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• How do I copy packages within a PPA from one release to another? (nonsensical "same version already has published binaries" error)

  - by Scott Ritchie

  I keep getting weird errors from launchpad when I try and copy the Maverick packages to Natty for the PPA. I select the wine1.3 package (not in Ubuntu), select "copy to this PPA", and then select "rebuild the resulting binaries". This error emerges: The following source cannot be copied: wine1.3 1.3.11-0ubuntu1 in maverick (same version already has published binaries in the destination archive) I have no idea what this error means but apparently it doesn't mean there are binaries in the destination archive.

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• broadcom BCM4318 firmware missing

  - by Lucas

  I tried sudo apt-get update && apt-cache search b43 sudo apt-get install firmware-b43-installer after that i get this error Can't update, Some index files failed to download i tried cd /var/lib/apt/lists/partial sudo rm gb.archive.ubuntu.com_ubuntu_dists_natty_multivers e_source_Sources OR sudo rm /var/lib/apt/lists/partial/gb.archive.ubuntu.com_ubuntu_dists_natty_multivers e_source_Sources another error cannot remove e_source_Sources

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• how to set environment variable in eric IDE

  - by ng0323

  I have no problem running a python script from the terminal, but in eric IDE, I am getting this error: ImportError libcudart.so.6.0: cannot open shared object file: No such file or directory Perhaps it's an enviroment variable that needs to be set. In eric, when I run script, I filled in the environment option as follows. I tried set PATH = usr/local/cuda-6.0/bin or PATH = /usr/local/cuda-6.0/bin or just /usr/local/cuda-6.0/bin and they all didn't work.

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• No Alias's when sudo'ing

  - by Danny Roberts

  I was playing around with aliases today and I noticed that aliases don't seem to be available whilst using sudo: danny@kaon:~$ alias alias egrep='egrep --color=auto' alias fgrep='fgrep --color=auto' alias grep='grep --color=auto' alias l='ls -CF' alias la='ls -A' alias ll='ls -alF' alias ls='ls --color=auto' danny@kaon:~$ ll -d / drwxr-xr-x 23 root root 4096 2011-01-06 20:29 // danny@kaon:~$ sudo -i root@kaon:~# ll -d / drwxr-xr-x 23 root root 4096 2011-01-06 20:29 // root@kaon:~# exit logout danny@kaon:~$ sudo ll -d / sudo: ll: command not found Is there any reason why you cannot use aliases whilst using sudo?

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• Is hiring a "chief intern" a good idea?

  - by dukeofgaming

  I'm starting an internship program for our software department and I was wondering about creating a position ("chief intern", intern supervisor, or whatever one should call it) with the following responsibilities: Train interns Coach interns Manage projects and tasks for interns Supervise intern's work in terms of rhythm and quality Act as a liaison between the main team's needs and interns performance/aspirations Evaluate and facilitate intern's progress when they want to grab a higher-level domain-specific task (at this point, a main dev team member can do mentoring) Get freely involved in the main team's software development tasks so that he himself can grow, and have full mentorship from the main dev team. I'm thinking that an apprentice-level engineer (below Jr., or Jr.; but being a graduate and working full-time) can handle this for a while (he will be trained by the main dev team first), until one of two things happen: He/she decides to move on to the main dev team by recommending an appropriate replacement (or me finding another one as a new hire) Keep leading the interns while still being able to grow to Jr. Eng., Eng., Sr. Eng I know the notion of a "chief intern" is common within the medical world, but I don't really know about that in the software world (I was a freelancer for most of my university years). A side-intention to this is also that, if this ends up being a higher rotation position (organically) because the intern supervisor wants to join the main dev team, this could help interns that aspire this position emerge as leaders. My main intention for this, though, is removing distractions from the main team but without making the interns suffer the lack of attention, which could lead to boredom and little intern retention. Is this "chief intern" idea common (or good at least)?, are there any obvious risks to it that I might not be seeing? Edit: I have a draft plan for the kind of work the interns would be doing: Are R&D mini-projects a good activity for interns? Edit #2: My intention is not keeping them isolated, but having someone focus on giving attention to them when we cannot. Edit #3: I'm now convince it is a good idea, but I will take the organic approach to hiring someone in such position: do it myself until I cannot. This way I'll know better what to expect from a person I hire for this role in the future, as well as what works and what doesn't with interns.

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• Apply LADSPA filter to only one channel of multichannel output with Alsa and PulseAudio

  - by justinzane

  I want to apply a filter, specifically SWH's glame-bandpass-iir, to only one of several output channels. I want unfiltered output to go to the front, rear and LFE channels with bandpass filtered output for the center channel. I'm assuming that this needs to be done with Alsa's /etc/asound.conf but I cannot understand the documentation well enough to figure out how. If there is a better way, via PulseAudio, Jack or whatever, I'm open to whatever works. Thanks.

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• Using TPL and PLINQ to raise performance of feed aggregator

  - by DigiMortal

  In this posting I will show you how to use Task Parallel Library (TPL) and PLINQ features to boost performance of simple RSS-feed aggregator. I will use here only very basic .NET classes that almost every developer starts from when learning parallel programming. Of course, we will also measure how every optimization affects performance of feed aggregator. Feed aggregator Our feed aggregator works as follows: Load list of blogs Download RSS-feed Parse feed XML Add new posts to database Our feed aggregator is run by task scheduler after every 15 minutes by example. We will start our journey with serial implementation of feed aggregator. Second step is to use task parallelism and parallelize feeds downloading and parsing. And our last step is to use data parallelism to parallelize database operations. We will use Stopwatch class to measure how much time it takes for aggregator to download and insert all posts from all registered blogs. After every run we empty posts table in database. Serial aggregation Before doing parallel stuff let’s take a look at serial implementation of feed aggregator. All tasks happen one after other. internal class FeedClient {     private readonly INewsService _newsService;     private const int FeedItemContentMaxLength = 255;       public FeedClient()     {          ObjectFactory.Initialize(container =>          {              container.PullConfigurationFromAppConfig = true;          });           _newsService = ObjectFactory.GetInstance<INewsService>();     }       public void Execute()     {         var blogs = _newsService.ListPublishedBlogs();           for (var index = 0; index <blogs.Count; index++)         {              ImportFeed(blogs[index]);         }     }       private void ImportFeed(BlogDto blog)     {         if(blog == null)             return;         if (string.IsNullOrEmpty(blog.RssUrl))             return;           var uri = new Uri(blog.RssUrl);         SyndicationContentFormat feedFormat;           feedFormat = SyndicationDiscoveryUtility.SyndicationContentFormatGet(uri);           if (feedFormat == SyndicationContentFormat.Rss)             ImportRssFeed(blog);         if (feedFormat == SyndicationContentFormat.Atom)             ImportAtomFeed(blog);                 }       private void ImportRssFeed(BlogDto blog)     {         var uri = new Uri(blog.RssUrl);         var feed = RssFeed.Create(uri);           foreach (var item in feed.Channel.Items)         {             SaveRssFeedItem(item, blog.Id, blog.CreatedById);         }     }       private void ImportAtomFeed(BlogDto blog)     {         var uri = new Uri(blog.RssUrl);         var feed = AtomFeed.Create(uri);           foreach (var item in feed.Entries)         {             SaveAtomFeedEntry(item, blog.Id, blog.CreatedById);         }     } } Serial implementation of feed aggregator downloads and inserts all posts with 25.46 seconds. Task parallelism Task parallelism means that separate tasks are run in parallel. You can find out more about task parallelism from MSDN page Task Parallelism (Task Parallel Library) and Wikipedia page Task parallelism. Although finding parts of code that can run safely in parallel without synchronization issues is not easy task we are lucky this time. Feeds import and parsing is perfect candidate for parallel tasks. We can safely parallelize feeds import because importing tasks doesn’t share any resources and therefore they don’t also need any synchronization. After getting the list of blogs we iterate through the collection and start new TPL task for each blog feed aggregation. internal class FeedClient {     private readonly INewsService _newsService;     private const int FeedItemContentMaxLength = 255;       public FeedClient()     {          ObjectFactory.Initialize(container =>          {              container.PullConfigurationFromAppConfig = true;          });           _newsService = ObjectFactory.GetInstance<INewsService>();     }       public void Execute()     {         var blogs = _newsService.ListPublishedBlogs();                var tasks = new Task[blogs.Count];           for (var index = 0; index <blogs.Count; index++)         {             tasks[index] = new Task(ImportFeed, blogs[index]);             tasks[index].Start();         }           Task.WaitAll(tasks);     }       private void ImportFeed(object blogObject)     {         if(blogObject == null)             return;         var blog = (BlogDto)blogObject;         if (string.IsNullOrEmpty(blog.RssUrl))             return;           var uri = new Uri(blog.RssUrl);         SyndicationContentFormat feedFormat;           feedFormat = SyndicationDiscoveryUtility.SyndicationContentFormatGet(uri);           if (feedFormat == SyndicationContentFormat.Rss)             ImportRssFeed(blog);         if (feedFormat == SyndicationContentFormat.Atom)             ImportAtomFeed(blog);                }       private void ImportRssFeed(BlogDto blog)     {          var uri = new Uri(blog.RssUrl);          var feed = RssFeed.Create(uri);           foreach (var item in feed.Channel.Items)          {              SaveRssFeedItem(item, blog.Id, blog.CreatedById);          }     }     private void ImportAtomFeed(BlogDto blog)     {         var uri = new Uri(blog.RssUrl);         var feed = AtomFeed.Create(uri);           foreach (var item in feed.Entries)         {             SaveAtomFeedEntry(item, blog.Id, blog.CreatedById);         }     } } You should notice first signs of the power of TPL. We made only minor changes to our code to parallelize blog feeds aggregating. On my machine this modification gives some performance boost – time is now 17.57 seconds. Data parallelism There is one more way how to parallelize activities. Previous section introduced task or operation based parallelism, this section introduces data based parallelism. By MSDN page Data Parallelism (Task Parallel Library) data parallelism refers to scenario in which the same operation is performed concurrently on elements in a source collection or array. In our code we have independent collections we can process in parallel – imported feed entries. As checking for feed entry existence and inserting it if it is missing from database doesn’t affect other entries the imported feed entries collection is ideal candidate for parallelization. internal class FeedClient {     private readonly INewsService _newsService;     private const int FeedItemContentMaxLength = 255;       public FeedClient()     {          ObjectFactory.Initialize(container =>          {              container.PullConfigurationFromAppConfig = true;          });           _newsService = ObjectFactory.GetInstance<INewsService>();     }       public void Execute()     {         var blogs = _newsService.ListPublishedBlogs();                var tasks = new Task[blogs.Count];           for (var index = 0; index <blogs.Count; index++)         {             tasks[index] = new Task(ImportFeed, blogs[index]);             tasks[index].Start();         }           Task.WaitAll(tasks);     }       private void ImportFeed(object blogObject)     {         if(blogObject == null)             return;         var blog = (BlogDto)blogObject;         if (string.IsNullOrEmpty(blog.RssUrl))             return;           var uri = new Uri(blog.RssUrl);         SyndicationContentFormat feedFormat;           feedFormat = SyndicationDiscoveryUtility.SyndicationContentFormatGet(uri);           if (feedFormat == SyndicationContentFormat.Rss)             ImportRssFeed(blog);         if (feedFormat == SyndicationContentFormat.Atom)             ImportAtomFeed(blog);                }       private void ImportRssFeed(BlogDto blog)     {         var uri = new Uri(blog.RssUrl);         var feed = RssFeed.Create(uri);           feed.Channel.Items.AsParallel().ForAll(a =>         {             SaveRssFeedItem(a, blog.Id, blog.CreatedById);         });      }        private void ImportAtomFeed(BlogDto blog)      {         var uri = new Uri(blog.RssUrl);         var feed = AtomFeed.Create(uri);           feed.Entries.AsParallel().ForAll(a =>         {              SaveAtomFeedEntry(a, blog.Id, blog.CreatedById);         });      } } We did small change again and as the result we parallelized checking and saving of feed items. This change was data centric as we applied same operation to all elements in collection. On my machine I got better performance again. Time is now 11.22 seconds. Results Let’s visualize our measurement results (numbers are given in seconds). As we can see then with task parallelism feed aggregation takes about 25% less time than in original case. When adding data parallelism to task parallelism our aggregation takes about 2.3 times less time than in original case. More about TPL and PLINQ Adding parallelism to your application can be very challenging task. You have to carefully find out parts of your code where you can safely go to parallel processing and even then you have to measure the effects of parallel processing to find out if parallel code performs better. If you are not careful then troubles you will face later are worse than ones you have seen before (imagine error that occurs by average only once per 10000 code runs). Parallel programming is something that is hard to ignore. Effective programs are able to use multiple cores of processors. Using TPL you can also set degree of parallelism so your application doesn’t use all computing cores and leaves one or more of them free for host system and other processes. And there are many more things in TPL that make it easier for you to start and go on with parallel programming. In next major version all .NET languages will have built-in support for parallel programming. There will be also new language constructs that support parallel programming. Currently you can download Visual Studio Async to get some idea about what is coming. Conclusion Parallel programming is very challenging but good tools offered by Visual Studio and .NET Framework make it way easier for us. In this posting we started with feed aggregator that imports feed items on serial mode. With two steps we parallelized feed importing and entries inserting gaining 2.3 times raise in performance. Although this number is specific to my test environment it shows clearly that parallel programming may raise the performance of your application significantly.

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• Short keyword-only HTML Title or Long Titles - to rank better

  - by user11221

  I would like to know if long html titles should be used for pages instead of google adwords keyword tool based short titles - for SEO / Ranking purposes? I feel that it is a mistake to use short html titles made up of 2-3 words strictly based on google adwords keyword tool. I have tried using short ones based on what the adwords keyword tool suggested, but that has served me no purpose as I cannot see my website pages anywhere in the search results. Please correct me, if wrong.

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• Loading SpriteFont through a different class than Game.cs

  - by MintyAnt

  I am trying to load up a single SpriteFont to print some debug information. In our current game, we load up both Textures and Music through a ResourceManager. They are both loaded with a filestream, and thus do not require Content.Load SoundEffect soundEffect = SoundEffect.FromStream( fs ); Since this ResourceManager does not inherit from Game or is like Game.cs, I cannot use the usual method: SpriteFont spriteFont = Content.Load<SpriteFont>(resource.Key.Item2); Anyone have any idea how I can either: -Load the SpriteFont a different way -Create my own Contentmanager

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• How to restore .bashrc

  - by Miranda Webb

  Terminal shows this bash: /home/atlas/.bashrc: line 73: syntax error near unexpected token `[' bash: /home/atlas/.bashrc: line 73: `if [ -x /usr/bin/dircolors ] ; then ' I've tried to fix it using "cp /ect/skel/.bashrc ~/" And I get this "cp: cannot stat `/ect/skel/.bashrc': No such file or directory" I'm unsure of why this is doing this and how to fix it. I had previously been in the bashrc file messing around and apparently I've messed something up. All I want to do is restore the bashrc file to factory settings.

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• Aliases not available when using sudo

  - by Danny Roberts

  I was playing around with aliases today and I noticed that aliases don't seem to be available whilst using sudo: danny@kaon:~$ alias alias egrep='egrep --color=auto' alias fgrep='fgrep --color=auto' alias grep='grep --color=auto' alias l='ls -CF' alias la='ls -A' alias ll='ls -alF' alias ls='ls --color=auto' danny@kaon:~$ ll -d / drwxr-xr-x 23 root root 4096 2011-01-06 20:29 // danny@kaon:~$ sudo -i root@kaon:~# ll -d / drwxr-xr-x 23 root root 4096 2011-01-06 20:29 // root@kaon:~# exit logout danny@kaon:~$ sudo ll -d / sudo: ll: command not found Is there any reason why you cannot use aliases whilst using sudo?

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• Drupal and FTP server

  - by burak

  When I install a new module on Drupal, I get this error: Warning: ftp_login(): Login authentication failed in FileTransferFTPExtension-connect() (line 59 of /home/burak/ public_html/beytepe/includes/filetransfer/ftp.inc). Failed to connect to the server. The server reports the following message: Cannot log in to FTP server. Check username and password What can I do? How can I solve this?

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• Which K-factor should be used in case players have different K-factor values

  - by DmitryN

  I am implementing a ranking system based on the Elo rating and cannot get a point about the K-factor. If two players with different skills and, therefore, different K-factors are playing, which exactly K-factor should be used when changing their ratings? For example, player A has rating 2500 and K-factor 16 (probability ~75%) while player B has rating 2300 and K-factor 24 (probability ~25%). If player A wins, do I need to use 16 as K-factor for both players or 16 for player A and 24 for player B?

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• shotwell 0.12 shared library error

  - by blade19899

  i installed shotwell 0.12 like so via its official ppa sudo add-apt-repository ppa:yorba/ppa sudo apt-get update sudo apt-get install shotwell and when i tried to run it via dash it didn't start. i then typed in the gnome-terminal "shotwell" I then got this error error while loading shared libraries: libgexiv2.so.0: cannot open shared object file: No such file or directory my question is how to get shotwell 0.12 up and running in ubuntu 11.10 amd64

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• Google indexing wrong domain that does not work

  - by user174117

  Can anyone tell me why Google indexes a site http://0.3c.7aae.static.theplanet.com instead of the actual domain name (my domain was registered with webmaster tools). The aforementioned link was linking to my site, but has now become a broken link. Initially I tried 301 directs, but nothing worked. The hosting company cannot explain why. Leaving me wondering what to do? Any guidance would be appreciated. Thks

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• How to remove a Facebook App from Facebook's search results?

  - by Gavin

  I have a Facebook app so users can login to my website using their Facebook account, but when you type my website name into Facebook's search (the search box right next to the Facebook logo) the app shows up in the search results. When I click it, it says "Misconfigured App - Sorry, the details for AppName cannot be displayed because the app is misconfigured." I want to remove my app from Facebook's search results, because it's not meant for users, but I can't figure out how to do it. Any ideas?

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• Working with EO composition associations via ADF BC SDO web services

  - by Chris Muir

  ADF Business Components support the ability to publish the underlying Application Modules (AMs) and View Objects (VOs) as web services through Service Data Objects (SDOs).  This blog post looks at a minor challenge to overcome when using SDOs and Entity Objects (EOs) that use a composition association. Using the default ADF BC EO association behaviour ADF BC components allow you to work with VOs that are based on EOs that are a part of a parent-child composition association.  A composition association enforces that you cannot create records for the child outside the context of the parent.  As example when creating invoice-lines you want to enforce the individual lines have a relating parent invoice record, it just simply doesn't make sense to save invoice-lines without their parent invoice record. In the following screenshot using the ADF BC Tester it demonstrates the correct way to create a child Employees record as part of a composition association with Departments: And the following screenshot shows you the wrong way to create an Employee record: Note the error which is enforced by the composition association: (oracle.jbo.InvalidOwnerException) JBO-25030: Detail entity Employees with row key null cannot find or invalidate its owning entity.  Working with composition associations via the SDO web services  Shay Shmeltzer recently recorded a good video which demonstrates how to expose your ADF Business Components through the SDO interface. On exposing the VOs you get a choice of operation to publish including create, update, delete and more: For example through the SDO test interface we can see that the create operation will request the attributes for the VO exposed, in this case EmployeesView1: In this specific case though, just like the ADF BC Tester, an attempt to create this record will fail with JBO-25030, the composition association is still enforced: The correct way to to do this is through the create operation on the DepartmentsView1 which also lets you create employees record in context of the parent, thus satisfying the composition association rule: Yet at issue here is the create operation will always create both the parent Departments and Employees records.  What do we do if we've already previously created the parent Departments records, and we just want to create additional Employees records for that Department?  The create method of the EmployeeView1 as we saw previously doesn't allow us to do that, the JBO-3050 error will be raised. The solution is the "merge" operation on the parent Departments record: In this case for the Departments record you just need to supply the DepartmentId of the Department you want the Employees record to be associated with, as well as the new Employees record.  When invoked only the Employees record is created, and the supply of the DepartmentId of the Departments record satisfies the composition association without actually creating or updating the associated Department record that already exists in the database. Be warned however if you supply any more attributes for the Department record, it will result in a merge (update) of the associated Departments record too. 

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• Getting a WCF service hosted in IIS 7.0

  - by gregarobinson

   This was not as easy as I thought it would be...lots of errors. These links saved me:  http://blah.winsmarts.com/2008-4-Host_a_WCF_Service_in_IIS_7_-and-amp;_Windows_2008_-_The_right_way.aspx http://blog.donnfelker.com/2007/03/26/iis-7-this-configuration-section-cannot-be-used-at-this-path/   

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• Tutorial: Wi-Fi Guru: DD-WRT Router and Wireless Printer

  Q: My Linksys WRT600N flashed with v24 DD-WRT does not work wirelessly with HP7410 all-in-one printer. The printer is able to make a connection, but I cannot ping the printer nor get other programs to recognize it.

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• Dependency problem with mysql-server-core-5.5

  - by Tama

  When I start the Ubuntu software centre, it says I cannot do anything until the package catalog is repaired. However, repairing fails. I ran "sudo apt-get -f install" and found the problem to be: mysql-server-5.5 depends on mysql-server-core-5.5 (= 5.5.24-0ubuntu0.12.04.1); however: Version of mysql-server-core-5.5 on system is 5.5.28-0ubuntu0.12.04.2. So, the question is, how do I install that version and resolve the dependency problem?

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• Audio on beagleboard xM

  - by Francesco

  I am running Ubuntu 12.04 Precise for omap on a beagleboard xM. I am trying to setup audio. No soundcards are listed in /proc/asound/cards. Alsamixer fails with cannot open mixer: No such file or directory Under /dev/snd/ I have only: seq timer Driver's name should be omap3beagle - twl4030. I am using alsa 1.0.24 that is installed by default with Ubuntu 12.04. I've googled a lot but I have not found anything yet. Thanks

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• How to ensure images all loaded before I reference in my HTML canvas [closed]

  - by mark stephens

  I want to draw some images in on a HTML canvas with context.drawImage(Im1 ,205,18,184,38); In order to make sure it loads I need to put in code like this but then I cannot draw things with it var Im1 = new Image(); Im1.src="rechnung11014page1/img/1/Im1.png"; Im1.onload = function() { context.drawImage(Im1 ,205,18,184,38); } Is there a way to load all the images and then execute a block of code using several images?

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• Some problems with the keyboard layout

  - by user203053

  When I press some keys, sometimes some letters are replaced by others. For example e is replaced with "0we" and c with "x9a". Also other keys are changed. My keyboard layout is actually German. But whenever this problem occurs, it changes to English and I cannot change it back. Occasionally everything works fine. How do I find out whether the keyboard is damaged or just some settings are not right?

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• Visual Studio search feature does not seem to be searching for text in CSS files [migrated]

  - by aspdotnetuser

  I noticed that when using Visual Studio's 'Find in files' search feature, it does not appear to search/find text in CSS files even though the text does exist. I can't find anything on the net regarding this issue and cannot determine even if Visual Studio allows you to search for text within CSS files. Hopefully someone can shed some light on this; Is it supposed to allow you to do this? If so, what reasons would explain why this is not working?

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• how to install g++ and openJDK from .deb package

  - by Saurav Shekhar

  I have recently started using ubuntu 12.04 for my dell inspiron 5500 15r. I want to install g++ and javac on my ubuntu.Since my USB modem doesn't support ubuntu i cannot connect my ubuntu to the internet.I have the .deb package of g++-4.4 GNU C++ compiler and openJDK Java 6 Runtime with me. Please explain to me in detail how to install them to my ubuntu. Thank You Saurav Shekhar ph-+91 895 344 1464

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