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• Bash: Handling Command Not Found

  <b>Linux Journal:</b> "After a recent O/S version upgrade (to openSUSE 11.2) I noticed that bash started being a bit more intelligent when I did something stupid: it started giving me a useful error message..."

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• installing xbuntu desktop in ubuntu 12.04

  - by Vijay Nalawade

  I have installed ubuntu 12.04. I want to install xfce desktop.when i able to install xubuntu desktop getting following message. sudo apt-get install lubuntu-desktop Media change: please insert the disc labeled 'Ubuntu 12.04.1 LTS Precise Pangolin - Release i386 (20120817.3)' in the drive '/cdrom/' and press enter i didn't know why this error are coming and also i don't have CD driver. i installed Ubuntu using usb. please let me know how to install xubuntu desktop.

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• Who could ask for more with LESS CSS? (Part 2 of 3&ndash;Setup)

  - by ToStringTheory

  Welcome to part two in my series covering the LESS CSS language.  In the first post, I covered the two major CSS precompiled languages - LESS and SASS to a small extent, iterating over some of the features that you could expect to find in them.  In this post, I will go a little further in depth into the setup and execution of using the LESS framework. Introduction It really doesn’t take too much to get LESS working in your project.  The basic workflow will be including the necessary translator in your project, defining bundles for the LESS files, add the necessary code to your layouts.cshtml file, and finally add in all your necessary styles to the LESS files!  Lets get started… New Project Just like all great experiments in Visual Studio, start up a File > New Project, and create a new MVC 4 Web Application.  The Base Package After you have the new project spun up, use the Nuget Package Manager to install the Bundle Transformer: LESS package. This will take care of installing the main translator that we will be using for LESS code (dotless which is another Nuget package), as well as the core framework for the Bundle Transformer library.  The installation will come up with some instructions in a readme file on how to modify your web.config to handle all your *.less requests through the Bundle Transformer, which passes the translating onto dotless. Where To Put These LESS Files?! This step isn’t really a requirement, however I find that I don’t like how ASP.Net MVC just has a content directory where they store CSS, content images, css images….  In my project, I went ahead and created a new directory just for styles – LESS files, CSS files, and images that are only referenced in LESS or CSS.  Ignore the MVC directory as this was my testbed for another project I was working on at the same time.  As you can see here, I have: A top level directory for images which contains only images used in a page A top level directory for scripts A top level directory for Styles A few directories for plugins I am using (Colrizr, JQueryUI, Farbtastic) Multiple *.less files for different functions (I’ll go over these in a minute) I find that this layout offers the best separation of content types.  Bring Out Your Bundles! The next thing that we need to do is add in the necessary code for the bundling of these LESS files.  Go ahead and open your BundleConfig.cs file, usually located in the /App_Start/ folder of the project.  As you will see in a minute, instead of using the method Microsoft does in the base MVC 4 project, I change things up a bit.  Define Constants The first thing I do is define constants for each of the virtual paths that will be used in the bundler: The main reason is that I hate magic strings in my program, so the fact that you first defined a virtual path in the BundleConfig file, and then used that path in the _Layout.cshtml file really irked me. Add Bundles to the BundleCollection Next, I am going to define the bundles for my styles in my AddStyleBundles method: That is all it takes to get all of my styles in play with LESS.  The CssTransformer and NullOrderer types come from the Bundle Transformer we grabbed earlier.  If we didn’t use that package, we would have to write our own function (not too hard, but why do it if it’s been done). I use the site.less file as my main hub for LESS - I will cover that more in the next section. Add Bundles To Layout.cshtml File With the constants in the BundleConfig file, instead of having to use the same magic string I defined for the bundle virtual path, I am able to do this: Notice here that besides the RenderSection magic strings (something I am working on in another side project), all of the bundles are now based on const strings.  If I need to change the virtual path, I only have to do it in one place.  Nifty! Get Started! We are now ready to roll!  As I said in the previous section, I use the site.less file as a central hub for my styles: As seen here, I have a reset.css file which is a simple CSS reset.  Next, I have created a file for managing all my color variables – colors.less: Here, you can see some of the standards I started to use, in this case for color variables.  I define all color variables with the @col prefix.  Currently, I am going for verbose variable names. The next file imported is my font.less file that defines the typeface information for the site: Simple enough.  A couple of imports for fonts from Google, and then declaring variables for use throughout LESS.  I also set up the heading sizes, margins, etc..  You can also see my current standardization for font declaration strings – @font. Next, I pull in a mixins.less file that I grabbed from the Twitter Bootstrap library that gives some useful parameterized mixins for use such as border-radius, gradient, box-shadow, etc… The common.less file is a file that just contains items that I will be defining that can be used across all my LESS files.  Kind of like my own mixins or font-helpers: Finally I have my layout.less file that contains all of my definitions for general site layout – width, main/sidebar widths, footer layout, etc: That’s it!  For the rest of my one off definitions/corrections, I am currently putting them into the site.less file beneath my original imports Note Probably my favorite side effect of using the LESS handler/translator while bundling is that it also does a CSS checkup when rendering…  See, when your web.config is set to debug, bundling will output the url to the direct less file, not the bundle, and the http handler intercepts the call, compiles the less, and returns the result.  If there is an error in your LESS code, the CSS file can be returned empty, or may have the error output as a comment on the first couple lines. If you have the web.config set to not debug, then if there is an error in your code, you will end up with the usual ASP.Net exception page (unless you catch the exception of course), with information regarding the failure of the conversion, such as brace mismatch, undefined variable, etc…  I find it nifty. Conclusion This is really just the beginning.  LESS is very powerful and exciting!  My next post will show an actual working example of why LESS is so powerful with its functions and variables…  At least I hope it will!  As for now, if you have any questions, comments, or suggestions on my current practice, I would love to hear them!  Feel free to drop a comment or shoot me an email using the contact page.  In the mean time, I plan on posting the final post in this series tomorrow or the day after, with my side project, as well as a whole base ASP.Net MVC4 templated project with LESS added in it so that you can check out the layout I have in this post.  Until next time…

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• ACPI=OFF in Ubuntu 11.10

  - by Mark

  When I tried to upgrade from 11.04 to 11.10 the system froze, so I've been playing around with a couple other linux builds (Fedora, Mint, and Puppy) the last couple days and I keep coming around to the same problem: a lockup during boot; each build referencing a kernel error. On another board someone suggested booting with a boot up line of "ACPI = off". It works with other OS', but I'm not sure where to put this command. Can anyone 'enlighten' me, please?

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• problem with booting ubuntu 12.04 lts after instaling it alonside windows 8.1

  - by Alexandar

  i installed ubuntu alongside windows 8.1 over an usb drive on my lap top. At first i had problems with boot selection menu and i fixed it with EasyBCD now i have another problem i boot up my lap top and then it takes me to chose windows 8.1 or ubuntu i press ubuntu and it takes me to grub menu now i chose there ubuntu 12.04 and it starts to boot for few secs then my screen goes black and nothing happens few secs later i hear like short error noise and still nothin happens. Can someone help me solve this problem?

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• html5 video source code [closed]

  - by Jeeva Nandhan

  !DOCTYPE html This is my vid.html file and my video1.js file is given below the .java file is public class MyWebAppActivity extends Activity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); WebView myWeb=(WebView) findViewById(R.id.webView1); myWeb.getSettings().setJavaScriptEnabled(true); myWeb.setWebChromeClient(new WebChromeClient()); myWeb.loadUrl("file:///android_assets/www/vid.html");}} Am receiving an error in emulator that Web page not available in the file:///android_assets/www/vid.html

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• Second Monitor Unable to Display at any Resolution

  - by Ryan Sharp

  After connecting the second monitor, the only way to get it to work is with 'mirror', which isn't what I want it for. If I select a display resolution for it, I get the following error: requested position/size for CRTC 148 is outside the allowed limit: position=(1908, 0), size=(1024, 768), maximum=(1920, 1920) I'm on 12.04, with AMD HD Radeon 6950, Post-update drivers. I appreciate anybodies help with this. Thanks.

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• Validation of viewstate MAC failed - MVC

  - by Nettuce

  This gave me a WTF moment recently. MVC? Viewstate? Eh!? All was fine on the dev server, but as soon as I deployed to the web farm this error appeared every time I recycled the app pool. It turns out it was the cookie created by <%= Html.AntiForgeryToken() %> and simply generating a machine key sorted it out. http://aspnetresources.com/tools/keycreator.aspx

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• "Download failed, tap to resume"

  - by user96142

  I have shared folders on my Laptop System76 Pangolin Performance and installed Ubuntu One on my Motorola Droid RAZR. The folders show up on my Droid, however when I try to view them by tapping on them I get the following error, "Download failed, tap to resume". I have Googled for solutions and I have uninstalled and reinstalled the app on my t still have the problem. Does anyone have any suggestions?

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• Paypal "Subscribe" button: Is it possible to let the subscriber set the amount?

  - by Šime Vidas

  I'm setting up a recurring payment option on my website. I'd like to have two options: Option 1 (for individuals): Fixed $6/mo subscription Option 2 (for organizations): A subscription where the amount is set by the subscriber PayPal's "Subscribe" button does not seem to allow that: When I leave the "Amount" field of the 2nd option empty, I get an error: So, is this not possible? Do all options require fixed amounts?

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• The package is of bad quality - google chrome

  - by hafichuk

  I'm doing a fresh install of 12.10 and am trying to install Google Chrome. I've downloaded the deb from http://chrome.google.com and am installing it through the Ubuntu Software Centre. I'm getting a message: The package is of bad quality (same as What is a "bad quality" package?) In the expanded section, the "error" states: E: google-chrome-stable: file-in-etc-not-marked-as-conffile etc/cron.daily/google-chrome Is it safe to click on the "Ignore and Install" button?

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• How to setup debian/control to force updating a library?

  - by LovinBuntu

  This question is aimed at PPA/packages maintainers. I have a PPA with 2 packages: mypackage (currently version 1~ppa1~quantal) mypackagelib (currently version 1~ppa1~quantal) Currently, the control file of mypackage has: Depends: mypackagelib I want to update the 2 packages to version '2' (mypackage version 2 and mypackagelib version 2). How can I make sure that the 2 packages will be updated when the user updates 'mypackage' ? FYI, changing the 'Depends' field to: Depends: mypackagelib (>= 2) does NOT work, and returns the following error: mypackage : Depends: mypackagelib (>= 2) but mypackagelib-2~ppa1~quantal is to be installed

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• 10 Effective and Free of Charge SEO Tips

  Building a website doesn't end up in polished web design and error-free programming codes. You have to be aware of the search engine optimization tips you should consider right after your purchasing of domain name. So here are the 10 free yet efficient SEO tips.

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• Does Geany or Gedit provide a browser protocol in the way Textmate does with txmt://?

  - by Rich

  Textmate on the Mac can be bound to the txmt protocol, meaning that development frameworks (such as the Play Framework) can be configured to use this to display error messages. If a stacktrace appears, each line of the stacktrace is a URL of the format (I'm guessing): txmt:///home/myuser/projects/myproject/ProblemFile.java:123 (where 123 is the line number). Clicking this opens the file in Textmate. Is this possible with Gedit, Geany or another programmer's text editor?

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• SQL SERVER Disabled Index and UpdateStatistics

  When we try to update the statistics, it throws an error as if the clustered index is disabled. Now let us enable the clustered index only and attempt to update the statistics of the table right after that. Have you ever come across the situation where a conversation never gets over and it continues even [...]...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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• Where has /lib/udev/keymap gone? How do I adjust keymaps in Trusty?

  - by dizpers

  I tried to use this tutorial to make scroll switch work on my Microsoft Natural Ergonomic Keyboard 4000. But I face following error: sudo: /lib/udev/keymap: command not found I have udev version 204-5ubuntu20.2 (the version found in Trusty) I noticed that this version doesn't include keymap tool. But I notices that greater udev versions (which available for Debian, for example) include this tool. Could somebody explain this diff for me? =) And what should I do in this case - install package from Debian repo?

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• emachines e725 resulution problem

  - by Montasir

  I am new in Ubuntu I cannot set my resolution to 1366x768 all options in graphical displays is 1024x768 only. I tried cvt 1366 768 and xrandr --newmode "1368x768_60.00" 85.86 1368 1440 1584 1800 768 769 772 795 -HSync +Vsync and got xrandr: Failed to get size of gamma for output default X Error of failed request: BadName (named color or font does not exist) Major opcode of failed request: 149 (RANDR) Minor opcode of failed request: 16 (RRCreateMode) Serial number of failed request: 19 Current serial number in output stream: 19 What can I do.

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• IndexOutOfRangeException on World.Step after enabling/disabling a Farseer physics body?

  - by WilHall

  Earlier, I posted a question asking how to swap fixtures on the fly in a 2D side-scroller using Farseer Physics Engine. The ultimate goal being that the player's physical body changes when the player is in different states (I.e. standing, walking, jumping, etc). After reading this answer, I changed my approach to the following: Create a physical body for each state when the player is loaded Save those bodies and their corresponding states in parallel lists Swap those physical bodies out when the player state changes (which causes an exception, see below) The following is my function to change states and swap physical bodies: new protected void SetState(object nState) { //If mBody == null, the player is being loaded for the first time if (mBody == null) { mBody = mBodies[mStates.IndexOf(nState)]; mBody.Enabled = true; } else { //Get the body for the given state Body nBody = mBodies[mStates.IndexOf(nState)]; //Enable the new body nBody.Enabled = true; //Disable the current body mBody.Enabled = false; //Copy the current body's attributes to the new one nBody.SetTransform(mBody.Position, mBody.Rotation); nBody.LinearVelocity = mBody.LinearVelocity; nBody.AngularVelocity = mBody.AngularVelocity; mBody = nBody; } base.SetState(nState); } Using the above method causes an IndexOutOfRangeException when calling World.Step: mWorld.Step(Math.Min((float)nGameTime.ElapsedGameTime.TotalSeconds, (1f / 30f))); I found that the problem is related to changing the .Enabled setting on a body. I tried the above function without setting .Enabled, and there was no error thrown. Turning on the debug views, I saw that the bodies were updating positions/rotations/etc properly when the state was changes, but since they were all enabled, they were just colliding wildly with each other. Does Enabling/Disabling a body remove it from the world's body list, which then causes the error because the list is shorter than expected? Update: For such a straightforward issue, I feel this question has not received enough attention. Has anyone else experienced this? Would anyone try a quick test case? I know this issue can be sidestepped - I.e. by not disabling a body during the simulation - but it seems strange that this issue would exist in the first place, especially when I see no mention of it in the documentation for farseer or box2d. I can't find any cases of the issue online where things are more or less kosher, like in my case. Any leads on this would be helpful.

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• Why Use GRUB2? Good Question! (part 3)

  <b>Linux Planet:</b> "As we come to the end of Akkana Peck's excellent series on mastering GRUB2, it's not clear what advantages it has over legacy GRUB, or even good old LILO. It seems it's gone backwards. In today's installment we learn how to translate some common and mysterious error messages, and how to manage a multi-boot system with GRUB2."

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• Replicating A Volume Of Large Data via Transactional Replication

  During weekend maintenance, members of the support team executed an UPDATE statement against the database on the OLTP Server. This database was a part of Transactional Replication, and once the UPDATE statement was executed the Replication procedure came to a halt with an error message. Satnam Singh decided to work on this case and try to find an efficient solution to rebuild the procedure without significant downtime.

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• EntityRepository not found [migrated]

  - by PachinSV

  I'm new in Doctrine, I'm following the examples in the documentation. I created my entities and everything is working fine until I created a Repository. I have an entity called User and a UserRepository. But when I try to use the User repository I get the error message: Fatal error: Class 'Doctrine\ORM\EntityRepository' not found in C:\xampp\htdocs\excap\repositories\UserRepository.php on line 10 use Doctrine\ORM\EntityRepository; /** * Description of UserRepository * * @author Mario */ class UserRepository extends EntityRepository { How can I solved this? <?php //bootstrap_doctrine.php $isDevMode = true; use Doctrine\ORM\Tools\Setup; require_once 'vendor/autoload.php'; $config = Setup::createAnnotationMetadataConfiguration(array(__DIR__.'/entities'), $isDevMode); $conn = array( 'driver' => 'pdo_mysql', 'user' => 'mydbuser', 'password' => 'mydbpassword', 'dbname' => 'mydbname' ); $entityManager = \Doctrine\ORM\EntityManager::create($conn, $config); ?> <?php //boostrap.php //Entities require_once 'entities/User.php'; require_once 'entities/Gender.php'; require_once 'entities/AccessPoint.php'; //Repositories require_once 'repositories/UserRepository.php'; if(!class_exists("Doctrine\Common\Version", FALSE)) { require_once 'bootstrap_doctrine.php'; } ?> <?php // autoload.php generated by Composer if (!class_exists('Composer\\Autoload\\ClassLoader', false)) { require __DIR__ . '/composer' . '/ClassLoader.php'; } return call_user_func(function() { $loader = new \Composer\Autoload\ClassLoader(); $composerDir = __DIR__ . '/composer'; $map = require $composerDir . '/autoload_namespaces.php'; foreach ($map as $namespace => $path) { $loader->add($namespace, $path); } $classMap = require $composerDir . '/autoload_classmap.php'; if ($classMap) { $loader->addClassMap($classMap); } $loader->register(); return $loader; }); ?>

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• dual boot ubuntu installation mishap

  - by user590849

  I have Windows 7 pc ,where i had 2 partitions, a c drive for my system files and a d drive for my data. I decided to install ubuntu 11.10 a couple of days ago and thought of install it in a separate partition of its own. So i made a separate Linux partition of 30GB. I downloaded ubuntu on my usb stick and installed. During the installation process i was asked where to install ubuntu so i opened up a screen that was similar to this one There were six partitions present ( I had made only 3 partition via windows). Their names were totally different from the ones that i had given in windows. So i selected a drive which had the same size as my Linux partition that i had made in windows ( no other partition had the same size). I clicked on install now and got an error message saying that "There was no root folder set". I set the newly made partition as my root folder and clicked install now. Now out of the 6 partitions that were created 3 were logical ( i had only created 3 partitions in windows). As soon as i clicked install now, the system asked me where i wanted to put my "swap space". I selected one of the logical drives and hit install. Ubuntu successfully installed on my system and at the end it asked me to reboot. I did and got the following error message: "missing operating system". I was shocked. I tried my windows recovery disk ( that i had gotten when i had purchased my laptop) and there i went into startup repair. In the startup repair option i was not able to locate windows. The system asked me to click the "Load drivers" button to load the drivers to my harddrive where windows was installed, but i could not locate any drivers to my harddrive. I tried this several times but to no success. I panicked and installed ubuntu, now this time click "ok" at every step( not worrying about the partition and all). The os installed correctly and i am now able to access my harddrive. NO data within the c drive is lost. All the windows system files are intact. I wish to recover my windows installation. How do i go about it? Thank you in advance. I do not want to format my computer and install windows again.

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• problem after suspend ubuntu 12.04

  - by alex

  I'd like to have a thing cleared. I just started using Ubuntu and installed 12.04 the only problem is that when i turn my laptop back on after suspension i get a black screen with this written: legacy_resume():pnp_bus_resume+0x0/0x70 return -19 PM: Device 00:09 failed to resume: error -19 i8042: Can't reactivate AUX port and after this message at times my touchpad doesn't work as well. I am currently using a vpc eh2n1e thanks for the support

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• Problem with Software Center

  - by user215391

  I am not able use my Ubuntu Software Center and Synaptic package manager. I can't understand what's the problem. When I use the command: sudo apt-get update it shows this error: E: Malformed line 1 in source list /etc/apt/sources.list.d/canonical_partner.list (dist parse) E: The list of sources could not be read. I have seen How do I remove a malformed line from my sources.list?, but it didn't help.

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• ubuntu 12.04 with windows 8 dual boot not booting

  - by Nick

  I followed the procedure mentioned at Installing Ubuntu on a Pre-Installed Windows 8 (64-bit) System (UEFI Supported) on toshiba satellite laptop. also tried the boot-repair and logs @ http://paste.ubuntu.com/6327398/ Its not booting to windows as well as ubuntu. It goes to grub command prompt. When on initial screen it briefly shows error message as failed to open /efi/Microsoft/boot/grubx64. Please advise. EDIT : Secure boot in on and boot mode is UEFI Boot

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