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• MIX11 Registration is open &ndash; the place to hear the latest on Silverlight, HTML5, IE and more

  - by Eric Nelson

  Every year a few lucky colleagues get to attend MIX – and they come back with nothing but praise for the event, the speakers, the content – and the buzz! If you build “web application” and want the latest from the experts then you should consider attending. You will get to see the latest tools and technologies and draw inspiration from a professional community of your peers and experts. Technologies covered include Silverlight, Internet Explorer, Windows Phone, ASP.NET, HTML5 and CSS3. It takes place April 12th to 14th in Las Vegas Early birds save big! Register by February 11 and save $500 on your conference pass and get one free hotel night. Register Now.

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• Playing a sound on collision?

  - by Eric McLoughlin

  I'm making a pool game. I've separated the gameplay logic and the physics into two systems, entities and physics. Each entity holds a reference to a body which the physics system uses. The body itself holds a reference back to it's owner. When an entity collides with another entity, the Collided(Entity other) method is called on both. What I'm trying to do now is to play a sound when both entities colliding are of a certain subclass. I'm not sure how to do that. I could do it in the Collided method, but then the sound would be played two times at the same time, since the method was called on both entities. How do you suggest I do this?

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• How do I start implementing version control on legacy websites?

  - by Eric

  Assuming no experience with version control systems, just local to live web development. I've been dropped in on a few legacy website projects, and want an easier and more robust way to be able to quickly push and revert changes en masse. I'm currently the only developer on these projects, but more may be added in the future and I think it would be beneficial to set up a system that others can use.

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• The (non) Importance of Language

  - by Eric A. Stephens

  Working with a variety of clients on EA initiatives one begins to realize that not everyone is a fan of EA. Specifically, they are not a fan of the "a-word". Some organizations have abused this term with creating and assigning the title to just about anyone who demonstrates above average prowess with a particular technology. Other organizations will assign the title to those managers left with no staff after a reorg. Some companies, unfortunately, have simply had a bad go of it with regard to EA...or any "A" for that matter. What we call "EA" is almost irrelevant. But what is not negotiable for those to succeed in business is to manage change. That is what EA is all about. I recall sitting in Zachman training led by himself. He posits the only organizations that don't need EA (or whatever you want to call it) are those that are not changing. My experience suggests those orgs that aren't changing aren't growing. And if you aren't growing, you're dying. Any EA program will not succeed unless there is a desire to change. No desire to change suggests the EA/Advisor/Change Agent should just walk the other way.

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• 45 Different Services, Sites, and Apps to Help You Read Your Favorite Sites (Like How-To Geek)

  - by Eric Z Goodnight

  Ever wonder how geeks stay connected with their favorite blogs and writers? Read on to learn about RSS feeds and how easy they are to use with these 45 apps, services, and websites that can help you stay current. Note: of course, our more geeky readers are going to understand a lot of this already, which is why we included 45 great services that you might not have heard about before. Keep reading for more, or give you advice to the newbies in the comments Latest Features How-To Geek ETC HTG Projects: How to Create Your Own Custom Papercraft Toy How to Combine Rescue Disks to Create the Ultimate Windows Repair Disk What is Camera Raw, and Why Would a Professional Prefer it to JPG? The How-To Geek Guide to Audio Editing: The Basics How To Boot 10 Different Live CDs From 1 USB Flash Drive The 20 Best How-To Geek Linux Articles of 2010 Lord of the Rings Movie Parody Double Feature [Video] Turn a Webpage into an Asteroids-Styled Shooting Game in Opera Dolphin Browser Mini Leaves Beta; Sports New GUI, Easy Bookmarking, and More Updated Google Goggles Scans Faster; Solves Sudoku Puzzles Snowy Castle Retreat in the Mountains Wallpaper Fix TV Show Sorting Issues on iOS Devices

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• USB internet not accessible

  - by Eric

  I'm brand new to ubuntu and linux. We access internet from a usb stick issued by a local telephone company. When I plug the stick into the computer, I see the device listed under internet connections as a mobile broadband device but it is grayed out and inaccessible. I tried to create a new mobile broadband connection but my country (Gabon) is not listed and we have no payment plans per se (we pay from a pre-paid card system).. Any clues as to how I can get the system to recognize the internet connection? Thanks for any help...

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• Upgraded from 11.4 to 11.10, There was an error, now the system won't initiialize

  - by Eric

  This morning the system gave me a message that my Version (11.4) was no longer supported, and I took the 'upgrade' option (- 11.10). While installing the various components I encountered a message to the effect that the there was an error and the system may have become unusable. Among the messges: E:Sup-process /usr/bin/dpkg received a segmentation fault...returned an error code (1). I was given an option to do several things, one of which seemed to mean that it would attempt to roll back to the previous version (the default), which I took. After the process ran it said the upgrade process had finished, but there were errors. I attempted to initialize a console so I could enter ubuntu-bug update-manager /var/log/dist-upgrade, per the instructions I received when I received the error message, but the console failed during initialization. I restarted the machine, and the screen has stopped with the following contents: * Starting bluetooth * Stopping save kernel messages * Starting CUPS printing spooler/server * PulseAudio configured per-user sessions saned disabled: edit /etc/default/saned $starting up Cisco VPN daemon *Starting anac(h)ronistic cron *Stopping anac(h)ronistic cron Each of these steps followed by [ OK ] What are my options? Any help appreciated!

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• Analytics - how to tell where converted traffic came from?

  - by Eric

  I must be missing something obvious. I have Analytics set up with conversion tracking (goals), and I had 4 customers complete the goals yesterday. I'm trying to find out where those 4 customers came from (organic search? if organic, what keywords? etc) but I can't figure out how to do that in Adwords. When I click into the goal tracking overview, I see my 4 customers and it breaks it down so I see that 3 of them came from adwords (cpc) and 1 of them came from organic. I'd like to know exactly what ads brought the traffic and what keywords on the organic search led them to me. How can I do this? It seems like a simple request... but I can't figure it out... thanks for your help!

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• Poll on Entity Framework 4 &ndash; one year on

  - by Eric Nelson

  12 months back (today is March 15th 2010) on the 16th of  March 2009 I created a poll on Entity Framework v1 – the marmite of ORMs? A quick poll…. Entity Framework v1 was getting a mixed reception at the time – I met developers who genuinely hated it and I met developers who were loving the productivity improvements they were seeing. There were definitely issues with v1, too many IMHO. Which is why the product team placed a huge effort on listening to the community to drive the feature set for v2 (which ultimately was named Entity Framework 4 as it ships with .NET 4). I think overall the team have done a great job. It isn’t perfect in .NET 4 (which is why the team are busy on post .NET 4 improvements) but I would happily use it and recommend it for a wide variety of projects – much wider than I would have with v1. I am speaking on EF 4 at www.devweek.com this Wednesday and I thought it would be fun to put a new version of the poll out and see how v4 is being received. Obviously the big difference is we have not yet shipped EF4 vs when I did the original poll on EF1. March 2010 poll – please vote Summary of March 2009 poll – it was a tie between positive and negative Total votes 150 Positive about EF v1 42 (15 + 19 + 8) Negative about EF v1  43 (34 + 9)

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• Advice on how to build html5 basic tile game (multi player, cross device)

  - by Eric

  I just read http://buildnewgames.com/real-time-multiplayer/ which explains the fundamentals and bets practices to build a massive real time multiplayer html5 game. My question is however given the “simplicity” of the game I need to build (simple kind of scratch game where you find or not something behind a tile), do I really need complex tools (canvas or node.js for example) ? The game The gamestakes place with a picture of our office as a background (tilemap). For HR purpose, we wish to create the following game fore employees: each day they can come to the website and click on a certain number of tiles (3 max per day) and find behind it motivation advice and interesting facts about the company. The constraints and rules the screen is divided into isometric 2D square tiles. There are basically an image (photograph of our office) number of tiles on the screen game: about 10,000 to much more (with scroll , see below) the players can scroll in 4 directions there are only 2 types of tiles: already open and closed player can open tiles that have not been yet open by other players there is no path for players : any player can click on any tile on the screen at any moment (if it’s not already done by another player) 2 players can’t be on the same tile at the same moment (or if they can, I’ll have to manage to see which one clicked on it first) only one type of player (all with similar roles), no weapon, no internal score… very simple game. no complex physics (collision only occurs if 2 players are on the same tile) The target I need to achieve: cross device, cross browsers high performance reaction (subsecond reactions) average nb of players per hour: up to 10K players per hour (quite high indeed but it’s because we aim at proving our case for the game to our business unit) So what I would like to know: 2D Tiled map: Do I need tiledmapeditor or can I enable me split the screen like here ? should I use canvas or plain html/css could be sufficient for my need? do I need a game engine/framework such as melon.js or crafty./js ? (even if the game play is extremely basic, I do need mouse and touché device support, mouse emulations on touch devices…) or ca I easily/quickly do it without? for my constraints and targets, should I use CPU acceleration ? for my constraints and targets, should I use web workers ? for the database, for a massively real time game should I avoid to put the current locations of player in MySQL as i feel it might slow me down. What kind of DB should I implement ? Thanks for your help !

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• Why can't I mount the Ubuntu 12.04 installer ISOs in Mac OS X?

  - by eric

  Over the past few days, I have downloaded both the 32 and 64 bit version of server and desktop to install on an Intel based PC. It is normal from within OS X to double click on an ISO and it will mount the ISO in the finder as well as within disk utility. When I attempt to mount any of the Ubuntu ISOs I downloaded, OS X returns the error message The following disk images couldn't be opened. The reason given for the error is no mountable filesystem. However, I am still able to open the ISO directly from disk utility and burn it to a DVD/CD. What has changed in this release to cause this? Is there something wrong with the current ISOs? The OS X machine I am using is only two weeks old and is having no issues with any other ISO.

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• What is the best objective way to measure language popularity trends? (What's better than TIOBE?)

  - by Eric Wilson

  The best way to get data on computer language popularity that I know is the TIOBE index. But everyone knows that TIOBE is hopelessly flawed. (If someone provides a link to support this, I'll add it here.) So is there any data on programming language popularity that is generally considered meaningful? The only other option I know is to look at the trends at indeed.com, which is inherently flawed, being based on job postings. It isn't like I would make a future language decision solely based on an index, but it might provide a useful balance to the skewed perspective one obtains by talking to ones friends and colleagues. To illustrate that bias, I'll point out that based on the experience of those I personally know, the only languages used professionally today (in order of popularity) are Java, C#, Groovy, JavaScript, Ruby, Objective C, and Perl. (Though it is evident that C, C++ and PHP were used in the past.) So my question is, everyone bashes TIOBE, but is there anything else? If so, can anyone explain how we know the alternative has better methodology? Thanks.

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• Cannot get grub menu to timeout (or go away)

  - by Eric

  I am running Ubuntu 12.04. I cannot for the life of me get the grub menu (with options) to go away. I would like it to auto-boot into the first option. I've edited /etc/default/grub so that it looks like the following: GRUB_DEFAULT=0 GRUB_HIDDEN_TIMEOUT=0 GRUB_HIDDEN_TIMEOUT_QUIET=true GRUB_TIMEOUT=10 GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian` GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" GRUB_CMDLINE_LINUX="" After this, I ran sudo update-grub. Then I realized that I had grub 2, so I ran sudo update-grub2 (both make it look like they create the grub.cfg file successfully. I restart my computer and it goes back to the grub menu and just sits there until I make a choice. This is not desirable if the power goes out... :-) I also tried reinstalling grub using sudo grub-install /dev/sda - also unsuccessful

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• How should I implement the repository pattern for complex object models?

  - by Eric Falsken

  Our data model has almost 200 classes that can be separated out into about a dozen functional areas. It would have been nice to use domains, but the separation isn't that clean and we can't change it. We're redesigning our DAL to use Entity Framework and most of the recommendations that I've seen suggest using a Repository pattern. However, none of the samples really deal with complex object models. Some implementations that I've found suggest the use of a repository-per-entity. This seems ridiculous and un-maintainable for large, complex models. Is it really necessary to create a UnitOfWork for each operation, and a Repository for each entity? I could end up with thousands of classes. I know this is unreasonable, but I've found very little guidance implementing Repository, Unit Of Work, and Entity Framework over complex models and realistic business applications.

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• Syncing between computers / batch download

  - by Eric

  I have synced files from two different devices. Now I want to copy to contents of the synced files to the other device. Using the web interface, it seems only possible to download one file at a time. Is there a way to setup automatic sync or to download all the files in a folder with one step? Thanks in advance for your time. I was using the web interface to ubuntu, but an answer for Ubuntu One would also be ok.

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• Name resolution for the name <name> timed out after none of the configured DNS servers responded.

  - by Paul Brown

  Installed Windows 7 (previously ran XP and Vista with no problems) a couple of weeks ago and I'm at least once a day getting the above error show up in the event logs and losing all internet connection. The only current way to resolve it is to reboot my cable modem. My ISP have been running diagnostics on it and tell me there is no problem whatsoever. I've configured my router (and PC on occasion) to point at OpenDNS - still occurs. I've had the PC directly connected to the modem - still occurs. If I can give more info that might of use please ask thanks Update: After moaning at my ISP for a couple of weeks (VirginMedia) they agreed to send me out a new cable modem ... and I've not had the issue since.

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• With Ubuntu Linux (10+), how do I connect to remote to my machine from Windows

  - by Berlin Brown

  I tried to to remote into my Ubuntu machine. I enabled the setting on Ubuntu and that side seems to work. But I get a connection time out when I use RealVNC on the Windows box. I believe it is a firewall issue. I disabled the firewall for that application on Windows but I don't know how to check if the firewall is enabled on the windows machine. I am on a local network with a router. Ideally, I would want to block that remote control port at the Internet level/router level but "enable" that port on the Windows box and the Ubuntu box. How do I check those settings.

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• Validating SSL clients using a list of authorised certificates instead of a Certificate Authority

  - by Gavin Brown

  Is it possible to configure Apache (or any other SSL-aware server) to only accept connections from clients presenting a certificate from a pre-defined list? These certificates may be signed by any CA (and may be self-signed). A while back I tried to get client certificate validation working in the EPP system of the domain registry I work for. The EPP protocol spec mandates use of "mutual strong client-server authentication". In practice, this means that both the client and the server must validate the certificate of the other peer in the session. We created a private certificate authority and asked registrars to submit CSRs, which we then signed. This seemed to us to be the simplest solution, but many of our registrars objected: they were used to obtaining a client certificate from a CA, and submitting that certificate to the registry. So we had to scrap the system. I have been trying to find a way of implementing this system in our server, which is based on the mod_epp module for Apache.

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• Experience with MooseFS?

  - by brown.2179

  Anyone have any experience using MooseFS? I want an easy distributed storage platform to store static data archive of about 10 TB and serve it to 20-40 nodes. Also I want to be able to add storage as the archive grows without having to rebuild the filesystem. I don't care if it's a bit slow. I just want it to be simple and stable. Basically from what I can see for OS X it's between MooseFS and Gluster. Any other suggestions?

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• Can I talk while playing music?

  - by Zachary Brown

  I have taken the advice of some people on here to use Shoutcast for my online radio station, but I have run into a problem. I need to be able to talk while the music is playing. Not through the entire song of course, just to tell what the song is and stuff like that. I know this is possible, a little Googling told me that but what I wasn't able to find is how to do that!

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• How do I use the iPhone Calculator's modulus function?

  - by Josh Brown

  I've tried several ways and can't get the iPhone Calculator's modulus function. If I want to compute, say, 5 % 3, what buttons do I press to get it to work? When I try pressing 5, then %, Calculator immediately displays 0.05. Is the mod function broken or am I pressing the buttons in the wrong order? I'm running iPhone OS 3.1.3.

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• Improving Performance of RDP Over LAN

  - by Jared Brown

  Architecture: A deployment of 6 new HP thin clients (Windows XP Embedded) with TCP/IP access to several new HP servers (Windows 2003 Server). Each thin client is connected over fiber optic to a Gigabit Cisco switch, which the servers are connected to. There are 10/100 Ethernet to fiber converter boxes on each end of the fiber cables. Problem: Noticeable lag over RDP while using the Unigraphics CAD package. 3D models take .5 to 1 second to respond to mouse actions. Other Details: Network throughput on each thin client's RDP session is 7288 kbps. RDP connection settings - color setting: 15k, all themes, etc. turned off. Local and remote system performance stats are well within norms (CPU, Memory, and Network). Question: Are there newer versions of terminal services or RDP I can use on my existing OSes? Are there compression algorithms, etc. that are well suited for a high-bandwidth LAN? Are there valid alternatives that will yield higher performance (i.e. UltraVNC with drivers installed)? Are there TCP/IP tuning options I can exploit?

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• Apache and mod_authn_dbd DBDPrepareSQL error

  - by David Brown

  I am running Apache 2.2.17 on Suse Linux 11. I have installed the mod_authn_dbd module to allow authentication using a MySQL database. Simple digest authentication works absolutely fine using the following directive: AuthDBDUserRealmQuery "SELECT loginPassword FROM login WHERE loginUser = %s and loginRealm = %s" However, I would like to both generalize this statement and prepare it for performance and security reasons. Thus, I used the following directives instead: DBDPrepareSQL "SELECT loginPassword FROM login WHERE loginUser = %s and loginRealm = %s" digestLogin AuthDBDUserRealmQuery digestLogin These directives generate the following errors: [...] [error] (20014)Internal error: DBD: failed to prepare SQL statements: [...] [error] (20014)Internal error: DBD: failed to initialise Why does my actual SQL statement work when used directly, but not when I try to prepare it? (Note I have tried using '?' and '%%' in place of '%', to no effect.)

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• Running SSL locally on a hosts redirected domain name with Ubuntu and Apache

  - by Matthew Brown

  I recently made some changes to my Ubuntu computer so that a domain name resolved to my local copy of Apache. I edited /etc/hosts and added 127.0.0.1 thisbit.example.com Then set up a VirtualHost for the responses I wishes to create. That all works fine and my testing is now shooting on ahead without harm or risk tot he production server. Now for my next trick I need to test the authentication and so need to do this with HTTPS Basically https://auth.example.com needs to work on my PC without the SSL causing an issue which I imagine would be the case as I am clearly not the true https://auth.example.com but for the basis of this exercise I need to pretend that I am. Now it might be that the Apps I'm testing don't worry about checking the certificate. (Many are in Java which I'm no expert with). What gotchas am I likely to encounter and what is the best way of not letting my own hacks spoil my testing? I'm guessing the place to start is to enable SSL with Apcahe... I've never done that before as it has never come up before.

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• Apache virtual host proxy to nginx for ruby

  - by Kevin Brown

  I'm running a few php sites off apache and want to start rails dev. I've installed rvm/nginx and can get my ruby site by going to websiteroot.com:8000... How do I pass ruby.websiteroot.com to websiteroot.com:8000? What's the best way for me to route a subdomain for ruby dev?? I'd switch to nginx completely if it weren't for all my php sites--seems like it's easier to just proxy for ruby. Advice? My nginx config looks like this: server{ listen 8000; server_name website.com; root /home/me/sites/ruby_folder/public; ... } My apache config looks like this: <VirtualHost> ServerName ruby.website.com ProxyPreserveHost on ProxyPass / http://127.0.0.1:8000 ProxyPassReverse / http://127.0.0.1:8000 </VirtualHost>

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