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• how install minimum domain email piping to script in centos?

  - by Adam Ramadhan

  hello i have search google on a simple tutorial on how to make a piping email. first how does really email technically work? "stmp is a process that binds to 25, waiting for email request that goes in from another stmp process(in another server) determined by the domain MX route that will send the message to port 25 if any email goes though the MX.domain.tld" that is in a nutshell how emailing work, am i right? or there is something wrong here? second, so if im right, we need to set a SMTP server so we can receive incoming emails from MX SMTP route right? ive googled though google and found two best STMP servers from my opinion, they are EXIM and POSTFIX, can anybody give us a simple tutorial installing and setting up an email piping for a fresh installed linux/centos? example *.domain.tld -> allinonepipe.php thanks.

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• Collision with half of a semi-circle

  - by heitortsergent

  I am trying to port a game I made using Flash/AS3, to the Windows Phone using C#/XNA 4.0. You can see it here: http://goo.gl/gzFiE In the flash version I used a pixel-perfect collision between meteors (it's a rectangle, and usually rotated) that spawn outside the screen, and move towards the center, and a shield in the center of the screen(which is half of a semi-circle, also rotated by the player), which made the meteor bounce back in the opposite direction it came from, when they collided. My goal now is to make the meteors bounce in different angles, depending on the position it collides with the shield (much like Pong, hitting the borders causes a change in the ball's angle). So, these are the 3 options I thought of: Pixel-perfect collision (Microsoft has a sample) , but then I wouldn't know how to change the meteor angle after the collision 3 BoundingCircle's to represent the half semi-circle shield, but then I would have to somehow move them as I rotate the shield. Farseer Physics. I could make a shape composed of 3 lines, and use that as the collision object for the shield. Is there any other way besides those? Which would be the best way to do it(it's aimed towards mobile devices, so pixel-perfect is probably not a good choice)? Most of the time there's always a easier/better way than what we think of...

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• configuring nginx as reverse proxy

  - by user55714

  This isn't directly passenger related..but I am hoping some of you might have tried this for sure so why not ask. I am using passenger with nginx to serve my rails app on a virtual slice host. I am considering putting a reverse proxy for serving static content as well as handling etagged actions. 1 - Can I use my existing nginx installation and just change it to a reverse proxy? Do I even need a web server? What would a typical architecture look like in this case? nginx rev-proxy - nginx web server - passenger? or nginx rev-proxy - passenger? 2 - Is nginx the best choice in this case? 3 - Can my reverse proxy reside on the same slice? Thanks

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• How to handle new domain names?

  - by michael

  I have a new product which I'll call a pen ink reloader. I have a website using my products name, for example, www.inkywink.com which I want to have accessed by searches for keywords such as "pen ink", "pen out of ink" "ink for pens" etc. , since nobody knows that a pen ink reloader exists. I see that its quite difficult to get on front page for these keywords since they have lots of competition. However I notice that the exact phrases I want to rank highly for are available as domains. I purchase "www.penink.com" and "penoutofink.com" which for arguments sake are highly searched and the perfect keywords to get eyes on my money site www.inkywink.com . Two questions: 1. What is my best option to leverage those names so that they appear near top of searches so that I can get traffic to my money site? Do I just have them redirect 301 to inkywink.com or should I create small original content on each with links to my main site? 2. If I just have them redirected to inkywink.com, am I able to use keywords in metatag and headers for each site separately or do they all automatically obtain the same headers and tags as the site to which theyre redirected ? Thanks to anyone who can help as I'm a real newbie to all this.

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• Monit send alert to nagios NSCA

  - by mYzk

  I want to monitor a web with monit check host function and if the site is down then alert it to nagios nsca so it sends the info to nagios and nagios marks it as status OK or host down for example. The problem is that how can I make the monit alert fuction send the info to nagios nsca. I am not sure that this will work, but what I came up with is: set alert exec 'echo -e "nagios nsca format" | /usr/local/nagios/bin/send_nsca -H serveraddress -c /usr/local/nagios/etc/send_nsca.cfg' Would this work and is it the best solution to work with or can it be done some other way?

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• Will Windows Barf on Constant Video Driver Overwrite?

  - by Maarx

  So, I've got a Win7 64-bit gaming PC with GTX 260's. Recently, StarCraft 2 had an issue with flickering, which NVidia fixed with a new set of drivers. However, these new drivers induce unplayable graphical errors with Neverwinter Nights 2, something me and my friends still play from time to time. I am seeking advice on the "best" way to rectify this situation, to be able to switch between two driver releases, without compromising the stability of my system (if Windows stability isn't an oxymoron). I'm wondering if Windows 7 is structured in such a way that I can constantly reinstall these two sets of drivers back and forth overtop each other, possibly six or eight times a day, without very quickly driving myself to reformat to maintain that "just like new" performance. I'm loathe to have to reformat the drive and maintain two copies of the operating system, but I'll do it if I have to.

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• Install Windows XP using USB

  - by AmanBe

  How to install windows xp from usb ? I have the iso image. My cdrom is not working. I read up something on internet about this issue but all the articles are just way too complex and big + they are all different so don't know which one to try. I want to know if someone has tried something like this and to tell me what's the best and easiest way, like some tool that will automatically write the iso file onto the flash drive and make it bootable or smth. Thank you in advance.

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• Algorithm for rating books: Relative perception

  - by suneet

  So I am developing this application for rating books (think like IMDB for books) using relational database. Problem statement : Let's say book "A" deserves 8.5 in absolute sense. In case if A is the best book I have ever seen, I'll most probably rate it 9.5 whereas for someone else, it might be just an average book, so he/they will rate it less (say around 8). Let's assume 4 such guys rate it 8. If there are 10 guys who are like me (who haven't ever read great literature) and they all rate it 9.5-10. This will effectively make it's cumulative rating greater than 9 (9.5*10 + 8*4) / 14 = 9.1 whereas we needed the result to be 8.5 ... How can I take care of(normalize) this bias due to incorrect perception of individuals. MyProposedSolution : Here's one of the ways how I think it could be solved. We can have a variable Lit_coefficient which tells us how much knowledge a user has about literature. If I rate "A"(the book) 9.5 and person "X" rates it 8, then he must have read books much better than "A" and thus his Lit_coefficient should be higher. And then we can normalize the ratings according to the Lit_coefficient of user. Could there be a better algorithm/solution for the same?

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• How do I improve terrain rendering batch counts using DirectX?

  - by gamer747

  We have determined that our terrain rendering system needs some work to minimize the number of batches being transferred to the GPU in order to improve performance. I'm looking for suggestions on how best to improve what we're trying to accomplish. We logically split our terrain mesh into smaller grid cells which are 32x32 world units. Each cell has meta data that dictates the four 256x256 textures that are used for spatting along with the alpha blend data, shadow, and light mappings. Each cell contains 81 vertices in a 9x9 grid. Presently, we examine each cell and determine the four textures that are being used to spat the cell. We combine that geometry with any other cell that perhaps uses the same four textures regardless of spat order. If the spat order for a cell differs, the blend map is adjusted so that the spat order is maintained the same as other like cells and blending happens in the right order too. But even with this batching approach, it isn't uncommon when looking out across an area of open terrain to have between 1200-1700 batch count depending upon how frequently textures differ or have different texture blends are between cells. We are only doing frustum culling presently. So using texture spatting, are there other alternatives that can reduce the batch count and allow rendering to be extremely performance-friendly even under DirectX9c? We considered using texture atlases since we're targeting DirectX 9c & older OpenGL platforms but trying to repeat textures using atlases and shaders result in seam artifacts which we haven't been able to eliminate with the exception of disabling mipmapping. Disabling mipmapping results in poor quality textures from a distance. How have others batched together terrain geometry such that one could spat terrain using various textures, minimizing batch count and texture state switches so that rendering performance isn't negatively impacted?

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• How to implement behavior in a component-based game architecture?

  - by ghostonline

  I am starting to implement player and enemy AI in a game, but I am confused about how to best implement this in a component-based game architecture. Say I have a following player character that can be stationary, running and swinging a sword. A player can transit to the swing sword state from both the stationary and running state, but then the swing must be completed before the player can resume standing or running around. During the swing, the player cannot walk around. As I see it, I have two implementation approaches: Create a single AI-component containing all player logic (either decoupled from the actual component or embedded as a PlayerAIComponent). I can easily how to enforce the state restrictions without creating coupling between individual components making up the player entity. However, the AI-component cannot be broken up. If I have, for example, an enemy that can only stand and walk around or only walks around and occasionally swing a sword, I have to create new AI-components. Break the behavior up in components, each identifying a specific state. I then get a StandComponent, WalkComponent and SwingComponent. To enforce the transition rules, I have to couple each component. SwingComponent must disable StandComponent and WalkComponent for the duration of the swing. When I have an enemy that only stands around, swinging a sword occasionally, I have to make sure SwingComponent only disables WalkComponent if it is present. Although this allows for better mix-and-matching components, it can lead to a maintainability nightmare as each time a dependency is added, the existing components must be updated to play nicely with the new requirements the dependency places on the character. The ideal situation would be that a designer can build new enemies/players by dragging components into a container, without having to touch a single line of engine or script code. Although I am not sure script coding can be avoided, I want to keep it as simple as possible. Summing it all up: Should I lob all AI logic into one component or break up each logic state into separate components to create entity variants more easily?

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• Poor CPU usage under Ubuntu

  - by remek

  Hello, I just upgraded from Ubuntu 9.10 to Ubuntu 10.04 and I am now experiencing a strange problem. My computer has a quad-core processor, and when I am running several processes simultaneously, none of the cores is fully used. Before the upgrade, when I was running 4 processes, each of them was using 100% CPU (I could see that with the 'top' command). But now, CPU usage oscillates and is always pretty low. Has anybody an idea about this problem? Is it due to Ubuntu or to the program I am running? Thank you very much in advance for your help! Best, remek

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• Item missing/damaged from Amazon order? Steps to quickly contact support to get replacements

  - by Gopinath

  I ordered few items from Amazon.com last week and when the package is delivered I found an item is missing. I reached out to Amazon Customer care and they resolved the issue by resending the missing item. Amazon’s customer care is awesome! They just asked me few questions regarding the order, person who accepted the delivery and without any further delay they provided details on when I’ll get the replacement item. Best part is Amazon customer care support is available through email, chat & telephone. I chose support through a chat session and resolved the issue. If you also missed an item or found a damaged item then here are the steps to be followed to get a replacement item Step 1 -  Go to amazon.com/contact Step 2 -  Click on Contact Us button available in General Support section, you may have to provide authentication details Step 3 – Contact Us screen displays your recent order. If your query is related to the displayed order then proceed go to next step otherwise select your order by clicking on Choose Different Order button Step 4 – Select the missing/damaged items from the list of items displayed from your order Step 5 – Choose the issue with your order. In case if an item is missing you may want to choose “Problem with an order”, “Missing item or parts” and “Entire item missing from shipment”. You may want to choose the options that are close to the issue you are facing with your order Step 6 – Choose how you want to support. You can choose either “E-Mail”, “Phone” or “Chat”. Based on the selected Support mode, proceed and communicate to them about the issue.  Rest assured. They will resolve your issue quickly.

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• How to Integrate Dropbox with Pages, Keynote, and Numbers on iPad

  - by The Geek

  The iWork apps are some of the best apps on the iPad, and each show just how powerful a touchscreen device can be with the most basic of computing functions. In fact, there’s not much to dislike about the iWork apps, except for one thing: importing and exporting files. You can open documents from email attachments, download them from websites, or import them from other apps like Dropbox. Once you’ve opened your file in Pages, Keynote, or Numbers on iPad, though, you can only send it via email, upload it to a WebDAV server or Apple’s iDisk service, or wait to sync it with iTunes on your computer. Most other iOS office apps don’t offer nearly as many features as the iWork apps, but they do offer deep integration with Dropbox which makes it easy to view and edit your documents no matter where you are. Dropbox is the most popular file sync and sharing solution, and makes it absolutely painless to share folders with anyone around the world and keep your computers in sync. That is, computers and applications that integrate with Dropbox. However, you don’t need to give up on using Dropbox with iWork apps on iPad. Today we’re going to look at how you can enable WebDAV compatibility on your Dropbox account to let Pages integrate nearly the whole way with Dropbox. It’s not a perfect solution, but it’s much better than the default setup. So let’s get started Latest Features How-To Geek ETC How to Integrate Dropbox with Pages, Keynote, and Numbers on iPad RGB? CMYK? Alpha? What Are Image Channels and What Do They Mean? How to Recover that Photo, Picture or File You Deleted Accidentally How To Colorize Black and White Vintage Photographs in Photoshop How To Get SSH Command-Line Access to Windows 7 Using Cygwin The How-To Geek Video Guide to Using Windows 7 Speech Recognition Stylebot Customizes Web Pages in Chrome, Now Has Downloadable Styles Blackberry, Dell, Apple, and Motorola Tablets Compared [Infographic] Encrypt Your Google Search Queries Vintage Posters Showcase the History of Tech Advertising Google Cloud Print Extension Lets You Print Doc/PDF/Txt Files from Web Sites Hack a $10 Flashlight into an Ultra-bright Premium One

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• Missing menu items for Azure SQL tables within SQL Server Management Studio?

  - by Sid

  I have a table (say Table1) that is replicated via SQL Data Sync Agent across a local SQL Server 2012 as well as an Azure SQL Server (part of Microsoft Azure). Everything about Table1 (schema, table values etc ) is identical to the best of my understanding. However, when I list and right click Table1 from Microsoft SQL Server Management Studio 2012 (SSMS), I get some very different menu options, even for seemingly basic stuff. Lets focus only on the 'Design' menu item: It is visible for Table1 on the local SQL server in SSMS It is missing for Table1 on Azure SQL via SSMS It is visible for Table1 (as Open Table Definition) on Azure SQL when reaching it via Visual Studio 2012 (Server Explorer - Data connections) This is seen in the screenshots below: Now I use scripts from some real stuff (esp when I need to check in the SQL scripts etc) but this difference concerns me to some extent. Am I witnessing just a tools artifact in SQL Server Management Studio when connecting to Azure SQL? or is it something more serious about limitations of Azure SQL itself (although, just seeing the Design surface is so basic!)?

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• Lightweight tool for viewing raw HTTP messages?

  - by rewbs

  Hi, I'm investigating differences in behaviour between a couple of Web servers. I need to see raw response data from the servers (i.e. before the response is de-chunked if it has "Transfer-Encoding:chunked" and before it is decompressed if it has "Content-Encoding:gzip"). I can find plenty of simple HTTP client that nearly do what I need (e.g. Poster, RESTClient), but they tend to decode the response one step too far. Network analysers like Wireshark give me what I need but are a bit heavyweight. Telnet is my best bet so far, but is a bit too simplistic (actions like capturing data or entering requests are a bit laborious). Can anyone recommend a good, lightweight tool for sending / viewing the raw data that constitute HTTP messages? Edit: I should add that I'm on Windows. Also, the tool would need to work both with remote and local servers.

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• How do you configure IIS 7 to use a subdirectory as the default document?

  - by Mark Rogers

  So I have a website running on a discount asp.net account, and I put an asp.net mvc app in a subdirectory. If my url is 'www.website.com' and my app is in directory 'sample', then 'www.website.com/sample' will execute the mvc app. My problem is that I want the app to be shown when you go to 'www.website.com' not just 'www.website.com/sample'. I have access to the IIS Manager, and I'm sure there are many ways to do this. What's the best way to do this?

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• ubuntu to ubuntu backup in internal network

  - by amirash

  hey, i got my development "home" server witch is ubuntu 10, i brought today a computer in order to make a backup to this computer (the development server does also to him self backups every day but im paranoaid so i want to have two backups just in case on diffrent computers) what is the best way to backup the system core of the development server (like norton ghost) & do a full & incrmnt backup of him to the new computer that ive brought? rsync? rdiff? scp? clonezilla?

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• Where to download MS SQL Server 2005 Developer Edition?

  - by Mark

  Just got put in charge of a big web project. All I know is the web server is running MS SQL 2005, so I need something comparable to test locally. I figure developer edition is my best bet because it offers everything that the enterprise edition does, but is for development purposes only. But this page is pretty worthless http://www.microsoft.com/sqlserver/2005/en/us/developer.aspx Where do I actually download it? What about SQL 2005 Express? Would that meet my needs? I can't figure out all the differences between these stupid MS products.

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• Heightmap and Textures

  - by Robert

  Im trying to find the "best way" to apply a texture to a heightmap with opengl 3.x. Its really hard to find something on google because tutorials are olds and they're all using different methods, im really lost and i dont know what to use at all. Here is my code that generates the heightmap (its basic) float[] vertexes = null; float[] textureCoords = null; for(int x = 0; x < this.m_size.width; x++) { for(int y = 0; y < this.m_size.height; y++) { vertexes ~= [x, 1.0f, y]; textureCoords ~= [cast(float)x / 50, cast(float)y / 50]; } } As you can see, i dont know how to apply the texture at all (i was using / 50 for my tests). Result of that code : I would like to have something very basic like : (you can find more pics in his blog) Edit : my texture size is 1024x1024.

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• Azure VM : Connection refused by host

  - by Simon Kérouack

  I recently stopped a subscription with 14 VMs in it and restarted it a few days later. Now all my VMs are working just fine at the exception of 6 used for MongoDB. They respond to ping and so they show as online in the azure dashboard but they do not answer to anything else. I tried (from different locations, in and out of the azure cloud) ssh : connect to host * port *: Connection refused telnet : Unable to connect to remote host: Connection refused mongo : exception: connect failed The ports for ssh and mongo are opened in azure. I tried restarting the VMs a few times trough the azure dashboard, they seem to restart successfully but still refuse all connections. I already looked for similar issues and the best solutions I found was to wait... the issue has been happening for 7 days and waiting is no more an option.

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• 1080p Screen resolution problem after 10.04 to 12.04 update

  - by Ale

  I have a Samsung LCD 40" with a NVidia GeForce 6150SE nForce 430 Card. I recently upgraded from 10.04 to 12.04 and the best resolution I can get is 1360x768. I've tried the propietary drivers available on the repository kmod:nvidia_current kmod:nvidia_173_updates kmod:nvidia_current_updates kmod:nvidia_96 kmod:nvidia_96_updates kmod:nvidia_173 I've also downloaded latest from NVidia's Web, version: 295.40. But still no luck. With Nouveau driver, I can only get 1024x768. I know there is no problem with my hardware (video card, cable and monitor), I was using it perfectly on 10.04. Can anybody suggest something else I could try, to get my 1920x1080 resolution back? Thanks in advance. Here are some more information, that I got reading other similar posts on askubuntu. $ lspci | grep VGA 00:0d.0 VGA compatible controller: NVIDIA Corporation C61 [GeForce 6150SE nForce 430] (rev a2) $ xrandr xrandr: Failed to get size of gamma for output default Screen 0: minimum 320 x 240, current 1360 x 768, maximum 1360 x 768 default connected 1360x768 0 0 0mm x 0mm 1360x768 50.0 52.0* 1024x768 51.0 800x600 53.0 54.0 55.0 680x384 56.0 57.0 640x480 58.0 576x432 59.0 512x384 60.0 400x300 61.0 62.0 63.0 320x240 64.0

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• is there a checklist that a small website should

  - by Mecon

  I am not a web developer - this would be my first foray. I can do HTML/CSS/Javascript, but never created a website for a company. If anybody is creating a site for small company (expecting some 10-15 static pages), what kinda things would it need to have? I am thinking of the following: Make the eventual owner buy in his/her name: Domain name, Web Hosting package and Email package. Q - DO Web Developers generally ask their clients to buy this stuff and then ask them to share their passwords? OR - Do Web Developers ship the source files to clients so that they can upload it? Create Cross Browser compatible HTML+CSS+javascript pages Add SEO stuff like Meta tags and xml file for crawler Buy professional images from stock website Q - IS there is a best-practice for this step? Add Copyright stuff. Q - ANY idea about how to do this? Add Faceboook widgets, so people can 'like' my website. Register website somewhere so that its searchable from multiple search-engine/yellopages. Q - DOES such a thing exist? Please check my checklist :) and let me know what you think could be missing? Thanks!

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• Splitting Multiple Files in Windows

  - by Justin Boucher

  We have a 21TB LUN full of images that are approx 600K in size in multiple sub folders on the disk. We are trying to split the 21TB LUN into 8 smaller LUNs that are about 2.6TB a piece in order to process the images more effectively. My question is how we can determine what 2.6TB is on the drive? What is the best tool to mark this data so we can copy it to the new smaller LUNs with robocopy or emcopy without overfilling the smaller LUNs? Is there a third-party tool that would be better suited for this task? Thank you in advance for your assistance.

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• Plesk Subdomain folder group and permission problem

  - by Jake

  I am working on a dedicated server from some web host. In Plesk 9.5, after creating a subdomain sub.domain.com, with login using main account, plesk automatically creates a folder domain.com/subdomain/sub with user and group of root I want to upload some files (the framework api) in domain.com/subdomain/sub itself instead of domain.com/subdomain/sub/httpdocs but I can't. domain.com/subdomain/sub/httpdocs has user and group of [main account_user] and psaserv respectively Is there a way to modify the user/group of domain.com/subdomain/sub from plesk so that I can upload files inside it? Otherwise, what is the next best solution?

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• What virtualization solution should I try next, after hitting problems w/ VMWare Player in dual-netw

  - by Alex R

  I have been using VMWare Player 2.5 for a while (Ubuntu guest on Vista host, 32-bit). VMWare had worked great until now but then I hit a brick wall: Due to some reorganization of my home network, the host machine now has to use a wireless connection to reach the Internet, while the printer, fileserver, and other important stuff are attached to a local gigabit hub. I have tried several tricks, such as editing the .vmx file, changing settings in vmnetcfg, etc, but I'm still unable to get the virtual Ubuntu box to connect each of the two virtual NICs to different networks (I did get it to recognize two NICs, but both DHCP'd onto the gigabit LAN). So, I'm ready to dump vmware for something with a little more low-level control of network settings. Virtualization is such a crowded space, I could spend months evaluating every product out there. I'm hoping for a shortcut... Can anyone recommend the best VM for my situation described above? Thanks

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