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• How to install wvdial without getting the following error?

  - by chndn

  When I ran the command: sudo apt-get install wvdial I got this error message : error p@p:~$ sudo apt-get install wvdial Reading package lists... Done Building dependency tree Reading state information... Done Package wvdial is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source E: Package wvdial has no installation candidate p@p:~$ So how can I install wvdial? I don't have access to internet from Ubuntu for direct installation. Please help

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• In practice, what are the key differences between Heroku and webfaction? [closed]

  - by jdotjdot

  I've been building and hosting webapps, mainly in Django and Flask, for some time now. Mainly, I've been hosting them on Heroku, because of the free tier and the ease of git-enabled application updating. I have seen that a lot of Django users prefer Webfaction. I looked through their offerings, and they seem to me like a standard web hosting service. Questions: Why might be webfaction considered a good hosting service for Django apps? If Heroku is generally called a "Platform-as-a-Service," what does that make Webfaction? Does it have any important similiarities/distinctions from Heroku that I might somehow be missing?

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• XRegExp Regular Expression Library for JavaScript

  - by Jan Goyvaerts

  XRegExp is an open source JavaScript library. It extends JavaScript’s regex syntax with features such as free-spacing, named capture, mode modifiers, and Unicode categories, blocks, and scripts. It also provides its own test(), exec(), forEach(), replace(), and split() methods that eliminate most cross-browser inconstencies and bugs. Anyone using non-trivial regexes in their JavaScript code should seriously consider using XRegExp. Last month’s update of the Regular-Expressions.info website added full coverage of XRegExp to the regex tutorial and regex reference sections. But the tools & languages section was missing the XRegExp page, resulting in broken links in the tutorial and reference sections. This page has now been added.

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• Usefulness of the Backlinks shown in Webmaster Tools

  - by Ewan Heming

  Is the list of links for a site shown in Google Webmaster Tools a complete list or just a sample? I've noticed that the links in there appear to be all the ones I didn't think would have any real value - either because they were nofollow or from irrelivant sites. The few I did think would be some use have never shown up and there's also some links that are sometimes there and sometimes not (such as my linkedIn profile). Does this mean that the missing links don't/no longer carry any value? It almost appears that the list is there for Google to either inform you about problems (there was a useful list there when someone tried to SPAM my site) or mis-imform you about which link-building strategies work or not (to keep people guessing about what works or not).

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• I loose some directories when i upgrade from Ubuntu 11.10 to 12.04

  - by maythux

  last day i upgraded my ubunut 11.10 desktop to ubuntu 12.04. I was running a KVM virtual about 7 machines and managed by virt-manage software.... anyway when i finished upgrading i found that virt-manager is not working so i have to reconfigure it again and install some other missing packages that was deleted!!!! anyway i solve this issue...then i started to restore my virtual machines i restore 2 machines without any problems the third and fourth ones (windows) make a check disk that takes more that 6 hours but finally it works... other machines i cant find their attached hard disks i don't know what happens but i cant found that files. 1- upgrading delete files!?!! 2- Is there anyway to restore those files? thanks in advance

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• DVC101 Video Capture Device on USB hub - Ubuntu Server 12.04

  - by John

  I have a Dell Inspiron 8600 laptop I use as a media server/video capture system. It only has 2 USB ports and I have a total of 3 devices I need to connect. The DVC101 works perfectly while plugged directly into the USB port in back of the laptop. Unfortunately it does not get recognized when plugged into a passive or powered USB hub. Questions: Is there something I am missing on the Ubuntu side? Something I need to do that will allow the device to be recognized through the hub? If not, will the extra USB ports on a dell laptop dock (port replicator) act the same as the aftermarket hubs? I know this one is off topic of Ubuntu but any input appreciated.

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• How can I rescue a Lubuntu install?

  - by Ghost

  Quick recap: I was having a problem with hibernation so I check and the linuxswap partition is missing, showing an "unknown" chunk of drive where it was. Happened before, booted to the liveCD and used Gparted to reformat that partition back to swap. Then I boot........F---- grub rescue... MBR took care of the problem, except that now I'm back to Windows only. EVERY guide out there makes me reinstall Lubuntu from scratch, a waste of time considering it will take me at least a day to reinstall everything there. Can't I just fix grub like I did with the win MBR?

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• How can I install Ubuntu (SO many problems)

  - by Dragos

  I have a question, my friend tried installing Ubuntu on my notebook (Asus g75v) and nothing tried, at one point he went past the installation screen and every he used the mouse the screen flickered and the driver crashed (I assume) and it would go back a step, I heard that there is way to install ubuntu without any graphics, maybe that will help me with the screen flickering (I have a gtx 670m), so we tried WUBI installer, I tried installing with that and it gave me a Wubildr.mbr missing error, so I gave that up after several times, although I do notice that I have an intel driver, and I keep downloading AMD versions, does that effect anything? I'm having trouble installing Ubuntu and I wish to be able to run it on my laptop, I want to learn this OS and I cannot even install it, I am a bit concerned, if anyone can back at me with any answer at all, please don't hesitate to post, just please don't post if you don't know what's going on, thanks for listening! ~cheers -Dragos

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• Storing a Hex Grid

  - by Pedro Caetano

  I've been creating a small hex grid framework for Unity3D and have come to the following dilema. This is my coordinate system (taken from here) Link because I'm a new user It all works pretty nicely except for the fact I have no idea how to store it. I originally intended to store this in a 2D array and use images to generate my maps. One problem was that it had negative values (this was easily fixed by offsetting the coordinates a bit). However, due to this coordinate system, such an image or bitmap would have to be diamond shaped - and since these structures are square shaped, this would cause a lot of headaches even if I hack something together. Is there anything I'm missing that could fix this? I recall seeing a forum post regarding this in the unity forums but I can no longer find the link. Is writing a set of coordinate translators the best solution here? If you guys think it would be helpful, I can post code and images of my problem.

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• What diagrams, other than the class diagram and the workflow diagram, are useful for explaining how an application works?

  - by Goran_Mandic

  I am working on a small Delphi project, composed of two units. One unit is for the GUI, and the other for data management, file parsing, list iterating and so on.. I've already made a class diagram, and my workflow looks like hell- it's too complex, even for anyone to read. I've considered making a dataflow diagram, but it would be even more complex. A use case diagram wouldn't be of use either. Am I missing some diagram type which could somehow represent the relationship between my two units?

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• Options for secure git -repo hosting?

  - by hhh

  I need a secure git -repo host, either by third-party or by myself. I am not sure how so outlining some ideas. Please, answer how you manage git -repos securely -- do you use some service or do you use only your 'legs' -approach? Afaik Bitbucket.org and Github.com are missing Gmail -style second-verification. Now I need this kind of login-system with password and mobile-phone to access the administration things in the git -hosting or ability to disable this kind of access without private -key. Host it oneself (not sure about details) other? Perhaps related http://stackoverflow.com/questions/11007679/how-can-i-host-git-repositories-and-manage-my-content-hosting-myself

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• ATI graphics card, with gnome shell, screen flickers

  - by bioShark

  After installing gnome shell, without any problem, after log in the fonts are missing and it looks like crap...nothing is readable. Don't want to make it a double post, because my issue is similar to the one from this question but for me the problems have not been solved properly. After running the commands from that post, and installing the latest AMD 11.10 driver, the Gnome shell display issues have been solved. But each time I move the mouse in the upper left corner, to bring up the applications...my entire screen flickers. Without the applications been displayed, everything looks fine. Hardware: ATI HD4870, Intel Q6600.

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• Installling a brother printer in Ubuntu 12.04 (MFCJ6510DW)

  - by Gelterfinger

  I am trying to install a Brother MfCJ6510DW printer on Ubuntu 12.04. I have tried various ways, but nothing woks for me. I have downloaded the drivers from the solutions brother.com I tried to install from the "System setting- printing" on the pull-down menu. There I get the message "failed to read PPL file - it says something about a missing Asterisk in colum1 Line 1 In the terminal I get the message cannot find file or directory. Under localhost:631/printer, I get the message " no such file or directory" I tried to install the file I downloaded from the Brothers Solution Center on the Ubuntu Software Centre, there I get the message " The package is of bad quality" Help I downloaded Mfcj6510dwlpr-3.0.0-1.i386.deb and mfcj6510dwcupswrapper-3.0.0-1.i386 I also downloaded linux-bprinter-installer-1.0.0-1.gz, but this does not help either.

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• Is there a good reference manual for ruby/rails?

  - by Kevin

  I've found switching from Java to Ruby/Rails to be very difficult. I feel like the rails books and websites that I've seen are program by example, and I have yet to see anything like a complete reference. In the java/spring world there is plenty of examples but also very thorough reference manuals. So even though I can get toy application xyz up and running in an afternoon with rails I'm apprehensive about doing anything of significance. I'm willing to admit that maybe this is because I've done java/spring for a few years and have near zero experience with ruby/rails. Just wondering if anyone else has run into this or if I'm missing something.

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• Public versus private inheritance when some of the parent's methods need to be exposed?

  - by Vorac

  Public inheritance means that all fields from the base class retain their declared visibility, while private means that they are forced to 'private' within the derived class's scope. What should be done if some of the parent's members (say, methods) need to be publicly exposed? I can think of two solution. Public inheritance somewhat breaks encapsulation. Furthermore, when you need to find out where is the method foo() defined, one needs to look at a chain of base classes. Private inheritance solves these problems, but introduces burden to write wrappers (more text). Which might be a good thing in the line of verbosity, but makes changes of interfaces incredibly cumbersome. What considerations am I missing? What constraints on the type of project are important? How to choose between the two (I am not even mentioning 'protected')? Note that I am targeting non-virtual methods. There isn't such a discussion for virtual methods (or is there).

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• Slow transfer to external USB3 hard drive

  - by JMP

  Trying to backup data from hard drive before reloading windows following some issue with its load. Having trouble with the file transfer to a USB3/2 external hard drive NTFS. Getting transfer speed of about 116.7kB/sec. In other words its taking about 5 hours to transfer 1.4GB. I've got about 80GB to go. So the transfer is going to take 11days. Seems a little on the slow side. Am I missing something? Is there a way to make this faster. No issue with the external drive transferring this amount in windows. But don't have that option at the moment.

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• When designing a job queue, what should determine the scope of a job?

  - by Stuart Pegg

  We've got a job queue system that'll cheerfully process any kind of job given to it. We intend to use it to process jobs that each contain 2 tasks: Job (Pass information from one server to another) Fetch task (get the data, slowly) Send task (send the data, comparatively quickly) The difficulty we're having is that we don't know whether to break the tasks into separate jobs, or process the job in one go. Are there any best practices or useful references on this subject? Is there some obvious benefit to a method that we're missing? So far we can see these benefits for each method: Split Job lease length reflects job length: Rather than total of two Finer granularity on recovery: If we lose outgoing connectivity we can tell them all to retry The starting state of the second task is saved to job history: Helps with debugging (although similar logging could be added in single task method) Single Single job to be scheduled: Less processing overhead Data not stale on recovery: If the outgoing downtime is quite long, the pending Send jobs could be outdated

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• How to repeat a POST request using Chrome's developer tools?

  - by Luke The Obscure

  Not sure if this is the right stack exchange to ask this, but here goes... I'm trying to wean myself off of Firebug, which has served me very well for a lot of years. One feature that seems to be missing in Chrome's dev tools is the ability to repeat an AJAX POST. In firebug I can right click on the request in the console and hit "Open in new tab" and the request is repeated exactly as it was originally sent. In Chrome, the same action just does a normal GET on the link, without any of the post data. Is there any way to repeat an AJAX POST in Chrome's dev tools?

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• Macbook Pro (2011) Install of 12.10

  - by William Fleming

  I have installed Ubuntu on another partition on my macbook only to find when i boot using refit im greeted with a screen that reads Missing Operating System I have chosen to install grub on the root partition so i assume after the EFI boot-loader has done its stuff it will then load grub in the " / " partition. Any thoughts on this i couldn't find anyone with this problem. I can only assume its a problem with the GRUB install on the partition. But i have tried to reinstall it and it did not work....? Any thoughts would greatly appreciated. Bill

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• Read the Comments!

  - by Bob Porter

  Originally posted on: http://geekswithblogs.net/blogofbob/archive/2013/06/18/read-the-comments.aspxSorry, I have been lax in posting for quite some time. Hopefully this will be the start of a renewed posting binge! A piece of advice, if you are searching for a solution to an issue, or a recommendation, or anything else on the web, when you find a post or a forum thread do 2 things.  First, check the date on the post of thread. If it is older it may no longer be fully up to date and or inaccurate. Bear that in mind.  Second, READ THE COMMENTS! Often small omissions or other issues in the post itself are resolved in the comments. If the solution to your issue does not appear to work check the comments. There may be a step missing or something else relavent that was raised by a prior reader or the author themselves. Cheers, Robert Porter

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• ubuntu 14.04 - only performance and powersave governor available (i5 4.gen)

  - by kinske

  After updating my ubuntu 13.10 to 14.04 there only these to govenors available for my cpu, instead of additionally ondemand and conservative. cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors performance powersave My cpu is a Intel(R) Core(TM) i5-4200M CPU @ 2.50GHz, my laptop a LENOVO B5400 80B6QB0 and my kernel version is 3.14.1-031401-generic x86_64 Before updating the four governors were available. If this is important, I have installed tlp and indicator-cpufreq. How do I get back the missing two govenors? ondemand is really important to me because of power saving.

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• what is the purpose of arrows?

  - by Simon

  I am learning functionnal programming with Haskell, and I try to grab concepts by first understanding why do I need them. I would like to know the goal of arrows in functional programming languages. What problem do they solve? I checked http://en.wikibooks.org/wiki/Haskell/Understanding_arrows and http://www.cse.chalmers.se/~rjmh/afp-arrows.pdf. All I understand is that they are used to describe graphs for computations, and that they allow easier point free style coding. The article assume that point free style is generally easier to understand and to write. This seems quite subjective to me. In another article (http://en.wikibooks.org/wiki/Haskell/StephensArrowTutorial#Hangman:_Main_program), a hangman game is implemented, but I cannot see how arrows makes this implementation natural. I could find a lot of papers describing the concept, but nothing about the motivation. What I am missing?

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• wordpress restored from backup asking for ftp

  - by Siddharth

  I backed up my /var/www/wordpress folder to my external harddisk and restored it back. Now when I add a new plugin I am asked for ftp access to my localhost. I wonder why ? As far as I could go /var/www/wordpress and its subfolders/files are own'ed by root. I have logged in to my wordpress as admin root. I dont know why I need to setup ftpd, but I tried that too. "http://askubuntu.com/questions/14371/how-to-setup-ftp-to-use-in-locally-hosted-wordpress" I am missing something really silly here.

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• Help file formats - MSHA files v CHM files

  - by TATWORTH

  Recently I was tasked with producing a help file from a C#/WPF/Crystal Reports application using Sandcastle. I have previously blogged about the problems in doing that and the change that is going into the next version of Sandcastle that allows the vagaries of Crystal (this missing BusinessObjects.Licensing.KeycodeDecoder) to be handled. At http://social.msdn.microsoft.com/Forums/en-US/devdocs/thread/0b110502-f5bb-4c56-96a5-4347a2a7a68a/, I describe how I tried each of the formats. Two of the formats could not be built and the error messages were not exactly helpful as to the cause. These two formats turned out to be obsolete. The MSHA format worked but was not suitable for a standalone application, so that left me with the older CHM format. I therefore asked on that thread "will the HTML Help 1 (CHM) format continue to be supported for the foreseeable future?".Rob Chandler, MVP in help systems, gave a very helpful answer, to the effect that there is not yet a replacement for the CHM format.

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• Video: Coherence Community on Java.net - 4 Projects available under CDDL-1.0

  - by OTN ArchBeat

  If you work with Oracle Coherence and you're not familiar with the Coherence Community on Java.net you're missing out. The Coherence Community was launched on Java.net in June 2013, operating under the Open Source Initiative's Common Development and Distribution License (CDDL-1.0). Four projects are currently available for your participation: Coherence Hibernate Integration Coherence Spring Integration Oracle Tools The Coherence Incubator You'll learn a lot more about the Coherence Community in the video above, which features my conversation with Oracle Coherence Senior Principal Solutions Architect Brian Oliver and Oracle Coherence Consulting Solutions Architect Randy Stafford, two of the people behind the creation and management of the Community and it's projects.

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