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  • How to enable ufw firewall to allow icmp response?

    - by Jeremy Hajek
    I have a series of Ubuntu 10.04 servers and each one has ufw firewall enabled. I have allowed port 22 (for SSH) and 80 (if it's a webserver). My question is that I am trying to enable icmp echo response (ping reply). ICMP functions differently than other protocols--I know it is below the IP level in a technical sense. You can just type sudo ufw allow 22, but you cannot type sudo ufw allow icmp How should attack this problem?

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  • Client-side prediction for FPS

    - by newprogrammer
    People that understand client-side prediction and client-side interpolation, I have a question: When I play the game Team Fortress 2, and type cl_predict 1 into the developer's console, it enables client-side prediction. The also says "6 predictable entities reinitialized". It says this regardless of how many players are on the server, which makes sense, because other players are not predictable entities. I thought client-side prediction was only for the movement of the player. Are there other entities that the client can provide prediction for?

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  • How can we unify business goals and technical goals?

    - by BAM
    Some background I work at a small startup: 4 devs, 1 designer, and 2 non-technical co-founders, one who provides funding, and the other who handles day-to-day management and sales. Our company produces mobile apps for target industries, and we've gotten a lot of lucky breaks lately. The outlook is good, and we're confident we can make this thing work. One reason is our product development team. Everyone on the team is passionate, driven, and has a great sense of what makes an awesome product. As a result, we've built some beautiful applications that we're all proud of. The other reason is the co-founders. Both have a brilliant business sense (one actually founded a multi-million dollar company already), and they have close ties in many of the industries we're trying to penetrate. Consequently, they've brought in some great business and continue to keep jobs in the pipeline. The problem The problem we can't seem to shake is how to bring these two awesome advantages together. On the business side, there is a huge pressure to deliver as fast as possible as much as possible, whereas on the development side there is pressure to take your time, come up with the right solution, and pay attention to all the details. Lately these two sides have been butting heads a lot. Developers are demanding quality while managers are demanding quantity. How can we handle this? Both sides are correct. We can't survive as a company if we build terrible applications, but we also can't survive if we don't sell enough. So how should we go about making compromises? Things we've done with little or no success: Work more (well, it did result in better quality and faster delivery, but the dev team has never been more stressed out before) Charge more (as a startup, we don't yet have the credibility to justify higher prices, so no one is willing to pay) Extend deadlines (if we charge the same, but take longer, we'll end up losing money) Things we've done with some success: Sacrifice pay to cut costs (everyone, from devs to management, is paid less than they could be making elsewhere. In return, however, we all have creative input and more flexibility and freedom, a typical startup trade off) Standardize project management (we recently started adhering to agile/scrum principles so we can base deadlines on actual velocity, not just arbitrary guesses) Hire more people (we used to have 2 developers and no designers, which really limited our bandwidth. However, as a startup we can only afford to hire a few extra people.) Is there anything we're missing or doing wrong? How is this handled at successful companies? Thanks in advance for any feedback :)

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  • The Do's and Don'ts When Hiring an SEO Company For Your Online Business

    Websites catering to your business requires the implementation of Search Engine Optimization to help improve its potential for success. The Internet promises millions of potential clients and customers for any business, but this advantage caused many competitors to appear in the World Wide Web to target anonymity in their own respective industry.

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  • Mix metrics for June 20, 2011

    - by tbonnema
    One of the busiest week's ever for Mix this past week, thanks to Suggest-a-Session contest, which just wrapped up at midnight Pacific last night. See for yourself: Registered Mix users (weekly growth) 76,378 (+1.7%) Active users (percent of total) Last 30 days: 4,383 (5.7%) Last 60 days: 5,232 (6.9%) Last 90 days: 6,240 (8.2%) Traffic (30-day) Visits: 17,368 Page views: 148,426 Twitter Followers: 7,116 List mentions: 380 User-generated content (30-day) New ideas: 10 New questions: 11 New comments: 30 New group messages: 34 New direct messages: 1,661 Groups There are currently 1,603 Mix groups (requires login).

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  • Search Engine Optimization - The Five Factors Search Engines Use to Rank Websites

    At the end of the day, SEO requires a lot of extremely specialized knowledge, time, and attention - on an ongoing basis. But because a SEO effort can give a website's rankings a dramatic boost in the search results - and there is a significant connection between search engine ranking and search referral traffic - it is well worth doing whatever it takes to develop the knowledge and to be able to invest the time and attention.

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  • Should the test and the fix be written by different people?

    - by Nutel
    There is a common practice in TDD to write a test before fix to avoid regression and simplify fixing. I just wonder what if the test and fix will be written by different people, total spent time will be almost the same but as now three people will think about possible failures (+tester) we increase probability that fix will cover all possible failure scenarios. Does this practice make sense or it will just waste additional time needed for one more person to familiarize with bug?

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  • Calculating a circle or sphere along a vector

    - by Sparky
    Updated this post and the one at Math SE (http://math.stackexchange.com/questions/127866/calculating-a-circle-or-sphere-along-a-vector), hope this makes more sense. I previously posted a question (about half an hour ago) involving computations along line segments, but the question and discussion were really off track and not what I was trying to get at. I am trying to work with an FPS engine I am attempting to build in Java. The problem I am encountering is with hitboxing. I am trying to calculate whether or not a "shot" is valid. I am working with several approaches and any insight would be helpful. I am not a native speaker of English nor skilled in Math so please bear with me. Player position is at P0 = (x0,y0,z0), Enemy is at P1 = (x1,y1,z1). I can of course compute the distance between them easily. The target needs a "hitbox" object, which is basically a square/rectangle/mesh either in front of, in, or behind them. Here are the solutions I am considering: I have ruled this out...doesn't seem practical. [Place a "hitbox" a small distance in front of the target. Then I would be able to find the distance between the player and the hitbox, and the hitbox and the target. It is my understanding that you can compute a circle with this information, and I could simply consider any shot within that circle a "hit". However this seems not to be an optimal solution, because it requires you to perform a lot of calculations and is not fully accurate.] Input, please! Place the hitbox "in" the player. This seems like the better solution. In this case what I need is a way to calculate a circle along the vector, at whatever position I wish (in this case, the distance between the two objects). Then I can pick some radius that encompasses the whole player, and count anything within this area a "hit". I am open to your suggestions. I'm trying to do this on paper and have no familiarity with game engines. If any software folk out there think I'm doing this the hard way, I'm open to help! Also - Anyone with JOGL/LWJGL experience, please chime in. Is this making sense?

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  • Search Engine Optimization - The Five Factors Search Engines Use to Rank Websites

    At the end of the day, SEO requires a lot of extremely specialized knowledge, time, and attention - on an ongoing basis. But because a SEO effort can give a website's rankings a dramatic boost in the search results - and there is a significant connection between search engine ranking and search referral traffic - it is well worth doing whatever it takes to develop the knowledge and to be able to invest the time and attention.

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  • State Transition Constraints

    Data Validation in a database is a lot more complex than seeing if a string parameter really is an integer. A commercial world is full of complex rules for sequences of procedures, of fixed or variable lifespans, Warranties, commercial offers and bids. All this requires considerable subtlety to prevent bad data getting in, and if it does, locating and fixing the problem. Joe Celko shows how useful a State transition graph can be, and how essential it can become with the time aspect added.

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  • Easy Ways to Build a Website

    It is true that it is easier to make money online through blogs and websites. However, this fact only stands true if you are able to plan well. Building a website requires no rocket science just a good roadmap and good support is helpful too.

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  • Template Method

    Consider you need to develop some searching engine. Engine will look for different messages that has been sent. Searching process consists with few operations which make sense for each of message, BUT could have some characteristic which differs.You want to write Searcher, which will allow you encap

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  • Automatically minify and combine JavaScript and CSS files in any web site

    This article describes a complete package that speeds up loading of JavaScript, CSS, and images in an ASP.NET web site. It accomplishes this by minifying JavaScript and CSS files on the fly (and caching the minified content), combining JavaScript and CSS files, making it easy to load files from cookieless domains, and much more. This article has full step by step installation instructions for both IIS 7 and IIS 6 (each version requires different additions to web.config). It will also detail how to use all the features, complete with short examples.

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  • Importance of Having a FAQ Web Page

    Companies those are serious about their online business, lay emphasis on developing a website that is perfect in every sense. Your site is the virtual shop that can be accessed 24/7/365 days a year. ... [Author: Alan Smith - Web Design and Development - June 17, 2010]

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  • What can I do with urllib?

    - by Aerovistae
    I grasp that it can fetch internet resources, but I'm not really fully appreciating what that means. I was doing the challenges at pythonchallenge.com, and I got past the one that requires urllib to fetch the page and read the source, but I don't see how this is useful quite yet. And examples are kind of lacking in diversity. What else can it do, or how can I use this to my advantage? (Besides building a web browser...)

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  • SQL Server: Natural Key Versus Surrogate Key

    When designing a database to support applications you need to consider how you are going to handle primary keys. This article explores natural and surrogate keys, and discusses the pros and cons of each, allowing you to determine what makes the best sense in your environment when you are designing your databases. NEW! SQL Monitor 2.0Monitor SQL Server Central's servers withRed Gate's new SQL Monitor.No installation required. Find out more.

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  • 3D models overlapping each other

    - by Auren
    I have a problem at the moment when I draw some models to teach me more about 3D game programming. The models at the moment overlaps each other from some angles witch makes sense since the game at the moment draws from left to right, line after line. However my question is: Is there any easy escape from this issue or is there any way that you could draw the in-game world from the players position? I would really appreciate if someone could give me some answers on this.

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  • Is libunity planning on including functions for Unity Places?

    - by SaidKLE
    I am unclear on this, because I have heard mention of a proposed API for Unity Places, and such an API would be extremely useful for projects involving home automation. I am interested in developing in that direction, but I haven't been able to find the API for Unity Places. It would make the most sense of libunity was to include Unity Places because it would put all the functionality of the Unity launcher into one place. If libunity is not the API for UPs, does such an API exist, and how would I find it?

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  • Is there going to be a friendly Unity settings window?

    - by Valorin
    Currently, as far as I am aware, you need to use the CompizConfig Settings Manager application to play with the Unity configuration settings. While this makes sense, from a technical point of view, it requires the user to know about the settings manager, install it, and then find the Unity options within it. Not very user friendly. Is there a user friendly configuration application planned that will offer all the configuration options in an easy-to-use for new people fashion?

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  • Torvalds' quote about good programmer

    - by beyeran
    Accidentally I've stumbled upon the following quote by Linus Torvalds: "Bad programmers worry about the code. Good programmers worry about data structures and their relationships." I've thought about it for the last few days and I'm still confused (which is probably not a good sign), hence I wanted to discuss the following: What interpretation of this possible/makes sense? What can be applied/learned from it?

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  • installed ubuntu 12.04 and no wireless internet at all

    - by Memoq
    I'm extremely new to ubuntu. I installed 12.04 on a laptop that had no os. I've tried following these forums to troubleshoot my internet problems only to be confused by all the steps. I need help. I'm willing to follow any instruction as long as they make sense. Any help would be nice. The equipment i have is a Dell inspiron 1100 laptop wireless card is D link 2.4 dwl -g650 product ar5212/ar5313

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  • Linux WD EARS Advanced Hard Drive Format

    <b>LinuxConfig:</b> "Nowadays hard drive manufactures are switching to a new hard drive technology which uses 4KB sectors size instead of conventional 512B. This new technology requires little tweaks to get a better performance in comparison to out-of-the-box settings."

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  • Multitasking or Tombstoning and Isolated Storage in Windows Phone 7

    Windows Phone 7 manages multiple active applications by implementing a stack. In a sense, this application stack extends the page stack within a single Silverlight program. You can think of the phone as an old-fashioned web browser with no tab feature and no Forward button. But it does have a Back button and it also has a Start button, which brings you to the Start screen and allows you to launch a new program.

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  • Is it difficult to get a job at Microsoft?

    - by Maxtor
    I'm curious how difficult it really is to get a job working for Microsoft. Is Microsoft similar to Google in a sense that they hire people who are really good at programming? Also, does participating in communities such as the forums at Microsoft help (if at all) you with getting selected for an interview ? How about being a MVP in something like C# and/or .NET? Edit: This question refers only to programming jobs.

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