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• Moving from a static site to a CMS with new URLs and meta-data for pages

  - by Chris J

  Hi I am in the process of rebuilding a site from static pages to a CMS which will be using mod_rewrite to generate new page URLs. In this process our marketing people and myself have decided to tidy up the descriptions, keywords and titles. Eg: a page which who's URL is currently "website-name/about_us.html" and has a title of "website-name - something not quite page specific" will change to "website-name/about-us/" and title: "about us - website-name" and may have a few keywords and the description changed. Our goal with updating the meta data is to improve our page rankings and try to keep in line with some best practices for SEO. Though our current page rankings are quite good in many aspects, there is room for improvement. All of the pages will also have content changes (like rearranging heading tags, new menu on all pages, new content in footer, extra pieces of dynamic content relating to other pages). In this new site process I plan to use 301 redirects for all the old URLs pointing to the new URLs. My question is what can I expect to happen to the page rankings in Google, in the sort term and long term? Will this be like kicking off a new site which will have to build up trust over time or will the original page rankings have affect?

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• Dependencies not met on 12.04?

  - by Mochan

  Now I'm very aware that there are many questions out there that are quite similar to what I'm experiencing, but I have looked through many and I have not found a suitable answer. You are welcome to suggest questions that are similar, but I doubt that it will help. Getting on to the issue at hand, whenever I do anything that involves installation, whether it be codecs for videos, new programs or whatever the latter, I always get the 'Dependencies not met' error. In addition, I also get this notification in the panel: When clicked, the menu says this: "An error occurred. Please run Package Manager from the right-click menu or run apt-get in a terminal to see what is wrong. The error message was: ' Error: Broken Count 0'. This usually means your installed packages have unmet dependencies." It gives me three items to click: Show Updates Install all updates Check for Updates And then finally: Show Notifications (with a tick) Preferences When I try 'Install all Updates' (also Check Updates Install) it says this: and also this: As well as 'Ubuntu has experienced an internal error' and 'Did this error occur when moving from one version of Ubuntu to another?' (I clicked NO, because it didn't). So I took it's advice and ran sudo apt-get install -f This is what results: Reading package lists... Done Building dependency tree Reading state information... Done Correcting dependencies... Done The following extra packages will be installed: libapt-pkg4.12:i386 The following packages will be upgraded: libapt-pkg4.12:i386 1 upgraded, 0 newly installed, 0 to remove and 87 not upgraded. 1 not fully installed or removed. Need to get 0 B/941 kB of archives. After this operation, 0 B of additional disk space will be used. Do you want to continue [Y/n]? Y E: Internal Error, No file name for libapt-pkg4.12 When running sudo apt-get update it's all fine, but running sudo apt-get install -f still results in the same thing. I really have no idea what to do... can anyone help me?

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• Displaying a Grid of Data in ASP.NET MVC

  One of the most common tasks we face as a web developers is displaying data in a grid. In its simplest incarnation, a grid merely displays information about a set of records - the orders placed by a particular customer, perhaps; however, most grids offer features like sorting, paging, and filtering to present the data in a more useful and readable manner. In ASP.NET WebForms the GridView control offers a quick and easy way to display a set of records in a grid, and offers features like sorting, paging, editing, and deleting with just a little extra work. On page load, the GridView automatically renders as an HTML <table> element, freeing you from having to write any markup and letting you focus instead on retrieving and binding the data to display to the GridView. In an ASP.NET MVC application, however, developers are on the hook for generating the markup rendered by each view. This task can be a bit daunting for developers new to ASP.NET MVC, especially those who have a background in WebForms. This is the first in a series of articles that explore how to display grids in an ASP.NET MVC application. This installment starts with a walk through of creating the ASP.NET MVC application and data access code used throughout this series. Next, it shows how to display a set of records in a simple grid. Future installments examine how to create richer grids that include sorting, paging, filtering, and client-side enhancements. We'll also look at pre-built grid solutions, like the Grid component in the MvcContrib project and JavaScript-based grids like jqGrid. But first things first - let's create an ASP.NET MVC application and see how to display database records in a web page. Read on to learn more! Read More >

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• What are all the components of a "Facebook App"?

  - by pnongrata

  I am a developer who has never personally partaken in social media (in any form) for reasons completely outside the scope of this question. I am "off the grid" (no Facebook, Twitter, etc accounts). I'm currently building a web app and would like the app to have a presence on Facebook, and possibly even "port" my app over as a Facebook app. My understanding of Facebook Apps is that they're just normal web apps that get <iframe>d into a Facebook page. The app is actually hosted on your server (not FB's servers). But this got me thinking: Don't Facebook Apps have "profile pages"? Is there anything developers can do to customize the behavior of their own profile pages? Do apps have the ability to do things like MySpace themes used to do (i.e., customize and interact with User profile pages, Groups, etc.)? Do Facebook Apps gain any sort of extra capabilities (inside of Facebook) that a normal web app would not have? It seems to me like if all a Facebook App is, is an iframed-web app, that it would still need to communicate with Facebook via its many APIs, just like a normal app would have to, right? If it's not possible to write an app that can customize the UI or behavior of user profiles and other pages, then how do games like "Farmville" interact with User profiles so that you see updates to profiles like "John Smith reached level 2 of Farmville"? Basically, I'm asking any battle-worn Facebook app developers if my understanding of Facebook Apps is correct, or if I'm missing anything big here. It's my understanding that for security reasons (obviously) Facebook doesn't allow apps to customize anything outside of the iframe it lives in. So if I want my app to appear like it's "interacting" with its Facebook users, it looks like I just need to publish stuff to the users' news feeds to try and encourage people to use my app (please correct me if I'm wrong here!). Thanks in advance for any corrections, clarifications, advice or suggestions!

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• Sandcastle Help File Builder - October 2010 release

  - by TATWORTH

  At http://shfb.codeplex.com/releases/view/92191, the latest Sandcastle has been released. I am pleased to say that it incorporates the generic version of a fix, I originated that allows projects including Crystal Reports to be documented.Here is the relevant passage from the help file:"The default configuration for MRefBuilder has been updated to ignore the Crystal Reports licensing assembly (BusinessObjects.Licensing.KeycodeDecoder) if it fails to get resolved. This assembly does not appear to be available and ignoring it prevents projects that include Crystal Reports assemblies from failing and being unbuildable."There are many other fixes. Here are the release notes:IMPORTANT: On some systems, the content of the ZIP file is blocked and the installer may fail to run. Before extracting it, right click on the ZIP file, select Properties, and click on the Unblock button if it is present in the lower right corner of the General tab in the properties dialog.This release supports the Sandcastle October 2012 Release (v2.7.1.0). It includes full support for generating, installing, and removing MS Help Viewer files. This new release supports Visual Studio 2010 and 2012 solutions and projects as documentation sources, and adds support for projects targeting the .NET 4.5 Framework, .NET Portable Library 4.5, and .NET for Windows Store Apps.See the Sandcastle 2.7.1.0 Release Notes for details on all of the changes made to the underlying Sandcastle tools and presentation styles.This release uses the Sandcastle Guided Installation package. Download and extract to a folder and then runSandcastleInstaller.exe to run the guided installation of Sandcastle, the various extra items, the Sandcastle Help File Builder core components, and the Visual Studio extension package.What's IncludedHelp 1 compiler check and instructions on where to download it and how to install it if neededHelp 2 compiler check and instructions on where to download it and how to install it if neededSandcastle October 2012 2.7.1.0An option to install the MAML schemas in Visual Studio to provide IntelliSense for MAML topicsSandcastle Help File Builder 1.9.5.0SHFB Visual Studio Extension PackageFor more information about the Visual Studio extension package, see the Visual Studio Package help file topic.

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• Using visitor pattern with large object hierarchy

  - by T. Fabre

  Context I've been using with a hierarchy of objects (an expression tree) a "pseudo" visitor pattern (pseudo, as in it does not use double dispatch) : public interface MyInterface { void Accept(SomeClass operationClass); } public class MyImpl : MyInterface { public void Accept(SomeClass operationClass) { operationClass.DoSomething(); operationClass.DoSomethingElse(); // ... and so on ... } } This design was, however questionnable, pretty comfortable since the number of implementations of MyInterface is significant (~50 or more) and I didn't need to add extra operations. Each implementation is unique (it's a different expression or operator), and some are composites (ie, operator nodes that will contain other operator/leaf nodes). Traversal is currently performed by calling the Accept operation on the root node of the tree, which in turns calls Accept on each of its child nodes, which in turn... and so on... But the time has come where I need to add a new operation, such as pretty printing : public class MyImpl : MyInterface { // Property does not come from MyInterface public string SomeProperty { get; set; } public void Accept(SomeClass operationClass) { operationClass.DoSomething(); operationClass.DoSomethingElse(); // ... and so on ... } public void Accept(SomePrettyPrinter printer) { printer.PrettyPrint(this.SomeProperty); } } I basically see two options : Keep the same design, adding a new method for my operation to each derived class, at the expense of maintainibility (not an option, IMHO) Use the "true" Visitor pattern, at the expense of extensibility (not an option, as I expect to have more implementations coming along the way...), with about 50+ overloads of the Visit method, each one matching a specific implementation ? Question Would you recommand using the Visitor pattern ? Is there any other pattern that could help solve this issue ?

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• Latest update to Ubuntu 13.10 broke Intel graphics drivers

  - by James Davies

  I'm running a copy of Ubuntu 13.10 on an i7-4771 w/ Intel HD4600 Graphics using a Dell Ultrasharp 1440p monitor via Displayport. Up until today this configuration has been working perfectly, however the latest update appears to have broken my graphics configuration, and xorg is now refusing to go above 1280p resolution. Running xrandr it appears the driver incorrectly thinks my monitor is plugged into the HDMI port and is detecting a max resolution of 1920x1200 instead of 2560x1440. (It's actually plugged in via Displayport). Based on the apt history.log, the latest update was for the kernel. I'm presuming the issue is that the official Intel driver hasn't been updated to support this version? Is there any way to resolve this, or will I need to upgrade to 14.10 to get the latest driver from Intel? Start-Date: 2014-05-28 11:30:57 Commandline: aptdaemon role='role-commit-packages' sender=':1.473' Install: linux-image-extra-3.11.0-22-generic:amd64 (3.11.0-22.38), linux-image-3.11.0-22-generic:amd64 (3.11.0-22.38), linux-headers-3.11.0-22:amd64 (3.11.0-22.38), linux-headers-3.11.0-22-generic:amd64 (3.11.0-22.38)

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• Maintaining Two Separate Software Versions From the Same Codebase in Version Control

  - by Joseph

  Let's say that I am writing two different versions of the same software/program/app/script and storing them under version control. The first version is a free "Basic" version, while the second is a paid "Premium" version that takes the codebase of the free version and expands upon it with a few extra value-added features. Any new patches, fixes, or features need to find their way into both versions. I am currently considering using master and develop branches for the main codebase (free version) along side master-premium and develop-premium branches for the paid version. When a change is made to the free version and merged to the master branch (after thorough testing on develop of course), it gets copied over to the develop-premium branch via the cherry-pick command for more testing and then merged into master-premium. Is this the best workflow to handle this situation? Are there any potential problems, caveats, or pitfalls to be aware of? Is there a better branching strategy than what I have already come up with? Your feedback is highly appreciated! P.S. This is for a PHP script stored in Git, but the answers should apply to any language or VCS.

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• Why can't I run any Android NDK commands?

  - by TheBuzzSaw

  I had been running Mint 12 before, and everything was working there. I switched to Ubuntu 12.04, and now I am very frustrated. When I run ndk-build, I get /home/buzz/ndk/prebuilt/linux-x86/bin/make: not found So, I changed to that folder directly. When I type in ./make, I get bash: ./make: No such file or directory Typing ls clearly shows the file where I am! I did some hacking around (pointing to external tools) to get past each error (just to experiment), and I ran into this! /home/buzz/ndk/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86/bin/arm-linux-androideabi-gcc: Command not found Why? Why are all these files unable to be found? As I said above, this was all working just fine in another distro. What changed? What's extra frustrating is that if I push TAB to auto-complete, it works. So, the file is clearly there (and clearly marked with execution permissions). So, why can't it be found?

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• Dedicated server: managed hosting or manage it myself?

  - by ddawber

  We're currently hosting a number of sites on a self-managed dedicated server. Some companies, however, offer a managed dedicated server hosting service. They offer: Roughly the same server spec Ticketing system support Managed daily backups Virtual firewall (but with a limit of 10 IP addresses allowed through at any one time) Now, this managed hosting is at extra expense - somewhere in the region of $500 per month, and the limit on the number of IP addresses they'll manage on the firewall is also a real pain. My thinking is it would be better and cheaper to Stay with the same host since the dedicated box is fine Get an Amazon AWS account and use their server to manage backups; there are a number of good tools that can be used to automate the process Configure iptables so that I have complete control of the firewall I want to know Is a managed virtual firewall likely to be more secure than me configuring iptables? Whether, in your opinion, it's best to let someone else take care of backups? If, from your experience, there's anything else i'm missing that warrants using managed hosting over a DIY service? I think there is some reluctance to not having managed hosting since a managed host in effect takes responsibility for your server, whereas any hardware or security issues with a server that we manage would mean we are forced to hold our hands up when a client site goes down. That said, I personally don't think a managed host does that much in the day to day running of your server (backups are automatic, OS updates are carried out with ease, etc.).

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• How to uninstall Ubuntu 12.04 LTS dual booting with Windows 7?

  - by user103799

  I need to uninstall Ubuntu 12.04 LTS from my laptop. It's currently dual booting with windows 7. I've searched and found some ways to do this, but all use some kind of a CD to complete the deletion. I have neither the Ubuntu Live CD nor Windows Install CD/Recovery CD. This laptop did not come with one, and I unfortunately have no available storage device to make a recovery CD. Is there a way to completely uninstall Ubuntu 12.04 LTS dual booting without using any hardware? If there's no way, then how to uninstall using the least hardware possible? Or easy to find hardware? I've nothing against Ubuntu. I installed this as a backup/alternative to error-prone Windows 7. However, after a hardware upgrade, including extra RAMs and a new, better CPU, Windows 7 runs smoothly again. Now I'm running low on hard drive space and need the 40 gig or so of space I partitioned for Ubuntu back. Any help is appreciated, and thanks in advance!

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• Kubuntu apt-get -f install error

  - by ShaggyInjun

  I am seeing an error while running apt-get -f install. Can somebody help me out .. venkat@ubuntu:~/Downloads$ sudo apt-get -f install Reading package lists... Done Building dependency tree Reading state information... Done Correcting dependencies... Done The following extra packages will be installed: libjack-jackd2-0 Suggested packages: jackd2 The following packages will be upgraded: libjack-jackd2-0 1 upgraded, 0 newly installed, 0 to remove and 256 not upgraded. 109 not fully installed or removed. Need to get 0 B/197 kB of archives. After this operation, 3,072 B of additional disk space will be used. Do you want to continue [Y/n]? Y (Reading database ... 274641 files and directories currently installed.) Preparing to replace libjack-jackd2-0 1.9.8~dfsg.1-1ubuntu1 (using .../libjack-jackd2- 0_1.9.8~dfsg.2-1precise1_amd64.deb) ... Unpacking replacement libjack-jackd2-0 ... dpkg: error processing /var/cache/apt/archives/libjack-jackd2-0_1.9.8~dfsg.2- 1precise1_amd64.deb (--unpack): './usr/share/doc/libjack-jackd2-0/buildinfo.gz' is different from the same file on the system dpkg-deb: error: subprocess paste was killed by signal (Broken pipe) Errors were encountered while processing: /var/cache/apt/archives/libjack-jackd2-0_1.9.8~dfsg.2-1precise1_amd64.deb E: Sub-process /usr/bin/dpkg returned an error code (1)

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• Responsive Design: Which Framework Should I Use? CSS3 & HTML5

  - by Jayhal

  I've been looking for a suitable set of HTML5/CSS3 foundation files to start new projects on. I started off piecing together my own files, but I believe I might be better served in finding a solid and fairly compatible(with me) CSS3/HTML5 framework and then tweaking certain things that may not best suit my own process. I'd love to find something that is responsive and that includes aspects focusing on layout, type(hor and vert baselines), form and interface components, cross-browser issues, and preferably built on something other than a just imple css reset, but that does include rebuilding elements consistently across browsers for a clean work slate. Extra features like polyfills or others area great, as is good documentation and examples. So far, off the top of my head I know of, Skeleton 1140 Grid 320 & Up (plus BP) HTML5 Boilerplate 2.0 and Mobile Inuit.css Less Framework Fluir Perkins.Less A few WP themes Are there any great one I don't know about? I work a lot in WP, and something that is easily incorporated (but also stand alone) is ideal. Plugins and wide set feature while maintaining the ability to cut it down when needed(flexibility) is also a big plus, and in par with a faster learning, since I want to start using whatever I find immediately . What are some of the better options you guys might be able to recommend? Systems or scripts, plugins, and other related tools are also welcome, Thanks!

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• Software Center - Items cannot be installed or removed until package catalog is repaired"

  - by Stephanie

  I tried to install back in time and now I keep getting the message 'items cannot be installed or removed until package catalog is repaired. I have tried sudo apt-get install -f then get Reading package lists... Done Building dependency tree Reading state information... Done Correcting dependencies... Done The following extra packages will be installed: backintime-gnome The following packages will be upgraded: backintime-gnome 1 upgraded, 0 newly installed, 0 to remove and 2 not upgraded. 1 not fully installed or removed. Need to get 0 B/39.4 kB of archives. After this operation, 24.6 kB of additional disk space will be used. Do you want to continue [Y/n]? when I click Y, I get the following message dpkg: dependency problems prevent configuration of backintime-gnome: backintime-gnome depends on backintime-common (= 1.0.7); however: Version of backintime-common on system is 1.0.8-1. dpkg: error processing backintime-gnome (--configure): dependency problems - leaving unconfigured No apport report written because the error message indicates its a followup error from a previous failure. Errors were encountered while processing: backintime-gnome E: Sub-process /usr/bin/dpkg returned an error code (1) stephanie@stephanie-ThinkPad-T61:~$ sudo dpkg --configure -a dpkg: dependency problems prevent configuration of backintime-gnome: backintime-gnome depends on backintime-common (= 1.0.7); however: Version of backintime-common on system is 1.0.8-1. dpkg: error processing backintime-gnome (--configure): dependency problems - leaving unconfigured Errors were encountered while processing: backintime-gnome

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• Designing and refactoring of payment logic

  - by jokklan

  Im currently working on an application that helps users to coordinate dinner clubs and all related accounting. (A dinner club is where people in a group, take turns to cook for the rest and then you pay a small amount to participate. This is pretty normal in dorms and colleges where im from). However there is some different models that all have a price and the accounting aspect is therefore a little spread. We both have DinnerClub, ShoppingItem and are about to implement the third Payment when users pay their debts (or get refunded for expenses). Each of these have a "price" attribute and a users expense (that he or she needs refunded) is calculated by the total of these "prices" minus what other users have bought and he or she have used/participated in. My question is then if someone have some hints to refactor this bring all this behavior together in one place? For now have i thought about a Transaction class that are responsible for this behaviour, but I'm a little worried about the performance impact on having to query for another polymorphic record each time i want to show the price on dinner clubs and shopping items (i have a standard index page with a list for both so it's a lot of extra records being queried)...

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• webhost4life, please give me, my data back. My website will not work without the database.

  - by Shervin Shakibi

  I have about 4 or 5 accounts with WebHost4life.com, these are all my customers that based on my recommendation have been hosting with webhost4life.com. A few days ago for some reason they decided to migrate one of these accounts to a new server. They moved everything created a new database on the new server but the new database is empty. after spending hours with Tech support they acknowledged the problem and assured me it will take up to an hour or two and my database will be populated with the data. this was about 7 hours ago. Oh by the way I pay extra for the backup plan and yes you guessed it, none of my backups are there. Needless to say I’m very scared and disappointed. No one is responding to my emails  or phone calls. After searching the web, I found out, this has happened before, in some cases it took them days to fix the problem and many never got it resolved and switched hosting companies, I would love to do that but I need my 2 GB database before I start shopping around for a new hosting company. Stay away from Webhost4life.

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• How to customize web-app (pages and UI) for different customers

  - by demoncodemonkey

  We have an ASP.NET web-application which has become difficult to maintain, and I'm looking for ideas on how to redesign it. It's an employee administration system which can be highly customized for each of our customers. Let me explain how it works now: On the default page we have a menu where a user can select a task, such as Create Employee or View Timesheet. I'll use Create Employee as an example. When a user selects Create Employee from the menu, an ASPX page is loaded which contains a dynamically loaded usercontrol for the selected menuitem, e.g. for Create Employee this would be AddEmployee.ascx If the user clicks Save on the control, it navigates to the default page. Some menuitems involve multiple steps, so if the user clicks Next on a multi-step flow then it will navigate to the next page in the flow, and so on until it reaches the final step, where clicking Save navigates to the default page. Some customers may require an extra step in the Create Employee flow (e.g. SecurityClearance.ascx) but others may not. Different customers may use the same ASCX usercontrol, so in the AddEmployee.OnInit we can customize the fields for that customer, i.e. making certain fields hidden or readonly or mandatory. The following things are customizable per customer: Menu items Steps in each flow (ascx control names) Hidden fields in each ascx Mandatory fields in each ascx Rules relating to each ascx, which allows certain logic to be used in the code for that customer The customizations are held in a huge XML file per customer, which could be 7500 lines long. Is there any framework or rules-engine that we could use to customize our application in this way? How do other applications manage customizations per customer?

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• Why is the use of abstractions (such as LINQ) so taboo?

  - by Matthew Patrick Cashatt

  I am an independent contractor and, as such, I interview 3-4 times a year for new gigs. I am in the midst of that cycle now and got turned down for an opportunity even though I felt like the interview went well. The same thing has happened to me a couple of times this year. Now, I am not a perfect guy and I don't expect to be a good fit for every organization. That said, my batting average is lower than usual so I politely asked my last interviewer for some constructive feedback, and he delivered! The main thing, according to the interviewer, was that I seemed to lean too much towards the use of abstractions (such as LINQ) rather than towards lower-level, organically grown algorithms. On the surface, this makes sense--in fact, it made the other rejections make sense too because I blabbed about LINQ in those interviews as well and it didn't seem that the interviewers knew much about LINQ (even though they were .NET guys). So now I am left with this question: If we are supposed to be "standing on the shoulders of giants" and using abstractions that are available to us (like LINQ), then why do some folks consider it so taboo? Doesn't it make sense to pull code "off the shelf" if it accomplishes the same goals without extra cost? It would seem to me that LINQ, even if it is an abstraction, is simply an abstraction of all the same algorithms one would write to accomplish exactly the same end. Only a performance test could tell you if your custom approach was better, but if something like LINQ met the requirements, why bother writing your own classes in the first place? I don't mean to focus on LINQ here. I am sure that the JAVA world has something comparable, I just would like to know why some folks get so uncomfortable with the idea of using an abstraction that they themselves did not write. UPDATE As Euphoric pointed out, there isn't anything comparable to LINQ in the Java world. So, if you are developing on the .NET stack, why not always try and make use of it? Is it possible that people just don't fully understand what it does?

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• Views : ViewControllers, many to one, or one to one?

  - by conor

  I have developed an Android application where, typically, each view (layout.xml) displayed on the screen has it's own corresponding fragment (for the purpose of this question I may refer to this as a ViewController). These views and Fragments/ViewControllers are appropriately named to reflect what they display. So this has the effect of allowing the programmer to easily pinpoint the files associated with what they see on any given screen. The above refers to the one to one part of my question. Please note that with the above there are a few exceptions where very similar is displayed on two views so the ViewController is used for two views. (Using a simple switch (type) to determine what layout.xml file to load) On the flip side. I am currently working on the iOS version of the same app, which I didn't develop. It seems that they are adopting more of a one-to-many (ViewController:View) approach. There appears to be one ViewController that handles the display logic for many different types of views. In the ViewController are an assortment of boolean flags and arrays of data (to be displayed) that are used to determine what view to load and how to display it. This seems very cumbersome to me and coupled with no comments/ambiguous variable names I am finding it very difficult to implement changes into the project. What do you guys think of the two approaches? Which one would you prefer? I'm really considering putting in some extra time at work to refactor the iOS into a more 1:1 oriented approach. My reasoning for 1:1 over M:1 is that of modularity and legibility. After all, don't some people measure the quality of code based on how easy it is for another developer to pick up the reigns or how easy it is to pull a piece of code and use it somewhere else?

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• Not enough disk space '/' in AWS instance

  - by Sumant

  i am running Ubuntu 11.04 instance for my Web Server on AWS cloud, now i am getting there is no disk space in / partition of my server. df -ah say this Filesystem Size Used Avail Use% Mounted on /dev/xvda1 7.9G 7.8G 97M 99% / proc 0 0 0 - /proc none 0 0 0 - /sys fusectl 0 0 0 - /sys/fs/fuse/connections none 0 0 0 - /sys/kernel/debug none 0 0 0 - /sys/kernel/security none 3.7G 112K 3.7G 1% /dev none 0 0 0 - /dev/pts none 3.7G 0 3.7G 0% /dev/shm none 3.7G 80K 3.7G 1% /var/run none 3.7G 0 3.7G 0% /var/lock /dev/xvdb 414G 16G 377G 4% /mnt Now i have Tried these thing for getting some extra space on / partition Clean up All Log files for Apache. Removed all unnecessary files from server. Home directory Cleanup. But Still I am not getting enough space. This Instance type is m1.large with 8GB EBS. Now i am getting i have enough disk space in /dev/xvdb. Is there a way i can allocate some diskspace to / from /dev/xvdb or Any other Ways. Please suggest me the possible solution for this.Is it possible to use the same /dev/xvdb partition with another instance.

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• Tracking down memory issues affecting a website

  - by gaoshan88

  I've got a website (Wordpress based) that became unresponsive. I SSH'd into the server and saw that we were out of memory. Errors in my apache log files indicated the same... things failing to be allocated due to lack of memory). Restarting the server fixes it. So I look in access.log and error.log around the time of the incident but I see nothing strange. No extra traffic, no unusual requests. In fact the only request around the time of the problem was one from Googlebot for an rss feed... at that point I start to see 500 response codes in the logs until the machine was rebooted. I look in message.log hoping to see something but there is nothing at all for that entire day (which is odd as there are entries for every other day). The site has a large amount of memory allocated to it and normally runs using about 30% of what is available. My question... how would you go about trying to track this down at this point? What are some other log files I could check or strategies I could take?

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• How to optimize calls to multiple APIs at once and return as one set?

  - by Martin

  I have a web app that searches across 2 APIs right now. I have my own Restful web service that I call, and it does all the work on the backend to asynchronously call the 2 APIs and concatenate them into one result set for my web app to use. I want to scale this out and add as many other APIs as I can (currently looking at about 10 more). But as I add APIs, the call to my service gets (potentially) slower and more complex. How do I handle one API not responding ... and other issues that arise? What would be the best way to approach this? Should I create a service call for each API, that way each one is independent and not coupled to all the other calls? Is there a way on the backend to handle the multiple API calls without all the extra complexity it adds? If I go the route of a service call per API, now my client code gets more complex (and I have a lot of clients)? And it's more work for the client, and since I have mobile apps, it will cost the client more data usage. If I go one service call, is there a way to set up some sort of connection so I can return data as I get it, in case one service call hangs?

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• The clock problem - to if or not to if?

  - by trejder

  Let's say, we have a simple digital clock. To "power" it, we use a routine executed every second. We update seconds part in it. But, what about minutes and hours part? What is better / more professional / offers better performance: Ignore all checking and update hour, minute and seconds part each time, every second. Use if + a variable for checking, if 60 (or 3600) seconds passed and update minute / hour part only at that precise moments. This leads us to a question, what is better -- unnecessary drawings (first approach) or extra ifs? I've just spotted a Javascript digital clock, one of millions similar on one of billions pages. And I noticed that all three parts (hours, minutes and seconds) are updated every second, though first changes its value only once per 3600 seconds and second once per 60 seconds. I'm not to experienced developer, so I might me wrong. But everything, what I've learnt up until now, tells me, that if are far better then executing drawing / refreshing sequences only to draw the same content.

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• How to indicate to a web server the language of a resource

  - by Nik M

  I'm writing an HTTP API to a publishing server, and I want resources with representations in multiple languages. A user whose client GETs a resource which has Korean, Japanese and Trad. Chinese representations, and sends Accept-Language: en, ja;q=0.7 should get the Japanese. One resource, identified by one URI, will therefore have a number of different language representations. This seems to me like a totally orthodox use of content negotiation and multiple resource representations. But when each translator comes to provide these alternate language representations to the server, what's the correct way to instruct the server which language to store the representation under? I'm having the translators PUT the representation in its entirety to the same URI, but I can't find out how to do this elegantly. Content-Language is a response header, and none of the request headers seem to fit the bill. It seems my options are Invent a new request header Supply additional metadata in a multipart/related document Provide language as a parameter to the Content-Type of the request, like Content-Type: text/html;language=en I don't want to get into the business of extending HTTP, and I don't feel great about bundling extra metadata into the representation. Neither approach seems friendly to HTTP caches either. So option 3 seems like the best way that I can think of, but even then it's decidedly non-standard to put my own specific parameters on a very well established content type. Is there any by-the-book way of achieving this?

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• Forking a GPL dual licensed software with business owned copyrights

  - by Eric

  After receiving some threats of the copyrights holder of a dual licensed software(GPL2 and commercial) to buy the commercial version for projects in production, I am thinking to make a fork. In a case of GPL2 and commercially dual licensed with business owned copyrights software, is forking the GPL2 version an option? Also, is forking a good way to deal with such cases? Background information The software is a web CMS released under 2 versions a GPL2 free open source edition and a commercial edition including technical support and extra functionality. The problem is that now, basing their argumentation on the "distribution" definition of the GPL2, the company holding the copyrights argue that delivering the software and some extensions to a client is considered as a "distribution". And that such a "distribution" falls under the GPL2 obligation to release the custom made extension code. Custom made extensions are mainly designs, templates and very specific functionality. Basically they give me 3 choices: Buying the commercial licensed edition for projects based on the GPL in production, Deleting all the projects in production based on GPL2 version, Releasing all the extensions as GPL2 code. The first 2 options are nothing realistic for finished projects. The third option could be fine, but as most of the extensions are very specific, cleaning the code to make it usable by other users means lot of works and also I am not sure the clients will appreciate to have their website designs and specific functionality released publicly. The copyrights holding company even contacted some clients directly, giving them the "choice". I know that this is a very corporate interpretation of GPL2, and a such action is nothing close to legal, but as an independent developer, I don't want to take the risk to get involved in some long and tiring legal procedures. PS. This question was first asked on Stack Overflow where it felt out of the scope and closed, after reading the present site FAQ, discussing about software licensing seems fine.

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