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• while upgrading a virtual machine do I need to install a bootloader

  - by Bond

  I have a virtualization server which is having a few virtual machines running at top of it. All this was done using Ubuntu server edition with KVM and using virt-manager on SSH connection. These VMs are Lucid 10.04 64 bit Vms. When I upgrade them via apt-get upgrade on an SSH connection in between the ncurses screen, it asks me if it should install a bootloader and to select Yes or No for it. I have no clue what should I select here and I cancel the upgrade.Since it is a production machine I can not specify any thing like this. So let me know what will be a correct.

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• Satellite L640 Battery Applet Problem

  - by Dean

  Hayy guy i got a satellite l640 and i installed ubuntu 12.04 on it and i dont get the battery percentage ive tried a fair bit but this is my first time using linux. Ive gone into the power option and ive installed battery status apps and still i get nothing. There was one saying how much amps and what not the battery has and it all has 0.00 for everything, ive also tried the terminal cammands to see the percentage and that doesnt work. Is there anything i can do or should i just got back to windows.

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• Error while trying to dual boot Ubuntu alongside Windows 8

  - by Brian

  I recently purchased a new Toshiba Ultrabook that comes pre-installed with Windows 8. I'm trying to dual boot 12.10 with it and I have run into a problem with the installer. When I get to the page to pick the partitions I get this: No drives are listed and the only thing in that device drop down is /dev/sda. If I click Install Now or +/-/change I get an "Ubuntu has stopped working" error message. I'm trying to install off a 12.10 64-bit USB drive in UEFI mode, and I have tried it with secure boot both enabled and disabled with the same results. The hard drive set up is as follows: 500 GB main drive windows recovery (primary) EFI boot section (primary) Windows' partion (280 GB I believe) (primary) unallocated space I created for Ubuntu partition (200ish GB) another Windows recovery partition (primary) 12 GB solid state drive all unallocated space Could it be a problem with the number of primary partitions? I think I read somewhere about a max of 4.

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• Computer Arithmetic - Binary for Decimal Numbers

  - by MarkPearl

  This may be of use to someone else doing this course… The Problem In the section on Computer Arithmetic it gives an example of converting -7.6875 to IEEE floating point format. I understand all the steps except for the first one, where it does the following... 7.6875 (base 10) = 111.1011 (base 2) I don't understand the conversion - I realize that 111 (base 2) = 7 (base 10), but how does the .6875 part relate to the .1011? Or am I totally off track with this? The Solution The fractional part of the decimal to binary conversion is done as follows: 0.6875 x 2 = 1.375 = 0.375 + 1 (Keep the 1 separate) 0.375 x 2   = 0.75   = 0.75    + 0 0.75 x 2    = 1.5      = 0.5      + 1 0.5 x 2     = 1.0       = 0.0       + 1 The bit pattern of 0s and 1s on the right-hand side gives you the fractional part. So 0.6875 (base 10) = .1011 (Base 2) See also Stallings, chapter 19.

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• Dev Lop

  - by Jason Franks

  Back in the early 90s, before I was a professional geek--much less a geek with a blog--I saw this old chop socky movie. I don't remember what it was called, or who was in it... all I remember is that, in one scene, the venerable sensei tells the hero: "You must develop your nunchaku technique." This became a bit fo a catchphrase amongst my high school mates. Well folks, I am developing my technuique. This blog has been renamed and the old posts removed--I could go into my reasons for this, but that would defeat the point of the exercise. Sorry if you liked 'em. It has been a good couple of years since I wrote anything here, so I doubt that I am putting out any regular readers. Will I be posting here more often, now that I've renamed and rethemed the place? I don't know. In the meantime, check it out: Bruce Lee playign ping pong with nunchaku. --JF

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• Is there any difference between processor and core?

  - by Salvador

  The following two command seems to give me different information about the same hardware srs@ubuntu:~$ cat /proc/cpuinfo | grep -e processor -e cores processor : 0 cpu cores : 4 processor : 1 cpu cores : 4 processor : 2 cpu cores : 4 processor : 3 cpu cores : 4 srs@ubuntu:~$ sudo dmidecode -t processor # dmidecode 2.9 SMBIOS 2.6 present. Handle 0x0004, DMI type 4, 42 bytes Processor Information Socket Designation: LGA1155 Type: Central Processor Family: <OUT OF SPEC> Manufacturer: Intel ID: A7 06 02 00 FF FB EB BF Version: Intel(R) Core(TM) i5-2500K CPU @ 3.30GHz Voltage: 1.0 V External Clock: 100 MHz Max Speed: 3800 MHz Current Speed: 3300 MHz Status: Populated, Enabled Upgrade: Other L1 Cache Handle: 0x0005 L2 Cache Handle: 0x0006 L3 Cache Handle: 0x0007 Serial Number: To Be Filled By O.E.M. Asset Tag: To Be Filled By O.E.M. Part Number: To Be Filled By O.E.M. Core Count: 4 Core Enabled: 1 Characteristics: 64-bit capable Until today I thought I had a single processor with 4 independent cores. I also thought that within each core can be used different threads.

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• How to add a holding page in front of a domain

  - by Jason Bradberry

  I have set up a holding page to announce a new version of a website coming soon. I wanted people to still be able to access the original site, so my approach was to place the holding page in the root folder on the server, and move the original site to a subfolder and link to it from the holding page. However, on testing this setup it appears to have hurt the SEO placing of the website. Is there a better approach to this? I'm a bit stumped as I want both to share the same URL.

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• SOA Suite 11g Developers Cookbook Published

  - by Antony Reynolds

  SOA Suite 11g Developers Cookbook Available Just realized that I failed to mention that Matt & mine’s most recent book, the SOA Suite 11g Developers Cookbook was published over Christmas last year! In some ways this was an easier book to write than the Developers Guide, the hard bit was deciding what recipes to include.  Once we had decided that the writing of the book was pretty straight forward. The book focuses on areas that we felt we had neglected in the Developers Guide, and so there is more about Java integration and OSB, both of which we see a lot of questions about when working with customers. Amazon has a couple of reviews. Table of Contents Chapter 1: Building an SOA Suite ClusterChapter 2: Using the Metadata Service to Share XML ArtifactsChapter 3: Working with TransactionsChapter 4: Mapping DataChapter 5: Composite Messaging PatternsChapter 6: OSB Messaging PatternsChapter 7: Integrating OSB with JSONChapter 8: Compressed File Adapter PatternsChapter 9: Integrating Java with SOA SuiteChapter 10: Securing Composites and Calling Secure Web ServicesChapter 11: Configuring the Identity ServiceChapter 12: Configuring OSB to Use Foreign JMS QueuesChapter 13: Monitoring and Management

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• Placing of copyright notice in source code

  - by Diana Dcn

  I'm about to release a project of mine that I'm really proud of under the GNU GPL and I have some questions: Should one attach a copyright notice on each and every source code file from their project? I think it's a bit ridiculous to claim copyright on a 3 line abstract class. Should I attach a copyright notice only to really important source code files? Can I not attach the whole standard thingy? Because it's big and bulky and gets in the way... If so, is the variant below ok/enough? Copyright year firstname lastname. This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation.

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• Keyboard settings for a Mac+PC world

  - by Sahil Malik

  SharePoint, WCF and Azure Trainings: more information I’m one of those weridos who lives in a Mac+PC world. I write code for both iOS and Windows platforms. I also travel quite a bit, and airlines and airport security are starting to weigh your carry ons, and beginning to frown on the powerplant of batteries you need to carry to power SharePoint on an airplane. This means, my main work machine has to be a Macbook Pro, since it is the only machine that can do both XCode and Visual Studio Virtualized and SharePoint virtualized nicely. The problem this causes of course, is you will literally pull your hair out when dealing with keyboard/shortcut differences. So here is my work setup, Running Mac for all my normal work Virtualizing using VMWare Fusion – and sometimes I move these VMs to my windows server so I can run them on VMware workstation. Frequently RDP’ing into VMs in the cloud or running on my home server. So, Read full article ....

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• How to get scripted programs governing game entities run in parallel with a game loop?

  - by Jim

  I recently discovered Crobot which is (briefly) a game where each player codes a virtual robot in a pseudo-C language. Each robot is then put in an arena where it fights against other robots. A robots' source code has this shape : /* Beginning file robot.r */ main() { while (1) { /* Do whatever you want */ ... move(); ... fire(); } } /* End file robot.r */ You can see that : The code is totally independent from any library/include Some predefined functions are available (move, fire, etc…) The program has its own game loop, and consequently is not called every frame My question is: How to achieve a similar result using scripted languages in collaboration with a C/C++ main program ? I found a possible approach using Python, multi-threading and shared memory, although I am not sure yet that it is possible this way. TCP/IP seems a bit too complicated for this kind of application.

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• Is there a good way to get pixel-perfect collision detection in XNA?

  - by ashes999

  Is there a well-known way (or perhaps reusable bit of code) for pixel-perfect collision detection in XNA? I assume this would also use polygons (boxes/triangles/circles) for a first-pass, quick-test for collisions, and if that test indicated a collision, it would then search for a per-pixel collision. This can be complicated, because we have to account for scale, rotation, and transparency. WARNING: If you're using the sample code from the link from the answer below, be aware that the scaling of the matrix is commented out for good reason. You don't need to uncomment it out to get scaling to work.

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• Uploading a non-finished website

  - by Daniel

  I have a pretty basic question. I developed a neet little website wich I'm ready to upload, but still needs a bit of work. The designer needs the html to do his work so the website needs to be uploaded. Besides that, I have to correct a couple details, do the friendly-urls, etc. What's the best way to set up the webpage in the definitive hosting with the defintive domain, blocking it to any unknown users and without affecting affecting SEO and those kind of things. If I were to just upload it, the non-definitive website might be crawled by a SE-bot. Thanks!

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• React to a modified directory

  - by Ghanshyam Rathod

  In linux everything is considered as file, Now if I want to find only folders/directories not the files then how can i do that? I am getting all the modified files with the following command. find /Users/ghanshyam -type f -mmin -5 -print My goal is to generate the log file with all the modified/access folders. Here two options are available. create a module and call every time when a folder is modified (this one is bit difficult because I need to check particular event) create a cron task that will run after every 5 minutes. cron task will execute shell script and generate the log entries with the modified folders. Do you have any other option to do this task ?

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• How do I install my Wacom Intuos 2 serial tablet?

  - by Gizmoatwork

  I've seen many topics on the subjects but they are too complicated for me. I'm not confident in compiling stuff. Is there some headache-free way to make it work under Ubuntu? Where do I start? Edit : It doesn't seem to work. looking at device '/devices/pnp0/00:08/tty/ttyS0': KERNEL=="ttyS0" SUBSYSTEM=="tty" DRIVER=="" looking at parent device '/devices/pnp0/00:08': KERNELS=="00:08" SUBSYSTEMS=="pnp" DRIVERS=="serial" ATTRS{id}=="PNP0501" looking at parent device '/devices/pnp0': KERNELS=="pnp0" SUBSYSTEMS=="" DRIVERS=="" ACTION=="add|change", SUBSYSTEMS=="pnp", ATTRS{id}=="PNP0501", ENV{ID_INPUT}="1", ENV{ID_INPUT_TABLET}="1" ATTRS{id}==PNP0501, : commande introuvable I am a bit confused. Am I right to type it in the terminal?

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• Links for PrDC10 Session Visual Studio 2010 Testing Tools

  - by Aaron Kowall

  Here are the links I promised to post from my session on Visual Studio 2010 Testing Tools. To download and configure the TFS 2010 Virtual Machine the best instructions are here: http://blogs.msdn.com/b/briankel/archive/2010/03/18/now-available-visual-studio-2010-release-candidate-virtual-machines-with-sample-data-and-hands-on-labs.aspx To download and configure the Lab Management Virtual Machine, the best instructions are here: http://blogs.msdn.com/b/lab_management/archive/2010/02/12/one-box-lab-management-walkthrough.aspx Thanks to all that attended my presentation!  Hope you learned a bit. Technorati Tags: PrDC10,TFS 2010,VHD,Lab Management

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• How to add a link group to update-alternatives?

  - by Kurtosis

  Is it possible to add a custom link group to update-alternatives that is not already there by default? For example, I want to add Scala and all its supporting binaries as a link group 'scala'. I'm trying using this script, but keep getting the error: update-alternatives: error: unknown argument `' I'm not sure what that means, but after troubleshooting the script a bit with no luck, I'm wondering if update-alternatives has a hard-coded list of link groups, that can't be added to, and that doesn't include scala. PS - any chance someone with higher karma can create an update-alternatives tag? Seems this topic gets a decent number of questions, but no tag for it.

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• Stopping duplicate H1 and title from dynamic content

  - by codemonkey

  I have a web site where there are lots of dynamically (database driven) created pages. These pages are basically used to show uploaded images The pages look a bit like this URL: http://www.mywebsite.com/page-id/page-title/ H1: View from the sea This is a big issue because I might have 10 other pages with the title: 'View from the sea'. I know the simple solution would be to make sure the pages are named differently but I have lots of users on the web site so it's not that simple. What do you guys think to putting the page-id with the page-title in the H1 tag? So it might read 437 - View from the sea. I need to differentiate the h1 titles. I think using the page-id would help but if anyone has a better solution that would be great! Thanks in advance

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• Periodic clicking sound from PC speaker

  - by John J. Camilleri

  After an update some months ago, my laptop has begun making a low, repeated clicking sound every few seconds. It is not being generated through the regular sound system, as altering the volume and even muting the sound does not make any difference. My regular audio works fine, by the way, so I am guessing this is some sort of PC speaker, since I cannot hear the click when I listen through regular headphones. Strangely, when I open the sound settings dialog the click magically disappears. I don't need to change any settings; if I simply leave the dialog open in the background then the problem disappears. Any ideas what this could be? I am running regular Ubuntu 12.04, and this is the output from lspci -v | grep -A7 -i "audio": 00:1b.0 Audio device: Intel Corporation N10/ICH 7 Family High Definition Audio Controller (rev 02) Subsystem: Acer Incorporated [ALI] Device 0349 Flags: bus master, fast devsel, latency 0, IRQ 44 Memory at 54200000 (64-bit, non-prefetchable) [size=16K] Capabilities: <access denied> Kernel driver in use: snd_hda_intel Kernel modules: snd-hda-intel

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• Curious About Oracle's BI and Analytics Strategy?

  - by Bob Zurek

  Normally we use this blog space for discussing our business intelligence and analytic efforts along with our views and perspective on this very fast growing marketplace. However, I can't resist mentioning that we are having a great webcast coming up next week, so please do join Oracle's Mark Hurd and Balaji Yelamanchili as they unveil the latest advances in Oracle's strategy for placing analytics into the hands of every one of your decision makers-so that they can see more, think smarter, and act faster. Register now at http://bit.ly/HpAOJk for the Webcast and Live Chat: Wednesday, April 4, 2012 at 9 a.m. PT, 12 p.m. ET, 10 a.m. GMT.  You don't want to miss this event and thank you very much. 

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• Shared hosting banwidth limits

  - by mike

  I have a shared hosting account with a 20GB monthly bandwidth limit. I have exceeded my monthly limit and according to my host my counter is never reset, they say they use a continuous 30 day counter. So for example, I make payment on the 1st of each month, say I use 20GB in the last week of the month. My bandwidth counter is not reset on the 1st of the new month and my bandwidth will only become available in the last week of the new month. Is this common practice by shared hosting companies? Sounds a bit shady to me. Surely my counters should be reset on the 1st of every month when I make payment and 20GB of bandwidth should be available from the day payment is made?

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• Artist, Looking to lean how to program games, where do I start? [on hold]

  - by Christopher Hindson

  I have bean an artist for many years now I am very comfortable with using Photoshop and Flash but I want to learn how to but together my own games, I bean doing my own research into this and at the moment I am at little bit stuck on witch direction to go down. So my question is witch programming language should I learn? I have already bean looking into this what i understand is that Gamemaker with its built in language (GML) is one of the most friendly to people who are new to the game making world. I have played around with this program and was pretty happy with it but I want more also you can use Unity with language such as C and javascript and then games built with Java witch looks interesting. One more thing before you send your answer in at this moment in time I would only be able to make 2D game but 3D isn't out of the picture.

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• gnome-shell, gnome 3, unity, cinnamon, mate confusion

  - by Bryan

  I am thinking about adding something besides unity into my ubuntu 12.04. My questions are this: -If I add cinnamon, mate, gnome2/3, could I still call it it Ubuntu, or would it be Mint? -Why not just add Mint instead of cinnamon, or mate, into Ubuntu? -Or is Mint just those at the core, and not the other way around? -I had terrible battery drain using Mint. Something was wrong with the kernel with my laptop type. If I add cinnamon, would I get that battery drain again? -And lastly, would I be able to get that awesome HUD if I add the other things? I realize these questions are a bit confusing, or at least they are for me.

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• Where are the systray icons for Dropbox in Ubuntu desktop 13.04 (minimal)?

  - by samvv

  I reinstalled Ubuntu desktop using the minimal CD image and the following command: $ sudo apt-get install ubuntu-desktop --no-install-recommends After that I used Ubuntu Software Center to make sure Unity supports application indicators: http://i.imgur.com/bYF162w.png. Everything works great, except for Dropbox. For some reason the icon doesn't appear in the tray, even though the application is running. Steam on the other hand runs just fine, so it seems like there is nothing wrong with the tray itself. According to this post the tray icons should be in /usr/shared/icons/hicolor/22x22/status but it doesn't contain any Dropbox icons. Neither do any of the other resolutions. The answer is a bit outdated, so I'm not entirely sure it is still applicable to the current version of Dropbox. I did the usual thing of reinstalling dropbox with: sudo apt-get purge nautilus-dropbox sudo apt-get install nautilus-dropbox But that didn't solve anything either. Does somebody know how to fix this issue?

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• Question about Partitioning

  - by Trent C

  I am looking to dual boot Windows 7 and Ubuntu 13.10. I have been using windows for work and school for over a year, and have about 100 gig of stored files (backed up of course) and some paid programs. Because of this, I really want my partitioning experience to go well. Unfortunately, I am running into a bit of an anomoly When I load GPart, I see that my sda drive is unallocated http://i.imgur.com/Hi2XhIr.png Whereas my sdb appears to contain all of the windows files and partitions, and make up my C: drive http://i.imgur.com/aaCOXje.png Is this going to be an issue, as all literature on dual boot installation references sda? How do I work around it? System Info: Lenovo IdeaPad Y570- 750GB HDD with 64GB SSD Processor: Intel® Core™ i7-2670QM CPU @ 2.20GHz × 8

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