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• Ubuntu not starting up after shutdown while upgrading

  - by comatose

  I had ubuntu 11.10 installed and I was upgrading it to Ubuntu 12.04.1. While upgrading my computer got shut down due to heating issues. Afterwards its not starting up and gets stuck at a black screen. I can use ctrl+alt+f1 to go to command line. But I dont know how to resolve this issue from there. It shows me a message the ubuntu release 12.04.1 is available and run the command "do-release-upgrade" to upgrade to it. But when I run this command, it errors out saying "no new release found". Can anyone suggest what to do ? Thanks !

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• Startup applications 14.04

  - by gpalthrow

  I'm trying to mount 3 partitions by default when I log in. I used to do that with the start up applications in 12.04 However there seems to be a nasty bug in 14.04 where false command duplicates are removed (apparently, only the command is taken into account, even if the arguments differ). I tried using one single command instead of 3, putting all the devices in one line (something like /usr/bin/udisks --mount /dev/sdb1; /usr/bin/udisks --mount /dev/sdb2; /usr/bin/udisks --mount /dev/sdb3; ) However it does not seem to work either. What can I do to have 3 partitions mounted by default (with their label) ?!

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• KeyTouch remaps the delete key

  - by Robert Gowland

  I installed KeyTouch, but it decided that the delete key should be the KeyTouch hot key. So, when I pressed deleted, KeyTouch came up. Next I uninstalled KeyTouch and now the delete key doesn't do anything. Is there any way to remap the delete key to actually delete? Notes: I tried reinstalling KeyTouch, and the same thing happens. KeyTouch does not allow the user to map the delete key. EDIT xev shows keycode 119 when I press the delete key xmodmap shows keycode 119 mapped to Delete NoSymbol Delete running xmodmap -e "keycode 119 = Delete" from the command line does not resolve the issue

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• Dynamic quicklist: how to reference to .desktop file? (installed in /opt)

  - by Nick Lemaire

  I'm trying to create a dynamic quicklist for an application I'm developing in quickly. This is the line of code I use to try and connect to the .desktop file: self.launcher = Unity.LauncherEntry.get_for_desktop_id("my-app.desktop") For testing purposes, I've found that when using quickly run I should copy the .desktop file to ~/.local/share/applications. When I do this, the quicklist shows up correctly. However, when packaging my app using quickly package --extras, and installing this package, I get a launcher without quicklist. Does this have something to do with my app being installed in /opt? Meaning my desktop file is located somewhere else? Should I use another reference to the desktop file?

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• Q2 2010 ASP.NET AJAX and MVC roadmaps published

  For those of you who are interested in what is cooking for the next major release of RadControls for ASP.NET AJAX and Telerik Extensions for ASP.NET MVC - here are the roadmaps for both product lines, the ink has not event dried yet :) ASP.NET AJAX suite highlights One new control - TagCloud Major new features for RadScheduler, RadEditor, RadAsyncUpload, RadGrid, RadListView and RadRotator Many enhancements across the entire product line ASP.NET MVC suite highlights 3 new extensions - combobox, editor and window Major new features for RadGrid (hierarchy, edit forms editing, column resizing) To go into further details visit the links below: RadControls for ASP.NET AJAX Q2 2010 roadmap Telerik Extensions for ASP.NET MVC Q2 2010 roadmapDid you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• Pooling (Singleton) Objects Against Connection Pools

  - by kolossus

  Given the following scenario A canned enterprise application that maintains its own connection pool A homegrown client application to the enterprise app. This app is built using Spring framework, with the DAO pattern While I may have a simplistic view of this, I think the following line of thinking is sound: Having a fixed pool of DAO objects, holding on to connection objects from the pool. Clearly, the pool should be capable of scaling up (or down depending on need) and the connection objects must outnumber the DAOs by a healthy margin. Good Instantiating brand new DAOs for every request to access the enterprise app; each DAO will attempt to grab a connection from the pool and release it when it's done. Bad Since these are service objects, there will be no (mutable) state held by the objects (reduced risk of concurrency issues) I also think that with #1, there should be little to no resource contention, while in #2, there'll almost always be a DAO waiting to be serviced. Is my thinking correct and what could go wrong?

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• Reader Poll: Are You Switching to Internet Explorer 9?

  - by Jason Fitzpatrick

  The recent release of Internet Explorer 9 polished up the IE line with a new interface, hardware acceleration, and more. Is enough to convince you to switch? Yesterday we gave you a full run down of the Internet Explorer 9 release and highlighted the major improvements including: a totally new interface that’s even more streamlined than that of Google Chrome, direct access to your video card for super fast acceleration, customizable menus for pinned sites, HTML 5 support, and a combined address and search bar, among other improvements. Is it enough to sway you? Cast your vote in the poll below and then sound off in the comments. How-To Geek Polls require Javascript. Please Click Here to View the Poll. How to Create an Easy Pixel Art Avatar in Photoshop or GIMPInternet Explorer 9 Released: Here’s What You Need To KnowHTG Explains: How Does Email Work?

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• I`ve got some problems with new Acer Aspire S3

  - by xcariba

  I just got a new Acer Aspire S3 Laptop, and I've installed Ubuntu on it. Here is some problems: 1. Bluetooth (AR3012) can't find any devices. rfkill shows that everything is fine, but I still can't connect to any device. (Maybe it was turned off in stock windows?) 2. Can't change screen brightness (I've tried Timex's solution with new 3.2-rc kernel and some grub options, touchpad works fine,but I still can`t use Fn+Right/Left) 3. 720p video in all players(VLC, mplayer and totem) works wrong. I found some similar problems on intel video chips with vblank sync or something like that. Video plays as it should, but i always see a line which appears on action scenes (looks like some parts of a screen updates faster) Maybe there are some solutions from similar laptops that I can find? PS I've tried ubuntu 11.04 with old kernel and linux mint 12-rc with 3.2-rc2 kernel.

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• How do I change local display resolution via SSH?

  - by krumble1

  I have a machine running Ubuntu Server 12.04 LTS and I'm having problems with the local monitor. The Dell flat panel I'm using only displays this message while the computer running: "Cannot Display This Video Mode" and then the information: "Optimum resolution 1280x1024 60Hz". I'm fairly new to using an operating system wholly via command line but I'm learning fast. :) I can access the server fine via SSH so using it is not a problem. However, for where it is positioned at the moment, it would be much more convenient to use the computer locally. I'm just wondering how to change the local screen resolution via SSH to something usable by my monitor. Thanks for your time! BTW: I have also tried switching displays and I still have the same problem. Also BTW: I tried putting in the xrandr command and all I get back is: Can't open display

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• Has the Appindicator or GtkMenu API changed in Saucy?

  - by marxjohnson

  I've written a custom application indicator, which isn't working properly on saucy. The menu is initialised with a few items, then updates regularly, adding or removing menu items. This worked fine <13.10, but on 13.10, the line that adds the menu to the indicator produces the following warning: Warning: /build/buildd/glib2.0-2.38.0/./gobject/gsignal.c:2475: signal 'child-added' is invalid for instance '0x24390e0' of type 'GtkMenu' self.ind.set_menu(self.menu) And the items added to the menu subsequently dont appear. A bug has been filed against several indicators for the same problem, but it's not clear to me whether this is a problem with the indicators as a result of an API change, or a bug in the GTK or Appindicator libraries. Does anyone know?

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• What command are my volume keys running?

  - by user2787904

  In Unity I use my ThinkPad hot keys to change the volume. I need to know the command that these keys run so that I can bind it in my window manager. I have tried using amixer but could not change the volume through command line amixer set Master 10%- amixer: Unable to find simple control 'Master',0 amixer scontrols: Simple mixer control 'IEC958',0 amixer set 'IEC958' 50%- amixer: Invalid command! So obviously this is not what Unity is running. I have tried changing the default sound card as well but that didn't help.

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• Need to run `nvidia-xconfig` before booting

  - by RobinJ

  I formatted my whole hard drive, and installed Elementary OS (Ubuntu 10.10) on it in an attempt to get rid of all the problems. It failed. Every since I installed the nvidia-current drivers I first need to boot into recovery mode, and run sudo nvidia-xconfig before booting the system in the normal way. If I don't do this, it will just stop at a black screen after the boot screen, responding to nothing but CTRL+ALT+DELETE and the power button. When I boot the system after running the nvidia-xconfig command I can just start working as usual. Update I suspect it's got something to do with Plymouth. I shall have to try it again before I can confirm it, but removing the quiet and splash parameters from the kernel line in /boot/grub/grub.cfg seems to help. But still, I like my Plymouth screen. A black screen with text rolling over it (or without the text) doesn't attract me much.

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• are there compiler options in clang? [on hold]

  - by Deohboeh

  I am learning from The C++ Primer. One of the exercises is to compile a program with arguments in main(). For this I am trying to use mac terminal. I need to compile a C++11 Unix executable file named "main" which takes “f" as an argument. I am using Xcode 4.6.3 on OS X Lion. I compiled the program with clang++ -std=c++11 -stdlib=libc++ main.cpp -o main. But don’t know what to do next. I found -frecord-gcc-switches while searching compiler options on google. It does what I need to do. Is there a clang version of this? Please use simple language. I have never used command line before. I tried going through the clang user guide but a lot of it is out of my depth.

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• After power manager reinstall

  - by tuxi

  I had checking battery state hanging I solved it with the help of an answer from this site: sudo apt-get --reinstall install gnome-power-manager But now my left windows bar is rigid, it does not disappear on wide screen. EDIT Also in most of applications, characters are white. What could be the problem? and what should I do? 2ND EDIT My ubuntu is 12.04 LTS. I was trying to install some packages for dependencies of allegro game development library, one of the packages was libwxgtk2.8-0, after that a red cross appeared near user name and clock. Then computer became frozen and i had to remove my battery. I know it is a very bad thing. Then when i try to restart my computer, it could not start, it was waiting on black screen with line: Checking battery state... Then i run the above command. Computer could start but characters are white.

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• Is it ethical for a programmer to promote his/her own library?

  - by Kit Menke

  Fairly recently I started maintaining my own open source JavaScript library. I created it to solve a pretty specific need but fairly regularly see questions that can be solved (in whole/part) by using my library. I've always gone ahead to post my answer including my library and make sure to always include a disclosure specifying that I maintain it. I feel for open source projects this may not be such a big deal but where do you draw the line? (ex: commercial products) Is it ethical for a programmer to promote is own library? When is it not?

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• How to build completely modular web applications

  - by Webnet

  In the coming months we're going to begin a project where we take a system we've built for a client (v1) and rebuild it from scratch. Our goal with v2 is to make it modular, so that this specific client will have their own set of modules they use, then another client may use a different set of modules altogether. The trick here is that Company A might have a series of checkout and user modules that change how that system works. Company B might stick with the standard checkout procedure but customize how products are browsed. What are some good approaches to application architecture when you're building an application from scratch that you want to have a Core that's shared among all clients while still maintaining the flexability for anything to be modified specifically for a client? I've seen CodeIgniter's hooks and don't think that's a good solution as we could end up with 250 hooks and it's still not flexible enough. What are some other solutions? Ideally we won't need to draw a line in the sand.

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• Issues with external mounting after pysdm removed

  - by K. R. Huard

  So, I'm very new to ubuntu. I was having troubles getting my external hard drive to be read/write permission. It's owner is my macbook, and writing on the drive was repeatedly denied. In trying to sort this out, I tried the Nautilus commands (no success), installed the PYSDM application, changed some things (as suggested by this user in this forum http://askubuntu.com/a/113992 )but then found that I was getting an error message whenever I tried to mount an external storage device. The error is: Unable to mount DERPSTICK error mounting: mount exited with exit code 1: helper failed with: [mntent]: line 14 in etc/fstab is bad mount: only root can mount /dev/sdc1/ on /media/sdc1 Others with similar problems put their fstab up here, but I'm not sure how to bring it up, or if I should even try. Thanks for your time!

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• All traffic is passed through OpenVPN although not requested

  - by BFH

  I have a bash script on a Ubuntu box which searches for the fastest openvpn server, connects, and binds one program to the tun0 interface. Unfortunately, all traffic is being passed through the VPN. Does anybody know what's going on? The relevant line follows: openvpn --daemon --config $cfile --auth-user-pass ipvanish.pass --status openvpn-status.log There don't seem to be any entries in iptables when I enter sudo iptables --list. The config files look like this: client dev tun proto tcp remote nyc-a04.ipvanish.com 443 resolv-retry infinite nobind persist-key persist-tun persist-remote-ip ca ca.ipvanish.com.crt tls-remote nyc-a04.ipvanish.com auth-user-pass comp-lzo verb 3 auth SHA256 cipher AES-256-CBC keysize 256 tls-cipher DHE-RSA-AES256-SHA:DHE-DSS-AES256-SHA:AES256-SHA

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• DNSCrypt-Proxy specific usage

  - by trekkiejonny

  I have some specific usage questions about DNSCrypt-Proxy. I followed a guide and ended with the command dnscrypt-proxy --daemonize –user=dnscrypt Without any further switches does it default to using OpenDNS's resolver server? I want to use specific servers, I found reference to pointing it to the full path of a CSV file. What is the CSV format for use with DNSCrypt? Would it be "address:port,public key"? Does it go in order of working addresses? For example, first resolver doesn't connect it moves on to the second line of the CSV, then third etc. Lastly, would this question be more appropriate in another StackExchange section?

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• Learn Advanced ADF Online, For Free

  - by Grant Ronald

  The second part of the advanced ADF on line ecourse is now live.  This covers the advanced topics of region and region interaction as well as getting down and dirty with some of the layout features of ADF Faces, skinning and DVT components.  The aim of this course is to give you a self-paced learning aid which covers the more advanced topics of ADF development.  The content is developed by Product Management and our Curriculum development teams and is based on advanced training material we've been running internally for about 18 months. We'll get started on the next chapter, but in the meantime, enjoy chapters one and two.

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• Master Typing Productivity when Programming/SysAdmin [closed]

  - by Hartator

  I try to learn how to type fast and have managed to learn a lot. I am quite good at typing english text now. I do a lot of programmation though and if QWERTY seems fitted for english text, it doesn't seem fitted to type Ruby, Python, Javascript, Command Line or C++... I have read plenty of articles and if I respect their guidelines/tips, I am using a lot my right pinky specially to type []{}|\;:'"/?=+ enter delete. As you can see this symbols are the ones which are the most used when you are programming and we are using only one weak finger to reach them. Am I learning wrong? Is there is a way to be more productive? (I don't really want to switch to DVORAK) Have you some experiences/tips to share regarding this issue? Original Post : http://stackoverflow.com/questions/12230373/programmer-typing-productivty

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• Starcraft 2 not displaying map in game

  - by AntiFX

  I installed Starcraft II wings of liberty via playonlinux, it installed fine, it starts up fine, but when I go into a game the map does not show, it is just black, but all my buildings/units/mineral line shows up, but everything else is black, also all the abilities do not have any graphics, and I can not see my player portrait in the menus. I am on a 32 bit version of ubuntu 12.04 with wine 1.5.10 I think it is probably a missing package I need to install...but I have no clue which one it would be, or if it is even that. Can anyone help? Thank you in advance!

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• Is it bad SEO to embed an img tag in the middle of a sentence?

  - by Offlein

  I recently received a web mockup that included a sidebar with a short paragraph of narrow text; a quote from a person. At the end of the quote, the mockup had a circular portrait of the person floated to the right, hanging off the edge of the block, with the text flowing around the edge of it. It looked like this, where "TEXT" is the text, and "o" is the portrait TEXTTEXTTEXTTEXTTEX TEXTTEXTTEXTTE TEXTTEXTTEXT ooooo TEXTTEXTTEXT ooooooo TEXTTEXTTEXT ooooooo ooooo The easiest way to do this would be to put the tag for the portrait somewhere in the markup of the text, and float it right. But the HTML will look like, in that case: TEXTTEXTTE<img src="..." style="float: right;">XTTEXTTEXT and I fear this would be bad for SEO. Does anyone know? The other option is putting the at the end, absolutely positioning it, and using manual line breaks -- which sucks for my responsive design.

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• How to Call a extension method from library in asp.net mvc project inside the razor view ?

  - by Anirudha

  Originally posted on: http://geekswithblogs.net/anirugu/archive/2014/06/12/how-to-call-a-extension-method-from-library-in-asp.net.aspxIf you want to call a extension method from a c# library when you are working on views then here in this post I am showing you how you can do it.   just go to views and open the web.config file. (do all these step in VWD or VS 13 whatever you use for work) inside the tag of  system.web.webPages.razor you will find the tag  namespaces which contain too many namespace which shown in intellisense when you work in Views inside your Visual studio.   now  add line like this   <add namespace="MyCustomDll" /> MyCustomDll is a namespace that came from library that I want to use in my views. Now whenever  I am working in views I can see the extension method in views.   Cheers

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• How do I figure out the minimum number of swaps to sort a list in-place?

  - by sova

  In-place sorting is essentially swapping elements without using extra storage, correct? How can I find the minimum number of swaps required for a list? A C D Q R Z E // input | | | > > > <<< // movement A C D E Q R Z // output Swapping: A C D Q R Z E swap Q with E, ACDERZQ swap R with Q, ACDEQZR swap R with Z, ACDEQRZ. done. 3 swaps. Shifting items left or right is essentially swapping, but I want the optimal number for plucking an item out of line and switching its place with another.

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