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• Low hanging fruit where "a sufficiently smart compiler" is needed to get us back to Moore's Law?

  - by jamie

  Paul Graham argues that: It would be great if a startup could give us something of the old Moore's Law back, by writing software that could make a large number of CPUs look to the developer like one very fast CPU. ... The most ambitious is to try to do it automatically: to write a compiler that will parallelize our code for us. There's a name for this compiler, the sufficiently smart compiler, and it is a byword for impossibility. But is it really impossible? Can someone provide a concrete example where a paralellizing compiler would solve a pain point? Web-apps don't appear to be a problem: just run a bunch of Node processes. Real-time raytracing isn't a problem: the programmers are writing multi-threaded, SIMD assembly language quite happily (indeed, some might complain if we make it easier!). The holy grail is to be able to accelerate any program, be it MySQL, Garage Band, or Quicken. I'm looking for a middle ground: is there a real-world problem that you have experienced where a "smart-enough" compiler would have provided a real benefit, i.e that someone would pay for?

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• Questions for Oracle GlassFish and Middleware Executives

  - by arungupta

  GlassFish Community Event is planned, as part of JavaOne, on Sep 30, 2012. If you are involved in the GlassFish community, this is a perfect opportunity to engage with the Oracle GlassFish Team. Agenda 11:00 - 11:05: Introduction 11:05 - 11:30: Roadmap and Community Updates 11:30 - 12:15: Q&A with Executive Speaker Panel from Oracle and the GlassFish Team 12:15 - 01:00: Customer Testimonials Location: Moscone West, Room 2005 One of the highlights of the event is a speaker panel with executives from Oracle GlassFish and Middleware. This will be your chance to ask tough questions and expect a honest and frank answer from them. If you are attending JavaOne, then you can register for the Community Event and ask the questions in person. However, if are you are not attending the conference then we would still like give you an option to ask your questions. Are you excited, nervous, curious, confused, thrilled about the future of Java EE, GlassFish, and in general about middleware at Oracle ? This is your chance to leave a comment on this blog with your question. We'll pick some of the questions and ask them for you. And then post a response after the conference. Have you registered for JavaOne ?

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• Wanna be a Rock Star?

  - by lydia.smyers

  We just launched the Oracle PartnerNetwork Specialized Partner Premier site, a new site specifically targeted to customers, partners and Oracle employees. The site is all about "You", our partners, who have achieved one or more of the over 50 specializations available today. Specialized. Recognized. Preferred. Yes, that's you - the chosen vendors. And just for you we're going to produce videos starring "You" and your stories which will available everywhere Oracle customers, partners and employees are. Sundance may be over but we're just getting started. This is just one of the new benefits, want more? Industry Analyst Firm, IDC offers kudos and says Oracle's premier "approach to putting top partners front and center with customers and prospects" has "raised the bar." We'll be advertising this site all over Oracle's major websites to give our specialized partners their deserved recognition. Bring on the buttered popcorn! Lights! Camera! What are you waiting for? http://www.oracle.com/specialized. Need to get specialized? Check out how: http://www.oracle.com/partners/en/opn-program/specialize/index.html

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• Help to calculate hours and minutes between two time periods in Excel 2007

  - by Mestika

  Hi, I’m working on a very simple timesheet for my work in Excel 2007 but have ran into trouble about calculate the hours and minutes between two time periods. I have a field: timestart which could be for example: 08:30 Then I have a field timestop which could be for example: 12:30 I can easy calculate the result myself which is 4 hours but how do I create a “total” table all the way down the cell that calculate the hours spend on each entry? I’ve tried to play around with the time settings but it just give me wrong numbers each time. Sincerely Mestika

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• Introducing Programming To a Mathematician

  - by ell

  I currently am a programmer, I'm almost 16 years of age and have pretty much narrowed my careers down to something involving a Computer Science degree or Electrical Engineering degree (I know they are quite different but this question is about my friend) but my friend isn't so sure. He is very interested in maths and is very good at it and I think he would enjoy programming but he isn't willing to try it (edit he is willing to try but has never done before). Can anyone give me an suggestions for a language or tool that he could dabble in programming (at a reasonably basic level I assume) to solve maths problems or involve some kind of maths. As I say he enjoys maths a lot but I think he would enjoy programming, the problem is I don't want him to be put off by the stuff that isn't relevant at introductory levels such as memory allocation et al. I know that is very important but the point is that I want him to learn a bit of programming with maths then hopefully if he is interested enough he can start learning programming as programming. Thanks in advance, ell. Edit: Its not that he's completely uninterested - more that he hasn't actively explored the area before, maybe because he isn't informed about it. I wouldn't want to force him to do something he doesn't want to, I see this as more of a little push so that he can learn about programming. If he doesn't like it - fair enough, I can't control that and don't want to but if he turns out to enjoy it - this push will have been the right thing.

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• Can an LDAP query on AD provide the netbios domain name for a single account when using the Global Catalog?

  - by Kirk Liemohn

  I am using ADSI Edit to look at LDAP properties of a single user account in AD. I see properties such as userPrincipalName, but I do not see one for the fully qualified domain name (FQDN) or the netbios domain name. We will be setting up the Global Catalog (GC) to give us LDAP access to multiple domains and through configuration in an application we map LDAP properties to user profile properties within the application. With typical AD the FQDN and netbios domain name are the same for all users, but with the GC involved we need this additional information. We really only need the netbios domain name (the FQDN is not good enough). Maybe there is a LDAP query that can be done to request this information from a more top-level object in AD?

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• How to recover a server from a tar file

  - by Mitch

  In moodle the LMS you can export courses, as a tar.gz, some one said they were going to give me such a thing. I was suprised by the 6 gb size. I was even more suprised when I extracted it, and found the root directory to be the root of the server. The person giving me the course instead of exporting must have just tarred the entire server!! How should I go about recovering this? Is there anyway to start this up in a virtual machine? I have a whole linux server, what to do? I could probably just hand pick the data files I need, but how to access a mysql database with out running mysql? I am so stumped!

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• Could not open the dk file

  - by IgnacioRivera

  I dont know what I have done, but it is over a month now that I can not open my virtual machine, I'm using a MacBookPro with Fusion 2.0.6. I recently upgraded my system to Snow Leopard. but it was working fine. Now I get a message that says" File not found: Windox XP. vmdk. I went to all my backups and when I unpack the files in the virtual machine, there is not such a file. the only file that I can see that may contents the data is the .vmem file that show to have 1.2 GB of data. I have tryed and tryed to contact VMware support but it has become an impossible task, If theres someone that could give me some ideas on how to recover my virtual machine????

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• Emacs and Dvorak

  - by Nate

  I'm a dvorak typist and a vim power user, and I'm just starting to do some heavy development in a LISP and I figured I'd give emacs a shot. The trouble is, some of the commands are awkward on dvorak. How do I swap commands around? At the moment I'd like to make C-k act like C-x, C-t act like C-k, and C-x at like C-t, but I'm sure that I'll want to swap more things around as I learn what key combinations I actually use. I know that there are some emacs dvorak modes, but most of them remap all of the commands such that you can keep the qwerty bindings: however, I don't know the qwerty bindings, and most of the bindings are mnemonic, so I'd rather not use any of those. Thanks.

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• How do you avoid jumping to a solution when under pressure? [closed]

  - by GlenPeterson

  When under a particularly strict programming deadline (like an hour), if I panic at all, my tendency is to jump into coding without a real plan and hope I figure it out as I go along. Given enough time, this can work, but in an interview it's been pretty unsuccessful, if not downright counter-productive. I'm not always comfortable sitting there thinking while the clock ticks away. Is there a checklist or are there techniques to recognize when you understand the problem well enough to start coding? Maybe don't touch the keyboard for the first 5-10 minutes of the problem? At what point do you give up and code a brute-force solution with the hope of reasoning out a better solution later? A related follow-up question might be, "How do you ensure that you are solving the right problem?" Or "When is it most productive to think and design more vs. code some experiments to and figure out the design later?" EDIT: One close vote already, but I'm not sure why. I wrote this in the first person, but I doubt I'm the only programmer to ever choke in an interview. Here is a list of techniques for taking a math test and another for taking an oral exam. Maybe I'm not expressing myself well, but I'm asking if there is a similar list of techniques for handling a programming problem under pressure?

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• DNS resolution not working on Browsers but on Shell

  - by Shyam Sunder Verma

  Running dig/ping on any domain, give me correct ip. When I try to browse google.com in browser it does not work. When I pick the IP (via ping) and use it in browser, website open via IP fine. But further work does not work, because of name resolution problem. DO NOT works fine on : Ubuntu 9.10 installed in Virtual Box over Windows. Ubuntu 10.10 installed in Virtual Box over Windows. Ubuntu 9.10 installed on laptop. But Internet works fine on windows vista installed on laptop.

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• Roadmap for Thinktecture IdentityServer

  - by Your DisplayName here!

  I got asked today if I could publish a roadmap for thinktecture IdentityServer (idrsv in short). Well – I got a lot of feedback after B1 and one of the biggest points here was the data access layer. So I made two changes: I moved to configuration database access code to EF 4.1 code first. That makes it much easier to change the underlying database. So it is now just a matter of changing the connection string to use real SQL Server instead of SQL Compact. Important when you plan to do scale out. I included the ASP.NET Universal Providers in the download. This adds official support for SQL Azure, SQL Server and SQL Compact for the membership, roles and profile features. Unfortunately the Universal Provider use a different schema than the original ASP.NET providers (that sucks btw!) – so I made them optional. If you want to use them go to web.config and uncomment the new provider. Then there are some other small changes: The relying party registration entries now have added fields to add extra data that you want to couple with the RP. One use case could be to give the UI a hint how the login experience should look like per RP. This allows to have a different look and feel for different relying parties. I also included a small helper API that you can use to retrieve the RP record based on the incoming WS-Federation query string. WS-Federation single sign out is now conforming to the spec. I made certificate based endpoint identities for SSL endpoints optional. This caused some problems with configuration and versioning of existing clients. I hope I can release the RC in the next days. If there are no major issues, there will be RTM very soon!

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• Importing video from a videotape recorded on Soy Handycam

  - by Akhil Langer

  I used Windows Movie Maker to import videos from a videotape recorded on Sony handycam. I imported the video in .avi format( as it was giving the best video quality), but the size of the video is very large (8GB for just 1 hour). Moreover, it takes a lot of time to import the video in Windows Movie Maker (approx. 2.5 hrs. for 1 hour video). Please suggest some other software which is more robust in the sense that it can give good quality video in lesser size and also it should be able to import the video quickly(as I have to import many video cassettes).

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• Packing jar files into library jar files

  - by Hillel

  Firstly, this question is not about packing a simple jar file (e.g. lwjgl) into a runnable jar file. I know how to do this using JarSplice. So if I have a game which uses JInput, I will pack my game jar and jinput.jar using JarSplice and enter the natives in the process. The problem arises when I want to create a custom library that uses JInput, and then pack that into my games. See, the whole idea of writing a game library is that I don't ever have to even copy code like the wrapper I wrote for JInput Controller, and I always have a definitive version inside a library jar. Basically what I wanna do is create a jar file of my library, pack jinput.jar into it using JarSplice, possibly with the natives as well, and then when I want to export a jar of my game, I either export it automatically through Eclipse with the library jar, or, if that doesn't work, use JarSplice. I've tried several solutions, and nothing works. When I try to pack the game jar and the library jar using JarSplice, I get an error saying that there's either duplicate .project or .classpath. When I try to export my game through Eclipse with the library jar, it won't run (which is to be expected), but then, if I try to attach the natives with JarSplice, it doesn't give me any errors but the jar doesn't run. I'm not expecting anyone to solve this, but if anyone has an idea, something that will allow me to never look at the Gamepad code ever again, that would be awesome. I don't care if I have to package my library jar using JarSplice 5 times, and then do the same with the game jar, as long as it works. Otherwise I'll just have to copy the Gamepad class into every project alongside the library jar. :(

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• CodePlex Daily Summary for Saturday, August 25, 2012

  CodePlex Daily Summary for Saturday, August 25, 2012Popular ReleasesVisual Studio Team Foundation Server Branching and Merging Guide: v2 - Visual Studio 2012: Welcome to the Branching and Merging Guide Quality-Bar Details Documentation has been reviewed by Visual Studio ALM Rangers Documentation has been through an independent technical review Documentation has been reviewed by the quality and recording team All critical bugs have been resolved Known Issues / Bugs Spelling, grammar and content revisions are in progress. Hotfix will be published.Community TFS Build Extensions: August 2012: The August 2012 release contains VS2010 Activities(target .NET 4.0) VS2012 Activities (target .NET 4.5) Community TFS Build Manager VS2010 Community TFS Build Manager VS2012 Both the Community TFS Build Managers can also be found in the Visual Studio Gallery here where updates will first become available. Please note that we only intend to fix major bugs in the 2010 version and will concentrate our efforts on the 2012 version of the TFS Build Manager. At a high level, the following I...Microsoft Ajax Minifier: Microsoft Ajax Minifier 4.62: Fix for issue #18525 - escaped characters in CSS identifiers get double-escaped if the character immediately after the backslash is not normally allowed in an identifier. fixed symbol problem with nuget package. 4.62 should have nuget symbols available again.nopCommerce. Open source shopping cart (ASP.NET MVC): nopcommerce 2.65: As some of you may know we were planning to release version 2.70 much later (the end of September). But today we have to release this intermediate version (2.65). It fixes a critical issue caused by a third-party assembly when running nopCommerce on a server with .NET 4.5 installed. No major features have been introduced with this release as our development efforts were focused on further enhancements and fixing bugs. To see the full list of fixes and changes please visit the release notes p...MyRouter (Virtual WiFi Router): MyRouter 1.2.9: . Fix: Some missing changes for fixing the window subclassing crash. · Fix: fixed bug when Run MyRouter at the first Time. · Fix: Log File · Fix: improve performance speed application · fix: solve some Exception.ZXing.Net: ZXing.Net 0.8.0.0: sync with rev. 2393 of the java version improved API, direct support for multiple barcode decoding, wrapper for barcode generating many other improvements and fixes encoder and decoder command line clients demo client for emguCV dev documentation startedScintillaNET: ScintillaNET 2.5.1: This release has been built from the 2.5 branch. Issues closed: Issue # Title 32524 32524 32550 32550 32552 32552 25148 25148 32449 32449 32551 32551 32711 32711 MFCMAPI: August 2012 Release: Build: 15.0.0.1035 Full release notes at SGriffin's blog. If you just want to run the MFCMAPI or MrMAPI, get the executables. If you want to debug them, get the symbol files and the source. The 64 bit builds will only work on a machine with Outlook 2010 64 bit installed. All other machines should use the 32 bit builds, regardless of the operating system. Facebook BadgeSQL Monitor - managing sql server performance: SQL Monitor 4.2 beta 1: 1. fixed a few bugs 2. changed some column names to more readable text.Nito AsyncEx: 0.9.1: Identical to the primary NuGet package. Please note that this release has several breaking changes! Most importantly, VS2010 and the Async CTP are no longer supported. VS2010 users should continue to use 0.8.0; VS2012 users should use the latest version. Other changes: TFS/ICancelableAsync has been removed. It can be added back if there is sufficient demand. SL4 and WP7 are no longer supported. The dependency on Async CTP has been changed to dependencies on the Async Targeting Pack and...Snippets Generator for SQL Server 2012: Snippets Generator v1.0: This is the first stable release of Snippets Generator v1.0. All the reported issues have been resolved. Thank you for your feedback and enjoy the tool!BrowseByURL: BrowseByURL 1.0.1: Now also for windows XPThe LogNut logging library and facilities: Release 0.1: This is the API help-file document in .chm format..NET Winforms Gantt Chart Control: Gantt Chart Control: Full C# source download. DLL project with Example Application to show how the Control can be used in Winforms.Document.Editor: 2013.2: Whats new for Document.Editor 2013.2: New save as Html document Improved Traslate support Minor Bug Fix's, improvements and speed upsPulse: Pulse Beta 5: Whats new in this release? Well to start with we now have Wallbase.cc Authentication! so you can access favorites or NSFW. This version requires .NET 4.0, you probably already have it, but if you don't it's a free and easy download from Microsoft. Pulse can bet set to start on Windows startup now too. The Wallpaper setter has settings now, so you can change the background color of the desktop and the Picture Position (Tile/Center/Fill/etc...) I've switched to Windows Forms instead of WPF...Metro Paint: Metro Paint: Download it now , don't forget to give feedback to me at maitreyavyas@live.com or at my facebook page fb.com/maitreyavyas , Hope you enjoy it.MiniTwitter: 1.80: MiniTwitter 1.80 ???? ?? .NET Framework 4.5 ?????? ?? .NET Framework 4.5 ????????????? "&" ??????????????????? ???????????????????????? 2 ??????????? ReTweet ?????????????????、In reply to ?????????????? URL ???????????? ??????????????????????????????Droid Explorer: Droid Explorer 0.8.8.6 Beta: Device images are now pulled from DroidExplorer Cloud Service refined some issues with the usage statistics Added a method to get the first available value from a list of property names DroidExplorer.Configuration no longer depends on DroidExplorer.Core.UI (it is actually the other way now) fix to the bootstraper to only try to delete the SDK if it is a "local" sdk, not an existing. no longer support the "local" sdk, you must now select an existing SDK checks for sdk if it was ins...Path Copy Copy: 11.0.1: Bugfix release that corrects the following issue: 11365 If you are using Path Copy Copy in a network environment and use the UNC path commands, it is recommended that you upgrade to this version.New ProjectsBeginning Visual C++ 2010: For Educational use onlyChien Fidele - Education Canine: Accompagnons un educateur canin comportementaliste vers son premier site web. http://www.chienfidele.fr "Votre Chien Fidèle."CodeProject App: An Android app for browsing/using CodeProject.com. This app includes quite a few features already so take a look! It's fast and easy to use! Even uses caching!FOBTV.Web: FOBTV.WebJunkBox: This is a summaryloveyou: loveyouNDatabase - C# Lightweight Object Database: This project creates lightweight object database dedicated for .NET. The purpose of this project is to give a developer possibility to persist any object in C#.Online Shopping Website: MVC 4 Project For Online Shopping Website.Raze The Game: Raze is an indie game created by Team R.A.Z.E.repository of CodePlex: CodePlex, just for publicationsafsafd: sadfsafSCCM , AD & Powershell customization/scripts/WebServices: Project with customization for managing your infrastructure including Custom Webservices for SCCM , Active Directory Scripts (powershell) , Web FrontEndsSilverBullet: SilverBullet is an open-source implementation of Microsoft's XNA Framework, written on top of SilverLight.Some DotNetNuke® Hacks: This project is a container for some custom hacks, modules and other modifications to DotNetNuke® which doesn't fit into other projects.TempleApplication: Its a Temple Services Application, User of temple use temple services and their log is maintained transportadora: ProjetoUmbraco Development: This project is dedicated to all the CMS programmer and beginner so that they can help each other.Visual Studio Extension - Gated CheckIn: Its a visual studio 2010 plugin for Gated Check in. Currently only TFS 2010 is supported as Source Control provider.WF Terminator: SharePoint 2010 Tool for Finding & Terminating Workflows. Please see the Home Page for more information.WindowPhone Calendar Control: It is a simple windowsphone calendar control. I hope you like it.WinFormWeatherNet: It is a simple library that gives WinForm weather forecast through the Google Weather Service, in the future contain Yahoo services and create libraries for WPF???? ???: ??? ??/?? ??????

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• A lot has happened since last post!!!!!!!!!

  - by Ratman21

  And I mean a lot! First off had two interviews (one was selling insurance) and other installing cable. I have more hope for the cable one. Getting more emails from my job search engines (having problems with going through them and applying for those jobs, I know I can do). It seems the more I apply to, the more job emails pop up in my in box. But at the same time I am fighting feelings of worthlessness (18 months and no job). It is putting a strain on my marriage (We had had blow out over a broken drinking glass since I last posted).     But, at the same time, I am fighting mad about (a figure of speech, really) not having a job. Look just because I am over 55 and have gray hair. It does not mean, my brain is dead or I can not longer trouble shoot a router or circuit or LAN issue. Or that I can do “IT” work at all. And I could prove this if; some one would give me at job. Come on try me for 90 days at min. wage.   I know you will end up keeping me (hope fully at normal pay) around. Is any one hearing me…come on take up the challenge!

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• Batch OCR for many PDF files (not already OCRed) ?

  - by David

  Hello, I use Google Desktop Search (I am on Vista) and not all my PDF files are recognized in my archive folder. It is normal as "PDF files that contain scanned images" are not indexed (http://desktop.google.com/support/bin/answer.py?hl=en&answer=90651) So I would like to OCR many of my PDF files that are not already OCRed. My goal : I give the program a folder and it search alone in the subfolders the PDF files that need to be converted into PDF-OCRed files. Note: In the past, if a PDF file was password protected, I removed the password with another batch (paying) tool: verypdf.com "pwdremover" Any (not too much expensive) idea ? I already tried : Finereader 6 pro on xp at the time, but there was no batch processor included... Paperfile paperfile.net which uses Tesseract code.google.com/p/tesseract-ocr/. But the OCR is only PDF to text, not PDF to PDF! There is also another project code.google.com/p/ocropus Thanks in advance ;)

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• IP telephony open source systems

  - by danke

  I'm trying to pick an IP telephony technology to learn. I heard of Asterisk, trixbox, freePBX, and my head was already spinning being not sure what to learn. Then I came across this article listing some more like Kamailio, Yate, CallWeaver, FreeSWITCH, SipXecs and now my head REALLY is spinning http://www.cio.com.au/article/323016/five_open_source_ip_telephony_projects_watch . Can someone give me a run down of how all these technologies tie together? What is the trend now, because I'd like to start learning. Note: Anyone please re-tag this question if you know better, because I'm new to this field and not sure about the best tags.

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• What is the rationale behind Apache Jena's *everything is an interface if possible* design philosophy?

  - by David Cowden

  If you are familiar with the Java RDF and OWL engine Jena, then you have run across their philosophy that everything should be specified as an interface when possible. This means that a Resource, Statement, RDFNode, Property, and even the RDF Model, etc., are, contrary to what you might first think, Interfaces instead of concrete classes. This leads to the use of Factories quite often. Since you can't instantiate a Property or Model, you must have something else do it for you --the Factory design pattern. My question, then, is, what is the reasoning behind using this pattern as opposed to a traditional class hierarchy system? It is often perfectly viable to use either one. For example, if I want a memory backed Model instead of a database-backed Model I could just instantiate those classes, I don't need ask a Factory to give me one. As an aside, I'm in the process of writing a library for manipulating Pearltrees data, which is exported from their website in the form of an RDF/XML document. As I write this library, I have many options for defining the relationships present in the Peartrees data. What is nice about the Pearltrees data is that it has a very logical class system: A tree is made up of pearls, which can be either Page, Reference, Alias, or Root pearls. My question comes from trying to figure out if I should adopt the Jena philosophy in my library which uses Jena, or if I should disregard it, pick my own design philosophy, and stick with it.

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• Is there a canonical book for learning Java as an experienced developer?

  - by Steven Elliott Jr

  I have been a .NET developer now for about the past 5/6 years give or take. I have never done any professional Java development and the last time I really touched it was probably back in college. I have been toying with the Scala language a little bit but nothing serious. Recently, I've been offered an opportunity to do some pretty cool work, but using Java instead of .NET. I think I can get by alright with my current skill set, meaning I already know how to program well and am familiar with languages such as C# and C++, etc. So, the syntax and all that language stuff are really not a problem. What I need is a really good reference book and a book about how to think in Java. Each language/Framework/Stack tries to address things a certain way and I'm sure Java is no different. What are some great Java books that you simply can't live without? Are there any books that talk about the most important parts of Java that must be understood before all else? As a side note, I will be doing mostly Java web development. Not really 100% on what types of stuff they are using for persistence, framework, server, etc.

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• IIS: redirect to a webpage if authentication fails

  - by DrStalker

  We have an IIS site (MOSS 2007) that uses Windows Authentication. When a user that has forgotten their password tries to login the servers keeps sending 401 requests. This means on IE the user gets three prompts before IE displays a blank page, on Firefox the user is prompted over and over until they give up. We would like to change the behavior so if a user fails to login three times in a row we send them a redirect to a different site, instead of another 401 Forms authentication is not an option; the site has to remain on windows authentication to allow for SSO capabilities and certain sharepoint functions. Is there any way to tweak the IIS behavior to do this?

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• Can someone explain the "use-cases" for the default munin graphs?

  - by exhuma

  When installing munin, it activates a default set of plugins (at least on ubuntu). Alternatively, you can simply run munin-node-configure to figure out which plugins are supported on your system. Most of these plugins plot straight-forward data. My question is not to explain the nature of the data (well... maybe for some) but what is it that you look for in these graphs? It is easy to install munin and see fancy graphs. But having the graphs and not being able to "read" them renders them totally useless. I am going to list standard plugins which are enabled by default on my system. So it's going to be a long list. For completeness, I am also going to list plugins which I think to understand and give a short explanation as to what I think it's used for. Pleas correct if I am wrong with any of them. So let me split this questions in three parts: Plugins where I don't even understand the data Plugins where I understand the data but don't know what I should look out for Plugins which I think to understand Plugins where I don't even understand the data These may contain questions that are not necessarily aimed at munin alone. Not understanding the data usually mean a gap in fundamental knowledge on operating systems/hardware.... ;) Feel free to respond with a "giyf" answer. These are plugins where I can only guess what's going on... I hardly want to look at these "guessing"... Disk IOs per device (IOs/second)What's an IO. I know it stands for input/output. But that's as far as it goes. Disk latency per device (Average IO wait)Not a clue what an "IO wait" is... IO Service TimeThis one is a huge mess, and it's near impossible to see something in the graph at all. Plugins where I understand the data but don't know what I should look out for IOStat (blocks/second read/written)I assume, the thing to look out for in here are spikes? Which would mean that the device is in heavy use? Available entropy (bytes)I assume that this is important for random number generation? Why would I graph this? So far the value has always been near constant. VMStat (running/I/O sleep processes)What's the difference between this one and the "processes" graph? Both show running/sleeping processes, whereas the "Processes" graph seems to have more details. Disk throughput per device (bytes/second read/written) What's thedifference between this one and the "IOStat" graph? inode table usageWhat should I look for in this graph? Plugins which I think to understand I'll be guessing some things here... correct me if I am wrong. Disk usage in percent (percent)How much disk space is used/remaining. As this is approaching 100%, you should consider cleaning up or extend the partition. This is extremely important for the root partition. Firewall Throughput (packets/second)The number of packets passing through the firewall. If this is spiking for a longer period of time, it could be a sign of a DOS attack (or we are simply recieving a large file). It can also give you an idea about your firewall performance. If it's levelling out and you need more "power" you should consider load balancing. If it's levelling out and see a correlation with your CPU load, it could also mean that your hardware is not fast enough. Correlations with disk usage could point to excessive LOG targets in you FW config. eth0 errors (packets in/out)Network errors. If this value is increasing, it could be a sign of faulty hardware. eth0 traffic (bits/second in/out)Raw network traffic. This should correlate with Firewall throughput. number of threadsAn ever-increasing value might point to a process not properly closing threads. Investigate! processesBreakdown of active processes (including sleeping). A quick spike in here might point to a fork-bomb. A slowly, but ever-increasing value might point to an application spawning sub-processes but not properly closing them. Investigate using ps faux. process priorityThis shows the distribution of process priorities. Having only high-priority processes is not of much use. Consider de-prioritizing some. cpu usageFairly straight-forward. If this is spiking, you may have an attack going on, or a process is hogging the CPU. Idf it's slowly increasing and approaching max in normal operations, you should consider upgrading your hardware (or load-balancing). file table usageNumber of actively open files. If this is reaching max, you may have a process opening, but not properly releasing files. load averageShows an summarized value for the system load. Should correlate with CPU usage. Increasing values can come from a number of sources. Look for correlations with other graphs. memory usageA graphical representation of you memory. As long as you have a lot of unused+cache+buffers you are fine. swap in/outShows the activity on your swap partition. This should always be 0. If you see activity on this, you should add more memory to your machine!

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• how to wrap the command1 return strings with single/double quotation marks (\'or\") to feed to the next command2?

  - by infantcoder

  For example, I want to use mplayer to play the music of several dirs, type like this in bash: $find './l_music/La Scala Concert 03 03 03' './l_music/Echoes The Einaudi Collection' './l_music/Ludovico Einaudi - The Royal Albert Hall Concert [2 CD] (2010)' -name '*.mp3' | xargs mplayer Well, You Know, the find command return path, which dir and file always have space, the pipe right command mplayer do not accept those mp3 path. I think that if wrap the find return strings with single/double quotation marks (\'or\") to feed to mplayer, the problem will be solved. But how can I do to solve the problem just use bash command, do not use bash or perl scripts, while can give me one perl line command use Perl Command-Line Options.

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• What to use as a file server with a web interface and user management on MAMP

  - by Timo

  I want to set up file/photo sharing for a largish group of friends and family. Flickr, Picasa etc. are not optimal solutions because setting up accounts, sharing albums and navigating privacy settings is going to be overwhelming for some of the people. I just want to be able to give people a URL, a username, and password and have it be easy peasy. I want something very simple and easy to use (for the user) like MyTunesRSS. I've looked at a complete "social" solution like Elgg but that feels like using a cadillac to kill a fly. I only need: User management Simple upload / download of files Plug-into-MAMP ease of setup is a bonus Search / metadata / tags / commenting not necessary but also earns bonus points Free / cheap licence What would you recommend?

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• DNS records on website.. What are they for?

  - by Blake Nic

  Recently we had to get some ddos protection for our website because of the large attacks we were seeing after getting a bit of popularity. We handed over our domain and hosting information to our ddos protection provider. It worked perfectly but I have a question. On our DNS records we have the Host and Answer and Type. The Host has our domain name there. The answer is this: SOMETEXTXXXX.dv.googlehosted.com. And when i copy and paste it into my browser it gives me a 404 error. But our website still loads and functions as it should. I don't understand why it would need this? I asked them about this and they said it is a method for ddos protection and the other IPs are the reverse proxy (the other ips give a 404 error too). Can anyone expand on this more please. How does all this tie in together and make the internet browser know where to point the person with all these reverse proxies and stuff I don't understand. Thank you. Here is an image for reference: http://i.stack.imgur.com/qo5QO.png

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