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  • What does intermittent "Input/output error" suggest?

    - by dan
    Lately my Ubuntu 12 system has started acting very strange. Sometimes the computer freezes and then unfreezes 2 minutes later, and other times when I try a basic command like less I get the error bash: /usr/bin/less: Input/output error. But this is intermittent too. Any suggestions? Also if I try sudo reboot and enter my password, I get sudo: unable to open /var/lib/sudo/plato/7: Read-only file system Before I used to be able to do sudo reboot fine. If I tail /var/log/syslog I do see these curious lines: .... ata1: softreset failed (device not ready) .... ata1: hard resettting link .... ata1: link is slow to respond, please be patient (ready=0) What can I do to fix this?

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  • Reasons for either 32-bit or 64-bit as development machine

    - by vartec
    I'm about to make a new Linux install, which will be primarily used for programming. I've seen benchmarks showing speed improvement of 64-bit version, however, I have hard time of telling how much these benchmarks translate to improvement in every day usage. And of course there are other aspects to consider. Usage I have in mind: mainly programming Python, with occasional C, C++ and Java; IDEs, which are using Java platforms (Eclipse and IntelliJ); on very rare occasions having to compile for 32-bit platform; not planning to have more than 64GB of RAM anytime soon (and I don't mind using PAE kernels); machine in question has 4GB RAM and Athlon II X2; What are pros and cons of choosing either i386 or x86_64 distro?

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  • Visual Studio 2010 Productivity Tips and Tricks&ndash;Part 1: Extensions

    - by ToStringTheory
    I don’t know about you, but when it comes to development, I prefer my environment to be as free of clutter as possible.  It may surprise you to know that I have tried ReSharper, and did not like it, for the reason that I stated above.  In my opinion, it had too much clutter.  Don’t get me wrong, there were a couple of features that I did like about it (inversion of if blocks, code feedback), but for the most part, I actually felt that it was slowing me down. Introduction Another large factor besides intrusiveness/speed in my choice to dislike ReSharper would probably be that I have become comfortable with my current setup and extensions.  I believe I have a good collection, and am quite happy with what I can accomplish in a short amount of time.  I figured that I would share some of my tips/findings regarding Visual Studio productivity here, and see what you had to say. The first section of things that I would like to cover, are Visual Studio Extensions.  In case you have been living under a rock for the past several years, Extensions are available under the Tools menu in Visual Studio: The extension manager enables integrated access to the Microsoft Visual Studio Gallery online with access to a few thousand different extensions.  I have tried many extensions, but for reasons of lack reliability, usability, or features, have uninstalled almost all of them.  However, I have come across several that I find I can not do without anymore: NuGet Package Manager (Microsoft) Perspectives (Adam Driscoll) Productivity Power Tools (Microsoft) Web Essentials (Mads Kristensen) Extensions NuGet Package Manager To be honest, I debated on whether or not to put this in here.  Most people seem to have it, however, there was a time when I didn’t, and was always confused when blogs/posts would say to right click and “Add Package Reference…” which with one of the latest updates is now “Manage NuGet Packages”.  So, if you haven’t downloaded the NuGet Package Manager yet, or don’t know what it is, I would highly suggest downloading it now! Features Simply put, the NuGet Package Manager gives you a GUI and command line to access different libraries that have been uploaded to NuGet. Some of its features include: Ability to search NuGet for packages via the GUI, with information in the detail bar on the right. Quick access to see what packages are in a solution, and what packages have updates available, with easy 1-click updating. If you download a package that requires references to work on other NuGet packages, they will be downloaded and referenced automatically. Productivity Tip If you use any type of source control in Visual Studio as well as using NuGet packages, be sure to right-click on the solution and click "Enable NuGet Package Restore". What this does is add a NuGet package to the solution so that it will be checked in along side your solution, as well as automatically grab packages from NuGet on build if needed. This is an extremely simple system to use to manage your package references, instead of having to manually go into TFS and add the Packages folder. Perspectives I can't stand developing with just one monitor. Especially if it comes to debugging. The great thing about Visual Studio 2010, is that all of the panels and windows are floatable, and can dock to other screens. The only bad thing is, I don't use the same toolset with everything that I am doing. By this, I mean that I don't use all of the same windows for debugging a web application, as I do for coding a WPF application. Only thing is, Visual Studio doesn't save the screen positions for all of the undocked windows. So, I got curious one day and decided to check and see if there was an extension to help out. This is where I found Perspectives. Features Perspectives gives you the ability to configure window positions across any or your monitors, and then to save the positions in a profile. Perspectives offers a Panel to manage different presets/favorites, and a toolbar to add to the toolbars at the top of Visual Studio. Ability to 'Favorite' a profile to add it to the perspectives toolbar. Productivity Tip Take the time to setup profiles for each of your scenarios - debugging web/winforms/xaml, coding, maintenance, etc. Try to remember to use the profiles for a few days, and at the end of a week, you may find that your productivity was never better. Productivity Power Tools Ah, the Productivity Power Tools... Quite possibly one of my most used extensions, if not my most used. The tool pack gives you a variety of enhancements ranging from key shortcuts, interface tweaks, and completely new features to Visual Studio 2010. Features I don't want to bore you with all of the features here, so here are my favorite: Quick Find - Unobtrusive search box in upper-right corner of the code window. Great for searching in general, especially in a file. Solution Navigator - The 'Solution Explorer' on steroids. Easy to search for files, see defined members/properties/methods in files, and my favorite feature is the 'set as root' option. Updated 'Add Reference...' Dialog - This is probably my favorite enhancement period... The 'Add Reference...' dialog redone in a manner that resembles the Extension/Package managers. I especially love the ability to search through all of the references. "Ctrl - Click" for Definition - I am still getting used to this as I usually try to use my keyboard for everything, but I love the ability to hold Ctrl and turn property/methods/variables into hyperlinks, that you click on to see their definitions. Great for travelling down a rabbit hole in an application to research problems. While there are other commands/utilities, I find these to be the ones that I lean on the most for the usefulness. Web Essentials If you have do any type of web development in ASP .Net, ASP .Net MVC, even HTML, I highly suggest grabbing the Web Essentials right NOW! This extension alone is great for productivity in web development, and greatly decreases my development time on new features. Features Some of its best features include: CSS Previews - I say 'previews' because of the multiple kinds of previews in CSS that you get font-family, color, background/background-image previews. This is great for just tweaking UI slightly in different ways and seeing how they look in the CSS window at a glance. Live Preview - One word - awesome! This goes well with my multi-monitor setup. I put the site on one monitor in a Live Preview panel, and then as I make changes to CSS/cshtml/aspx/html, the preview window will update with each save/build automatically. For CSS, you can even turn on live-update, so as you are tweaking CSS, the style changes in real time. Great for tweaking colors or font-sizes. Outlining - Small, but I like to be able to collapse regions/declarations that are in the way of new work, or are just distracting. Commenting Shortcuts - I don't know why it wasn't included by default, but it is nice to have the key shortcuts for commenting working in the CSS editor as well. Productivity Tip When working on a site, hit CTRL-ALT-ENTER to launch the Live Preview window. Dock it to another monitor. When you make changes to the document/css, just save and glance at the other monitor. No need to alt tab, then alt tab before continuing editing. Conclusion These extensions are only the most useful and least intrusive - ones that I use every day. The great thing about Visual Studio 2010 is the extensibility options that it gives developers to utilize. Have an extension that you use that isn't intrusive, but isn't listed here? Please, feel free to comment. I love trying new things, and am always looking for new additions to my toolset of the most useful. Finally, please keep an eye out for Part 2 on key shortcuts in Visual Studio. Also, if you are visiting my site (http://tostringtheory.com || http://geekswithblogs.net/tostringtheory) from an actual browser and not a feed, please let me know what you think of the new styling!

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  • What is the relationship between the business logic layer and the data access layer?

    - by Matt Fenwick
    I'm working on an MVC-ish app (I'm not very experienced with MVC, hence the "-ish"). My model and data access layer are hard to test because they're very tightly coupled, so I'm trying to uncouple them. What is the nature of the relationship between them? Should just the model know about the DAL? Should just the DAL know about the model? Or should both the model and the DAL be listeners of the other? In my specific case, it's: a web application the model is client-side (javascript) the data is accessed from the back-end using Ajax persistence/back-end is currently PHP/MySQL, but may have to switch to Python/GoogleDataStore on the GAE

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  • Lenovo Y460 Shutdown/Reboot/Logoff doesn't work

    - by ultimatebuster
    This is a part of the massive dump of problems I'm encountering with my Lenovo Y460 and Ubuntu. Problem: Cannot shutdown/reboot/logoff. Logoff issue: http://ubuntuforums.org/showthread.php?t=1791439 Shutdown and Reboot often freezes without doing anything. Currently can only use hard reset. Maybe related to the tricks I did to work around the ATI/Intel issue. See: Lenovo Y460 ATI PowerXpress issue I'm not sure where I can find the shutdown/reboot logs. If you tell me I'll be happy to provide them. Not sure what to do as of right now other than never shutdown/reboot or logoff

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  • What is Object Oriented Programming ill-suited for?

    - by LeguRi
    In Martin Fowler's book Refactoring, Fowler speaks of how when developers learn something new, they don't consider when it's inappropriate for the job: Ten years ago it was like that with objects. If someone asked me when not to use objects, it was hard to answer. [...] It was just that I didn't know what those limitations were, although I knew what the benefits were. Reading this, it occurred to me I don't know what the limitations or potential disadvantages of Object-Oriented Programming are. What are the limitations of Object Oriented Programming? When should one look at a project and think "OOP is not best suited for this"?

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  • Server overhead caused by bots?

    - by giuseppe
    I have one customer website causing overhead (http://www.modacalcio.it/en/by-kind/football-boots.html). With htop opened, I am trying navigate the website and the much load of the website is done by the ajax link being placed on the left side of the website. The website is hosted by a VPS with 3 proc and 2GB RAM, with enough hard with disk space. The real problem is that this website is new and not visited much. From the http-status module I am seeing that the overhead is caused by bots (Google bots, Bing bots, hrefs checker and so on). So I thought that's probably due to those spiders trying to crawl all those links at once - could this be causing this overhead? I have also put rel="nofollow" in those links, but this doesn't keep the bots away. Is there any way through code or Plesk to disable those links to those bots?

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  • Getting out of my head

    - by BenCole
    (I put this on SO, but it got a couple close votes saying it belonged here instead...) I've spent the last year as a single person team developing a rich-client application (35,000+ LoC, for what it's worth). It's currently stable and in production. However, I know that my skills were rusty at the beginning of the project, so without a doubt there are major issues to the code. At this point, most of the issues are in architecture, structure, or interactions - the easy problems, even architecture/design problems, have already been weeded out. Unfortunately, I've spent so much time with this project that I'm having a hard time thinking outside of it - approaching it from a new perspective to see the flaws deeply buried or inherent in the design. How do I step outside my head and outside my code so I can get a fresh look at this code so I can make it better? Is this less of an issue than I think it is, or is this a problem for other people as well?

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  • Panel Background color, Transparency and background image don't work with Ambiance theme

    - by Ash G
    As the title suggests. Selecting a background image, color or using the transparency sitting doesn't work with the Ambiance theme. Sections of the panel will take the new settings, but many of the applets including the clock, Indicator Applet Session, Indicator Applet, Rhythmbox icon, Tomboy Icon, Separators and various others retain the Ambiance theme background. This carries over through restart. Also you cannot resize the panel in Ambiance above 24 pixels as the background image doesn't scale. Am I doing something wrong, is it a bug or is it meant to be like that? I really like Ambiance, but am having a hard time using it because of these issues Edit: It seems these issues carry over to Radiance and New Wave as well

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  • not booting from usb or cd

    - by Raymond
    I am trying to install linux on my laptop, a Toshiba Satellite C6550-S5200. I did it once but something happened so I removed it then I had to destroy all data on hard drive so now I have nothing on it. Well I got a iso file burned to a CD and to a flash drive. With the flash drive I get. SYSLINUX 4.06 EDD 4.06-pre7 Copyright (C) 1994-2012 H. Peter Anvin et al With the CD it will start booting it but somewhere loading it up, the dots turn all orange and stay that way and my CD drive turns quiet. Oh and some more info the images work because I tried loading them up on another pc and it worked just fine.

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  • Trying to install ubuntu netbook 10.10 but it hangs on the "who are you" screen

    - by Jonathan
    I have an acer aspire one ZG8 netbook, and I have wanted to put ubuntu on it for some time. But it won't install. It has wiped windows from my hard drive already, so I cant go back to the horrible 7 starter edition that came with this netbook. Would really love a way to fix this, but right now I am using the the "Try ubuntu" aspect just so I have use of the Internet. No idea if I will be able to download an older version and try again from here or what to do... Any help would be great.

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  • How to create a shared folder using command line on a server

    - by sadmicrowave
    After following the tutorial here I ran into a problem. Here is what I did. On my server I installed nfs-kernel-server and edited the /etc/exports file to include the folder I want to share: /var *(rw,sync) On my client machine I edited my fstab file to include share: //128.251.xxx.xxx/var/ ~/uslonsweb003 nfs #username=[username],password=[password], 0 0 Entered command: sudo mount -a which gives this error: mount.nfs: remote share not in 'host:dir' format Where did I go wrong with this setup? Also if there is a better way (using command line) to setup a folder share on an Ubuntu 10.10 server that will be accessed by other linux and windows machines please let me know. UPDATE: The mapped drive is now not letting me create,edit,delete files or folders (readonly access) my configuration is as follows: client fstab file: 128.251.xxx.xxx:/var /home/coreyf/uslonsweb003 nfs rw,hard,intr, 0 0 server exports file: /var *(rw,no_root_squash,sync,no_subtree_check) UPDATE 2: Using Allans solution my drive mounted correctly however after putting rw,intr as my additional parameters I cannot create, edit and delete folders/files.

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  • How can I find files quicker than find or locate?

    - by Chaitanya
    I have been using find command to find files on my 1 tb hard disk. it takes very long. then I used locate which proved to be faster with regular update using updatedb. But the limitation of locate is that I cannot find files with certain size or modified/created time. can you suggest me any ideas on how to find files at more speed or in that case how to pipe output of locate command in a way that all other information like size, time, etc. can be displayed or redirected to a file.

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  • Are there any downsides of 2 developers getting married ?

    - by simpson
    I remember that in my first year at college, the professor told us that his wife is also a software developer, and a few decades ago when there has been a tough period of 2-3 years in the software field they both had been unemployed and had experienced some hard times. Of course I am not asking about this economic downside, as it is a general conclusion for a family working in the same field, and is not related specifically to programming. I am asking about any other possible downsides of a family where both people are programmers. To all developers married to developers - I am not asking if it is "horrible" or something like that, of course it's not, just if there are any specific issues (all kinds of relationships has some specific issues, and at the same time are immune to others). And yes, I am asking about a male developer married to a female developer, I am clarifying to avoid jokes like "I believe that 2 developers can get married in some states" and so on :)

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  • Good Literature for "Object oriented programming in C"

    - by Dipan Mehta
    This is not a debate question about whether or not C is a good candidate for Object oriented programming or not. Quite often C is the primary platform where the development is happening. I have seen, and hopefully learnt through crawling many open source and commercial projects - that while the language inherently doesn't stop you if you create "non-object" code. However, you can still think in the "Object" way and reasonably write code that captures this designs thinking. For those who has done this, OO way is still the best way to write code even when you are programming in C. While, I have learnt most of it through the hard way, are there any deep literature that can help educate the relatively young guys about how to do OO programming in C?

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  • Cannot mount one usb disc, although other mounts automatically after 12.10 upgrade

    - by Allen Williams
    Since upgrading to 12.10, switching on or attempting to mount one of my usb hard drives gives this error message: Error mounting system-managed device /dev/sdg1: Command-line `mount "/mnt/usb-ST350041_8AS_60CAFFFFFFFF-0:0-part1"' exited with non-zero exit status 32: mount: wrong fs type, bad option, bad superblock on /dev/sdg1, missing codepage or helper program, or other error In some cases useful info is found in syslog - try dmesg | tail or so dmesg | tail gives (inter alia): [ 1080.727830] sdg: sdg1 [ 1080.732003] sd 8:0:0:0: [sdg] Attached SCSI disk [ 1081.383633] FAT-fs (sdg1): Unrecognized mount option "x-gvfs-show" or missing value [ 1871.160973] sdg: sdg1 The drive cannot be mounted, but is recognized by the system as a "place". I am not a technical bod; I cannot take this further myself and any help would be much appreciated.

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  • Add Reference with Search

    - by Daniel Cazzulino
    If you have been using VS2010 for any significant amount of time, you surely came across the awkward, slow and hard to use Add Reference dialog. Despite some (apparent) improvements over the VS2008 behavior, in its current form it's even LESS usable than before. A brief non-exhaustive summary of the typical grief with this dialog is: Scrolling a list of *hundreds* of entries? (300+ typically) No partial matching when typing: yes, you can type in the list to get to the desired entry, but the matching is performed in an exact manner, from the beginning of the assembly name. So, to get to the (say) "Microsoft.VisualStudio.Settings" assembly, you actually have to type the first two segments in their entirety before starting to type "Settings"....Read full article

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  • How can I avoid the random restart of the xserver?

    - by Bernd
    I'm using a desktop pc with 64bit Ubuntu 12.04 (Kernel 3.2.0-24-generic). Hardware specs are - Intel Core i7 CPU 860 @ 2,80GHz x 8 - Nvidia GeForce GTS 250 - 750 GB Hard Disk ATA WDC WD7501AALS-00E3A0 (for my /home partition) - 128 GB Solid-State Disk ATA PLEXTOR PX-128M2S (for all other partitions) Since I reinstalled the PC with Ubuntu 12.04 the xserver restarts randomly. Most times when I watch a video in the browser (maybe a flash issue?) but sometimes the restart/crash appears when I'm working in an text-editor. How can I locate the problem? Which information is needed for a useful answer?

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  • .NET Performance Counters

    Recently while catching up on technical reading I ran across the subject of performance counters. I must admit that I had not looked closely at this subject in the past and thought it was time to do so. If you are not sure what performance counters are and what they provide simply put they have [...] Related posts:Microsoft set to deprecate OracleClient in the .NET 4.0 Framework How To Create a Virtual Hard Disk (VHD) in Windows 7 Microsoft Certifications ...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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  • Use Your PC to Keep Yourself Entertained While Traveling for the Holidays

    - by Justin Garrison
    Staying connected may be hard no matter what network you are on, and in flight Wi-Fi isn’t pervasive enough to count on. Here are tips and tricks to keep yourself entertained when unplugged and traveling. Image Via MarinaAvila Latest Features How-To Geek ETC How to Use the Avira Rescue CD to Clean Your Infected PC The Complete List of iPad Tips, Tricks, and Tutorials Is Your Desktop Printer More Expensive Than Printing Services? 20 OS X Keyboard Shortcuts You Might Not Know HTG Explains: Which Linux File System Should You Choose? HTG Explains: Why Does Photo Paper Improve Print Quality? Ubuntu Font Family Now Available for Download Oh No! WikiLeaks Published Santa Claus’s Naughty List [Video] Remember the Milk Now Supports HTTPS Encryption for the Entire Session MTCrypt Is an Efficient Front End for Mounting TrueCrypt Volumes 10 Things You Should Do with Your New Android Phone Walking Through the Park on a Snowy Night Wallpaper

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  • Turn based battle and formula

    - by Mark Chapman
    I'm building a game called DVP(Digimon Virtual Pet), and in this game other than taking care of your digimon, You can also battle and breed them. I'm working on the battle system (making it first cause the actual pet system will be easy compared to the netplay, or 39DLL)but here is the problem I don't want it to be "too" simple or "too" complicated, but I do want to go by a certain formula. There are str, def, spd, and int. Strength: How hard the attacking digimon is hitting Defense: How much damage your digimon can defend when being attacked Speed: The chance of you missing the enemy Intelligence (battle knowledge): The chance of you hitting a critical hit or defending a critical hit. I can make a super simple turn based example, but I don't know how exactly to make the formulas for what I've explained above, any help?

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  • How to deal with or survive with the information overload

    - by Name
    I will better explain my question. I have been struggling with this for long time Everytime i want to read something for e,g book on java , then i find so much stuff like many tutorials , many ebooks that i am not able to decide which one to choose. I spend some time reading one , then 2 and so on and in the end i leave and gain nothing. I like the old days when we had only few resources like one hard book and at least i finish that from start to finish and gained much but now days there is so much information that mind jumps from one source to other and gain nothing what should i do

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  • Using usbdrive as ram in ubuntu

    - by tachyons
    In windows it is possible to use usb flash drive as a virtual ram. I wonder if it is possible to do so in ubuntu? If it is, how could one do it? [Edit]: I mean Ready boost equivallent for ubuntu. I know that it is not a perfect replacement for ram and it is not advisable for longterm use. Is creating swap file in a usb flash drive similar to it? Will it demonstrate performance gains over a swap file in a Hard Disk Drive?

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  • SharpDOM, view engine for ASP.NET MVC

    Hi everyone! There is a new view engine for ASP.NET MVC platform, SharpDOM, http://sharpdom.codeplex.com. It's targeting hard coders who appreciate code-first approach a lot. This view engine combines pure HTML layout and the view logic in rather consistent manner, so that HTML layout still looks like HTML layout but it is C# code now :-) If you are interested, please, navigate to SharpDOM project on CodePlex site for more details - http://sharpdom.codeplex.com. Thanks!...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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  • Wired internet speed is slow in Ubuntu 12.04

    - by RameshKatkam
    I have dual boot Windows 7 and Ubuntu 12.04 on my Dell N4110 laptop. I recently installed Ubuntu 12.04 on my existing windows 7 hard drive. I am experiencing very slow internet speed on Ubuntu(wired connection). But on Windows,internet is really fast. I disabled ipv6 by editing /etc/sysctl.conf No avail. Then i run the following command. sudo ethtool -s eth0 speed 100 duplex full autoneg off No benefit. I am having "Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller [10ec:8136] (rev 05)" network card.

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