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• How to make sure you server NIC performance is at best on Windows?

  - by Bobb

  I realised that I followed some obscure paper on setting NICs on Windows for too long. It might be outdated with new hardware released in past couple of years and with W2008R2. I read a bit about offloading and RSS settings on Windows and I realiased that it is very much circumstantial. Noone can really say - enable that and disable this. etc. So what I really want is for my next server try and setup testing environment and measure how my particular application will behave with different settings. The target is going to be latency of TCP primarily. Please note I am talking about latency inside the box. Are there precision tools for Windows to measure latency (down to microseconds)? P.S. I know this is not easy question. Windows time drift is awful problem for any precision test but still I am sure I am not the fist person to need that... Please share your experience

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• How to customize live Ubuntu CD?

  - by karthick87

  I would like to customize Ubuntu live CD by installing some additional packages. I have followed this link but it doesn't seems to work. Can anyone provide clear instructions? Thanks in advance! Customization Packages that I want to install: Thunderbird Samba SSH Changes that I need: Remove Games menu from the Application menu Firefox shortcut on desktop Radiance as the default theme Different default Ubuntu wallpaper Note I do not prefer Remastersys, manual way will be appreciated. updates I want the panel to be placed at the bottom. I want to paste my samba configuration file instead of default samba configuration. And i have few firefox shortcuts and Folders, i have to show that in Desktop. Also it will be nice if you say me how to change the icon sets. Recent Updates I have customized ubuntu 10.10 with firefox shortcuts and few folders on desktops. Everything went smooth. But the installer gets crashes after choosing the timezone. How do i fix this issue? Also setting wallpaper affects the login screen. The wallpaper which i set is displayed on the login screen also. I just want the default one for the login screen.

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• why skype is not available on messengers like pidgin

  - by sterz

  i really like pidgin, empathy etc. (especially pidgin) because they gather all accounts like xmpp, msn etc. together except skype. i know skype uses a proprietary protocol but so does msn and it is available on pidgin. is it that hard to "put" skype on pidgin or alike messengers? what is the reason that skype is not implemented in pidgin? note: i know there is a plugin for pidgin to support skype but it requires the official skype client to be installed and running. pretty useless.

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• How to divide work to a network of computers?

  - by Morpork

  Imagine a scenario as follows: Lets say you have a central computer which generates a lot of data. This data must go through some processing, which unfortunately takes longer than to generate. In order for the processing to catch up with real time, we plug in more slave computers. Further, we must take into account the possibility of slaves dropping out of the network mid-job as well as additional slaves being added. The central computer should ensure that all jobs are finished to its satisfaction, and that jobs dropped by a slave are retasked to another. The main question is: What approach should I use to achieve this? But perhaps the following would help me arrive at an answer: Is there a name or design pattern to what I am trying to do? What domain of knowledge do I need to achieve the goal of getting these computers to talk to each other? (eg. will a database, which I have some knowledge of, be enough or will this involve sockets, which I have yet to have knowledge of?) Are there any examples of such a system? The main question is a bit general so it would be good to have a starting point/reference point. Note I am assuming constraints of c++ and windows so solutions pointing in that direction would be appreciated.

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• MacBook Air with Bootcamp - How to partition?

  - by Andrew

  I want to buy a MacBook Air for my wife with a 128GB SSD. She has to use Windows 7 but I would like to keep OS X for myself to use somtimes. Using Bootcamp, is it feasible to install the following? Mac partition: 36GB with Mac OS X and Microsoft Office 2011 Word, Excel & Powerpoint and Skype. (minimal use) Windows partition: 92GB with Windows 7 professional and Microsoft Office 2010 Word, Excel & Powerpoint, and Skype (daily use) Media to be kept on SD card or external USB3 drive. (Note: Using Parrallels may save space, but my wife won't go for the user experience)

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• How do I get a Dell Latitude e6420 working?

  - by David_G

  I've just installed Ubuntu 12.04 (64-bit) on a brand new Dell Latitude e6420, and I'm having a few problems. This laptop has an Optimus (?) setup - i.e. integrated gfx and an Nvidia Quadro NVS 4200M. First problem - I ran setup, etc, and discovered that I can only run unity2d - If I try and login with unity3d, it just defaults to 2d. This is with nvidia-current installed (302.07). Note also that I can't run nvidia-settings ("You do not appear to be using the NVIDIA X driver."), and there is no additional drivers found ("No proprietary drivers are in use on this system"). I tried to troubleshoot this, and removed nvidia, leaving (I guess) just Nouveau drivers - In that case, unity3d did work, but I was stuck with the open source Nouveau drivers powering the integrated graphics. So, obviously, I want to run unity3d, and be using the more powerful Nvidia graphics card. I've tried a bit of tinkering around, but I'm not sure the best way to proceed, or perhaps more importantly, I'm not sure of what the best final solution might be. I've heard about bumblebee - but frankly, I would prefer to have the proprietary Nvidia drivers working properly. Any help would be much appreciated!

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• Is SEO affected negatively by having densely encoded identifiers of content in URLs?

  - by casperOne

  This isn't about where to put the id of a piece of unique content in URLs, but more about densely packing the URL (or, does it just not matter). Take for example, a hypothetical post in a blog: http://tempuri.org/123456789/seo-friendly-title The ID that uniquely identifies this is 123456789. This corresponds to a look-up and is the direct key in the underlying data store. However, I could encode that in say, hexadecimal, like so: http://tempuri.org/75bcd15/seo-friendly-title And that would be shorter. One could take it even further and have more compact encodings; since URLs are case sensitive, one could imagine an encoding that uses numbers, lowercase and uppercase letters, for a base of 62 (26 upper case + 26 lower case + 10 digits): 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz For a resulting URL of: http://tempuri.org/8M0kX/seo-friendly-title The question is, does densely packing the ID of the content (the requirement is that an ID is mandatory for look-ups) have a negative impact on SEO (and dare I ask, might it have any positive impact), or is it just not worth the time? Note that this is not for a URL shortening service, so saving space in the URL for browser limitation purposes is not an issue.

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• running more than one command line commands inside for loop

  - by klijo

  i have a folder containing images and i want to determine its Compression method used. So i would loop through the folder and do a grep Compression like this and note i have installed grep for windows for %f in (*.jpg) do identify -verbose "%f" | grep Compression >> info.txt However i need to write the file name and compression technique used so i modified the above command for %f in (*.jpg) do identify -verbose "%f" | grep Compression & echo "%f" & echo: >> info.txt But the problem is that i get a blank txt file. Could someone pleas help me.

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• unexpected behaviour of Ctrl-a x and Ctrl-a X in screen?! regions, locking

  - by gojira

  According to the screen manual (version 4.0.2.) C-a x C-a C-x (lockscreen) Lock this terminal. C-a X (remove) Kill the current region. But what actually happens when I use it (Screen version 4.00.03 (FAU) 23-Oct-06): C-a X locks the terminal and asks me for the password. When I enter the correct passwword, I am back in screen but the region is killed (wtf) C-a x does nothing apparently Please note the differences between x (lowercase) and X (uppercase). Why is there a mixup between the functionalities of C-a X and C-a x? How can I fix this? I am on CentOS release 5 (Final).

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• Exchange 2007 mailbox reassignment

  - by John Virgolino

  I am trying to move a mailbox from one user account to another within a single AD domain. We are using Exchange 2007. I have followed these steps: Disable the account From "Disconnected Mailbox" container, connect to the new account I get a success message When I try to login to OWA using the new user account, I get this message: Outlook Web Access could not connect to Microsoft Exchange. If the problem continues, contact technical support for your organization. Request Url: https://mail.somedomain.com:443/owa/default.aspx User host address: 1.2.3.4 Exception Exception type: Microsoft.Exchange.Data.Storage.ConnectionFailedTransientException Exception message: Cannot open mailbox /o=cgsexchangeorganization/ou=exchange administrative group (fydibohf23spdlt)/cn=recipients/cn=someuser. NOTE: I changed some identifying information for security purposes. I have tried multiple times and get to the same place. When I login to OWA with old account, I get an error that the mailbox cannot be found, which makes total sense. Does anybody have any ideas on this? Thanks!

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• What is a Relational Database Management System (RDBMS)?

  A Relational Database Management System (RDBMS)  can also be called a traditional database that uses a Structured Query Language (SQL) to provide access to stored data while insuring the integrity of the data. The data is stored in a collection of tables that is defined by relationships between data items. In addition, data permitted to be joined in new relationships. Traditional databases primarily process data through transactions called transaction processing. Transaction processing is the methodology of grouping related business operations based predefined business events. An example of this can be seen when a person attempts to purchase an item from an online e-tailor. The business must execute specific operations for a related  business event. In this case, a business must store the following information: Customer Info, Order Info, Order Item Info, Customer Payment Data, Payment Results, and Current Order Status. Example: Pseudo SQL Operations needed for processing an online e-tailor sale. Insert Customer into Customers Insert New Order into Orders Insert Each New Order Item into OrderItems Insert Customer Payment Info into PaymentInfo Insert Payment Processing Result into PaymentDetails Update Customer for Current Order Status Common Relational Database Management System Microsoft SQL Server Microsoft Access Oracle MySQL DB2 It is important to note that no current RDBMS has fully implemented all of the Relational Principles. Common RDBMS Traits Volatile Data Supports Transaction Processing Optimized for Updates and Simple Queries 

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• Activating Sharepoint Server Publishing Infrastructure returns "Column Limit Exceeded"

  - by Haydar

  I am getting the following error when attempting to activate the Sharepoint Server Publishing Infrastructure. There are only about 140 columns defined in the entire site collection. I had previously activated and subsequently deactivated this feature. I don't know whether this might be causing the problem. But I really have no idea. I am a developer and this is my first question on serverFault. Please be gentle. Error Message: Column Limit Exceeded. There are too many columns of the specified data type. Please delete some other columns first. Note that some column types like numbers and currency use the same data type. Troubleshoot issues with Microsoft SharePoint Foundation. Correlation ID: 2ec9ae3a-5464-4922-9760-874099f51420 Date and Time: 11/8/2010 3:43:44 PMDate and Time: 11/8/2010 3:43:44 PM

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• Why is Python used for high-performance/scientific computing (but Ruby isn't)?

  - by Cyclops

  There's a quote from a PyCon 2011 talk that goes: At least in our shop (Argonne National Laboratory) we have three accepted languages for scientific computing. In this order they are C/C++, Fortran in all its dialects, and Python. You’ll notice the absolute and total lack of Ruby, Perl, Java. It was in the more general context of high-performance computing. Granted the quote is only from one shop, but another question about languages for HPC, also lists Python as one to learn (and not Ruby). Now, I can understand C/C++ and Fortran being used in that problem-space (and Perl/Java not being used). But I'm surprised that there would be a major difference in Python and Ruby use for HPC, given that they are fairly similar. (Note - I'm a fan of Python, but have nothing against Ruby). Is there some specific reason why the one language took off? Is it about the libraries available? Some specific language features? The community? Or maybe just historical contigency, and it could have gone the other way?

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• Why are "Inverted Colors" considered an accessibility feature? [migrated]

  - by RLH

  Why is it that in Apple software (OS X and iOS,) the "Inverted Colors" display feature is considered an accessibility option? I understand that some users are color-blind. This would justify the Black & White, or grey-scale modes. What I don't understand is how or why does inverting the display color help someone with any specific, visual impairment or dysfunction. As a programmer that wants to understand the need so that I can develop better, accessible software, what purpose does this feature serve to the end user who has some form of visual impairment? NOTE: I felt that this was a hard question to categorize on StackExchange. I settled here on Programmers because I assume that questions of accessibility are important to all developers and this question sits somewhere in the middle between topics that StackOverflow and SuperUser may cover. Also, this question isn't specific to Apple software. I've just noticed that this feature has been available on Macs for a very long time, it's a feature on iOS, and it's always associated with the Accessibility settings. If I can garner some information regarding the needs of some users, I think that I can develop better, accessible software.

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• PHP pages are not parsed by Apache on CentOS

  - by infotoknowledge

  I have installed Centos 5.x, Apache 2.2, PHP 5.3 and MySQL 5.5. I also installed phpMyAdmin. I am able to access phpMyAdmin through the browser without any issues. However, when I create a simple index.php with phpinfo() function in the default directory, that page is served without php parsing. As we all know, phpMyAdmin is a php application. This is working fine from the same server but not the simple php page from the doc root directory ??!!!. Of course, I tried moving this page into phpMyAdmin folder and tried accessing it, but no success. Please note that I updated httpd.conf file with appropriate directives based on the php installation guide. docroot - /var/www/html phpMyAdmin folder - /var/www/html/phpMyAdmin Any help is appreciated.

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• SharePoint: UI for ordering list items

  - by svdoever

  SharePoint list items have in the the base Item template a field named Order. This field is not shown by default. SharePoint 2007, 2010 and 2013 have a possibility to specify the order in a UI, using the _layouts page: {SiteUrl}/_layouts/Reorder.aspx?List={ListId} In SharePoint 2010 and 2013 it is possible to add a custom action to a list. It is possible to add a custom action to order list items as follows (SharePoint 2010 description): Open SharePoint Designer 2010 Navigate to a list Select Custom Actions > List Item Menu Fill in the dialog box: Open List Settings > Advanced Settings > Content Types, and set Allow management of content types to No  On List Settings select Column Ordering This results in the following UI in the browser: Selecting the custom Order Items action (under List Tools > Items) results in: You can change your custom action in SharePoint designer. On the list screen in the bottom right corner you can find the custom action: We now need to modify the view to include the order by adding the Order field to the view, and sorting on the Order field. Problem is that the Order field is hidden. It is possible to modify the schema of the Order field to set the Hidden attribute to FALSE. If we don’t want to write code to do it and still get the required result it is also possible to modify the view through SharePoint Designer: Modify the code of the view: This results in: Note that if you change the view through the web UI these changes are partly lost. If this is a problem modify the Order field schema for the list.

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• What are the components required to run taskpads on a workstation?

  - by Darktux

  we are planning to implement task pads in our enviroment for delegation for user administration.I have few questions regarding this. 1.) To run a taskpad (with AD users and computers) ; does the workstation contain whole set of Administrative tools oris there a way just to compy dsa.msc to all workstations and get done with? Note: All tak pads will be shared on a file share and users access them via powershell scripts. 2.) We are creating MMC's in Windows 7 and keeeping them in a share; will the work with Windows XP too or do we need to develop 2 versions of them? We are aiming to keep away software from workstations and maintain it as much as possible on centralized file shares. Please shoot me any questions or clarifications pertaining to my query.

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• Printer Canon MP540 succesfully added finally but doesn't print? (Attached Debug log)

  - by NES

  i tried to setup my printer in Ubuntu 10.10. I had to use special guide to install because Canon used libcupsys2 in its packages and ubuntu expects libscupsys i followed this guide in reference to this advice. The first problem was this one (the ubuntu "add printer dialog asked for root credentials". The suggested workarout in Launchpad to create a root password worked. Now i added the printer. It's available for printing. Then i got an error message "cups insecure filter" which prevented me from printing. That could be solved by setting the need root rights in the /usr/lib/cups/filter/ directory. The error message disappeared after restarting cups service. Now it should work but it doesn't. The main problem is now, the printer seems to be proper setup but when i try to print a document, the printer icon appears for short time in gnomepanel. There's a printing job in Queue which got completed, but the printer doesn't print. I attached the Debuglog provided by printer error control, had to upload to another site, since it was to big in the question body here. Perhaps someone can identify the problem with it? Note: i know that it once worked fine with an older release of Ubuntu, but not sure which version this was.

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• Who should have full visibility of all (non-data) requirements information?

  - by ebyrob

  I work at a smallish mid-size company where requirements are sometimes nothing more than an email or brief meeting with a subject matter manager requiring some new feature. Should a programmer working on a feature reasonably expect to have access to such "request emails" and other requirements information? Is it more appropriate for a "program manager" (PGM) to rewrite all requirements before sharing with programmers? The company is not technology-centric and has between 50 and 250 employees. (fewer than 10 programmers in sum) Our project management "software" consists of a "TODO.txt" checked into source control in "/doc/". Note: This is nothing to do with "sensitive data access". Unless a particular subject matter manager's style of email correspondence is top secret. Given the suggested duplicate, perhaps this could be a turf war, as the PGM would like to specify HOW. Whereas WHY is absent and WHAT is muddled by the time it gets through to the programmer(s)... Basically. Should specification be transparent to programmers? Perhaps a history of requirements might exist. Shouldn't a programmer be able to see that history of reqs if/when they can tell something is hinky in the spec? This isn't a question about organizing requirements. It is a question about WHO should have full VISIBILITY of requirements. I'd propose it should be ALL STAKEHOLDERS. Please point out where I'm wrong here.

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• Resume on 30 Days of SharePoint

  Dear readers, as you might have noticed... It was an organisational desaster on my end! Even though I continued my studies and research on Microsoft SharePoint 2013 during the last 30 days, I wasn't able to write an article a day to keep you posted on my progress. Nonetheless, I gathered a good number of additional blogs, mainly SharePoint MVP sites, and online forums which will be helpful in the next couple of weeks while I'm actually going to develop a C#-based client which will enable an existing 'legacy' application to SharePoint as a document management system (DMS) besides other already existing solutions. Finding excuses Well, no. Not really. I simply didn't block any or enough time every day to write down my progress during my own challenge. My log book on learning about SharePoint stands at 41 hours and 15 minutes during this month. Which means that I spent an average of more than 1 hour per day on getting into SharePoint. I know that might sound a little bit low but also keep in mind that I went for the challenge on top of my daily job and private responsibilities. During the same period there had been two priority 0 incidents from clients - external root cause - which took presedence over this leisure project. More to come Anyway, it was a first trial and despite the low level of reporting on my blog, I'm confident about what I learned during the last 30 days, and I'm ready to implement the client's requirements. At least, I would say that I have a better understanding about the road map or the path to walk during the next month. As time and secrecy allows I'm going to note down some bits and pieces... During the process of development, I'm going to 'cheat' on the challenge summary article and add links to those new entries. Just for the sake of completeness. Next challenge? Hmm, there had been ideas during the last meetup of the Mauritius Software Craftsmanship Community (MSCC) regarding certifications in IT and eventually we might organise some kind of a study group for specific exams, most probably Microsoft exams towards MCSD Web Developer or Windows Developer.

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• iTunes Home Sharing with VPN

  - by Philip Crumpton

  I'm trying to set up a VPN on a Windows machine that contains my iTunes library, then connect my iPhone ot it, wirelessly, using Home Sharing (remotly). I have read that this can easily be set up if the iTunes library is on a Mac (Network Beacon and YazSoft ShareTool are two products I found). I can't find anyone who has had success on a Windows machine, though. In my thinking, there are a few options to getting this done. Find a utility that takes care of this for me (like the Mac-only options listed above) and is compatible with iPhone (Hamachi is NOT compatible with iPhone VPN). Manually configure a VPN to allow Bonjour multicast (I'm not sure what this really is...) Emulate a Mac on my Windows PC. FYI my router is a Linksys WRT54GL running Tomato 1.28 Note question is related to this

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• What apps are available for smartphone platforms to allow free calling to the UK and other countries? [closed]

  - by Andrew Ferrier

  On the iPhone, I use MagicJack to get completely free calls over WiFi to US numbers. I'm looking for a similar app to enable me to call UK numbers for free on the iPhone. Does anyone know of one? To make this question of broader applicability to everyone, what apps also allow free calling to other countries? Any smartphone platform (iPhone, Android, Blackberry, Windows Phone) could be useful. Note: I'm talking only about apps that allow completely free calling - the Apple app stores at least are full of apps that allow "cheap" calling. Suspicious apps that require credit card numbers upfront, etc., aren't as interesting.

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• webgame engine how does it works

  - by TWCrap

  Hy all, first off all, don't yell that i shouldn't start with it, i just want to know how that works... The thing is, how does the engine of an webgame works. A game like tribalwars, grepolis and forge of empires. How does that keeping alive work. I mean, a user is building an building, and quit the browser... The building is build even when the session of the user is expired. but the points of the user is updated when the building is finished... So how does that works. What do you guys think? do they have some kind of cronjob that is fired every second, and that walks throug the database, and search for finished buildings, and update's the stuff? or do you guys think that they do it difrent?!? I hope that i was clear. -NOTE- i don't need anny code, i'm just intrested in the progress behind the game... Greetingz Marc

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• 'Singleton' application - or let the user only launch one instance of a program at the time

  - by Disco

  I'm running a few linux desktops; mainly for kids (yeah, trying to teach them the right OS at early stage) (running Ubuntu 10.10, Gnome) The problem is that they found very funny to make their workstations (actually, old 512 Mb pentium 4) by launching thousands of firefox instances. I'm looking for a way to restrict them to launch 'N' instances of a particular application. Haven't figured yet how. Thought of a monitoring daemon but I think that would be too ressources hungry. Any idea of a script/trick to achieve this ? Note: i might have 1-2 level of users (the kids, and the more grown up kids) so i have also to limit per user; something like user1: 3firefox, user2: 2firefox instances.

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• Ubuntu 12.10 sources.list empty after install

  - by Martin Nielsen

  I recently installed the Ubuntu 12.10 server version from a USB stick. The step "Install additional software" or whatever keeps failing, so i though screw it and continued. Everything else worked like a charm. I thought. Turns out, the only two entries in my sources.list are the install CD. This means that i have no way of getting a.. well.. anything installed. Can someone give me a short list of repositories that i need so i can put them in the file? And on a similar note: What is the comment character for the sources list? #?

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