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  • What strategy should be employed to access Facebook data offline?

    - by user686021
    I'm working on a project similar to Klout which provides detail about how you influence other people and who influenced you. We'll be fetching data from few social networking sites (i.e linked in, facebook, twitter etc) to analyze how users interacts with one another. For that we need to parse the data and store it in db and have to analyze it so that strength of relation of two user can be decided. We'll be accessing data offline as well to provide them with accurate results. If we consider facebook activities, we need to have access to Facebook users' news feed, wall data which includes likes,comments,shares etc. To decide how one user influence other, we'll store all the data and analyze it. I need suggestions on what steps need to be taken for great performance. We'll be using ASP.Net(C#) Web forms, SQL Server, jQuery. Main concern is parsing of data, it's storage and retrieval with least overhead. For that I've summarized few points as below : Should we switch over to document-oriented database, like MongoDB or RavenDB for the whole app or part of it even though none of team member have experience with them? Should we use SQL Server Analysis service? Is there any other library than Json.NET for parsing data? Is it advisable to use any C# library over FQL + GET Request ? I've tried to provide as much info as possible. Please share your views for the same.

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  • Free Xsigo Technical Pre-sales workshop for Selected Partners !

    - by mseika
    In 2012 Oracle acquired Xsigo, a developer of network I/O virtualisation solutions. This acquisition compliments Oracle’s extensive virtualisation portfolio. With Oracle Virtual Networking products (Xsigo) you can: Virtualise connectivity from any server to any storage and any network. Reduce datacentre complexity by 70% Cut infrastructure expenses by up to 50% Benefits to Channel Partners: Offer a unique proposition that your competitors can’t match. Provide an innovative solution that delivers more performance at less cost. High margins that help sell more products and services. This course is aimed at Technical Pre-Sales Consultants equipping them to provide detailed demos, and architect RFP feedback and customer solutions. The language of this event is French. WHEN24th September 2013 WHEREOracle France 15, boulevard Charles De Gaulle92715 COLOMBES FEESFree of charge 09.00: Welcome, Coffee & Introduction 09.30: Value Propositions, Architecture & Use Cases 11.30: Build a OVN Web Quote & TCO 12.30: Lunch 13.30: Competitive Summary 14.00: Design Scenario Workshop 15.45: Questions/Opportunities  REGISTRATION: Register via this link as soon as possible, 14th june, latest. Note that we have only 20 seats in total for this event. Note that after 14th june we will release free seats for other organizations to register. We look forward to your participation! What we expect from you: You will bring your own laptop. Recommended browser is Firefox 10 ESR. You have checked the material and conducted the assessments. You will be flexible in terms of Agenda and Progress as we intend this to be more of a Workshop having Dialogue rather than sticking tightly into the tentative timeline. What this is not: This PartnerLab does not replace Oracle University Trainings. This PartnerLab does not lead to a Certification as such. This PartnerLab does not enable Partners to full and complete implementation skills.

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  • ADF - Now with Robots!

    - by Duncan Mills
    I mentioned this briefly in a tweet the other day, just before the full rush of OOW really kicked off, so I though it was worth re-visiting. Check out this video, and then read on: So why so interesting? Well - you probably guessed from the title, ADF is involved. Indeed this is as about as far from the traditional ADF data entry application as you can get. Instead of a database at the back-end there's basically a robot. That's right, this remarkable tape drive is controlled through an ADF using all your usual friends of ADF Faces, Controller and Binding (but no ADFBC for obvious reasons). ADF is used both on the touch screen you see on the front of the device in the video, and also for the remote management console which provides a visual representation of the slots and drives. The latter uses ADF's Active Data Framework to provide a real-time view of what's going on the rack. . What's even more interesting (for the techno-geeks) is the fact that all of this is running out of flash storage on a ridiculously small form factor with tiny processor - I probably shouldn't reveal the actual specs but take my word for it, don't complain about the capabilities of your laptop ever again! This is a project that I've been personally involved in and I'm pumped to see such a good result and,  I have to say, those hardware guys are great to work with (and have way better toys on their desks than we do). More info in the SL150 (should you feel the urge to own one) is here. 

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  • Offsite Backup

    - by Grant Fritchey
    There was a recent weather event in the United States that seriously impacted our power grid and our physical well being. Lots of businesses found that they couldn’t get to their building or that their building was gone. Many of them got to do a full test of their disaster recovery processes. A big part of DR is having the ability to get yourself back online in a different location. Now, most of us are not going to be paying for multiple sites, but, we need the ability to move to one if needed. The best thing you can to start to set this up is have an off-site backup. Want an easy way to automate that? I mean, yeah, you can go to tape or to a portable drive (much more likely these days) and then carry that home, but we’ve all got access to offsite storage these days, SkyDrive, DropBox, S3, etc. How about just backing up to there? I agree. Great idea. That’s why Red Gate is setting up some methods around it. Want to take part in the early access program? Go here and try it out.

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  • Is it OK to create all primary partitions.?

    - by james
    I have a 320GB hard disk. I only use either ubuntu or kubuntu (12.04 for now). I don't want to use windows or any other dual boot os. And i need only 3 partitions on my hard disk. One for the OS and remaining two for data storage. I don't want to create swap also. Now can i create all primary partitions on the hard disk. Are there any disadvantages in doing so. If all the partitions are primary i think i can easily resize partitions in future. On second thought i have the idea of using seperate partition for /home. Is it good practice . If i have to do this, i will create 4 partitions all primary. In any case i don't want to create more than 4 partitions . And i know the limit will be 4. So is it safe to create all 3 or 4 primary partitions. Pls suggest me, What are the good practices . (previously i used win-xp and win-7 on dual boot with 2 primary partitions and that bugged me somehow i don't remember. Since then i felt there should be only one primary partition in a hard disk.) EDIT 1 : Now i will use four partitions in the sequence - / , /home , /for-data , /swap . I have another question. Does a partition need continuous blocks on the disk. I mean if i want to resize partitions later, can i add space from sda3 to sda1. Is it possible and is it safe to do ?

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  • Is text-only mode a saving or a problem for battery savings?

    - by Robottinosino
    A friend is flying to the US from Europe and asked me a very thought-provoking question, which I am not remotely able to answer with substance so I am asking it here: How to absolutely maximise battery life on an Ubuntu (laptop) install? do not rush to mark this as duplicate, there is an important point here: does -GNOME- help or worsen battery life? Let me provide some context: The only task he needs to perform is: edit text files in Vim. He is unsure whether running GNOME will drain his battery life more or actually save him some battery life given the smarts of GNOME's power management features like "switch this peripheral to -power save- after X minutes..." (GNOME might just be a configuration front-end for settings that are governed by command-line utils for all I know?) He could perfectly well boot the system in text-only mode and use the automatic 6 virtual consoles for his needs, if that's a saving at all over running tmux (I think so because of all the smart buffering/history/etc the latter does by default?) Exactly how would you advise him to run his laptop during his flight? What I told him already: power off WiFi in the BIOS, not from the "GUI" power off Bluetooth switch off the courtesy light and use low monitor brightness play music off of his phone, not mp3blaster do not use his tiny portable mouse (and do not attach any other USB gimmicks like "screen light", etc) stop development services he will not be using, especially apache2, tomcat, dovecot, postgresql, etc. Potentially: - switch off his cron jobs? (he does an rsync + tar + 7za of his "work in progress" every so often) I think the above is standard stuff one could get off StackExchange, and with many duplicates... the core of this question is, I think: __ will running Ubuntu in text-only mode be a saving in terms of battery life or a problem? why? (provide some technical arguments) __ I think it will be a saving but I am also scared about "other things" detecting and enabling advanced chipset power management features only when some services are started.. and fear these "services" may be off in text-only mode?

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  • Default mount options on auto-mounted NTFS partitions (how to add `noexec` and `fmask=0111`?)

    - by jetxee
    I use auto-mounting of external USB devices, and it works as expected, except that NTFS partitions are mounted with executability flag on. For example: /dev/sdb1 on /media/Elements type fuseblk (rw,nosuid,nodev,allow_other,blksize=4096,default_permissions) All normal files are -rwxrwxrwx on this partition. I am not happy with the xs. I know I can have it mounted the way I want if I pass the fmask=0111 option. Now I use Lucid, and suppose it uses some new auto-mounting mechanism (gvfs-mount?), but I don't really know how the default mounting options can be changed now. Gconf settings in /system/storage/default_options/ntfs/mount_options have no effect. So, how do I make fmask=0111 the default automounting option for all NTFS partitions? (I'd be grateful also if someone explains how the current automounting mechanism works, how to configure it, and if the default mounting options are hard-coded, what I have to recompile to change them). I know that I can put a line in the /etc/fstab and/or mount manually, but this is not the solution I want, because 1) I don't want to edit /etc/fstab for each and every external drive I use, 2) fstab records appear in the Places pane of Nautilus, even if the drives are not present. The questions is how to change the defaults.

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  • What's wrong performing unit test against concrete implementation if your frameworks are not going to change?

    - by palm snow
    First a bit of background: We are re-architecting our product suite that was written 10 years ago and served its purpose. One thing that we cannot change is the database schema as we have 500+ client base using this system. Our db schema has over 150+ tables. We have decided on using Entity Framework 4.1 as DAL and still evaluating various frameworks for storing our business logic. I am investigation to bring unit testing into the mix but I also confused as to how far I need to go with setting up a full blown TDD environment. One aspect of setting up unit testing is by getting into implementing Repository, unit of work and mocking frameworks etc. This mean there will be cost and investment on the code-bloat associated with all these frameworks. I understand some of this could be auto-generated but when it comes to things like behaviors, that will be mostly hand written. Just to be clear, I am not questioning the important of unit testing your code. I am just not sure we need all its components (like repository, mocking etc.) when we are fairly certain of storage mechanism/framework (SQL Server/Entity Framework). All that code bloat with generic repositories make sense when you need a generic layers with ability to change this whenever you like however its very likely a YAGNI in our case. What we need is more of integration testing where we can unit-test our code with concrete repository objects and test data in database. In this scenario, just running integration test seem to be more beneficial in our case. Any thoughts if I am missing any thing here?

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  • Can't install Ubuntu 12.04 64-bit on a dual-drive MacBook Pro 8,2

    - by kizdp
    Good afternoon, this is the first time I participate here as I'm new to Linux. I've been trying to solve the following problem for over a week without any sign of success so I hope there's a much more knowledgeable person here that can give me a solution. I have an early 2011 MacBook Pro (8,2) with Mac OS X running in a SSD. Then, instead of the Optical bay, I have a HDD in where I would like to install Ubuntu to run it natively. I've tried to do the normal installation process, with or without rEFIt, but it seems the problem resides on the communication between the device containing the Ubuntu .iso file and the laptop. It doesn't allow communication with the boot CD or USB drive. It usually says: “Loading bootlogo...” after I click on the “boot from CD, Linux Icon”. After trying several things, I would like to know if I could install Ubuntu on the HDD as an external HDD (using a friend's Window's system) and then simply put it back into my laptop so as to become an Internal HDD again. I guess, I would have to reinstall many drivers and so on, but would this approach work? Thanks in advance and sorry for this huge block of text

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  • ACT On' OVCA for Cloud Providers Program Launch Webcast: June 12, 2014 - 9am UKT / 10am CET / 11am EET

    - by Cinzia Mascanzoni
    Normal 0 false false false EN-US X-NONE X-NONE We invite you to join the OVCA for Cloud Providers ‘ACT On' program launch at 11am BST / 12noon CET on June 12. · More and more customers realize the value of shifting to a Converged IT Infrastructure, this is why IDC expects this market to grow 40% annually for the next 2 years. · The Oracle Virtual Compute Appliance (OVCA) with attached ZFS storage is the perfect answer to this market trend. By providing rapid application and cloud deployment, OVCA allows customers to cut capital expenditures by up to 50% and deploy key applications up to 7x faster. · For Partners, OVCA supports their journey to consolidation, virtualization and cloud, and allows them to sell higher value services to their customers. The objective of this webcast is to share with you the OVCA value proposition, help you identify the best target partners, and provide you with the Enablement and Demand Generation content and resources. To register and for further details click here /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin-top:0cm; mso-para-margin-right:0cm; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0cm; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;}

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  • So You Want To Build a SPARC Cloud

    - by user12601629
    Did you ever wish you could get the industrial strength power of UNIX/RISC with the flexibility of cloud computing?  Well, now you can!  With recent advances from Oracle it's possible to build an incredibly high-performance, flexible, available virtualized infrastructure based on Solaris and SPARC.  Here's the recipe! Authored in collaboration across the Oracle "Systems Group" team, we now have a complete best practice guide for you.  Click below to download it: Best Practices for Building a Virtualized SPARC Computing Environment Inside you'll find recommendations for how and when to leverage technologies like: SPARC T4 OVM for SPARC hypervisor (version 2.2 and newer) Solaris 11 Ops Center 12c ZFS Storage Appliance Oracle network switches Based on following these best practices, you'll be able to construct a dynamic, virtualized infrastructure that allows for: Easy, GUI-based provisioning on new VMs Automated HA failover in the event of physical server failures Automatic load balancing across a cluster of VM hosts Complete end-to-end monitoring You should download this paper and check it out.  Even if you aren't planning on buying all new hardware, and instead want to transform some existing gear into a dynamic virtualized environment then this paper will give you concrete info on what to do and the trade-offs you'll make. Have fun getting started on your journey to build a SPARC cloud!

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  • AngularJS dealing with large data sets (Strategy)

    - by Brian
    I am working on developing a personal temperature logging viewer based on my rasppi curl'ing data into my web server's api. Temperatures are taken every 2 seconds and I can have several temperature sensors posting data. Needless to say I will have a lot of data to handle even within the scope of an hour. I have implemented a very simple paging api from the server so the server doesn't timeout and is currently only returning data in 1000 units per call, then paging through the data. I had the idea to intially show say the last 20 minutes of data from a sensor (or all sensors depending on user choices), then allowing the user to select other timeframes from which to show data. The issue comes in when you want to view all sensors or an extended time period (say 24 hours). Is there a best practice of handling this large amount of data? Would it be useful to load those first 20 minutes into the live view and then cache into local storage something like the last 24 hours? I haven't been able to find a decent idea of this in use yet even though there are a lot of ways to take this problem. I am just looking for some suggestions as to what might provide a good balance between good performance and not caching the entire data set on the client side (as beyond a week of data this might not be feasible).

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  • recovering raid 0 hard disk

    - by Hiawatha
    I bumped to a huge (for me) problem. I was running dual boot system (win 7 / linux) and at some point I decided to test fedora ( I am new in Linux ). My hard disk conf: 3 hard disks each 1 TB, 2 set to raid 0 with windows running on it and 1 for linux. After installing it from live usb I found out that windows 7 is not in grub anymore and while booting shows raid error. I installed back Ubuntu and ran Disk Utility and checked now I have one disks (raid 0) failed (READ) error. First has 5 bad sectors and second has 1 bad sector. And now I dont know what to do and how to repair. further I dont know which data i could provide to get help. I tried ntfsfix and got this output: Mounting volume... NTFS signature is missing. FAILED Attempting to correct errors... NTFS signature is missing. FAILED Failed to startup volume: Invalid argument NTFS signature is missing. Trying the alternate boot sector Unrecoverable error Volume is corrupt. You should run chkdsk. #sudo ntfs-3g -o force,rw /dev/sdb /media/windows NTFS signature is missing. Failed to mount '/dev/sdb': Invalid argument The device '/dev/sdb' doesn't seem to have a valid NTFS. Maybe the wrong device is used? Or the whole disk instead of a partition (e.g. /dev/sda, not /dev/sda1)? Or the other way around?

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  • Having trouble installing Bradcom STA driver

    - by user192881
    I just installed Ubuntu and love it so much, its so fast now. But I have a problem connecting to the internet. I checked and saw I have to install the driver Broadcom STA wireless driver but every time I do try to install it it says: Sorry, installation of this driver failed. Please have a look at the log files for details: /var/log/jockey.log I went to the terminal and copy and pasted the log file name. and when I did it, it said I have no permission to access this file. I checked on the forums that I have to be on a wired connection. So I plugged my laptop into my router and I got internet then tried to install the driver again. And it was loading then when it got to the end the same message popped up. Also I have one of those little USB router things you plug into the computer and it gives you internet I have been using that but its to slow. So I want to use the one in my computer but cant. Also I tried the command: sudo modprobe wl and when i type that command in it says: FATAL: Module wl not found Also I'm using Ubuntu 12.04

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  • Securing a Cloud-Based Data Center

    - by Orgad Kimchi
    No doubt, with all the media reports about stolen databases and private information, a major concern when committing to a public or private cloud must be preventing unauthorized access of data and applications. In this article, we discuss the security features of Oracle Solaris 11 that provide a bullet-proof cloud environment. As an example, we show how the Oracle Solaris Remote Lab implementation utilizes these features to provide a high level of security for its users. Note: This is the second article in a series on cloud building with Oracle Solaris 11. See Part 1 here.  When we build a cloud, the following aspects related to the security of the data and applications in the cloud become a concern: • Sensitive data must be protected from unauthorized access while residing on storage devices, during transmission between servers and clients, and when it is used by applications. • When a project is completed, all copies of sensitive data must be securely deleted and the original data must be kept permanently secure. • Communications between users and the cloud must be protected to prevent exposure of sensitive information from “man in a middle attacks.” • Limiting the operating system’s exposure protects against malicious attacks and penetration by unauthorized users or automated “bots” and “rootkits” designed to gain privileged access. • Strong authentication and authorization procedures further protect the operating system from tampering. • Denial of Service attacks, whether they are started intentionally by hackers or accidentally by other cloud users, must be quickly detected and deflected, and the service must be restored. In addition to the security features in the operating system, deep auditing provides a trail of actions that can identify violations,issues, and attempts to penetrate the security of the operating system. Combined, these threats and risks reinforce the need for enterprise-grade security solutions that are specifically designed to protect cloud environments. With Oracle Solaris 11, the security of any cloud is ensured. This article explains how.

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  • Best practice- handling images on website

    - by Steve
    I am porting an old eCommerce site to MVC 3 and would like to take advantage of design improvements. The site currently has product images stored in 3 sizes: thumbnail, medium (for display in a list) and expanded for a zoomed look. Right now we are having to upload 3 separate images that are sized exactly right, provide 3 different names that match what the site expects, etc., it is a pain. I'd like to upload just 1 file, the large one, then let the site reduce it to needed sizes, and I'd like the flexibility to change the thumbnail and list sizes depending on user preferences, form factor (e.g. mobile, iPad, desktop), etc. so might need many copies of the same image. My question is should the image be reduced then saved several times upon upload and if so what is a good storage/naming convention? The other idea is to store just the single image but resize it programmatically before serving it to the client. Has anybody done this and what are the tradeoffs besides a few more machine cycles? How do you pass a temporary image in memory to the client (there is no URL)?

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  • Ubuntu cannot see Windows 7 partitions on install

    - by Nash0
    I've been trying to install Ubuntu 10.10 as a dual boot with Windows 7 on my Dell latitude e6510. It is currently running Windows 7 and I have used the MS disk tools to shrink the Win 7 NTFS partition to make room for Linux. The issue I'm having is that when I run Ubuntus installer by booting from CD it sees the entire hard drive as unallocated space. I have also tried Kbuntu 10.10, Fedora 14, booting a Gparted 0.8.0 usb drive, and Ubuntu "install in Windows" with wubi they all have problems. EDIT: When I run the "try Ubuntu" option on booting from cd it can mount my Windows partition and I can view the files. The output of sudo parted -l when running in try Ubuntu mode: Warning: /dev/sda contains GPT signatures, indicating that it has a GPT table. However, it does not have a valid fake msdos partition table, as it should. Perhaps it was corrupted -- possibly by a program that doesn't understand GPT partition tables. Or perhaps you deleted the GPT table, and are now using an msdos partition table. Is this a GPT partition table? Yes/No? yes Model: ATA ST9500420AS (scsi) Disk /dev/sda: 500GB Sector size (logical/physical): 512B/512B Partition Table: gpt Number Start End Size File system Name Flags Warning: Unable to open /dev/sr0 read-write (Read-only file system). /dev/sr0 has been opened read-only. Error: /dev/sr0: unrecognised disk label

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  • Resized Ubuntu 14.04 partition will not boot

    - by user292577
    First, a little background info: I intended to install Ubuntu alongside OS X, but I accidentally erased my entire hard drive and was left with Ubuntu alone. Yesterday, I finally tried to create a desperate partition and OS X. I successfully shrank my Ubuntu partition and created ~40 GB of free space. I used gparted to do this. At first I tried to use Internet Recovery to install OS X on the unallocated space I had created, but discovered I couldn't. I went back to gparted and created a FAT partition with that space. I'm pretty sure I actually did this using my Ubuntu partition on my hard drive (the one I had just shrunken), rather than the USB live boot I had used to shrink it. Therefore, at this point, I think my Ubuntu partition was still functioning properly. I went back to internet recovery and used disk utility to turn the FAT partition into a Mac OS Extended (Journaled) [HFS/HFS+] partition. I believe this is probably where the problem occurred. I successfully reinstalled OS X and found it to be fully functioning. However, when I tried to boot back into the Ubuntu partition all I got was a black screen with a little white cursor (it looks similar to a terminal screen/the Mac DFU mode, but I can't type anything into it. Is there anything I can do to repair my Ubuntu partition? If not, can I at least recover the data from it? Thank you for any help.

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  • Acer aspire v3 771G ubuntu 13.04

    - by Jos
    Gooday, i have this acer and i have alot of boot problems (i suspect windows 8) and now i want to try ubuntu but when i use an usb to "try" ubuntu after the boot i get a black screen. now ive read some of the forums and i found something about NOMODESET i have not tried this as i dont know what this does exactly. now i have found this wiki entry https://wiki.ubuntu.com/Bumblebee , i am by far no programmer and always reading all those commands have always kept me of linux because im scared i will !@#$ things up. is there anyway i can go to NOMODESET in the ubuntu "trial" and can i also include the bumblebee futures (coding?) and in how many ways wil this affect my laptops perfomance? reading the bumblebee entry its seems to be something about nvidia optimus and i dont reallt care much for the power saving, but will it affect any performance? im not a heavy pc gamer but i like tho do some gaming and streaming and such also on a rather big TV in wich this laptop already has it flaws in some games not running properly on 65" if this doesn't work or u advise me not to do this what else can i do to fix windows 8 or either some other linux version? i thankyou in advance

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  • What kinds of languages would be most useful for this kind of webapp?

    - by Caedar
    I've had some experience with programming in the past (2-3 years of C++ self-teaching), so I'm no stranger to the programming process, but there are so many languages out there that I'm lost when thinking about this project idea that's been floating around my head: I would like to create a webapp that would be used for helping somebody figure out what kinds of productivity tools would suit them. The first part of the app would basically be a survey with a variety of questions that would help weed out tools that wouldn't be useful for them. (Slider bar between minimalist and maximizer, slider bar between all free apps and no cost limit, checkboxes on what platforms are required, etc.) While the person is filling out the survey, they will see a web of applications, webapps, and other tools forming on the screen with links showing the relationships the programs have with eachother (syncing supported, good combinations of apps, etc.), along with a list of applications below sorted by general use (notetaking, document organization, storage, etc.) I would imagine that each program entered into the database that will be accessed would have a certain set of characteristics, ie. price, user friendliness, platforms supported, general uses, etc. and the survey would be designed to correlate to those elements and remove programs that don't match the criteria set. The difficult part of this entire process would be getting the web of applications to arrange itself and render properly. Now that I've finished mind-dumping, onto my question: What kinds/combinations of programming languages would you imagine being useful for this kind of project, and why? I learn best by setting up a project for myself like this one and tinkering with the languages, so I don't mind if the end product is out of reach from my current skill level. I'd just like some guidance so I don't fumble in the dark for too long.

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  • 12.04 doesn't boot anymore after a power failure

    - by Felix
    I'm a Windows user and I have no experience with Linux and Ubuntu. I installed Ubuntu 12.04 on my netbook (Asus 1215B) and everything works fine. Yesterday I ran the "update application" and updated over 120 "things" (I have no idea what exactly). After that I was asked to reboot, and I did. Ubuntu starts again and at the load screen with these 5 dots that normally begin to change color, it freezes. After 20 minutes I took out the battery to try another reboot (yes, not the the best idea), and now nothing happens. I boot from the HDD and I get an Error BOOTMGR is missing. I have important data on the hard drive. Is there an option to get this fixed? Or if not, to at least get the data from the hard drive? Ubuntu 12.04 64-bit Edit: it is ONLY Ubuntu on this Netbook, which uses the whole 500gb HDD as 1 Partition. Filesystem is NTFS. Whole Hardware seems okay. The USB drive which i used to instl the Os was formated in fat32

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  • Oneric Aspire One. After latest 11.10 update to Linux 3.0.0-9 boot hangs at staement "Starting Bluetooth"

    - by hevh
    I have today updated the version of Linux on Ubuntu on my Acer Aspire One. The boot hangs on the statement "Starting Bluetooth". Help please!! EDIT1: I get the grub menu when I start the netbook and it doesn´t matter which version of linux I choose the resulkt is the same. It gets as far as the Ubuntu spash screen then drops into command line mode then hangs on the line "Starting Bluetooth". I can log in and have tried various forms of the apt-get command to fix the system but with no result. I do not need bluetooth at the moment and so could remove the application if I knew how. (have tried apt-get remove bluez). When I use the command sudo apt-get -f install I get an error message saying "There's not enough space in /var/lib/mysql/" folowed by several other error messages. I have spent some time looking for similar problems and solutions using google but so far got to nothing to help. Thanks EDIT2: I have since discovered when running Knoppix or slitaz from a usb stick that the file managers report the hard disc as having no space. However GPARTED reports it as having 3.69gb. I do recall making space on the hard drive by deleting some old files and emptying trash whilst the update was running; perhaps its related. Any suggestions for how I can recover the apparently lost space from hard disc without losing the data. I have backups of the actual data but do not wnat to lose the applcations configuration. Thanks Kev

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  • Laser range finder, what language to use? Beginner advice

    - by DrOnline
    I hope this is the right place. I am a programming beginner, and I want to make a laser range finder, and I need advice about how to proceed etc. In a few weeks I will get a lot of dirt cheap 3-5V lasers and some cheap usb webcams. I will point the laser and webcam in parallel, and somehow use trigonometry and programming to determined distance. I have seen online that others made done it this way, I have purposefully not looked at the details too much because I want to develop it on my own, and learn, but I know the general outline. I have a general idea of how to proceed. The program loads in a picture from the webcam, and I dunno how images work really, but I imagine there is a format that is basically an array of RGB values.. is this right? I will load in the red values, and find the most red one. I know the height difference between the laser and the cam. I know the center dot in the image, I know the redmost dot. I'm sure there's some way to figure out some range there. TO THE POINT: 1) Is my reasoning sound thus far, especially in terms of image analysis? I don't need complete solutions, just general points 2) What I need to figure out, is what platform to use. I have an arduino... apparently, I've read it's too weak to process images. Read that online. I know some C I know some Python I have Matlab. Which is the best option? I do not need high sampling rates, I have not decided on whether it should be automated or whether I should make a GUI with a button to press for samples. I will keep it simple and expand I think. I also do not need it to be super accurate, I'm just having fun here. Advice!

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  • Wireless does not work 12.10

    - by superkoop
    My primary issue is that my wireless does not work after I installed 12.10. The output to rfkill list all: 5: hci0: Bluetooth Soft blocked: no Hard blocked: no The output to lshw -class network is: *-network description: Ethernet interface product: 88E8040 PCI-E Fast Ethernet Controller vendor: Marvell Technology Group Ltd. physical id: 0 bus info: pci@0000:09:00.0 logical name: eth0 version: 12 serial: 00:21:9b:d6:46:51 size: 100Mbit/s capacity: 100Mbit/s width: 64 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=sky2 driverversion=1.30 duplex=full ip=192.168.1.102 latency=0 link=yes multicast=yes port=twisted pair speed=100Mbit/s resources: irq:44 memory:fe8fc000-fe8fffff ioport:de00(size=256) *-network description: Network controller product: BCM4312 802.11b/g LP-PHY vendor: Broadcom Corporation physical id: 0 bus info: pci@0000:0b:00.0 version: 01 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list configuration: driver=b43-pci-bridge latency=0 resources: irq:17 memory:fe7fc000-fe7fffff The output to lspci -nn for the pertinent information is: 0b:00.0 Network controller [0280]: Broadcom Corporation BCM4312 802.11b/g LP-PHY [14e4:4315] (rev 01) Thus, it seems the solution would be to run: sudo apt-get install linux-headers-generic sudo apt-get install --reinstall bcmwl-kernel-source sudo modprobe wl However, I do not currently have access to an ethernet connection, as I am currently only able to use verizon wireless 3g internet. Thus, is there a way to set up ICS with a Vista machine so that I can access the internet by using the Vista machine as the host? Or, is it possible to fix this by downloading the important packages in vista and moving them to ubuntu via USB drive?

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  • Crackling sound from right laptop speaker

    - by user1880405
    This problem lasts for several months already (first on Ubuntu 13.10, not on 12.04. I get very loud cracking/popping sound from my right Asus K56C's speaker, I searched everything but could not get rid of it. Several facts: There is no problem on Windows 8. It has nothing to do with applications running because it appears even before login screen of Ubuntu. Also same problem if I boot from Live USB. Muting sound will remove noise, but lowering volume has no effect. Inserting any headphones, removes the noise. If I disconnect power cable while there is noise, noise will always disappear, but only if there is no music playing. If I start playing music, noise again appear even with power cable disconnected. Sometimes that noise disappears for 1-4 weeks, and then again appears for no reason and lasts from several days to weeks. That noise is always the same, and I tried adding tsched=0 to /etc/pulse/default.pa. Also tried this PositionReporting fix, with no effect. I also tried disconnecting all the cables and removing all electronic devices around laptop, but it has no effect. I also tried removing Pulse Audio, didn't change anything. Would be great if someone has some real solution for this problem.

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