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• not able to boot through pendrive and run set up

  - by Ash

  I have dell inspiron, previously i have install ubuntu 11.10 on my win7 and make it dual boot. but since i want to upgrade my ubuntu version and change the partion spacing, i have delete 11.10 partion directly and extend my hardrive space(windows + ubuntu) at that moment everything is fine. then i have put 12.04 version pendrive in usb boot from usb and install the 12.04 32 bit . it was installed but can't showing dual boot option like 11.10 and my machine directly boot into win7 . so instantly i again delete my 12.04 partion . Now i am able to login into win7 but whenever i put pendrive(12.04) into usb drive i am facing error of "grub rescue" even though i try to put lower version(11.04) it showing another error "Error: No default or UI configuration directive found boot " i have reinstall win7 and reformat all partion still i am facing same error :( i need help badly.

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• How do I find the angle required to point to another object?

  - by Ginamin

  I am making an air combat game, where you can fly a ship in a 3D space. There is an opponent that flies around as well. When the opponent is not on screen, I want to display an arrow pointing in the direction the user should turn, as such: So, I took the camera location and the oppenent location and did this: double newDirection = atan2(activeCamera.location.y-ship_wrap.location.y, activeCamera.location.x-ship_wrap.location.x); After which, I get the position on the circumferance of a circle which surrounds my crosshairs, like such: trackingArrow.position = point((60*sin(angle)+240),60*cos(angle)+160); It all works fine, except it's the wrong angle! I assume my calculation for the new direction is incorrect. Can anyone help?

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• After some wired flash out, I can't login to wmii any more, how to fix it?

  - by Zen

  I've been using wmii on Ubuntu14.04(virtual machine on win7) for months. During which, I got pop out to login interface servaral times due to some wired mouse click action. But today, after I met such wired pop out, I can't login to wmii any more. I'll be stuck at the interface like The bottom yellow bar is the command area for wmii. but it has no response when I press Mod + p I restart my machine, and even reinstalled wmii, but everytime when I tried to login wmii, I stuck at that interface. By the way, I login to wmii from the login interface, where I can choose between Gnome and wmii. How to fix this? I'm crying for help! ps: I can login to gnome normally

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• NPOT texture and video memory usage

  - by Eonil

  I read in this QA that NPOT will take memory as much as next POT sized texture. It means it doesn't give any benefit than POT texture with proper management. (maybe even worse because NPOT should be slower!) Is this true? Does NPOT texture take and waste same memory like POT texture? I am considering NPOT texture for post-processing, so if it doesn't give memory space benefit, using of NPOT texture is meaningless to me. Maybe answer can be different for each platforms. I am targeting mobile devices. Such as iPhone or Androids. Does NPOT texture takes same amount of memory on mobile GPUs?

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• Sneak Peek: New ASP.NET Validation Summary Control

  Check out this image of our upcoming ASP.NET validation summary control, ASPxValidationSummary: ASPxValidationSummary Benefits This new control helps you summarize validation errors from multiple controls and then displays them in a single block. This allows you to organize screen space more effectively if validation is required for several editors. Error entries can be displayed as a table, bulleted or ordered list. And each entry can be presented as a link that moves focus to the corresponding...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• Root access issues - how do others manage this?

  - by Ciaran Archer

  Hi there I use my Ubuntu 10.04 LTS instance (via Virtual Box on Windows 7) with a non-root user. I am trying out developing Rails applications and I notice that I need to run some rails commands with sudo. The problem this gives me is some files are created by the root user then, and I cannot edit them via a GNOME window with my logged in user. What is the correct thing to do here? Should I somehow always login as root? If so how? Is there some way for me to give all files under my home directory (where I do all my Rails work) the correct permissions for all users, so I can edit them with my logged in user via a window? At the moment I have to resort to opening a file via the command line like this sudo gedit myFile.rb - this is not very sustainable! Thanks in advance!

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• Optimizing hierarchical transform

  - by Geotarget

  I'm transforming objects in 3D space by transforming each vector with the object's 4x4 transform matrix. In order to achieve hierarchical transform, I transform the child by its own matrix, and then the child by the parent matrix. This becomes costly because objects deeper in the display tree have to be transformed by all the parent objects. This is what's happening, in summary: Root -- transform its verts by Root matrix Parent -- transform its verts by Parent, Root matrix Child -- transform its verts by Child, Parent, Root matrix Is there a faster way to transform vertices to achieve hierarchical transform? What If I first concatenated each transform matrix with the parent matrices, and then transform verts by that final resulting matrix, would that work and wouldn't that be faster? Root -- transform its verts by Root matrix Parent -- concat Parent, Root matrices, transform its verts by Concated matrix Child -- concat Child, Parent, Root matrices, transform its verts by Concated matrix

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• Storing documents in DMS

  - by Shaza

  I need your opinions and suggestions about storing documents in a DMS system. I think the DMS should save its own copies of the documents, not their original path on the disk. So, the DMS should have its own space to write on. But what about the way they're stored? Do they have their own extension different from the original one? What about the algorithm that stores them? What about the algorithm that retrieves them? What do you suggest??

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• Unable to start GRUB2 on Triple boot Macbook Pro with OS X Lion, Windows 7 and Ubuntu

  - by Shravan

  I installed Windows 7 using Bootcamp. Then I created a partition from the empty space in the Windows partition and another 4GB partition for the linux swap using GParted. I installed Ubuntu 12.04 LTS in the the newly created partition from the Windows partition. Now GRUB2 does not load and I can only see the blinking cursor on the top right when selecting "Windows HD" from the 'option' key at the start up. OS X works fine but nothing else. Could someone please help me fix this? I am attaching the boot-info from the boot-repair tool. http://paste.ubuntu.com/1040169/

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• How to shade a texture two different colors?

  - by Venesectrix

  To give an example of what I'm asking about, I'll use Saints Row 3 since I've been playing that lately. In that game you can customize your looks and your car's appearance a lot. Your coat can have a primary color and a trim color. Your car can have a primary color and a stripe color, etc. Is there just a single coat texture that is being shaded two different colors somehow or are they overlaying a transparent second texture for the trim/stripes that gets shaded differently? If it's just one texture I'd like to know how it's done. If it's two different textures it seems like it's a waste of space. The second texture would be the same size as the first one but mostly transparent if you just wanted to lay it on top of the first one. Or are they just carefully positioning a second, smaller texture so that it aligns properly with the first one?

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• SQL Saturday #294 - Philadelphia

  SQL Saturday is coming to Philadelphia on June 7, 2014. This event is a free day of training and networking for SQL Server Professionals, organized by the Philadelphia SQL Server User Group. The event also features two paid-for Precons, one presented by Allan Hirt and the other presented jointly by Joseph D'Antoni and Stacia Misner. Register while space is available. FREE eBook – "45 Database Performance Tips for Developers"Improve your database performance with 45 tips from SQL Server MVPs and industry experts. Get the eBook here.

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• How To Run Chrome OS From a USB Drive and Use It On Any Computer

  - by Chris Hoffman

  Google only supports running Chrome OS on Chromebooks, but don’t let that stop you. You can put Chrome OS on a USB drive and boot it on any computer, just as you’d run a Linux distribution from a USB drive. If you just want to test Chrome OS, your best bet is running it in a virtual machine. This ensures that you won’t run into any hardware-related issues. Your computer may not be able to run Chrome OS properly. Note: You’ll need a USB drive with at least 4 GB of space for this. 6 Ways Windows 8 Is More Secure Than Windows 7 HTG Explains: Why It’s Good That Your Computer’s RAM Is Full 10 Awesome Improvements For Desktop Users in Windows 8

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• SSRS 2008 R2 KPIs with bullet graphs

  Key Performance Indicators are typically displayed in a scorecard with stop light indicators, which are either red, amber or green light icons. The limitation for these kind of indicators is that you can see the actual and target values in two different fields as well as see the status of the KPI in red, amber or green color. If the user wants to figure out the thresholds associated with the KPI, these values are generally not visible. Further, representing the threshold values in the scorecard itself defeats the purpose of the scorecard. The scorecard should display the KPI's status in the most summarized form and use a minimal amount of space on the dashboard. In this tip we would look at how to address this issue.

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• Developing a computer system based on Nand2Tetris [on hold]

  - by Ryan

  I recently finished a book called Nand2Tetris (nand2tetris.org) where I built my own computer system from scratch with its own machine language, assembly code, and a high level language called Jack that's translated to Hack binary. However, I feel like the "computer" I built throughout the course of this book (called the Hack computer) is a bit too simple for various reasons: 1) There are only two registers (D and A), whereas most computers have much more 2) Peripheral devices like mouse and keyboard have to be directly implemented 3) Peripheral devices use a pre-planned shared memory map to communicate with the CPU instead of using interrupts (which aren't covered at all) 4) Jack (the high level language) code doesn't compile to Assembly code directly, instead it compiles to an intermediate language, which in turn gets translated to Assembly. 5) There is no ROM or permanent storage device, everything is stored in RAM 6) No support for colored monitor, networking or sound I would like to build a more complicated computer system now based on what I've learned from Nand2Tetris. Does anyone know of any good resources or books to get started on this? (BTW by computer system I mean software that can emulate the hardware of a virtual computer with its own unique instruction set)

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• Juju LXC configuration

  - by Preethi

  I've looked at this post (http://askubuntu.com/questions/65359/how-do-i-configure-juju-for-local-usage) for setting up juju on a local environment with lxc. However, is there a way to use juju with lxc in a non-local environment? I am looking at a scenario where lxc containers are deployed on multiple nodes. I.e., lets say I have virtual machines m1 and m2 with wordpress deployed on a container in m1 and mysql deployed on a container in m2. Is there a way to orchestrate these deployments with juju?

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• Do subdomains need to be defined through domain registrar?

  - by Johnny

  I have bought a new domain name from GoDaddy. Let's say it is abcd.com. On GoDaddy's DNS Managing page, I changed A(Host) part to @ = 74.125.232.215 which is www.google.co.uk's IP address. Now if I type www.abcd.com, it directly goes to www.google.co.uk. But if I type http://test.abcd.com, it cannot be loaded. Do I need to define every subdomain through GoDaddy? Is this how it works? P.S. Amazon EC2 directly generates a subdomain for users to reach their virtual PCs. It cannot be domain registrar dependant. P.S.2. Same question for using "www2" at the start of url.

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• Service Account Management in SharePoint 2013

  - by Sahil Malik

  SharePoint, WCF and Azure Trainings: more information My newest article detailing Service Account management in SharePoint 2013 is now online. Who thought such a simple need could have so many nuances. Hope you like it With this, I am going to do a break – not taking time off, but switching gears. My next series of Articles are going to focus on writing Mobile Apps for SharePoint and Office 365. And I intend to cover every single scenario, On Prem, Cloud, Xamarin, HTML5, Cordova, and Native. I will show Windows and iOS, I’m an android dumbass, but space/time permitting I may show cordova android – anyway, for an Android guru the articles will provide enough information get rolling anyway. Read full article ....

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• What ports should I open for listen and/or transmit in my firewall to keep internet ok?

  - by H_7

  What are the minimum ports and services that should I allow/open for listen and/or transmit in my firewall (I am using Firestarter) to keep my internet running ok? Some talk about what services, which port uses, and why it matters should be nice too. Thanks for any advice. I have some bet to the answer 80 http 443 https 53 dns EDIT: I will just browse some sites. I have a windows virtual machine, so I ll use it too, bu t just normal navigation too. No torrents, IRC's, FLASH, etc.. Thanks for attention. hmmm... lost! Linux Mint 9 here.

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• mounting linux partition after installing windows

  - by varsketiz

  I installed windows 7 and my grub is gone. I'm trying to follow: https://help.ubuntu.com/community/RecoveringUbuntuAfterInstallingWindows but I can't mount my ubuntu partion. sudo fdisk -l Device Boot Start End Blocks Id System /dev/sda1 * 1 13 102400 7 HPFS/NTFS Partition 1 does not end on cylinder boundary. /dev/sda2 13 4863 38958080 7 HPFS/NTFS /dev/sda3 4864 14594 78157825 5 Extended /dev/sda5 14220 14594 2999296 82 Linux swap / Solaris Gparted shows my Extended partition as empty/unallocated space (???). How can I mount it? sudo mount -t ext3 /dev/sda3 /media/ubuntu mount: wrong fs type, bad option, bad superblock on /dev/sda3, missing codepage or helper program, or other error In some cases useful info is found in syslog - try dmesg | tail or so

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• SVN Checkout folder as local webroot

  - by Shredder

  I have XAMPP installed and running. I have an SVN working directory (WD) on my local that checks out from the repository. I set up a virtual host in xampp to point to my WD, but my browser (FF) gives me a 500 http status error: Either the server is overloaded or there was an error in a CGI script. When I place a regular folder in the same location with the WD and switch names, it works fine.. Can I not use an SVN working directory as a web root folder?

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• make a custom apache handler (for multiple php versions)

  - by user10580

  ive succesfully installed php 5.2 and it runs as CGI. ultimatly i want to put something like AddHandler application/x-httpd-php52 in the htaccess file of the dir i want to run it on. however, this only really works in the virtual hosts because i cant wrap my head around how to deifne a custom handler. <FilesMatch "\.php"> SetHandler application/x-httpd-php5 </FilesMatch> ScriptAlias /php52-cgi /usr/lib/cgi-bin/php52-cgi Action application/x-httpd-php5 /php52-cgi AddHandler application/x-httpd-php5 .php How can i do somthing like AddHandler application/x-httpd-php52 in the htaccess?

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• Optimization of a Hybrid Pagination Scheme

  - by Kaustubh Karkare

  I'm working on a Web Application using node.js in which I'm building a partial copy of the database on the client-side to decrease the load on my server. Right now, I have a function like this (expressed as python-style pseudocode, but implemented in JavaScript): get(table_name,primary_key): if primary_key in cache[table_name]: return cache[table_name][primary_key] else: x = get_data_from_server(table_name,primary_key) # socket.io return cache[table_name][primary_key] = x While this scheme works perfectly well for caching individual rows, I'd like to extend it to support the creation of paginated tables ordered according to the primary_key, and loading additional data using the above function for only the current and possibly the adjacent pages. Now, I don't want to keep the list of primary keys on the server to be retrieved every time I need to change the page (which, for reasons beyond the scope here, will be very frequent), and keeping it on the client side, subject to real-time create/delete events from the server, doesn't seem that good an idea, even after compression (using ranges, instead of individual values). What is the best way to calculate which items are to be displayed on a random page, minimizing the space requirements & the need for communication with the server?

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• Calculating the rotational force of a 2D sprite

  - by Jon

  I am wondering if someone has an elegant way of calculating the following scenario. I have an object of (n) number of squares, random shapes, but we will pretend they are all rectangles. We are dealing with no gravity, so consider the object in space, from a top down perspective. I am applying a force to the object at a specific square (as illustrated below). How do I calculate the rotational angle, based on the force being applied, at the location being applied. If applied in the center square, it would go straight. How should it behave the further I move from the center? How do I calculate the rotational velocity?

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• Can I expand my /boot without upsetting the system?

  - by Kaustubh P

  This is the current state of my partition table. As can be seen, the boot is very small, and I cant upgrade the kernel, because the update-manager tells me there isnt enough space on /boot :( Which effectively means that I cant update my kernel. Can I change the size of my boot, without necessitating a reinstall of either of the installed system? Filesystem Size Used Avail Use% Mounted on /dev/sda5 12G 4.9G 6.2G 45% / none 2.0G 284K 2.0G 1% /dev none 2.0G 8.5M 2.0G 1% /dev/shm none 2.0G 92K 2.0G 1% /var/run none 2.0G 0 2.0G 0% /var/lock /dev/sda3 42G 21G 22G 49% /media/Erste /dev/sda2 5.1G 2.5G 2.7G 48% /media/Swap /dev/sda1 30G 25G 4.9G 84% /media/Windows7 /dev/sda9 47G 28G 20G 60% /media/Zweite /dev/sda6 11G 7.6G 2.0G 80% /home /dev/sda8 49M 31M 16M 66% /boot

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• Restoring Virtualbox machine images from old hard drive

  - by memilanuk

  I recently replaced the HDD in my laptop, and re-installed Windows & Ubuntu. Now I want to restore the various virtual machines I had set up on the old HDD, which is mounted in an external USB enclosure. I can read the HDD okay, and the 'bad' spots seemed to be in the Windows partition... but whenever I try to restore the VDI files the copy errors out. I've tried drag-n-drop in Nautilus, I've tried grsync, etc. Always bombs out on the VDI files. I've copied over multi-GB dvd iso images with no problem, but the VDI files always fail the checksums. Any ideas? TIA, Monte

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