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  • Installing raid 5 on a pre-installed ubuntu server. 12.04

    - by Chris
    I have a ubuntu server with samba already set up and installed with a 1tb hdd. I am wanting to now install 3 more 1tb drives and create a raid array using raid 5. I have found a lot of documentation about installing raid when installing and setting up ubuntu server for the first time. However, I am struggling to find anything on installing a raid 5 array on a system already installed an configured. Can this be done, or does a clean install need to be done again?

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  • Relationship between TDD and Software Architecture/Design

    - by Christopher Francisco
    I'm new to TDD and have been reading the theory since applying it is more complicated than it sounds when you're learning by yourself. As far as I know, the objective is to write test cases for each requirement and run the test so it fails (to prevent a false positive). Afterward, you should write the minimum amount of code that can pass the test and move to the next one. That being said, is it true that you get a fast development, but what about the code itself? this theory makes me think you are not considering things like abstraction, delegation of responsibilities, design patterns, architecture and others since you're just writing "the minimum amount of code that can pass the test". I know I'm probably wrong because if this were true, we'd have a lot of crappy developers with poor software architecture and documentation so I'm asking for a guide here, what's the relationship between TDD and Software Architecture/Design?

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  • Learning Smalltalk as a Java programmer

    - by VeeKay
    I am a Java programmer willing to learn smalltalk. As of now I am working within the Pharo environment. Trying to switch from Java to Smalltalk is being a bit of a headache, honestly. I would like to learn Smalltalk with the help of a code base available but I believe that there aren't many Smalltalk example projects available on the web. So are there any particular websites that involve learning Smalltalk (Pharo) based on some simple examples? Currently I am taking the help of Pharo By Example doc but I feel it is just not sufficient for me. I am looking for more some code examples in Smalltalk.

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  • Python scripts link to GUI using an IDE

    - by YomalSamindu
    I am studying python. Now I can write python scripts(codes) to some extent. I am interested in making GUI to those written programs.I like to do it using an IDE rather than using PyGTK or Tkinter. Can anyone help me how to start with this and link my scripts to a GUI. I downloaded a IDE called "glade". But I don't know how to use this IDE. I need some tutorial guide also. Can anyone help me.Please.Thank you!

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  • Inside Red Gate - Ricky Leeks

    - by Simon Cooper
    So, one of our profilers has a problem. Red Gate produces two .NET profilers - ANTS Performance Profiler (APP) and ANTS Memory Profiler (AMP). Both products help .NET developers solve problems they are virtually guaranteed to encounter at some point in their careers - slow code, and high memory usage, respectively. Everyone understands slow code - the symptoms are very obvious (an operation takes 2 hours when it should take 10 seconds), you know when you've solved it (the same operation now takes 15 seconds), and everyone understands how you can use a profiler like APP to help solve your particular problem. High memory usage is a much more subtle and misunderstood concept. How can .NET have memory leaks? The garbage collector, and how the CLR uses and frees memory, is one of the most misunderstood concepts in .NET. There's hundreds of blog posts out there covering various aspects of the GC and .NET memory, some of them helpful, some of them confusing, and some of them are just plain wrong. There's a lot of misconceptions out there. And, if you have got an application that uses far too much memory, it can be hard to wade through all the contradictory information available to even get an idea as to what's going on, let alone trying to solve it. That's where a memory profiler, like AMP, comes into play. Unfortunately, that's not the end of the issue. .NET memory management is a large, complicated, and misunderstood problem. Even armed with a profiler, you need to understand what .NET is doing with your objects, how it processes them, and how it frees them, to be able to use the profiler effectively to solve your particular problem. And that's what's wrong with AMP - even with all the thought, designs, UX sessions, and research we've put into AMP itself, some users simply don't have the knowledge required to be able to understand what AMP is telling them about how their application uses memory, and so they have problems understanding & solving their memory problem. Ricky Leeks This is where Ricky Leeks comes in. Created by one of the many...colourful...people in Red Gate, he headlines and promotes several tutorials, pages, and articles all with information on how .NET memory management actually works, with the goal to help educate developers on .NET memory management. And educating us all on how far you can push various vegetable-based puns. This, in turn, not only helps them understand and solve any memory issues they may be having, but helps them proactively code against such memory issues in their existing code. Ricky's latest outing is an interview on .NET Rocks, providing information on the Top 5 .NET Memory Management Gotchas, along with information on a free ebook on .NET Memory Management. Don't worry, there's loads more vegetable-based jokes where those came from...

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  • How can I Instal shockwave on Ubuntu

    - by Navjot Singh
    I got this computer from someone and it had ubuntu installed on it. I like it but I find it complicated and I have been trying to download and every time I try to install something an error comes up Archive: /home/singh/Downloads/Shockwave_Installer_Full.exe [/home/singh/Downloads/Shockwave_Installer_Full.exe] End-of-central-directory signature not found. Either this file is not a zipfile, or it constitutes one disk of a multi-part archive. In the latter case the central directory and zipfile comment will be found on the last disk(s) of this archive. zipinfo: cannot find zipfile directory in one of /home/singh/Downloads/Shockwave_Installer_Full.exe or /home/singh/Downloads/Shockwave_Installer_Full.exe.zip, and cannot find /home/singh/Downloads/Shockwave_Installer_Full.exe.ZIP, period. Please help me uninstall ubuntu and get Windows back or help me get these downloads to work.

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  • Tips/Process for web-development using Django in a small team

    - by Mridang Agarwalla
    We're developing a web app uing Django and we're a small team of 3-4 programmers — some doing the UI stuff and some doing the Backend stuff. I'd love some tips and suggestions from the people here. This is out current setup: We're using Git as as our SCM tool and following this branching model. We're following the PEP8 for your style guide. Agile is our software development methodology and we're using Jira for that. We're using the Confluence plugin for Jira for documentation and I'm going to be writing a script that also dumps the PyDocs into Confluence. We're using virtualenv for sandboxing We're using zc.buildout for building This is whatever I can think of off the top of my head. Any other suggestions/tips would be welcome. I feel that we have a pretty good set up but I'm also confident that we could do more. Thanks.

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  • Cocos3d lighting problem

    - by Parasithe
    I'm currently working on a cocos3d project, but I'm having some trouble with lighting and I have no idea how to solve it. I've tried everything and the lighting is always as bad in the game. The first picture is from 3ds max (the software we used for 3d) and the second is from my iphone app. http://prntscr.com/ly378 http://prntscr.com/ly2io As you can see, the lighting is really bad in the app. I manually add my spots and the ambiant light. Here is all my lighting code : _spot = [CC3Light lightWithName: @"Spot" withLightIndex: 0]; // Set the ambient scene lighting. ccColor4F ambientColor = { 0.9, 0.9, 0.9, 1 }; self.ambientLight = ambientColor; //Positioning _spot.target = [self getNodeNamed:kCharacterName]; _spot.location = cc3v( 400, 400, -600 ); // Adjust the relative ambient and diffuse lighting of the main light to // improve realisim, particularly on shadow effects. _spot.diffuseColor = CCC4FMake(0.8, 0.8, 0.8, 1.0); _spot.specularColor = CCC4FMake(0, 0, 0, 1); [_spot setAttenuationCoefficients:CC3AttenuationCoefficientsMake(0, 0, 1)]; // Another mechansim for adjusting shadow intensities is shadowIntensityFactor. // For better effect, set here to a value less than one to lighten the shadows // cast by the main light. _spot.shadowIntensityFactor = 0.75; [self addChild:_spot]; _spot2 = [CC3Light lightWithName: @"Spot2" withLightIndex: 1]; //Positioning _spot2.target = [self getNodeNamed:kCharacterName]; _spot2.location = cc3v( -550, 400, -800 ); _spot2.diffuseColor = CCC4FMake(0.8, 0.8, 0.8, 1.0); _spot2.specularColor = CCC4FMake(0, 0, 0, 1); [_spot2 setAttenuationCoefficients:CC3AttenuationCoefficientsMake(0, 0, 1)]; _spot2.shadowIntensityFactor = 0.75; [self addChild:_spot2]; I'd really appreciate if anyone would have some tip on how to fix the lighting. Maybe my spots are bad? maybe it's the material? I really have no idea. Any help would be welcomed. I already ask some help on cocos2d forums. I had some answers but I need more help.

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  • hardy alternate cd customization and ubuntu-keyring-udeb

    - by gokul
    I have been trying to customize Ubuntu 8.04 (hardy heron) alternate install cd. I have followed the community documentation at https://help.ubuntu.com/community/InstallCDCustomization#Generating_a_new_ubuntu-keyring_.deb_to_sign_your_CD to rebuild the ubuntu-keyring packages. But when the media boots I get a warning: anna[7581]: WARNING **: bad md5sum. Though I have not been able to confirm that the message is for the ubunu-keyring-udeb package, the nearest debconf Adding [package] message is for ubuntu-keyring-udeb. This is followed by: INPUT critical retriever/cdrom/error. This message is already from syslog. I don't think dpkg.log will help in this case. I have tried modifying the md5sum file within the source package manually and signing it with my own public key, before building it. But that has not helped either. How do get the installer to work in this scenario? Alternatively, can I customize the contents of Ubuntu8.04 without signing anything?

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  • cannot play VTC video file (.mov) using VLC player

    - by varunit
    I have a training course contains .mov files which have video codec as apple graphics smc. I have googled and found out to add these options to play them link from where I got help But they are playing fine only in SMplayer. I want to configure similarly and play those files in VLC player. This is the error which I'm facing Running vlc with the default interface. Use 'cvlc' to use vlc without interface. [0xb0d03d20] blend blend error: no matching alpha blending routine (chroma: RGBA - RGBP) [0xb0d03d20] main blend error: blending RGBA to RGBP failed It is repeating... Thanks for any help...

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  • Expression Blend 4 available and training resources

    - by pluginbaby
    As you may know Expression Blend 4 has shipped! It is still part of Expression Studio, which now comes in 2 “flavors”: Expression Studio 4 Ultimate Expression Blend SketchFlow Expression Web + SuperPreview Expression Encoder Expression Design Expression Studio 4 Web Professional Expression Web + SuperPreview Expression Encoder Expression Design So the version you want for Silverlight is Expression Studio 4 Ultimate (because you can’t buy Expression Blend alone). Expression Blend is an awesome tool but might be difficult to approach at first, specially for people coming from Visual Studio… this tool target designers so it can takes time for a developer to get comfortable enough. Good news is the availability of a free “Blend Fundamentals Training” which contains plenty of resources to help you master Expression Blend in 5 days: http://www.microsoft.com/expression/resources/BlendTraining/   Also don’t forget the .toolbox: http://www.microsoft.com/design/toolbox/ This Microsoft website contains courses and tutorials to help you learn UI Design for Silverlight with Expression Blend.

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  • How do I set up a "gateway" for a specific subdomain?

    - by Mason Wheeler
    I'm looking at setting up a website that will run a few different apps. Most of them can be managed by an Apache server, but I've got one specific thing that will run on a custom HTTP server. Looking around on apache.org, it looks like you can use mod_proxy to configure Apache to act as a "reverse proxy" and forward requests from a specific subdirectory to a new server with the ProxyPass directive. So if I wanted send anything from mysite.com/special on to the custom server, that's how I would do it. But what if I want to set it up as a subdomain instead? The documentation doesn't seem to cover that. If, I wanted to make it forward anything from special.mysite.com to the new server, how would I set that up?

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  • Rendering CV template with XeLaTex

    - by jacob
    Installed kubuntu on thursday Installed LaTeX on my kubuntu machine, using full Compiled an old document and it worked fine Downloaded a CV template from http://www.latextemplates.com/template/two-column-one-page-cv Compiled it, got error Fatal fontspec error: "cannot-use-pdftex" The fontspec package requires either XeTeX or LuaTeX to function. You must change your typesetting engine to, e.g., "xelatex" or "lualatex" instead of plain "latex" or "pdflatex". See the fontspec documentation for further information. For immediate help type H . Installed XeLaTex using this guide http://ledgersmb.org/faq/xelatex i.e. 7 Installed texlive-xetex that includes xelatex apt-get install texlive-xetex apt-get install liblatex-{driver,encode,table}-perl apt-get install libtemplate-plugin-latex-per 8) Compiled CV template again, did not work. Related: No Xelatex in texlive 2012 Excuse me if my question is not clear enough, I'm new to linux.

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  • Adam Bien Testimonial at GlassFish Community Event, JavaOne 2012

    - by arungupta
    Adam Bien, a self-employed enterprise Java consultant, an author of five star-rated books, a presenter, a Java Champion, a NetBeans Dream Team member, a JCP member, a JCP Expert Group Member of several Java EE groups, and with several other titles is one of the most vocal advocate of the Java EE platform. His code-driven workshops using Java EE 6, NetBeans, and GlassFish have won accolades at several developers' conferences all around the world. Adam has been using GlassFish for all his projects for many years. One of the reasons he uses GlassFish is because of high confidence that the Java EE compliance bug will be fixed faster. He find GlassFish very capable application server for faster development and continuous deployment. His own media properties are running on GlassFish with an Apache front-end. Good documentation, accessible source code, REST/Web/CLI administration and monitoring facilities are some other reasons to pick GlassFish. He presented at the recently concluded GlassFish community event at JavaOne 2012. You can watch the video (with transcript) below showing him in full action:

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  • F# for the C# Programmer

    - by mbcrump
    Are you a C# Programmer and can’t make it past a day without seeing or hearing someone mention F#?  Today, I’m going to walk you through your first F# application and give you a brief introduction to the language. Sit back this will only take about 20 minutes. Introduction Microsoft's F# programming language is a functional language for the .NET framework that was originally developed at Microsoft Research Cambridge by Don Syme. In October 2007, the senior vice president of the developer division at Microsoft announced that F# was being officially productized to become a fully supported .NET language and professional developers were hired to create a team of around ten people to build the product version. In September 2008, Microsoft released the first Community Technology Preview (CTP), an official beta release, of the F# distribution . In December 2008, Microsoft announced that the success of this CTP had encouraged them to escalate F# and it is now will now be shipped as one of the core languages in Visual Studio 2010 , alongside C++, C# 4.0 and VB. The F# programming language incorporates many state-of-the-art features from programming language research and ossifies them in an industrial strength implementation that promises to revolutionize interactive, parallel and concurrent programming. Advantages of F# F# is the world's first language to combine all of the following features: Type inference: types are inferred by the compiler and generic definitions are created automatically. Algebraic data types: a succinct way to represent trees. Pattern matching: a comprehensible and efficient way to dissect data structures. Active patterns: pattern matching over foreign data structures. Interactive sessions: as easy to use as Python and Mathematica. High performance JIT compilation to native code: as fast as C#. Rich data structures: lists and arrays built into the language with syntactic support. Functional programming: first-class functions and tail calls. Expressive static type system: finds bugs during compilation and provides machine-verified documentation. Sequence expressions: interrogate huge data sets efficiently. Asynchronous workflows: syntactic support for monadic style concurrent programming with cancellations. Industrial-strength IDE support: multithreaded debugging, and graphical throwback of inferred types and documentation. Commerce friendly design and a viable commercial market. Lets try a short program in C# then F# to understand the differences. Using C#: Create a variable and output the value to the console window: Sample Program. using System;   namespace ConsoleApplication9 {     class Program     {         static void Main(string[] args)         {             var a = 2;             Console.WriteLine(a);             Console.ReadLine();         }     } } A breeze right? 14 Lines of code. We could have condensed it a bit by removing the “using” statment and tossing the namespace. But this is the typical C# program. Using F#: Create a variable and output the value to the console window: To start, open Visual Studio 2010 or Visual Studio 2008. Note: If using VS2008, then please download the SDK first before getting started. If you are using VS2010 then you are already setup and ready to go. So, click File-> New Project –> Other Languages –> Visual F# –> Windows –> F# Application. You will get the screen below. Go ahead and enter a name and click OK. Now, you will notice that the Solution Explorer contains the following: Double click the Program.fs and enter the following information. Hit F5 and it should run successfully. Sample Program. open System let a = 2        Console.WriteLine a As Shown below: Hmm, what? F# did the same thing in 3 lines of code. Show me the interactive evaluation that I keep hearing about. The F# development environment for Visual Studio 2010 provides two different modes of execution for F# code: Batch compilation to a .NET executable or DLL. (This was accomplished above). Interactive evaluation. (Demo is below) The interactive session provides a > prompt, requires a double semicolon ;; identifier at the end of a code snippet to force evaluation, and returns the names (if any) and types of resulting definitions and values. To access the F# prompt, in VS2010 Goto View –> Other Window then F# Interactive. Once you have the interactive window type in the following expression: 2+3;; as shown in the screenshot below: I hope this guide helps you get started with the language, please check out the following books for further information. F# Books for further reading   Foundations of F# Author: Robert Pickering An introduction to functional programming with F#. Including many samples, this book walks through the features of the F# language and libraries, and covers many of the .NET Framework features which can be leveraged with F#.       Functional Programming for the Real World: With Examples in F# and C# Authors: Tomas Petricek and Jon Skeet An introduction to functional programming for existing C# developers written by Tomas Petricek and Jon Skeet. This book explains the core principles using both C# and F#, shows how to use functional ideas when designing .NET applications and presents practical examples such as design of domain specific language, development of multi-core applications and programming of reactive applications.

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  • Collision library for bullet hell in Python

    - by darkfeline
    I am making a bullet hell game in Python and am looking for a suitable collision library, taking the following into consideration: The library should do 2D polygon collision. It should be very fast. As a bullet hell game, I expect to do collision checks between hundreds, likely thousands of objects every frame at a consistent 60fps. Good documentation Permissive license (like MIT, not GPL) I am also considering writing my own library in C/C++ and wrapping with python ctypes in the event that no such library exists, though I do not have experience with collision detection algorithms, so I am not sure if this would be more trouble than it's worth. Could someone provide some guidance on this matter?

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  • Installing Ubuntu 12.04 on EFI system

    - by aniruddhabhide
    Fellas, need help. Trying to install Ubuntu 12.04 on laptop to dual boot alongside Win7. I have UEFI and GPT partitioning scheme. It has optional Legacy boot mode though. I can boot from Ubuntu USB/CD in both Legacy and UEFI modes. But when I reach partition selection step, it gives me error "ubi-partman failed with exit code 141". I searched forums for this but those who encountered this error said it was resolved when they detached one of two HDs in their system. But I have only one hard disk attached and I am sure Ubuntu's GRUB supports GPT. But looks like it is not able to read GPT partitions on my HD. Any help regarding this will be appreciated.

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  • Windows 8: Everything from design, build, and how to sell a Metro style app

    - by Thomas Mason
    For me, there are a lot of similarities between an application developed for Windows Phone and a Metro style app developed for Windows 8. A Windows Phone 7 application (rather than an XNA game) is built in .NET and XAML against a subset of the .NET framework and the application has a lifecycle which needs to be conscious of battery life and so is split out into foreground/background pieces. The application is sandboxed in terms of its interactions with the local device and is packaged with a manifest which describes those interactions. The app needs to be aware of network connectivity status and its work on the network is done asynchronously to preserve the user experience.The app is packaged and deployed to a Marketplace which the user browses to find the app, read reviews, perhaps purchase it and then install it and receive updates over time. Quite a lot of those statements are as true of a Windows 8 Metro style app as they are for a Windows Phone app and so a Windows Phone app developer already has a good head start when it comes to building Metro style apps for Windows 8. With that in mind, there is an event to help developers with a Windows Phone app in Marketplace to begin the process of looking at Windows 8 and whether you can get a quick win by bringing your Phone application onto Windows. The idea of the event was to provide a space where developers can get together over 2 days and take the time out to look at what it means to take their app from Windows Phone to Windows 8. Kicking off on Saturday 16th June at 10am, we are told they have plenty of power sockets, WiFi, whiteboards, drinks, pizza, games, prizes and some quiet space that you can work in. Including people on hand with Windows Phone and Windows 8 experience to help everything along the way. There will be an attendee-voted schedule of talks but we’ll keep these out of your way if you just want to get on and code. We’ll also provide information around submitting your app to the Windows Store If you have a Windows Phone app in Marketplace, now’s a great time to look at getting it onto Windows 8. Sign up. Bring your laptop. Bring your app. Bring Windows 8 and Visual Studio 11. And everyone will their best to help you get your app onto Windows 8. Location & Venue TBA but it will be in central London, accessible by major railway and underground transportation. Day 1 Saturday 16th June 10am – 9pm Day 2 Sunday 17th June 10am – 4pm

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  • Using the AccountsService API with Python

    - by pabluk
    I'm writing an application for the Ubuntu app showdown and I try to read/write the user's profile picture using this >>> from gi.repository import AccountsService, GLib >>> current_user = GLib.get_user_name() >>> user = AccountsService.UserManager.get_default().get_user(current_user) >>> print user.get_icon_file() None >>> print user.get_user_name() None But apparently does not work. Is there another way to use AccountsService with Python? I could not find more documentation about AccountsService and Python.

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  • Is osTicket secure/private enough

    - by Andy
    I was going to use osTicket as my 'help desk' for my website, however I just got a little bit concerned when I realised that the clients' login details to see their support tickets are only their email address and a ticket ID. I am probably going over the top with security though, which is why I wanted to get some second opinions on how secure osTicket actually is and whether I should use it with my website. I run a software company, so chances are licence keys may be included in support tickets which are obviously sensitive information and valuable - so I want to ensure that the likelihood of a support ticket being hacked is very low. If there is any plugins/additions to make osTicket more 'secure', I would appreciate it if you could point me to them. Otherwise if there are any more free, more suited, help desk softwares out there please let me know. Thanks in advance

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  • Ubuntu Server 14.04 Apache 2.4 TLSv1.2/TLSv1.1 support

    - by Jan
    Recently I upgraded my server from Ubuntu Server 12.04 to Ubuntu Server 14.04 by means of a new installation from scratch. Only one problem remains. In 12.04 Apache 2.2 with mod_ssl supported TLS version 1, 1.1 and 1.2. After upgrading to 14.04 and Apache 2.4, Apache only supports TLS version 1, support for 1.1 and 1.2 is missing. I followed both the migration guide for 2.2 - 2.4 (no changes to the mod_ssl settings) as well as the documentation of mod_ssl regarding the SSLProtocol configuration option. Both SSLProtocol TLSv1.2 TLSv1.1 TLSv1 and SSLProtocol TLSv1.2 do not work. Is there any way to convince Apache to support the new TLS versions as well? Problem seems to be solved now without any change from my side. Apparently libssl was initially compiled without TLSv1.1/TLSv1.2 support.

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