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• file error /boot/grub/i386-pc/normal.mod trying to repair boot, live dvd install probleml

  - by user179295

  I have seen that there are a lot of threads about this problem. I had Windows 8 installed on my series 3 samsung i5 computer and I tried to install ubuntu 13.04. This is what I did: Because of the secure boot I can't install ubuntu from the dvd. So I went in the bios and disabled secure boot and enabled ''CSM''. I went out of the bios and windows 8 couldn't boot more. So I follow a guide on this thread ( Installing on a Pre-Installed Windows 8 System (UEFI Supported) ) and on ubuntu I tried to repair the boot by inserting this code in the terminal: sudo add-apt-repository ppa:yannubuntu/boot-repair sudo apt-get update sudo apt-get install boot-repair Then I ran boot-repair and I follow all the steps. Then I reboot the sistem and saw the black screen that says: error: file '/boot/grub/i386-pc/normal mod' not found grub rescure> Now I saw a lot of guides about this problem but I can't understand how to reistall ubuntu trough the live dvd that I used to install it the first time... I put it in the computer but nothing appears.. so what should I do now? I'm a noob on ubuntu and I have read all the things about this grub 2 install and know where the problem comes from but how to start the dvd??

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• Back up Windows 2008 SBS to iSCSI disk

  - by Farseeker

  I've almost no experience with SBS 2008, so please excuse my noob question! SBS 2008 only has the most basic backup utility built in as far as I can tell (similar to Vista), and it will only back up to physical volumes. I've read that you can set up a batch task to backup to a network volume, but right now I just need to get something deployed ASAP. We have an iSCSI target with plenty of free space. Is it worth backing up to an iSCSI target? Or am I wasting my time? If I need to do a recovery from the iSCSI disk, how would I go about it?

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• New XEN Server, Intel i7, Errors were encountered while processing: xen-linux-system-amd64

  - by Sheldon

  I have just got a new machine to run XEN VM's on, it has an Intel i7 processor: - Intel Haswell Core i7-4790 3.6GHz 8MB LGA1150 I have setup the host with the current 6.2.0 I have set up a new Debian 7 64bit VM and any package I try and run fails with the following errors: Errors were encountered while processing: xen-utils-common xen-utils-4.1 xen-system-amd64 xen-linux-system-3.2.0-4-amd64 xen-linux-system-amd64 E: Sub-process /usr/bin/dpkg returned an error code (1) Excuse my noob-ness but should it even be running an AMD package ? Any ideas on how to fix this ? Thanks

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• Ubuntu eats itself after I followed updater instruction

  - by Tony Martin

  Updater (I assume) put a no entry style alert icon on the panel which informed me that certain package dependencies were not up to snuff. Upgrades were thereafter only partial. The dialogue advised that I (and this is from noob memory) sudo apt-get install -f. I did this and typed in the confirmation phrase and watched apt-get systematically remove every component of linux, both the stuff I installed and the core ubuntu packages. I could only assume at this stage that this was for a fresh install but of course, I know better now. There's much complaint about Windows, but I've never met with advice from Microsoft tools to wipe out the operating system because of a couple of missing .dlls. So what gives? This was a 64 bit install of 12.04. All that is left is grub pointing to a couple of windows recovery partitions on the hard drive. I'm tempted, but I have hopes of recovering the data that I had enough misguided faith to trust to the linux ext4 partition. I've tried pen driving back into it with a 32 bit iso but I'm simply informed that ubuntu is running in low graphics mode and get to watch the dots cycle indefinitely. EDIT: Thanks for the advice vis positive request. I've got onto the machine with a 64 bit stick and can see the file structure left behind by the installation. My first instinct was to run install from the stick but it did not seem to offer a recovery option. My question then: is there a way to recover the current installation so that if I reinstall the packages I had they will pick up the original settings. I'm particularly worried about losing email from evolution - the rest I could probably lash back together. I would also be interested how this disaster came about. I see people in the know recommending this same procedure in similar circumstances. Thanks for your attention, Tony Martin

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• Which operating systems book is good as a quick refresher?

  - by rdasxy

  I am preparing for a technical interview and need to review the basics of major operating systems concepts. We used Tanenbaum's Modern Operating Systems in school for our operating systems course, which is a good book, but too long to be reviewed in the course of a few days. For an example, I am looking for what Programming Interviews Exposed is to Weiss's Data Structures & Algorithm Analysis. Any suggestions?

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• Bullet physics in python and pygame

  - by Pomg

  I am programming a 2D sidescroller in python and pygame and am having trouble making a bullet go farther than just farther than the player. The bullet travels straight to the ground after i fire it. How, in python code using pygame do I make the bullet go farther. If you need code, here is the method that handles the bullet firing: self.xv += math.sin(math.radians(self.angle)) * self.attrs['speed'] self.yv += math.cos(math.radians(self.angle)) * self.attrs['speed'] self.rect.left += self.xv self.rect.top += self.yv

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• Oracle Coherence 3.5 PreSales Boot Camp - Live Virtual Training (12-13/Mai/10)

  - by Claudia Costa

  Oracle Coherence is an in-memory data grid solution that enables organizations to predictably scale mission-critical applications by providing fast access to frequently used data. By automatically and dynamically partitioning data, Oracle Coherence ensures continuous data availability and transactional integrity, even in the event of a server failure. It provides organizations with a robust scale-out data abstraction layer that brokers the supply and demand of data between applications and data sources. Register today!   What will we cover The Oracle Coherence 3.5 Boot Camp is a FREE workshop which provides a quick hands-on technical ramp up on Oracle Coherence Data Grid.The Boot Camp provides a product overview, positioning and demo, discussion of customer uses and hands on lab work. Participants will leave the Oracle Coherence Boot Camp with a solid understanding of the product and where and how to apply it.It will provide an overview of the product as well as hands-on lab work.   • Architecting applications for scalability, availability, and performance • Introduction to Data Grids and Extreme Transaction Processing (XTP) • Coherence Case Studies • Oracle Coherence Product Demonstration • Coherence implementation strategies and architectural approaches • Coherence product features and APIs • Hands-on labs that will include product installation, configuration, sample applications, code examples, and more.   Who should attend This boot camp is intended for prospective users and implementers of Oracle Coherence Data Grid or implementers that have had limited exposure to Coherence and seek to gain a Technical Overview of the product with hand on exercises. Ideal participants are Oracle partners (SIs and resellers) with backgrounds in business information systems and a clientele of customers with ongoing or prospective application and/or data grid initiatives. Alternatively, partners with the background described above and an interest in evolving their practice to a similar profile are suitable participants.   Prerequisites and Workstation requirements There are no prerequisite classes for this Boot Camp. However, labs rely upon usage of the Java programming language. Therefore participants should be familiar with the Java language or similar Object Oriented programming languages. Additionally, students experience with enterprise data storage and manipulation is and knowledge of relevant concepts will benefit most from the boot camp. In order to attend this boot camp you need to have the necessary software installed on your laptop prior to attending the class. Please revise the Workstation Requirements page and register today! Agenda - May 12 - 8:30 May 13 - 12:30 *To view the full agenda and to register click here.    

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• Which web algorithms book to get ?

  - by fjxx

  I am currently undecided between which of the following web algorithms book to buy: 1) Algorithms of the Intelligent web by Marmanis 2) Collective Intelligence by Alag Both feature code in Java; Marmanis' book delves deeper into the core algorithms while Alag's book discusses more APIs including WEKA. I have already read Programming Collective Intelligence by Segaran and enjoyed it. Any comments on these books or any other recommendations are welcome.

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• How do you structure computer science University notes?

  - by Sai Perchard

  I am completing a year of postgraduate study in CS next semester. I am finishing a law degree this year, and I will use this to briefly explain what I mean when I refer to the 'structure' of University notes. My preferred structure for authoring law notes: Word Two columns 0.5cm margins (top, right, bottom, middle, left) Body text (10pt, regular), 3 levels of headings (14/12/10pt, bold), 3 levels of bulleted lists Color A background for cases Color B background for legislation I find that it's crucial to have a good structure from the outset. My key advice to a law student would be to ensure styles allows cases and legislation to be easily identified from supporting text, and not to include too much detail regarding the facts of cases. More than 3 levels of headings is too deep. More than 3 levels of a bulleted list is too deep. In terms of CS, I am interested in similar advice; for example, any strategies that have been successfully employed regarding structure, and general advice regarding note taking. Has latex proved better than Word? Code would presumably need to be stylistically differentiated, and use a monospaced font - perhaps code could be written in TextMate so that it could be copied to retain syntax highlighting? (Are notes even that useful in a CS degree? I am tempted to simply use a textbook. They are crucial in law.) I understand that different people may employ varying techniques and that people will have personal preferences, however I am interested in what these different techniques are. Update Thank you for the responses so far. To clarify, I am not suggesting that the approach should be comparable to that I employ for law. I could have been clearer. The consensus so far seems to be - just learn it. Structure of notes/notes themselves are not generally relevant. This is what I was alluding to when I said I was just tempted to use a textbook. Re the comment that said textbooks are generally useless - I strongly disagree. Sure, perhaps the recommended textbook is useless. But if I'm going to learn a programming language, I will (1) identify what I believe to be the best textbook, and (2) read it. I was unsure if the combination of theory with code meant that lecture notes may be a more efficient way to study for an exam. I imagine that would depend on the subject. A subject specifically on a programming language, reading a textbook and coding would be my preferred approach. But I was unsure if, given a subject containing substantive theory that may not be covered in a single textbook, people may have preferences regarding note taking and structure.

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• Forced Learning

  - by Ben Griswold

  If you ask me, it can be a little intimidating to stand in front of a group and walkthrough anything remotely technical. Even if you know “Technical Thingy #52” inside and out, public speaking can be unsettling.  And if you don’t have your stuff together, well, it can be downright horrifying. With that said, if given the choice, I still like to schedule myself to present on unfamiliar topics. Over the past few months, I’ve talked about Aspect-Oriented Programming, Functional Programming, Lean Software Development and Kanban Systems, Domain-Driven Design and Behavior Driven Development.  What do these topics have in common? You guessed it: I was truly interested in them. I had only a superficial understanding of each. Huh?  Why in the world would I ever want to to put myself in that intimidating situation? Actually, I rarely want to put myself into that situation but I often do as I like the results.  There’s nothing remotely clever going on here.  All I’m doing is putting myself into a compromising situation knowing that I’ll likely work myself out of it by learning the topic prior to the presentation.  I’m simply time-boxing myself to learn something new while knowing there are negative repercussions if I fall short. So, I end up doing tons of research and I learn bunches to ensure I have my head firmly wrap around the material before my talk. I’m not saying I become an expert overnight (or over a couple of weeks) but I’ll definitely know enough to be confident and comfortable and I’ll know more than enough to ensure the audience will learn a thing or two from me. It’s forced learning and though it might sound a little scary to some, it works for me. Now I could very easily rename this post to something like Fear Is My Motivator because, in a sense, fear of failure and embarrassment is what’s driving my learning. However, I’m the guy signing up for the presentation and since the entire process is self-imposed I’m not sure Fear deserves too much credit.  Anyway…

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• APress Deal of the Day 31/Jul/2013 - Pro ASP.NET MVC 4

  - by TATWORTH

  Originally posted on: http://geekswithblogs.net/TATWORTH/archive/2013/07/31/apress-deal-of-the-day-31jul2013---pro-asp.net-mvc.aspxToday's $10 deal of the day from APress at http://www.apress.com/9781430242369 is Pro ASP.NET MVC 4"The ASP.NET MVC 4 Framework is the latest evolution of Microsoft’s ASP.NET web platform. It provides a high-productivity programming model that promotes cleaner code architecture, test-driven development, and powerful extensibility, combined with all the benefits of ASP.NET"

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• Can't find my.cnf on my VPS

  - by dan

  Ok i am a total noob when it comes to servers (but eager to learn). I am renting a VPS so i can host a magento store. The VPS is using Centos5 and DirectAdmin and XEN virtualization. I've read a bit about how to optimize magento and one suggestion is to edit 'my.cnf'. However i can't find this file anywhere from within DirectAdmin. I also can't connect to the VPS via console as my host has a console access via their website but it won't let me enter my root password it just hangs...(how do people normally connected to their linux VPS?) Please help? ThankYou.

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• How to become a better programmer in 2011?

  - by Anish Patel

  Not strictly a Stack Overflow thing, but I thought I'd get it out there and ask the question. What are you as a programmer going to do to improve in 2011? The things I am planning to do are as follows: Learn Functional Programming Write 100 blog posts Take a bunch of Microsoft exams (70-433, 70-511, 70-513, 70-515, 70-516, 70-518, 70-519) Contribute to an open source project Lets hope the motivation lasts all year!

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• NSD Daemon (DNS SERVER)

  - by Catalin

  While searching for a secure dns server I came across this http://www.nlnetlabs.nl/projects/nsd/ I was really impressed by what seemed to me the best option out there that's open source. One problem thought their 'tutorial' is really NOT noob friendly I have basic DNS knoledge but what's in there is out of my league. Any help in setting up this DNS server please ? I need to have multiple sites on this CentOs server I've recently got my hands on :). They also need to receive email. Details: I have a master host and would love to set this in the way described in the rows that follow: masterhost.com -> ns1.masterhost.com mail.masterhost.com www.masterhost.com addonhost.com -> ns1.masterhost.com mail.masterhost.com www.addonhost.com And so on, all answers and suggestions are welcomed, Thank you in advance.

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• Does The College Matter?

  - by Jonathon

  Does it matter all that much about what college you go to, to get a degree in computer programming/computer science? I didn't do all that well in high school, I actually barely graduated with a general High School Diploma. So getting into a decent college could be difficult. Companies won't deny you just because you got your degree at a college they have never heard of or a community college will they?

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• Which points should be covered in basic Bachelors' level C++ course?

  - by Gulshan

  I have a young lecturer friend who is going to take the C++ course for the bachelors' degree in CS. He asked me for some suggestions regarding how the course should be organized. Now I am asking you. I have seen many trends in universities which leads to a nasty experience of C++. So, please suggest from a professional programmer's point of view. For your information, the students going to take the course, have taken course like "Introduction to programming with C" in previous semester.

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• adding mongo to path

  - by Mike

  Bit of a noob question. I have downloaded MongoDb and installed it here /Users/mike/downloads/mongodb In order to start it, I then have to 'cd' into the 'bin' /Users/mike/downloads/mongodb/bin and run ./mongod (to start the database) and ./mongo (to start the mongo shell) The problem is that I can only work with python and ruby scripts using the mongo shell if I have those scripts stored in the same bin directory, and I don't think that's the ideal set up. Will exporting the path allow me to access mongo from outside the bin? For example, I would prefer to have my ruby scripts in /sites/ruby and be able to access mongo by starting ruby in /sites/ruby. If exporting to path is the solution, how do I do that. I'm using a mac

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• How to implement line of sight restriction in actionscript?

  - by Michiel Standaert

  I have a problem with a game i am programming. I am making some sort of security game and i would like to have some visual line of sight. The problem is that i can't restrict my line of sight so my cops can't see through the walls. Below you find the design, in which they can look through windows, but not walls. Further below you find an illustration of what my problem is exactly. this is what it looks like now. As you can see, the cops can see through walls. This is the map i would want to use to restrict the line of sight. So the way i am programming the line of sight now is just by calculating some points and drawing the sight accordingly, as shown below. Note that i also check for a hittest using bitmapdata to check whether or not my player has been spotted by any of the cops. private function setSight(e:Event=null):Boolean { g = copCanvas.graphics; g.clear(); for each(var cop:Cop in copCanvas.getChildren()) { var _angle:Number = cop.angle; var _radians:Number = (_angle * Math.PI) / 180; var _radius:Number = 50; var _x1:Number = cop.x + (cop.width/2); var _y1:Number = cop.y + (cop.height/2); var _baseX:Number = _x1 + (Math.cos(_radians) * _radius); var _baseY:Number = _y1 - (Math.sin(_radians) * _radius); var _x2:Number = _baseX + (25 * Math.sin(_radians)); var _y2:Number = _baseY + (25 * Math.cos(_radians)); var _x3:Number = _baseX - (25 * Math.sin(_radians)); var _y3:Number = _baseY - (25 * Math.cos(_radians)); g.beginFill(0xff0000, 0.3); g.moveTo(_x1, _y1); g.lineTo(_x2, _y2); g.lineTo(_x3, _y3); g.endFill(); } var _cops:BitmapData = new BitmapData(width, height, true, 0); _cops.draw(copCanvas); var _bmpd:BitmapData = new BitmapData(10, 10, true, 0); _bmpd.draw(me); if(_cops.hitTest(new Point(0, 0), 10, _bmpd, new Point(me.x, me.y), 255)) { gameover.alpha = 1; setTimeout(function():void{ gameover.alpha = 0; }, 5000); stop(); return true; } return false; } So now my question is: Is there someone who knows how to restrict the view so that the cops can't look through the walls? Thanks a lot in advance. ps: i have already looked at this tutorial by emanuele feronato, but i can't use the code to restric the visual line of sight.

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• book and resource about vanilla OpenGL ES 2.0 development

  - by user827992

  I Found this book but it talks about an SDK created by the author rather than pure simple OpenGL ES 2.0; this sounds more like a commercial to me than a good book for programming, i would like to start with just OpenGL ES 2.0 without talking about anything else: can you give me a good advice on this? A good book or on-line resource. I'm also interested in cross platform development with OpenGL ES, in particular Android and iOS.

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• What is the origin of the name string? [closed]

  - by Andrej M.

  Possible Duplicate: Etymology of “String” Every programmer knows the meaning of the name string. In programming, it is traditionally a sequence of characters. But historically, who has decided that a sequence of characters will be called a string? Has there ever been an attempt to name a sequence of characters differently, but was ultimately abandoned due to the rising popularity of the name string?

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• How does a programmer who doesn't know how to program get a job ? [closed]

  - by A programmer

  I often read about this and I'm curious: if there programmers who can't program, how did they get a programming job in the first place? They must bring some value to the company they're working for, otherwise they would be fired. I don't think "programmers who don't know how to program" means "bad programmers" in this case ? Even if they are bad programmers, they still know (badly) how to write (bad) programs. So what defines programmers who can't program ?

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• SQL SERVER – Quiz and Video – Introduction to SQL Error Actions

  - by pinaldave

  This blog post is inspired from SQL Programming Joes 2 Pros: Programming and Development for Microsoft SQL Server 2008 – SQL Exam Prep Series 70-433 – Volume 4. [Amazon] | [Flipkart] | [Kindle] | [IndiaPlaza] This is follow up blog post of my earlier blog post on the same subject - SQL SERVER – Introduction to SQL Error Actions – A Primer. In the article we discussed various basics terminology of the error handling. The article further covers following important concepts of error handling. Introduction to SQL Error Actions Statement Termination Scope Abortion Batch Termination Above three are the most important concepts related to error handling and SQL Server.  There are many more things one has to learn but without beginners fundamentals one can’t learn the advanced concepts. Let us have small quiz and check how many of you get the fundamentals right. Quiz 1.) Which SQL Server error action happens for errors with a severity of 11-16 when you set the XACT_ABORT setting to ON? You will get Statement Termination. You will get Scope Abortion. You will get Batch Abortion. You will get Connection Termination. SQL Server will pick the error action. 2.) Which SQL Server error action happens for errors with a severity of 11-16 when you set the XACT_ABORT setting to OFF? You will get Statement Termination You will get Scope Abortion You will get Batch Abortion You will get Connection Termination SQL Server will pick the error action Now make sure that you write down all the answers on the piece of paper. Watch following video and read earlier article over here. If you want to change the answer you still have chance. Solution 1) 3 2) 5 Now compare let us check the answers and compare your answers to following answers. I am very confident you will get them correct. Available at USA: Amazon India: Flipkart | IndiaPlaza Volume: 1, 2, 3, 4, 5 Please leave your feedback in the comment area for the quiz and video. Did you know all the answers of the quiz? Reference: Pinal Dave (http://blog.sqlauthority.com) Filed under: Joes 2 Pros, PostADay, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, T SQL, Technology

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• Delegates in c#

  - by Jalpesh P. Vadgama

  I have used delegates in my programming since C# 2.0. But I have seen there are lots of confusion going on with delegates so I have decided to blog about it. In this blog I will explain about delegate basics and use of delegates in C#. What is delegate? We can say a delegate is a type safe function pointer which holds methods reference in object. As per MSDN it's a type that references to a method. So you can assign more than one methods to delegates with same parameter and same return type. Following is syntax for the delegate public delegate int Calculate(int a, int b); Here you can see the we have defined the delegate with two int parameter and integer parameter as return parameter. Now any method that matches this parameter can be assigned to above delegates. To understand the functionality of delegates let’s take a following simple example. using System; namespace Delegates { class Program { public delegate int CalculateNumber(int a, int b); static void Main(string[] args) { int a = 5; int b = 5; CalculateNumber addNumber = new CalculateNumber(AddNumber); Console.WriteLine(addNumber(5, 6)); Console.ReadLine(); } public static int AddNumber(int a, int b) { return a + b; } } } Here in the above code you can see that I have created a object of CalculateNumber delegate and I have assigned the AddNumber static method to it. Where you can see in ‘AddNumber’ static method will just return a sum of two numbers. After that I am calling method with the help of the delegates and printing out put to the console application. Now let’s run the application and following is the output as expected. That’s it. You can see the out put of delegates after adding a number. This delegates can be used in variety of scenarios. Like in web application we can use it to update one controls properties from another control’s action. Same you can also call a delegates whens some UI interaction done like button clicked. Hope you liked it. Stay tuned for more. In next post I am going to explain about multicast delegates. Till then happy programming.

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• Will my self-taught code be fine, or should I take it to the professional level?

  - by G1i1ch

  Lately I've been getting professional work, hanging out with other programmers, and making friends in the industry. The only thing is I'm 100% self-taught. It's caused my style to extremely deviate from the style of those that are properly trained. It's the techniques and organization of my code that's different. It's a mixture of several things I do. I tend to blend several programming paradigms together. Like Functional and OO. I lean to the Functional side more than OO, but I see the use of OO when something would make more sense as an abstract entity. Like a game object. Next I also go the simple route when doing something. When in contrast, it seems like sometimes the code I see from professional programmers is complicated for the sake of it! I use lots of closures. And lastly, I'm not the best commenter. I find it easier just to read through my code than reading the comment. And most cases I just end up reading the code even if there are comments. Plus I've been told that, because of how simply I write my code, it's very easy to read it. I hear professionally trained programmers go on and on about things like unit tests. Something I've never used before so I haven't even the faintest idea of what they are or how they work. Lots and lots of underscores "_", which aren't really my taste. Most of the techniques I use are straight from me, or a few books I've read. Don't know anything about MVC, I've heard a lot about it though with things like backbone.js. I think it's a way to organize an application. It just confuses me though because by now I've made my own organizational structures. It's a bit of a pain. I can't use template applications at all when learning something new like with Ubuntu's Quickly. I have trouble understanding code that I can tell is from someone trained. Complete OO programming really leaves a bad taste in my mouth, yet that seems to be what EVERYONE else is strictly using. It's left me not that confident in the look of my code, or wondering whether I'll cause sparks when joining a company or maybe contributing to open source projects. In fact I'm rather scared of the fact that people will eventually be checking out my code. Is this just something normal any programmer goes through or should I really look to change up my techniques?

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• Is it fine to put different category of stuff in a single domain name?

  - by Fahad Uddin

  I own a website which is regarding startups and finance. I am looking forward to work on Wordpress programming in which I would be selling wordpress themes. I thought of buying a domain name for Wordpress website but it takes quite lot of time to setup a website and then do its SEO. Is it fine(in terms of SEO and professionalism) to put the Wordpress category inside my old domain like, Domain: www.startupsandfinance.com Wordpress domain, www.wp.startupsandfinance.com

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