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  • Unable to complete ubuntu installation

    - by Hugh Levinson
    I am not a computer expert and have no programming experience. I have downloaded Ubuntu 12.04 from the website using the Windows installer onto an admittedly old Toshiba Satellite Pro laptop. The download seemed to be fine. When I try to startup the laptop and select Ubuntu I get a long series of messages starting: "error: couldn't read file [0.7392640 Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block (0,0)" I have seen other entries on this messageboard with similar questions but to be honest, I can't follow the answers, which presume more knowledge than I have. I would be extremely grateful if anyone could suggest a solution.

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  • Out Of disk, but still boots

    - by LinuxPCplus
    I have a HP Compaq nx6310 notebook wth 4gb memory & a new 250gb hdd. After installing Ubuntu 12.04, i got an "out of disk" error & was unable to boot. I rebooted in live, instaled & ran Boot Repair then rebooted. Grub menu loaded fine, followed by "out of disk.....press any key to continue". I pressed a key & Ubuntu booted, a bit slow but still booted. So here are my questions: 1- Since Ubuntu DOES boot, should I just leave it alone? 2- If I need to fix this, HOW do I do it? 3- What causes this error? $wolf@lpc-1:~$ df -h Filesystem Size Used Avail Use% Mounted on /dev/sda1 230G 9.1G 209G 5% / udev 1.6G 12K 1.6G 1% /dev tmpfs 655M 868K 654M 1% /run none 5.0M 0 5.0M 0% /run/lock none 1.6G 260K 1.6G 1% /run/shm wolf@lpc-1:~$

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  • Access to the Technology Software

    - by rituchhibber
    The Technology Program software is available to Oracle partners, free of charge, for demonstration and development purposes according to the terms of the OPN Agreement. Instructions for Ordering Software: Download software via the Oracle Software Delivery Cloud website. Downloads are available in most countries. To determine if downloads are available within your country click on the Download software link. Request a physical shipment of the software by downloading and completing the Development and Demonstration Ordering Document (XLS). Should you have additional questions or need assistance in completing the ordering document, please contact your local Partner Business Center. Incomplete orders will not be processed.

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  • In-app paymnt methods

    - by user212228
    I'm interested in developing for Ubuntu (mostly phones) and I can't seem to find the guidelines on app publishing, will apps only work through the ubuntu software center, or can users download and install an app from a website like is possible with an android apk? Also, are there any rules regarding in-app purchase methods, (I hope the minimum price here isn't $2.99 in-app as well or I'm not going to even bother developing for Ubuntu and will just stick with Android) Google for example, requires that in-app purchases go through their servers so that it isn't possible to use other funding methods at least for play store published apps. My main questions here are: Would it be possible to release an app for ubuntu touch that accepted bitcoin, paypal, or other methods for in-app purchases? If not, would it be possible to release apps through a personal website or 3rd party app market that could use alternative payment methods?

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  • Oracle OpenWorld 2012 Tweet Meet!

    - by jgelhaus
    OTN Tweet MeetDo you Tweet? What’s your handle? Ever wanted to meet the faces behind all the tweets from Oracle, partners, and fellow customers? Grab a @__ nametag and join in! Tuesday, October 2, from 4:30 p.m. to 6:30 p.m. at the OTN lounge (you know, that big RED tent between Moscone North and South)!  Come and mingle with fellow tweeters. In addition to great company, Oracle Database experts will be on hand to answer questions.

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  • Is windows a "second class citizen" in the django community?

    - by Daniel Upton
    I'm currently doing R&D for a web application which we plan to host ourselves initially and then allow customers to self host. My task has been evaluating web frameworks to see which would give us the biggest productivity initially and ease of maintence while also allowing us to easily support deployment to customer controlled environments. Our team has experience with ASP.NET (MVC and Webforms) and Ruby on Rails. Our experience with rails is that windows deployment is a very taboo subject and any questions on IRC or SO are met with knee jerk "why not linux" responses.. However in this case our target market may be running windows or linux servers. Is this also the case in django land? Is it possible with rubbish performance? Is it possible with lost of pain? Is it seen as reasonable and not treated as a completely stupid idea for not wanting to run linux?

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  • DevConnections: Day 1 Recap And Spin The Wheel Game

    Microsoft officially launched Visual Studio 2010 yesterday and the DevExpress booth was packed with attendees. Most attendees had product questions about current and future products. Some came by just to show their DevExpress love (thank you!). And some were also there to spin the wheel: DXperience v2010.1 Beta Release Date Our team is hard at work to get the DXperience v2010.1 beta out. DXperience customers should see the beta available in your client center account later this week or early...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • Links to C++ documentation

    - by Daniel Moth
    After a recent talk I gave on C++ AMP, one attendee was complaining that they were not familiar with lambdas and another found templates hard to parse. In case you are in the same boat, I thought I'd gather some essential reading material for you (also gives me one link to use in the future for referring people to ;-) Lambdas are available (in some shape or form) in all modern languages, so do yourself a favor and learn about them: Lambda Expressions in C++ (and also syntax and examples) Watch Herb Sutter's full length session on lambdas at PDC 2010 Templates, have been around in modern languages for even longer than lambdas (e.g. Generics in .NET), so again go dive in: Templates topic with full table of contents linking to subtopics In fact, why don't you refresh your knowledge and read the entire msdn C++ Language Reference – that's what I am doing! If you are looking to keep up to date with what is happening in the C++ world, stay tuned on the Visual C++ team (aka WinC++ team) blog and ask questions in the C++ forums. Comments about this post welcome at the original blog.

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  • Creating a python android application

    - by Harry
    I need help creating a android app on python. I'm creating an actual android game on python to use on my phone. I need suggestions of what app people would prefer. Anything you have have always wanted on your phone but no ones made it? Please post some suggestions below. I will start writing the code soon and will keep updating this post or creating a new ones asking new questions, so please keep an eye out. I also need help and software on how to start writing the code and how to test it. Thanks in advance.

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  • Setting effects variables in XNA

    - by Badescu Alexandru
    Hello ! I am currently reading a book named "3D Graphics with XNA Game Studio 4.0" by Sean James and have some questions to ask : If i create a effect parameter named lets say SpecularPower and have in my effect a variable named SpecularPower , if i do something like effect.Parameters["SpecularPower"].SetValue(3) That wil change the SpecularPower variable in my effect ? And a second question, not regarding the book : If i have a spaceship and i've created a "boost" functionality that speeds up my spaceship, what effects should i implement to create the impresion oh high speed ? I was thinking of making everything except my spaceship blurry but i think there would be something missing . Any ideas ? Regards, Alex Badescu

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  • Would learning any (linguistic) language in particular further your programming career?

    - by Anonymous
    It seems apparent that English is the dominant international language for programming based on previous P.SE questions (though a highly upvoted comment correctly points out that asking a question like that on a predominantly English site will skew the results). However, is there benefit in learning a foreign language for software development? For example, do the Chinese have completely different software tools, languages, technologies, etc? How about Japanese, Russian, and other non-latin based languages? Is there an entire world of software development languages, tools and so on that only exist in these other languages? Or do people that know these languages use the tools and languages we know and love?

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  • Backup all home folders on usb disk and accessibility

    - by PatrickV
    I am using Ubuntu 12.04 and have multiple family members working on it with there own home folder. I have an USB disk and want to use it to backup my home folders. Trying this, I got some questions. When my disk auto mount, it is not visible for each user. It seams to be visible for the user the time I connect the usb disk. I want to create one folder per home on the usb disk to backup the data to. But when I format the disk in EXT4 or FAT for example it is Read Only. How can I format the disk so it is accessible to every user. Best Regards, Patrick

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  • Provisioning Oracle Solaris 11

    - by Owen Allen
    OS Provisioning is one of the major features of Ops Center. You can set up an OS provisioning plan and profile, which specify how an OS is deployed, and then use them to create new operating systems on any number of systems. Oracle Solaris 11 works a bit differently than older versions of Oracle Solaris, though, and even if you've done OS provisioning before you might have some questions about how to provision it. The Provisioning Oracle Solaris 11 OS how-to walks you through discovering the target hardware, creating a simple OS provisioning plan and profile, and launching a job to provision an OS. There's further information in the Provisioning Operating Systems section of the Feature Guide.

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  • Ubuntu 12.04-2 does not install with UEFI

    - by Rodrigo
    I'm in trouble to instal Ubuntu in Insipiron 14z. I've already created this question (that was wrongly marked as duplicated): First question But, the error seems to be with UEFI. If I disable UEFI on BIOS Setup, I can get into installation process of Ubuntu normally. But, I didn't finish the installation process because I think that will screw Windows 8 installation. So my questions is: Ubuntu installation should work with UEFI. So, why it didn't? Knowing that the error is with UEFI. I can forget the errors listed here?

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  • Design review for application facing memory issues

    - by Mr Moose
    I apologise in advance for the length of this post, but I want to paint an accurate picture of the problems my app is facing and then pose some questions below; I am trying to address some self inflicted design pain that is now leading to my application crashing due to out of memory errors. An abridged description of the problem domain is as follows; The application takes in a “dataset” that consists of numerous text files containing related data An individual text file within the dataset usually contains approx 20 “headers” that contain metadata about the data it contains. It also contains a large tab delimited section containing data that is related to data in one of the other text files contained within the dataset. The number of columns per file is very variable from 2 to 256+ columns. The original application was written to allow users to load a dataset, map certain columns of each of the files which basically indicating key information on the files to show how they are related as well as identify a few expected column names. Once this is done, a validation process takes place to enforce various rules and ensure that all the relationships between the files are valid. Once that is done, the data is imported into a SQL Server database. The database design is an EAV (Entity-Attribute-Value) model used to cater for the variable columns per file. I know EAV has its detractors, but in this case, I feel it was a reasonable choice given the disparate data and variable number of columns submitted in each dataset. The memory problem Given the fact the combined size of all text files was at most about 5 megs, and in an effort to reduce the database transaction time, it was decided to read ALL the data from files into memory and then perform the following; perform all the validation whilst the data was in memory relate it using an object model Start DB transaction and write the key columns row by row, noting the Id of the written row (all tables in the database utilise identity columns), then the Id of the newly written row is applied to all related data Once all related data had been updated with the key information to which it relates, these records are written using SqlBulkCopy. Due to our EAV model, we essentially have; x columns by y rows to write, where x can by 256+ and rows are often into the tens of thousands. Once all the data is written without error (can take several minutes for large datasets), Commit the transaction. The problem now comes from the fact we are now receiving individual files containing over 30 megs of data. In a dataset, we can receive any number of files. We’ve started seen datasets of around 100 megs coming in and I expect it is only going to get bigger from here on in. With files of this size, data can’t even be read into memory without the app falling over, let alone be validated and imported. I anticipate having to modify large chunks of the code to allow validation to occur by parsing files line by line and am not exactly decided on how to handle the import and transactions. Potential improvements I’ve wondered about using GUIDs to relate the data rather than relying on identity fields. This would allow data to be related prior to writing to the database. This would certainly increase the storage required though. Especially in an EAV design. Would you think this is a reasonable thing to try, or do I simply persist with identity fields (natural keys can’t be trusted to be unique across all submitters). Use of staging tables to get data into the database and only performing the transaction to copy data from staging area to actual destination tables. Questions For systems like this that import large quantities of data, how to you go about keeping transactions small. I’ve kept them as small as possible in the current design, but they are still active for several minutes and write hundreds of thousands of records in one transaction. Is there a better solution? The tab delimited data section is read into a DataTable to be viewed in a grid. I don’t need the full functionality of a DataTable, so I suspect it is overkill. Is there anyway to turn off various features of DataTables to make them more lightweight? Are there any other obvious things you would do in this situation to minimise the memory footprint of the application described above? Thanks for your kind attention.

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  • Setter Validation can affect performance?

    - by TiagoBrenck
    Whitin a scenario where you use an ORM to map your entities to the DB, and you have setter validations (nullable, date lower than today validation, etc) every time the ORM get a result, it will pass into the setter to instance the object. If I have a grid that usually returns 500 records, I assume that for each record it passes on all validations. If my entity has 5 setter validations, than I have passed in 2.500 validations. Does those 2.500 validations will affect the performance? If was 15.000 validation, it will be different? In my opinion, and according to this answer (http://stackoverflow.com/questions/4893558/calling-setters-from-a-constructor/4893604#4893604), setter validation is usefull than constructors validation. Is there a way to avoid unecessary validation, since I am safe that the values I send to DB when saving the entity wont change until I edit it on my system?

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  • Which design better when use foreign key instead of a string to store a list of id

    - by Kien Thanh
    I'm building online examination system. I have designed to table, Question and GeneralExam. The table GeneralExam contains info about the exam like name, description, duration,... Now I would like to design table GeneralQuestion, it will contain the ids of questions belongs to a general exam. Currently, I have two ideas to design GeneralQuestion table: It will have two columns: general_exam_id, question_id. It will have two columns: general_exam_id, list_question_ids (string/text). I would like to know which designing is better, or pros and cons of each designing. I'm using Postgresql database.

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  • Webhosting for a TV channel with streaming video

    - by Murtez
    Hi guys, I'm making a website for a web based TV channel, so I'm assuming it will be heavy on bandwidth usage, but I'm no good at calculating bandwidth. Couple of questions: Assuming the site streams HD video 24 / 7 to 1000 people, how much bandwidth is that? Where should something like this be hosted? The channel will have a fiber internet optic connection, but I don't know the limit on their bandwidth, would it be better to get their own server or host online? In either case in question 2, any recommendations? I'm usually a regular web designer for minor businesses, so this is a new level. Your help is appreciated.

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  • How can I start Busybox at boot time, from GRUB, or even before GRUB?

    - by Andrei
    Most Busybox questions are related to the fact that users are dropped to a Busybox shell due to some unknown issues at boot time. This must make Busybox one of the most hated pieces of software. My problem is the opposite. I want to deliberately start Busybox at boot time either from GRUB, or even before GRUB. Is this possible? How can I do it? The purpose is to execute some commands before the boot sequence is reinitiated. So basically I want to execute some commands to make some hardware available to the bootloader.

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  • PHP security regarding login

    - by piers
    I have read a lot about PHP login security recently, but many questions on Stack Overflow regarding security are outdated. I understand bcrypt is one of the best ways of hashing passwords today. However, for my site, I believe sha512 will do very well, at least to begin with. (I mean bcrypt is for bigger sites, sites that require high security, right?) I´m also wonder about salting. Is it necessary for every password to have its own unique salt? Should I have one field for the salt and one for the password in my database table? What would be a decent salt today? Should I join the username together with the password and add a random word/letter/special character combination to it? Thanks for your help!

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  • How to Handle Managing a Coding Project With 8 Friends?

    - by Raul
    I usually code by myself but currently I need to do a java web-based project with 8 of my friends. I would like to ask the following questions: 1) How to document the development properly? Like how to keep a daily log? Any software or format suggested? What things do you think are important to be included in the log? 2) How to code together? Is there any software/IDE that allows a team to code together? Something ike google docs? 3) How to do a proper backup for a team project? Any software or tips to share?

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  • Platforms for sharing content and expertise

    - by Thomas
    Are there any platforms / sites where people can share expertise in game development and where you can share (either payed or free) digital content (like images, sounds, animations but also frameworks or libraries) to be used in games? I'd also like the possibility to contact users and request specific pieces of content. I'd like to start out as an indie developer and have programming skills but I lack the experience and time to create ingame artwork and sound. Is there any site where I could locate other people (artists mostly) who would want to work on a game for free? I know I can get most technical questions answered on this site and I have some contacts but I'm affraid this won't be enough.

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  • SDL to SFML simple question

    - by ultifinitus
    Hey! I've been working on a game in c++ for about a week and a half, and I've been using SDL. However, my current engine only needs the following from whatever library I use: enable double buffering load an image from path into something that I can apply to the screen apply an image to the screen with a certain x,y enable transparency on an image (possibly) image clipping, for sprite sheets. I am fairly sure that SFML has all of this functionality, I'm just not positive. Will someone confirm my suspicions? Also I have one or two questions regarding SFML itself. Do I have to do anything to enable hardware accelerated rendering? How quick is SFML at blending alpha values? (sorry for the less than intelligent question!)

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  • Limiting Audit Exposure and Managing Risk – Q&A and Follow-Up Conversation

    - by Tanu Sood
    Thanks to all who attended the live ISACA webcast on Limiting Audit Exposure and Managing Risk with Metrics-Driven Identity Analytics. We were really fortunate to have Don Sparks from ISACA moderate the webcast featuring Stuart Lincoln, Vice President, IT P&L Client Services, BNP Paribas, North America and Neil Gandhi, Principal Product Manager, Oracle Identity Analytics. Stuart’s insights given the team’s role in providing IT for P&L Client Services and his tremendous experience in identity management and establishing sustainable compliance programs were true value-add at yesterday’s webcast. And if you are a healthcare organization looking to solve your compliance and security challenges, we recommend you join us for a live webcast on Tuesday, November 29 at 10 am PT. The webcast will feature experts from Kaiser Permanente, PricewaterhouseCoopers and Oracle and the focus of the discussion will be around the compliance challenges a healthcare organization faces and best practices for tackling those. Here are the details: Healthcare IT News Webcast: Managing Risk and Enforcing Compliance in Healthcare with Identity Analytics Tuesday, November 29, 201110:00 a.m. PT / 1:00 p.m. ET Register Today The ISACA webcast replay is now available on-demand and the slides are also available for download. Since we didn’t have time to address all the questions we received during the live Q&A portion of the webcast, we have captured responses to the remaining questions here. Please continue to provide us your feedback and insights from your experience in deploying identity compliance solutions. Q. Can you please clarify the mechanism utilized to populate the Identity Warehouse from each individual application's access management function / files? A. Oracle Identity Analytics (OIA) supports direct imports from applications. Data collection is based on Extract, Transform and Load (ETL) that eliminates the need to write connectors to different applications. Oracle Identity Analytics’ import engine supports complex entitlement feeds saved as either text files or XML. The imports can be scheduled on a periodic basis or triggered as needed. If the applications are synchronized with a user provisioning solution like Oracle Identity Manager, Oracle Identity Analytics has a seamless integration to pull in data from Oracle Identity Manager. Q.  Can you provide a short summary of the new features in your latest release of Oracle Identity Analytics? A. Oracle recently announced availability of enhanced Oracle Identity Analytics. This release focused on easing the certification process by offering risk analytics driven certification, advanced certification screens, business centric views and significant improvement in performance including 3X faster data imports, 3X faster certification campaign generation and advanced auto-certification features, that  will allow organizations to improve user productivity by up to 80%. Closed-loop risk feedback and IT policy monitoring with Oracle Identity Manager, a leading user provisioning solution, allows for more accurate certification reviews. And, OIA's improved performance enables customers to scale compliance initiatives supporting millions of user entitlements across thousands of applications, whether on premise or in the cloud, without compromising speed or integrity. Q. Will ISACA grant a CPE credit for attending this ISACA-sponsored webinar today? A. From ISACA: Hello and thank you for your interest in the 2011 ISACA Webinar Program!  Unfortunately, there are no CPEs offered for this program, archived or live.  We will be looking into the feasibility of offering them in the future.  Q. Would you be able to use this to help manage licenses for software? That is to say - could it track software that is not used by a user, thus eliminating the software license? A. OIA’s integration with Oracle Identity Manager, a leading user provisioning solution, allows organizations to detect ghost accounts or unused accounts via account reconciliation. Based on company’s policies, this could trigger an automated workflow for account deletion or asking for further investigation. Closed-loop feedback between the two solutions would then allow visibility into the complete audit trail of when the account was detected, the action taken, by whom, when and the current status. Q. We have quarterly attestations and .xls mechanisms are not working. Once the identity data is correlated in Identity Analytics, do you then automate access certification? A. OIA’s identity warehouse analyzes and correlates identity data across various resources that allows OIA to determine a user’s risk profile, who the access review request should go to, along with all the relevant access details of the user. The access certification manager gets notification on what to review, when and the relevant data is presented in a business friendly screen. Based on the result of the access certification process, actions are triggered and results recorded and archived. Access review managers have visual risk indicators that also allow them to prioritize access certification tasks and efforts. Q. How does Oracle Identity Analytics work with Cloud Security? A. For enterprises looking to build their own cloud(s), Oracle offers a set of security services that cloud developers can leverage including Oracle Identity Analytics.  For enterprises looking to manage their compliance requirements but without hosting those in-house and instead having a hosting provider offer managed Identity Management services to the organizations, Oracle Identity Analytics can be leveraged much the same way as you’d in an on-premise (within the enterprise) environment. In fact, organizations today are leveraging Oracle Identity Analytics to manage identity compliance in both these ways. Q. Would you recommend this as a cost effective solution for a smaller organization with @ 2,500 users? A. The key return-on-investment (ROI) on Oracle Identity Analytics is derived from automating compliance processes thereby eliminating administrative overhead, minimizing errors, maintaining cost- and time-effective sustainable compliance processes and minimizing audit exposures and penalties.  Of course, there are other tangible benefits that are derived from an Oracle Identity Analytics implementation as outlined in the webcast. For a quantitative analysis of your requirements and potential ROI calculation, we recommend you refer to the Forrester Study on Total Economic Impact of Oracle Identity Analytics. For an in-person discussion, please email Richard Caldwell.

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  • Oracle R Enterprise Tutorial Series on Oracle Learning Library

    - by mhornick
    Oracle Server Technologies Curriculum has just released the Oracle R Enterprise Tutorial Series, which is publicly available on Oracle Learning Library (OLL). This 8 part interactive lecture series with review sessions covers Oracle R Enterprise 1.1 and an introduction to Oracle R Connector for Hadoop 1.1: Introducing Oracle R Enterprise Getting Started with ORE R Language Basics Producing Graphs in R The ORE Transparency Layer ORE Embedded R Scripts: R Interface ORE Embedded R Scripts: SQL Interface Using the Oracle R Connector for Hadoop We encourage you to download Oracle software for evaluation from the Oracle Technology Network. See these links for R-related software: Oracle R Distribution, Oracle R Enterprise, ROracle, Oracle R Connector for Hadoop.  As always, we welcome comments and questions on the Oracle R Forum.

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