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  • Make the sound louder in Lubuntu

    - by Andrew
    I have a Toshiba r835 running Lubuntu 11.10. Turning the volume slider up all the way doesn't give very loud sound. I've tried typing alsamixer in a terminal and turning up all the levels there to maximum, but the speakers are still fairly quiet. Is there a simple way to increase maximum volume in software? I understand that there are physical limits to the sound the laptop's speakers can produce, but I suspect my maximum volume is limited by software. EDIT: This is exactly the type of solution I'm looking for. However, it doesn't work for me. What I did: sudo pico /etc/asound.conf This file does not exist, so I create a new one, containing: pcm.!default { type plug slave.pcm "softvol" } pcm.softvol { type softvol slave { pcm "dmix" } control { name "Pre-Amp" card 0 } min_dB -5.0 max_dB 20.0 resolution 6 } I reboot the machine, and type alsamixer. I use my left/right arrow keys to inspect the various volume options. I expect to see a new option, called Pre-Amp, but I don't see one. This fix seems to work for other people. Why doesn't this fix work for me?

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  • How to prevent duplication of content on a page with too many filters?

    - by Vikas Gulati
    I have a webpage where a user can search for items based on around 6 filters. Currently I have the page implemented with one filter as the base filter (part of the url that would get indexed) and other filters in the form of hash urls (which won't get indexed). This way the duplication is less. Something like this example.com/filter1value-items#by-filter3-filter3value-filter2-filter2value Now as you may see, only one filter is within the reach of the search engine while the rest are hashed. This way I could have 6 pages. Now the problem is I expect users to use two filters as well at times while searching. As per my analysis using the Google Keyword Analyzer there are a fare bit of users that might use two filters in conjunction while searching. So how should I go about it? Having all the filters as part of the url would simply explode the number of pages and sticking to the current way wouldn't let me target those users. I was thinking of going with at max 2 base filters and rest as part of the hash url. But the only thing stopping me is that it would lead to duplication of content as per Google Webmaster Tool's suggestions on Url Structure.

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  • What every beginner should know about website development? [closed]

    - by user975234
    I am a novice at building websites and considering to make one. But there is a lot of confusion that's going on right now. I guess every beginner faces them. Few questions that come up are: I have an idea and a need a website. That's all i know right now. But how do i start ? HTML is for sure the basic language but there are a hell of other technologies too. What is actually asp, php, ruby etc? How do i choose the right one from them? Other than asp, php there is javascript and other languages under the same belt. What are they used for? Hosting. When i am choosing the host, what considerations i have to keep in mind ? What support do i need from them (other than getting some important space obviously!). I am considering of making the website in ruby on rails. I don't know about php and what effect it would have if i choose ruby over php. I thought about ruby just because its new and i dont want to learn some thing "not new"! :P Moreover what is a framework and how does a framework effect my development process? These three questions are just to explain my "confusion" better. There is obviously a lot more to it. Just to try to answer how the flow of website development goes keeping in mind my questions!

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  • Thanks All the readers and community and Happy new year to all of you.

    - by Jalpesh P. Vadgama
    This is my first blog post for new year 2011 and I would like to take this opportunity to thank all the readers for making my blog very successful and accepting me a community member. As year 2010 has lots of up down in IT filed it was recession period and now we almost recovered from it. Personally year 2010 has been very successful to me as I have been awarded as Microsoft Most Valuable Professional for visual C#. And It was one of the greatest achievement of my life. I would like to take this opportunity to thanks Microsoft for this and thanks all friends specially Jacob Sebastian who has given me guidance any time I required it. I have been also awarded dzone most valuable blogger this year and it was a nice surprise from dzone. I would like thanks dzone for this. Once again I am wishing you happy new year and may this year will bring success to all of you. One more thing I have found that I have met lots of people who is quite intelligent and exceptional developers and IT professionals but they are not blogging their stuff. I would say please my blog post a why a developer should write blog and Start blogging immediately because unless and until you don’t blog community will not know what you are doing.  Till then happy blogging and programming ... Stay tuned for more..

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  • Oracle@info360: Advance Beyond Point Solutions To An Enterprise Content Strategy

    - by kellsey.ruppel(at)oracle.com
    The info360/AIIM conference is March 22-24 in Washington DC. We have a number of customer speakers this year talking on the theme of “Advance Beyond Point Solutions To An Enterprise Content Strategy.” These customers all started by addressing a particular use case, but then used the infrastructure they had created to quickly and cost effectively stand up solutions to new business problems.  Andy MacMillan, VP of Product Management at Oracle, will give a thought provoking opening keynote at 8:50 AM on Tuesday, March 22nd. He will be joined by Juan Jose Goldschtein, the CIO of the Organization of American States. The OAS has developed a human rights website that is the front end to a case management system for human rights violations. The implementation supports digital signatures on iPads, so their executives can approve workflows and keep cases moving forward while they are busy traveling and investigating abuses.Other customer speakers include:Tom Robinette, Director of Applications and IT Engineering, Dresser-RandRobin Crisp, Program Manager, FDAMonica Crocker, Corporate Records Manager, Land O’ LakesBrian Skapura, The American Institute of ArchitectsKathy Adams and Leslie Becker, The Nature ConservancyIrfan Motiwala, Sr. VP, Moody’s Investment ServicesMolly Wenzler, Director of Electronic Media, MeadWestvaco Other sessions include our Super Session that kicks off the Oracle Track @info360 on Wednesday. At 11:00 AM, Senior Director of Product Marketing, Howard Beader will present The Social Enterprise – Combining People, Processes and Content. This session will focus on how customers have brought social media, business process management, and content management together to supercharge their organizations. Oracle customers can arrange one-on-one meetings with Oracle executives and product experts, and attend the VIP customer appreciation event. Oracle will be joined by Oracle partners:FujitsuKesteTeamInformaticsKapowSena SystemsDTIYou can learn more about discounts for Oracle customers and register on our Oracle@info360 page.To see more about the customers and sessions that will be presented, you can look at the Oracle Track page on the AIIM/info360 website.Technorati Tags: oracle, AIIM, info360, content management, social enterprise

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  • Why isn't there a culture of paying for frameworks?

    - by Marty Pitt
    One of the side effects of the recent trend of "Lean" startups, and the app store era, is that consumers are more acclimatised to paying small prices for small games / products. Eg.: Online SAAS that charges ~$5 / month (the basecamp style of product) Games which are short, fun, and cheap ($0.99 from the app store This market has been defined by "doing one thing well, and charging people for it." DHH of Rails / 37 Signals fame argues that if your website isn't going to make money, don't bother making it. Why doesn't the same rule apply to frameworks? There are lots of software framework projects out there - many which are mature and feature-rich, which offer developers significant value, yet there doesn't seem to be a market or culture of paying for these. It seems that the projects which do charge money are often things like UI component toolsets, and are often marginalized in favour of free alternatives. Why is this? Surely programmers / businesses see the value in contributing back to projects such as Ruby, Rails, Hibernate, Spring, Ant, Groovy, Gradle, (the list goes on). I'm not suggesting that these frameworks should start charging for anyone who wants to use them, but that there must be a meaningful business model that would allow the developers to earn money from the time they invest developing the framework. Any thoughts as to why this model hasn't emerged / succeeded?

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  • Impossible to select folders and files with mouse (Ubuntu 12.04)

    - by François
    First-time post for me here (after being a regular reader for two years though) so thank you all for the quality of replies and help provided. My problem is very simple apparently but a tricky one. I just installed the Ubuntu 12.04(1) along with the Gnome3-shell environment on my new pc desktop Acer Aspire X3995 (see config below). Everything work (more or less) so far (I still have problems of sound and disabled 2-fingers gestures with my screen -- which I will have to deal with xconfig settings I think -- though), but the main problem is that I cannot select files/folders with my USB mouse. When I try to double click on them, nothing happen (sometimes one folder or file is selected but then unselected again). Note that the navigation works perfectly from the USB keyboard and from the touch-screen (I am using a 23" wide touch-screen Acer Monitor T231Hbmid). Also, the mouse works perfectly with other menu navigation, with the only difference that the text of certain menus is selected as if I was holding the left click on them. So I assume the problem is only related to the mouse. Needless to say that the usual basic hardware checks have been performed (unplugging, powered-off, etc.). My level is simply "advanced user", meaning that if you provide me with intelligible input I should find my way, but please don't expect too much technical/specific knowledge... :) Please let me know if you need more information on this bug. Now, fingers crossed... and thanks in advance! Ciao, François Config of Acer Aspire X3995: Ubuntu 12.04 / Gnome3-shell environment / Intel Core i5 3450 / nVidia GeForce 605, 1Gb. Screen: Acer Monitor TFT 23" wide T231Hbmid

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  • BI&EPM in Focus - November 2011

    - by Mike.Hallett(at)Oracle-BI&EPM
    Enterprise Performance Management A Thing of Beauty, by Alison WeissAvon’s enterprise performance management system delivers accurate information and critical insight to managers at every level of the organization Oracle Crystal Ball Helps Managers Guard Against Volatility, by Alison Weiss The Insight Game, by Aaron LazenbyEnterprise performance management can deliver insights crucial to navigating the volatility of the global economy—and that’s no game of checkers. KPI vs. the Bottom Line, by Edward RoskeFor managers, is tracking the key metrics for their departments enough to ensure success for the entire business? The CEO for Oracle partner interRel shares his opinion. Deep Integration, by Aaron LazenbyThe synthesis of Oracle Hyperion applications and core Oracle technologies can deliver deep benefits to analytics-driven businesses. Oracle Crystal Ball. Oracle's #1 Solution for Risk Management Follow EPM Documentation at Hyperion EPM Info for news about EPM documentation releases and updates (twitter | facebook | Linkedin) Whitepaper: Integrating XBRL Into Your Financial Reporting Process Oracle Hyperion Disclosure Management Customer Story: StealthGas Inc. Saves 12 Accountant Days Yearly, Validates XBRL-Compliant Financial Filing Data in One Day Sherwin-Williams Argentina I.C.S.A. Accelerates Budget Preparation Process by 75% BBDO Germany GmbH Consolidates Financial and Planning Processes for More Than 50 Agencies StealthGas Inc. Saves 12 Accountant Days Yearly, Validates XBRL-Compliant Financial Filing Data in One Day Business Intelligence Webcast Replay: Oracle Data Mining & BI EE - Predictive Analytics (Part 2) Innovation Award Winners - BI/EPM: HealthSouth, State of MD, Clorox Company, Telenor and Dunkin Brands Leeds Teaching Hospitals National Health Service Trust Builds Budget Reports Six Times Faster, Achieves 100% ROI in 12 Months with Oracle Business Intelligence Home Credit Group Consolidates Reporting and Saves Time across All Business Units w/ Oracle Essbase & OBIEE Autoglass Improves Business Visibility and Services to Customers and Partners with Oracle Business Intelligence Events Download Oracle OpenWorld Oct 2011 Presentations select Middleware - BI or Applications - Hyperion Oracle Business Analytics Summits:learn about the latest trends, best practices, and innovations in business intelligence, analytics applications, and data warehousing Webcast Nov 15 9am PST: Running the Last Mile, Beyond Financial Consolidations - Streamlining the Close and Addressing the SEC's XBRL Mandate Webcast Dec 13 1pm PST: Defining Your Mobile BI Strategy (BICG) New Training Available: Oracle BI Publisher 11g R1: Fundamentals Webcast Replay: How to Expand the Usage of Analytics in your Organization while Driving Down IT Spend Webcast Replay: Real-Time Decisions (RTD) Updated Use Cases for Ecommerce Personalization in Financial Services & Retail

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  • Unity Launcher only runs once - requires lightdm restart before it runs again

    - by Don
    I have an intermittent problem that just started showing up several days ago. I am running 11.10 and all updates are current. I first saw the symptom with a custom version of the "Home" nautilus-home.desktop file I created in ~/.local.share/applications. I added a few static shortcuts to specific folders. What I found was, clikcing the icon once would open up my home folder, but after closing that nautilus window, clicking the icon again did nothing (did not even show icon backlight animation). However, I could right click on the same icon and access my short cuts as many times as I want. Symptom persisted until restarting lightdm. Just yesterday I saw the same sort of symptom happen with a custom launcher I created for a chromium-borwser to open a specific URL (with a few short cuts to other URLs). Click the icon - it works once. Then never again. Right click the icon and I can use the short cuts over and over - no problem. Note - at one point I assumed I might have a problem with my custom .desktop file, so I did a test by removing my custom nautilus-home.desktop. However, even after restarting lightdm, and verifying the home icon was the standard one from /opt/share/applications (all my custom shortcuts were gone) I saw the same symptom re-appear - it runs once and then not again until restarting lightdm. It seems to be intermittent and seems to move between various launchers. Not sure what to do or even what background data to gather. Attempt to improve question after the first answer: I tried the following: 1) remove all custom launchers 2) reboot 3) add custom lauchers back 4) reboot 5) attempt to use .... still have "runs once and never again" symptom with several launchers

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  • Update Your NetBeans Plugin's "Supported NetBeans Versions" In The Next Two Weeks!

    - by Geertjan
    For each NetBeans plugin uploaded to the NetBeans Plugin Portal, the registration page starts like this: Note how the "Supported NetBeans Versions" field is empty, i.e., no checkbox is checked, for the plugin above. As you can also see, there is a red asterisk next to this field, which means it is mandatory. It is mandatory for the latest version of the NetBeans Plugin Portal, while it wasn't mandatory before, so that several plugins were registered without their supported version being set. Therefore, since the version is now mandatory, anyone who doesn't want their plugin to be hidden for the rest of this year, and removed on 1 January 2013 if no one complains about their absence, needs to go to their plugin's registration page and set a NetBeans Version. E-mails have been sent to plugin developers of unversioned plugins already, over the last weeks. Currently there are 91 plugins that still need to have their NetBeans Version set. Probably at least 1/3 of those are my own plugins, so this is as much a reminder to myself as anyone else! Whether or not you have received an e-mail asking you to set a NetBeans Version for your plugins, please take a quick look anyway and maybe this is a good opportunity to update other information relating to your plugin. You (and I) have two weeks: on Monday 16 April, any NetBeans plugin in the Plugin Portal without a NetBeans Version will be hidden. And then removed, at the start of next year, if no one complains.

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  • How to organize music files?

    - by newbie
    I'm trying to re-organize my music files. I copied them from my iPod before it died, so they have funky names, like DGEDH.mp3. I tried using a Windows utility to rename them from their ID3 tags, but it didn't work very well--it created a bunch of folders (one for each album in theory, but more like 7 or 8 in reality) and renamed the files with non-English characters. Most of the files are MP3s, but there's at least one or two other file types as well. I'd like to copy them to a new folder and try a Ubuntu utility to rename and re-organize them. In Windows, this would be straightforward--I'd use the Search function (with no file name specified) to list all of the files in the main folder and its subfolders, then drag and drop them to the new folder. What's the easiest way to accomplish the same thing in Ubuntu? The GUI search doesn't seem to accept wildcard characters, and I don't remember all of the file types I have, so it's not as simple as searching for "mp3". Many thanks!

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  • The Developers Conference 2012: Presentation about CEP & BAM

    - by Ricardo Ferreira
    This year I had the pleasure again of being one of the speakers in the TDC ("The Developers Conference") event. I have spoken in this event for three years from now. This year, the main theme of the SOA track was EDA ("Event-Driven Architecture") and I decided to delivery a comprehensive presentation about one of my preferred personal subjects: Real-time using Complex Event Processing. The theme of the presentation was "Business Intelligence in Real-time using CEP & BAM" and I would like to share here the presentation that I have done. The material is in Portuguese since was an Brazilian event that happened in São Paulo. Once my presentation has a lot of videos, I decided to share the material as a Youtube video, so you can pause, rewind and play again how many times you want it. I strongly recommend you that before starting watching the video, you change the video quality settings to 1080p in High Definition.

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  • Scrolling a WriteableBitmap

    - by Skoder
    I need to simulate my background scrolling but I want to avoid moving my actual image control. Instead, I'd like to use a WriteableBitmap and use a blitting method. What would be the way to simulate an image scrolling upwards? I've tried various things buy I can't seem to get my head around the logic: //X pos, Y pos, width, height Rect src = new Rect(0, scrollSpeed , 480, height); Rect dest = new Rect(0, 700 - scrollSpeed , 480, height); //destination rect, source WriteableBitmap, source Rect, blend mode wb.Blit(destRect, wbSource, srcRect, BlendMode.None); scrollSpeed += 5; if (scrollSpeed > 700) scrollSpeed = 0; If height is 10, the image is quite fuzzy and moreso if the height is 1. If the height is a taller, the image is clearer, but it only seems to do a one to one copy. How can I 'scroll' the image so that it looks like it's moving up in a continuous loop? (The height of the screen is 700).

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  • We're Subversion Geeks and we want to know the benefits of Mercurial

    - by Matt
    Having read I'm a Subversion geek, why should I consider or not consider Mercurial or Git or any other DVCS. I have a related follow up question. I read that question and read the recommended links and videos and I see the benefits but I don't see the overall mindshift people are talking about. Our team is of 8-10 developers that work on one large code base consisting of 60 projects. We use Subversion and have a main trunk. When a developer starts a new Fogbugz case they create a svn branch, do the work on the branch and when they're done they merge back to the trunk. Occasionally they may stay on the branch for an extended time and merge the trunk to the branch to pick up the changes. When I watched Linus talk about people creating a branch and never doing it again, that's not us at all. We create probably 50-100 branches a week without issue. The biggest challenge is the merging but we've gotten pretty good at that as well. I tend to merge by fogbugz case & checkin rather than the entire root of the branch. We never work remotely and we never make branches off of branches. If you're the only one working in that section of the code base then the merge to the trunk goes smoothly. If someone else had modified the same section of code then the merge can get messy and you might need to do some surgery. Conflicts are conflicts, I don't see how any system could get it right most of the time unless if was smart enough to understand the code. After creating a branch the following checkout of 60k+ files takes some time but that would be an issue with any source control system we'd use. Is there some benefit of any DVCS that we're not seeing that would be of great help to us?

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  • Dealing with institutionalized programmers.

    - by Singleton
    Some times programmers who work in a project for long time tend to get institutionalized. It is difficult to convince them with reasoning. Even if we manage to convince them they will be adamant to take suggestion on board. How do we handle the situation without developing friction in team? Institutionalized in terms of practices. I recently joined in a project where build &release process was made so complicated with unnecessary roadblocks. My suggestion was we can get rid of some of the development overheads(like filling few spreadsheets) just by integrating defect management and version controlling tools (both are IBM-Rational tools integration can be very easy and one-off effort). Also by using tools like Maven & Ant (project involves java and some COTS products) build & release can be simplified and reduce manual errors& intervention. I managed to convince and ready to put efforts for developing proof of concept. But the ‘Senior’ developer is not willing to take it on board. One reason could be the current process makes him valuable in team.

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  • How to update entity states and animations in a component-based game

    - by mivic
    I'm trying to design a component-based entity system for learning purposes (and later use on some games) and I'm having some troubles when it comes to updating entity states. I don't want to have an update() method inside the Component to prevent dependencies between Components. What I currently have in mind is that components hold data and systems update components. So, if I have a simple 2D game with some entities (e.g. player, enemy1, enemy 2) that have Transform, Movement, State, Animation and Rendering components I think I should have: A MovementSystem that moves all the Movement components and updates the State components And a RenderSystem that updates the Animation components (the animation component should have one animation (i.e. a set of frames/textures) for each state and updating it means selecting the animation corresponding to the current state (e.g. jumping, moving_left, etc), and updating the frame index). Then, the RenderSystem updates the Render components with the texture corresponding to the current frame of each entity's Animation and renders everything on screen. I've seen some implementations like Artemis framework, but I don't know how to solve this situation: Let's say that my game has the following entities. Each entity have a set of states and one animation for each state: player: "idle", "moving_right", "jumping" enemy1: "moving_up", "moving_down" enemy2: "moving_left", "moving_right" What are the most accepted approaches in order to update the current state of each entity? The only thing that I can think of is having separate systems for each group of entities and separate State and Animation components so I would have PlayerState, PlayerAnimation, Enemy1State, Enemy1Animation... PlayerMovementSystem, PlayerRenderingSystem... but I think this is a bad solution and breaks the purpose of having a component-based system. As you can see, I'm quite lost here, so I'd very much appreciate any help.

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  • Why can't I mount this partition?

    - by Mahmoud20070
    I have two hard disks (80 Giga ide and 500 Giga sata) and i installed Ubuntu 11.10 in hard disk 80 giga and give for him 20 gigabyte after that he saw all partition in two hard drivers until one I see it's health in gparted magic and he can see it but can't check it and this photo the problem is on partition sdb5 and I use this command to mount it from terminal and took me this although that this partition working very well in windows and Ubuntu could mount it before please give me any solution unless format or anything well delete my data because it's very important Before when I checked /dev/sdb5, it had errors - now all program didn't appear any errors unless fdisk -l All of my hard disks can be mounted except Partition D or /dev/sdb5. What can I do? I have tried to mount the partition with many different programs like Gparted, KDE Partition Manager, ntfs-3g from the terminal, and the mount command. All of them said something to the effect of: fuse: mount failed: Device or resource busy ...or... one or more block devices are holding /dev/sdb5 I installed Ubuntu 11.10 again today to see if anything had changed. The partition works fine under Windows.

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  • Where can I find design exercises to work on?

    - by Oak
    I feel it's important to continue practicing my problem-solving skills. Writing my own mini-projects is one way, but another is to try and solve problems posted online. It's easy to find interesting programming quizzes online that require applying clever algorithms to solve - Project Euler is one well-known example. However, in a lot of real-life projects the design of the software - especially in the initial phases - has a large impact and at later stages it cannot be tweaked as easily as plain algorithms. In order to improve these skills, I'm looking for any collection of design problems. When I say "design", I mean the abstract design of a software solution - for example what modules will there be and what are the dependencies between them, how data will flow in the program, what sort of data needs to be saved in the database, etc. Design problems are those problems that are critical to solve in the early stages of any project, but their solution is a whiteboard diagram without a single line of code. Of course these sort of problems do not have a single correct solution, but I'll be especially happy with any place that also displays pros and cons of the typical solutions that might be used to approach the problem.

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  • Ray Tracing concers: Efficient Data Structure and Photon Mapping

    - by Grieverheart
    I'm trying to build a simple ray tracer for specific target scenes. An example of such scene can be seen below. I'm concerned as to what accelerating data structure would be most efficient in this case since all objects are touching but on the other hand, the scene is uniform. The objects in my ray tracer are stored as a collection of triangles, thus I also have access to individual triangles. Also, when trying to find the bounding box of the scene, how should infinite planes be handled? Should one instead use the viewing frustum to calculate the bounding box? A few other questions I have are about photon mapping. I've read the original paper by Jensen and many more material. In the compact data structure for the photon they introduce, they store photon power as 4 chars, which from my understanding is 3 chars for color and 1 for flux. But I don't understand how 1 char is enough to store a flux of the order of 1/n, where n is the number of photons (I'm also a bit confused about flux vs power). The other question about photon mapping is, if it would be more efficient in my case to store photons per object (or even per Object's triangle) instead of using a balanced kd-tree. Also, same question about bounding box of the scene but for photon mapping. How should one find a bounding box from the pov of the light when infinite planes are involved?

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  • Is it possible to extend partition in which I have installed Ubuntu

    - by Santosh
    Before installing my current Ubuntu Oneiric Ocelot I was having 3 partitions on my hard drive (each in NTFS, and divided in 21GBs, 10GBs and 37GBs; approx 80GB). I put in the DVD in DVD-ROM and booted up with it. I was prompt whether to install Ubuntu side by current operating system (Windows 7) or totally remove all operating system. I choose to install side by the current operating system. In next screen I took one of my partition (the one which was of 37GB) and totally formatted it. Then created a ext4 file system of 10GBs on it (here 'it' means partition that was of 37GB, not whole HDD). While proceeding I was asked to make swap partition so I created another swap partition of 5GBs. I have Ubuntu installed, but now I am regretting about that 10GB, I should have done it more since I have much more space on my hard drive. And I have 22GBs of my hard drive useless (neither it is in ntfs nor ext4). I want to increase the size of ext4 partition in which I have installed my Ubuntu; from 10GB to something more.

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  • Ubuntu 12.04 Server ping gateway responds with destination host unreachable

    - by blckblttkd
    I consider myself fairly avid with Ubuntu and Linux, but this one has me stumped. I built up a Xen Server using Ubuntu 12.04 as the base operating system. It has multiple domUs running on it. My home network has a statically defined network where I got all the network connectivity going peachy. The server was moved to a permanent home this morning. So, the network configuration on the main system had to change. Again, another static network, but now I can't ping the upstream gateway from the host. As the VMs use this NIC over a bridge, they too are broken. Ping responds with "destination host unreachable." I simplified the networking down to a simple static network as seen below (no bridge or anything) just to get it to work. Here's the contents of my /etc/network/interfaces file: auto lo iface lo inet loopback auto eth0 iface eth0 inet static address 216.7.188.228 gateway 216.7.188.225 netmask 255.255.255.240 broadcast 216.7.188.255 network 216.7.188.0 dns-nameservers 8.8.8.8 8.8.4.4 Here's the contents of route -n 0.0.0.0 216.7.188.225 0.0.0.0 UG 100 0 0 eth0 216.7.188.224 0.0.0.0 255.255.255.240 U 0 0 0 eth0 And the results of pinging the gateway: PING 216.7.188.225 (216.7.188.225) 56(84) bytes of data. From 216.7.188.228 icmp_seq=1 Destination Host Unreachable From 216.7.188.228 icmp_seq=1 Destination Host Unreachable From 216.7.188.228 icmp_seq=1 Destination Host Unreachable Again, this worked in one network flawlessly (obviously with different parameters in the interfaces file). I did try using eth1 (as there are two NICS on the server (in case the MAC address got flipped on bootup). No success there. Yes, the cable is in the right port now :) Any thoughts? I appreciate the help!

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  • Inheritance vs composition in this example

    - by Gerenuk
    I'm wondering about the differences between inheritance and composition examined with concrete code relevant arguments. In particular my example was Inheritance: class Do: def do(self): self.doA() self.doB() def doA(self): pass def doB(self): pass class MyDo(Do): def doA(self): print("A") def doB(self): print("B") x=MyDo() vs Composition: class Do: def __init__(self, a, b): self.a=a self.b=b def do(self): self.a.do() self.b.do() x=Do(DoA(), DoB()) (Note for composition I'm missing code so it's not actually shorter) Can you name particular advantages of one or the other? I'm think of: composition is useful if you plan to reuse DoA() in another context inheritance seems easier; no additional references/variables/initialization method doA can access internal variable (be it a good or bad thing :) ) inheritance groups logic A and B together; even though you could equally introduce a grouped delegate object inheritance provides a preset class for the users; with composition you'd have to encapsule the initialization in a factory so that the user does have to assemble the logic and the skeleton ... Basically I'd like to examine the implications of inheritance vs composition. I heard often composition is prefered, but I'd like to understand that by example. Of course I can always start with one and refactor later to the other.

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  • Algorithm to measure how "diffused" 5,000 pennies are in an economy?

    - by makerofthings7
    Please allow me to use this example/metaphor to describe an algorithm I need. Objects There are 5 thousand pennies. There are 50 cups. There is a tracking history (Passport "stamp" etc) that is associated with each penny as it moves between cups. Definition I'll define a "highly diffused" penny as one that passes through many cups. A "poorly diffused" penny is one that either passes back and forth between 2 cups Question How can I objectively measure the diffusion of a penny as: The number of moves the penny has gone through The number of cups the penny has been in A unit of time (day, week, month) Why am I doing this? I want to detect if a cup is hoarding pennies. Resistance from bad actors Since hoarding is bad, the "bad cup" may simply solicit a partner and simply move pennies between each other. This will reduce the amount of time a coin isn't in transit, and would skew hoarding detection. A solution might be to detect if a cup (or set of cups) are common "partners" with each other, though I'm not sure how to think though this problem. Broad applicability Any assistance would be helpful, since I would think that this algorithm is common to Economics The study of migration patterns of animals, citizens of a country Other natural occurring phenomena ... and probably exists as a term or concept I'm unfamiliar with.

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  • Simple monitoring of a Raspberry Pi powered screen - Part 2

    - by Chris Houston
    If you have read my previous blog post Raspberry Pi entrance signed backed by Umbraco - Part 1 which describes how we used a Raspberry Pi to drive an Entrance sign for QV Offices you will have seen I mentioned a follow up post about monitoring the sign.As the sign is mounted in the entrance of the building on the ground floor and the reception is on the 1st floor, this meant that if there was a fault of any kind showing on the screen, the first person to see this was inevitably one of QV Offices' clients as they walked into the building.Although the QV Offices' team were able to check the Umbraco website address that the sign uses, this did not always mean that everything was working as expected. We noticed a couple of times that the sign had Wifi issues (it is now hard wired) and this caused the Chromium browser to render a 404 error when it tried to refresh the screen.The simple monitoring solutionWe added the following line to our refresh script, so that after the sign had been refreshed a screen shot of the Raspberry Pi would be taken:import -display :0 -window root ~/screenshot.jpgFinally we wrote a small Crontab task that ran on a QV Offices Mac that grabs this screen shot and saved it on the desktop, admittedly we have used a package that it not mega secure, but in reality this is an internal system that only runs an office sign, so we are not to concerned about it being hacked.*/5 * * * * /usr/local/bin/sshpass -p 'password' /usr/bin/scp [email protected]:screenshot.jpg Desktop/QVScreenShot.jpgAs the file icon updates, if the image changes, this gives a quick visual indication of the status of the sign, if for some reason the icon does not look correct the QV Offices administrator can just click on the file to see the exact image currently displayed on the sign.Sometimes a quick and easy solution is better than a more complex and expensive one.

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  • Is this a link scheme? If so, what to do? what problems can i face?

    - by guisasso
    I was asked to remodel a website, and decided to check its rank on alexa. Surprisingly, there are many, many different websites linking to it, none relevant. One particular thing about it is that none of these urls work, and they all display the exact same error when accessed, which to me is a very good indication that this is some sort of linking scheme. (besides the somewhat obvious names, it even says scheme in one of the urls !?) If so, how should i proceed about this website? What can i do if this is in fact a scheme, how can this hurt the website, what types of problems can i face, and what can i do about it? addurlnow . info dirlist15.addurlnow . info/Business___Economy/Services/page-12.html linkdirectory101 . info dirlist16.linkdirectory101 . info/Business___Economy/Services/page-15.html seonetblog . info dirlist52.seonetblog . info/Business___Economy/Affiliate_Schemes addurls . us dirlist21.addurls . us/Business___Economy/Services/page-10.html webdirectoriessite . info dirlist20.webdirectoriessite . info/Business___Economy/Services/page-6.html addurlstore . info dirlist10.addurlstore . info/business___economy/services/page-14.html ukwebdirectorys . info dirlist21.ukwebdirectorys . info/Business___Economy/Services/page-13.html

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