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• OS-Prober not recognized!

  - by WindowsEscapist

  So due to some shenanigans with trying to get rid of all traces of grub-customizer, I accidentally hit "delete" an extra time while in a root nautilus, and deleted my os-prober script in /etc/grub.d/30_os-prober. So I was about to freak out and come here without doing anything when I realized that everything should be beack if I ran sudo apt-get purge os-prober and then sudo apt-get install os-prober. No dice! It was still gone! So I ran the same purge/reinstall thing on grub2. Nope! I have copied over another 30_os-prober from another Ubuntu install (same version and architecture), and it works when run in terminal by typing sudo os-prober, but it isn't picked up when running sudo update-grub. Help!

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• Turbo C++ to Visual Studio 2010 migration [closed]

  - by BigGenius

  OK, based on my previous questions and your help., I have gone to install Visual Studio Express. But now problem is, the programs which I successfully code at home on Visual Studio don't run on Turbo C++ compiler at school (assuming I type the program instead of exporting code). Is there anything I can do? Also I am just learning basic syntax and data handling, loops, structures, arrays and all. But Visual Studio has auto completion and pretty typing (which may be advantageous) but crap for a beginner getting hold on to language. Sorry, if I have been unclear. But what should I do? This will make me lazy programmer and will reflect in my grades. Is there any other IDE, which I can use, very similar to Turbo C++ and able to run in Windows 7 in fullsreen mode.

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• component Initialization in component-based game architectures

  - by liortal

  I'm develping a 2d game (in XNA) and i've gone slightly towards a component-based approach, where i have a main game object (container) that holds different components. When implementing the needed functionality as components, i'm now faced with an issue -- who should initialize components? Are components usually passed in initialized into an entity, or some other entity initialized them? In my current design, i have an issue where the component, when created, requires knowledge regarding an attached entity, however these 2 events may not happen at the same time (component construction, attaching to a game entity). I am looking for a standard approach or examples of implementations that work, that overcome this issue or present a clear way to resolve it

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• How can I login to lightdm with password for fingerprint-enabled user after 12.10 upgrade?

  - by jxn

  Sorry for the long question. I have a laptop with ubuntu quantal 12.10, a fingerprint scanner, and a few active user accounts. When the machine boots up to lightdm, I get a prompt toenter my password or scan my finger print. Every now and then, fingerprint scanning just doesn't seem to work. Before the 12.10 upgrade, I was always able to enter my password for this user when fingerprint failed. Now, no matter what, I have to scan my prints to login as this user. If I try to login as a different user (fingerprint is not enabled for any others), I can see the password is typed out -- asterisks show in the password input box as I type them -- and get in. Not so for the fingerprint user. Any clues on how to figure out what's gone wrong?

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• Are there any "traps" in cloning a VirtualBox VM for concurrent use on the same Host/LAN?

  - by fred.bear

  With Ubuntu as the Host, I want to run two similar/identical(?) instances of a VirtualBox Guest on the same Host, or perhaps on another Host which is on the same LAN... I have set up a Guest as a "base" for the two clones. I have exported it as an ovf appliance. I've imported this "base" guest OS back into VirtualBox, with a unique name and .vdk ... and I have started them both on the same Host, and all seems okay, but I do wonder if I have missed some significant point. ...eg. Is the virtual NIC the same? this would throw the LAN into confusion (I think)... and what about UUIDs? I haven't actually tried 2 clones together, yet... only the original and one clone, but I haven't gone beyond a simple startup ...

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• Configuring 12voip with a sip softphone in Ubuntu

  - by Joey

  I want to change my work PC to Ubuntu but one thing is in my way... We use 12voip since we didn't find lower calling rates in Europe. The thing is 12voip doesn't have a Linux program :-(. I tried to set it up with instructions from this page (under 'Software configuration') with almost all clients that the software center of Ubuntu offers, but the best results i got to had a lot of echo. Now i must admit this echo exists also with the Windows version of the program, but there- once you use headphones its gone, while on the Ubuntu sip phones it stays and its worst in general. I don't know if my problem has to do with codecs or something else, and i was hoping someone can help check it and tell me which sip phone i can work with, and instructions on how to configure it correctly. Btw i tried Google, and all i could find were questions like mine or similar, no good answers. Thanks!

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• Bluetooth refuses to connect since update to Ubuntu Gnome 13.10

  - by Niklas Berg

  I can no longer connect to my bluetooth speakers since since upgrading to Ubuntu Gnome 13.10 and then Gnome shell to 3.10, which never were a problem with Ubuntu Gnome 13.04. My bluetooth-dongle seems to working fine and I can even detect and add the speakers (Creative D100) but when I try to slide the button from off to on in the bluetooth settings it just slides back to off. The "bluetooth-B" in the upper right corner is also gone. I actually managed to connect after I added "Enable=Socket" under "[general]" /etc/bluetooth/audio.conf and the indicator on the speakers confirms the connection, but I cannot find the speakers in the audio settings even then. I've tried to solve this for several days, reading tons of other possibly related questions here on ask ubuntu and elsewhere but am unable to find a solution. Any ideas?

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• Replica Myst Book Actually Plays all the Myst Games

  - by Jason Fitzpatrick

  Runaway 1990s gaming hit Myst features books that had the power to transport you to other worlds. One dedicated fan has gone so far as to make a book that, when opened, transports you to the Myst universe. From hand-crafting the book itself to populating the guts of the book with carefully selected (and frequently modified) parts, Mike Ando left no part of his project uncustomized. The end result is a stunning mod and tribute to the Myst franchise–a beautiful book you can open and play through all the games in the series. Check out the video above to see it in action then hit up the link below to check out Mike’s build album. Myst Book [via Hack A Day] What Is the Purpose of the “Do Not Cover This Hole” Hole on Hard Drives? How To Log Into The Desktop, Add a Start Menu, and Disable Hot Corners in Windows 8 HTG Explains: Why You Shouldn’t Use a Task Killer On Android

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• Very good book for learning ADF

  - by kishore.kondepudi(at)oracle.com

  Am back!!!Its been a long time i have penned in here.Past month i got a bit Androided ;) with my new Captivate and experiments with Android.I promise to give looots of things coming weeks.Before that i have been getting many comments and mails from people interested in learning ADF to suggest a god book.While there aren't many out in the market now,the one by Frank Nimphius is very very good.I have gone through the book and its very apt for learning and getting to know the horizon of ADF.It has almost everything from Model,UI,Skinning,Internationalization,Security,Reusing lots and lots of ADF stuff.I recommend the book for all beginners and learners for ADF.In case you are in India you can order it to your home from flipkart directly.Here is the listingThere are two versions of the same book one is an international edition and another one is indian print from TMH.The cost is 585/- rupees for the indian one.The book is titled Oracle Fusion Developer Guide: Building Rich Internet Applications With Oracle ADF Business Components & ADF FacesEconomical price and an excellent book.Grab yours now and plough ADF ;)

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• Bridging: Loosing WLAN network connection with 4addr on option - Why?

  - by WitchCraft

  Question: For use with my Xen VM, I need to create a virtual network interface (vif) that is bridged to wlan0. If in /etc/network/interfaces I add auto xenbr0 iface xenbr0 inet dhcp And then later do brctl addif xenbr0 wlan0 I get this error message. can't add wlan0 to bridge xenbr0: Operation not supported I found out that Linux won't let you bridge a wireless interface in managed mode at all unless you enable the 4addr option (needed to recompile iw): iw dev wlan0 set 4addr on Afterwards brctl addif xenbr0 wlan0 works, and brctl show shows xenbr0 as bridged to wlan0. Unfortunately, as soon as I execute iw dev wlan0 set 4addr on my entire network connection is gone (no connection). As soon as then I execute iw dev wlan0 set 4addr off I reconnect and it works again. If I re-execute 4addr on, it breaks again, if I execute 4addr off, it works again. Unfortunately, I can't just turn 4addr on, activate the bridge and then turn it back off (error: device not ready). Does anybody know why I loose my connection ?

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• Connecting Windows 7 to legacy Linux Samba share

  - by bconlon

  I have had to rebuild my Windows 7 PC and all has gone fairly well until I tried to connect to a Samba share on a legacy Linux box running Redhat 8. No matter what combination of domain / user /password I would just see the same message of: "The specified network password is not correct." This is a misleading error, very annoying and a little confusing until I found a hint that Windows 7 default authentication was not supported on older Samba implementations. I guess I figured this out once before as it used to work before the rebuild! Anyway here is the solution: 1. Control Panel->System and Security->Administrative Tools->Local Security Policy (or run secpol.msc). 2. Select Local Policies->Security Options->Network security: LAN Manager authentication level. 3. Select 'Send LM and NTLM - use NTLMv2 session security if negotiated' and click OK. #

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• Eclipse Juno, need root access everytime I change the configuration

  - by veepsk

  I am trying to install eclipse Juno on 12.04. I did all the things instructed in this link. But whenever I install any new software (Say CDT or Pydev) on Eclipse, the new softwares are gone upon opening the Eclipse app again. I then have to open Eclipse again with root privileges to install all the software. I also ran into many problems with linking the include library for Eclipse CDT. Can anyone help me with installing Juno in a way that I do not need root access every time I change configurations in Eclipse?

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• Adding IP address to OpenVZ VPS (OpenVZ Web Panel)

  - by andy

  I apologise if I sound at all dumb. This is my first dedicated server having used a VPS for over a year and I'm trying to setup a VPS on this new server. I purchased a subnet from my hosting provider that I believe allows me 6 usable IP addresses: 177.xx.xxx.201 - 177.xx.xxx.206 The subnet address looks like this: 177.xx.xxx.200/29. I've gone on my server and added them like it said on a wiki like so: ip addr add 177.**.***.201/29 dev eth0 I done that for all six and now when I go to them in the browser they point to my server. The problem is, I'm using OpenVZ web panel to create VMs (http://code.google.com/p/ovz-web-panel/) so I created a VM and assigned one of those IPs to it. However when SSHing to that IP it SSH's to the dedicated server and not the VM. Am I missing something?

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• Error 107 (net::ERR_SSL_PROTOCOL_ERROR): SSL protocol error on localhost

  - by Ne0

  Background: I set up a cloud server and have have a website running SSL, it was all pretty strait forward following these instructions and following the instructions given by the SSL certificate issuer. I then went to set up development site on my local machine the same way but using self signed certs using these instructions. I have checked that port 443 is open and this post suggests it is a bad configuration on the server. I have gone through the set up process twice, yet I have been unable to find out what I have done wrong or missed. Does anyone else know what I may have have missed to get this error? Note: As the links suggest this is on 12.04.

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• New Computer

  - by Matt Christian

  Last night I received my computer that was ordered with my tax return money.  Here are the specs of my old computer: - Pentium 4 Processor - 3-4 GB RAM - ~256 GB HDD space (2 drives) - nVidia card (AGP 8x) Sorry I can't be more specific, my memory is gone :p  Here are the new computer specs (mostly): - 2.8ghz Pentium i7 quadcore - 6 GB RAM - 1 TB HDD space (1 drive) - 1 GB Radeon card (PCI-X) I also got a new monitor (22" Asus with HDMI) so will be using my 19" widescreen as a secondary monitor. If I remember I'll hop on here and post the specifics later on...

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• Ubuntu Oneiric + Awesome WM

  - by janjust

  I upgraded to oneiric ocelot, running awesome wm. Everything works, more or less, fine but one thing I've noticed is that now my menu fonts and my menu symbols are larger than I'd like them to be. I used to set them in font settings, but now (for one I don't even know where font settings are anymore, I tried gnome-tweak-tool) the font-settings are gone? Surely I'm missing something. My prime example is the program evince whose symbols are ginormous. Any hints how to tweak it?

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• Linux kernel 3.5.0-18 update is not working with NVIDIA driver 304.60

  - by Janos Fejos

  I have Ubuntu 12.10 64 bit and a Nvidia card GT430 and installed 304.60 Linux driver manually and it worked beautifully until the latest Ubuntu update which got modified to 3.5.0-18 Kernel. Everything has gone: launcher, windows I can't move them it got USELESS. I tried to run the previous kermel 3.5.0-17 with which the driver was working well. I gto the same desktop. USeless - So the problem is something else I guess but it has to do with the update that's for sure- Any idea what to do? Now I have to switch back to Windows 7 which I don't want in order to able to work until an update will come up.

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• How do I remove webapps completely?

  - by user104106

  I'd like to be able to remove webapps from my system, I don't want any of the packages associated with it. But trying to remove it I am told there are several other packages that require it. Please change this, I don't like the idea of webapps and I want it gone. I'm tired of getting annoying popups that don't explain anything asking me to install something! It feels like a huge security breach and the user is given no information as to what they are choosing. This is a very bad decision on Canonicals part. I should be working for them, something like this would never ship.

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• What are the best resources for learning about concurrency and multi-threaded applications?

  - by Zepee

  I realised I have a massive knowledge gap when it comes to multi-threaded applications and concurrent programming. I've covered some basics in the past, but most of it seems to be gone from my mind, and it is definitely a field that I want, and need, to be more knowledgeable about. What are the best resources for learning about building concurrent applications? I'm a very practical oriented person, so if said book contains concrete examples the better, but I'm open to suggestions. I personally prefer to work in pseudocode or C++, and a slant toward game development would be best, but not required.

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• Starting off with web dev with php

  - by pavan kumar

  I'm currently working with Java / C++. I'm interested in web development and am planning to shift my stream. I heard that PHP is a good platform to start off and also it does not require that much of knowledge in technologies like JSP / Servlets or frameworks like springs / struts / hibernate. I have basic ideas about HTML and Javascript as well. I have gone through previous posts in SO and found out the relevant resources as well: http://net.tutsplus.com/tutorials/php/the-best-way-to-learn-php/ http://www.webhostingtalk.com/archive/index.php/t-1028265.html http://www.killerphp.com/ http://phpforms.net/tutorial/tutorial.html http://www.php5-tutorial.com/ etc. Now, my question is: I heard of PHP frameworks like CodeIgniter, Zend Frameworkd and Yii. Doesn't learning PHP & MySql implicitly makes us aware of these frameworks? Am I making a good choice in stating with PHP? Is it a good idea to shift streams?

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• HTG Explains: The Linux Directory Structure Explained

  - by Chris Hoffman

  If you’re coming from Windows, the Linux file system structure can seem particularly alien. The C:\ drive and drive letters are gone, replaced by a / and cryptic-sounding directories, most of which have three letter names. The Filesystem Hierarchy Standard (FHS) defines the structure of file systems on Linux and other UNIX-like operating systems. However, Linux file systems also contain some directories that aren’t yet defined by the standard. How to Make Your Laptop Choose a Wired Connection Instead of Wireless HTG Explains: What Is Two-Factor Authentication and Should I Be Using It? HTG Explains: What Is Windows RT and What Does It Mean To Me?

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• 13.04 Gnome - removing icons from lower panel

  - by Mikey

  I use the stripped down Gnome UI for 13.04 (Gnome-no effects) and on the bottom there is a panel where you can put icons for app launchers, by dragging them from applications menu. This is probably a really dumb question, but I can't figure out how to REMOVE a launcher icon from that panel once I put there! How is this done? Note - I saw another answer that said click alt-super and right click on top panel - I clicked remove launcher and now my top Application and Places menus are gone! How do I get them back - all screwed up now.

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• Keyboard problems on Acer Laptop

  - by artfulrobot

  The key map on my Acer Aspire 5750 keyboard has gone awry since I had the keyboard replaced (because of physical fault with one of the keys). The new keyboard looks identical, but now Ubuntu seems a little confused about which (function) buttons are which. So previously Fn+left/right were, as marked on the keys, brightness up and down; Fn+up/down were volume. It all worked as advertised! But now Page Dn (which is marked as Page Dn or Back a track with Fn) is turning the volume up, and the others fn+arrow keys don't work at all. Is there a way I can see what's happening or get it to re-map my keys? Thanks.

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• New JDeveloper/ADF book hits the bookshelves

  - by Grant Ronald

  I've just received a nice new copy of Sten Vesterli's book Oracle ADF Enterprise Application Development - Made Simple.  I was one of the technical reviewers of the book but I'm looking forward to be able to read it end-to-end in good old fashioned book format this coming week. The book bridges the gap between those existing books that describe Oracle ADF features, and real world ADF development.  So, source control, bug tracking, estimating, testing, security, packaging etc are all covered.  Of course, every project and situation is different so the book could never supply a one-size-fits-all guide, but I think its a good addition to your ADF bookshelf.  I'll hopefully post a full review in the coming weeks. Oh, and congratulations Sten,  having gone through the pain of writing my own ADF book, I take my hat off to anyone who goes through the same journey!

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• always purge on remove in package

  - by Jeroen

  Is there a way I can set my package to always automatically include a --purge whenever a user does a regular apt-get remove mypackage ? The reason is that I have some config files in /etc that should really be removed when the binaries are removed, otherwise it can lead to weird behavior. However I still want to treat them as conf files, i.e. make sure apt does not just wipe them on every upgrade of the package. But they should be removed when the package is uninstalled. Currently I am manually deleting the /etc conf files in my postrm script. However I just found out that this has a unfortunate side effect: if the user uninstalls and then later re-installs the package, the conf files won't be reinstalled, because apt thinks that they are still there. So is there a way I can manually trigger a full 'purge' in my postrm, such that apt knows that the conf files are gone?

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