. So my question is...how do you properly organize and use subdirectories?

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• Quickly Investigating What's in the Tables of SQL Server Databases

  From SQL Server Management Studio it's hard to look through the first few rows of a whole lot of tables in a database. This is odd, since it is a great way to get quickly familiar with a database. Phil tidied up a SQL routine he uses to investigate databases quickly in a browser. He explains how to use it, how it works, and how to use it from PowerShell. Want faster, smaller backups you can rely on?Use SQL Backup Pro for up to 95% compression, faster file transfer and integrated DBCC CHECKDB. Download a free trial now.

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• can't connect to t

  - by Jorge Jimenez

  I installed, today 10/05/12, for the first time. I've used Windows for several years. Well, it's not as user friendly as some people claim. I decided to give it a try but it's very upsetting that everything seems to be OK with my wireless connection, I'm connected, and I just can not connect to the internet. When I open Firefox I get the message "Server not found". Help please! I never had this problems with Windows.

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• Steps to rebuild gspca_kinect driver module?

  - by Bobby Ray

  I recently purchased a Kinect for Windows and quickly discovered that the camera drivers included in linux kernel 3.0+ aren't compatible with the Kinect for Windows hardware revision. After looking at the source code it seems like a tiny modification is all that is required for compatibility, so I've been trying to recompile the driver - to no avail. I've been referring to this article and this one as well, though they are a bit outdated. When I try to compile the module, I get an error because the header file "gspca.h" can't be found in the include path. I located the missing header in my filesystem, but the file itself is empty. I've also tried downloading the kernel source (3.2.0-24-generic), which allowed me to compile the module, but when I load the module I get an error. -1 Unknown symbol in module Is there a standard way to go about this without first building the kernel? Will building the kernel ensure that I can build the module? Thanks

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• How to design a game engine in an object-oriented language?

  - by chuzzum

  Whenever I try and write a game in any object-oriented language, the first problem I always face (after thinking about what kind of game to write) is how to design the engine. Even if I'm using existing libraries or frameworks like SDL, I still find myself having to make certain decisions for every game, like whether to use a state machine to manage menus, what kind of class to use for resource loading, etc. What is a good design and how would it be implemented? What are some tradeoffs that have to be made and their pros/cons?

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• Does a lead-to screen with AdSense ad conform to Google's rules?

  - by ElHaix

  Re: Google's ad placement policy I have noticed that when clicking on some Forbes links, I am taken to a screen with an ad in the middle - at the top there is a link to skip the ad. Upon clicking on the skip link I am taken to the article I want to view. I want to implement something similar on my sites, where, when clicking on a search result, a the results window first displays one AdSense add on the screen with a similar UI as what I saw on Forbes. Currently, when a user clicks on a result, a new tab/window opens with the result. What I am proposing is that before the result appears, the screen displays a "Continue to result" link at the top in large letters, and in the center of the page, "Advertisement" with the ad below. This is the only popup that is user initiated and there are no other popups on the site. Navigation elements are not modified in any way. Will I get penalized by Google for implementing this?

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• Type Conversion in JPA 2.1

  - by delabassee

  The Java Persistence 2.1 specification (JSR 338) adds support for various new features such as schema generation, stored procedure invocation, use of entity graphs in queries and find operations, unsynchronized persistence contexts, injection into entity listener classes, etc. JPA 2.1 also add support for Type Conversion methods, sometime called Type Converter. This new facility let developers specify methods to convert between the entity attribute representation and the database representation for attributes of basic types. For additional details on Type Conversion, you can check the JSR 338 Specification and its corresponding JPA 2.1 Javadocs. In addition, you can also check those 2 articles. The first article ('How to implement a Type Converter') gives a short overview on Type Conversion while the second article ('How to use a JPA Type Converter to encrypt your data') implements a simple use-case (encrypting data) to illustrate Type Conversion. Mission critical applications would probably rely on transparent database encryption facilities provided by the database but that's not the point here, this use-case is easy enough to illustrate JPA 2.1 Type Conversion.

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