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• Printing with Lacie Lightscribe requires root privileges

  - by James

  I have installed Lacie Lightscribe software on Ubuntu 12.04. Everything seems to be fine, the drive is detected, the proper media is detected, but when I click print I get the message "Printing Requires Root Privileges". I am the main (administrator) account on this computer, part of the sudo group and I cannot seem to find an answer to this dilemna in plain english. I've seen some apparently relevant posts which say things like "check whether the files /usr/4L/4L-gui and /usr/4L/4L-cli have any setuid-bits set. If so, remove them" but I need more detailed step-by-step instructions than that, please. Is there anyone who knows how to solve this?

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• Kickstart: Serve dynamic kickstart images via a CGI or PHP script?

  - by Stefan Lasiewski

  I'd like to kickstart a couple dozen RHEL6/SL6 servers. However, some of these servers are different and I don't want to create a new ks.cfg file for each class of server. Are there any products which can generate a Kickstart file dynamically on the fly, from a template? For example, if I append a line like this to the KERNEL: APPEND ks=http://192.168.1.100/cgi-bin/ks.cgi Then the script ks.cgi can determine what host this is (Via the MAC address), and print out Kickstart options which are appropriate for that host. I could optionally override some options by passing parameters to the script, like this: APPEND ks=http://192.168.1.100/cgi-bin/ks.cgi?NODETYPE=production&IP=192.168.2.80 After we kickstart the server, we activate Cfengine/Puppet on this system and manage the system using our favorite Configuration Management product. We're experimenting with xCAT but it is proving too cumbersome. I've looked into Cobbler, but I'm not sure it does this. Update: A roll-your-own solution is discussed in the O'Reilly book: Managing RPM-Based Systems with Kickstart and Yum, Chapter 3. Customizing Your Kickstart Install Dynamic ks.cfg, which echos some of the comments in this thread: To implement such a tool is beyond the scope of this Short Cut, but I can walk through the high-level design. Any such solution would mix a data store (the things that change) with a templating solution (the things that don’t change). The data store would hold the per-machine data, such as the IP address and hostname. You would also need a unique identifier, perhaps the hostname, such that you could pick up a given machine’s data. The data store could be a flat file, XML data, or a relational database such as PostgreSQL or MySQL. In turn, to invoke the system, you pass a machine’s unique identifier as a URL parameter. For example: boot: linux ks=http://your.kickstart.server/gen_config?host-server25 In this example, the CGI (or servlet, or whatever) generates a ks.cfg for the machine server25. But where, oh where, is the code for ks.cgi?

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• Building a chat-like functionality in iOS

  - by Mani BAtra

  I was planning to implement a functionality wherein a user can send data to a friend of his, similar to sending messages in WhatsApp. This is how I broke down the problem : The user registers for the app. This equates to user info being stored on a dedicated server. With the phone number as the key identifier. The user selects the friend to send a message to and pushes the data. The receiver polls the server regularly and acknowledges that the data has been received. I did a little bit of research and am thinking of implementing this using the XMPP Framework for iOS. Any pointers as to is this the correct implementation or some advice in general?

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• Trying not to get ahead of myself but it is hard!

  - by Andrew

  Well I made a 5 year plan for myself (11years-16years) I am pretty good at Java, HTML, and PHP. I have already done some end projects: Small Java Platform Game A Small Polynomial Solver A Small Image Sharing Site A Chess Website: chesslounge.net I am currently doing some Android Development and so far I have made a program that Vibrates, Blinks the Light, or Creates a custom status message based on the user input. And a program that rotates a pyramid with a texture. My question is: Should I stick to what I am doing or Learn something a little new? I am itching to do C++, but what is your advice?

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• undefined control sequence in a NOWEB document

  - by Jean Baldraque

  I'm writing a TeX-noweb document. I compile it with noweave -tex -filter "elide comment:*" texcode.nw > documentation.tex but when I try to compile the resulting file with xetex -halt-on-error documentation.tex I obtain the following error message ! Undefined control sequence. <argument> ...on}\endmoddef \nwstartdeflinemarkup \nwenddeflinemarkup It seems that \nwenddeflinemarkup is not recognized. If i delete from the document all the sequences \nwstartdeflinemarkup\nwenddeflinemarkup the document compile without exceptions. What can be the problem?

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• ubuntu 12.04 refuses to install with windows 7

  - by Amitabh Pandey

  I have a desktop computer with windows 7 installed on it . Recently I downloaded ubuntu 12.04 and burned the iso image on a new blank DVD . After successfully burning DVD , I booted from the DVD. Ubutu interface appeared asking me to either choose try ubuntu or install ubuntu . I chose to install ubuntu. Again on next screen I choose to install ubuntu inside windows 7. After pressing continue button the following message appeared : " checking battery state .............. ok checking for running unattended upgrades : acpid : exiting speech dispatcher disabled ; edit /etc/default/ speech -dispatcher Asking all remaining processes to terminate ............. ok Please remove installation media and close the tray (if any) then press enter : " Now the problem is that when I remove the installation media ( ie the DVD ) and press enter then instead of installing ubuntu the computer reboots into windows 7 !!! I am a newbie to ubuntu and therefore do not know much about it . What should I do?

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• How to Take Control and Customize Google Calendar Reminders

  - by Justin Garrison

  Google calendar has great flexibility with reminders, but the defaults are often useless without tweaking the settings. Here are some common notification settings you may want to change to suit your needs better Latest Features How-To Geek ETC How To Create Your Own Custom ASCII Art from Any Image How To Process Camera Raw Without Paying for Adobe Photoshop How Do You Block Annoying Text Message (SMS) Spam? How to Use and Master the Notoriously Difficult Pen Tool in Photoshop HTG Explains: What Are the Differences Between All Those Audio Formats? How To Use Layer Masks and Vector Masks to Remove Complex Backgrounds in Photoshop Hack a Wireless Doorbell into a Snail Mail Indicator Enjoy Clutter-Free YouTube Video Viewing in Opera with CleanTube Bring Summer Back to Your Desktop with the LandscapeTheme for Chrome and Iron The Prospector – Home Dash Extension Creates a Whole New Browsing Experience in Firefox KinEmote Links Kinect to Windows Why Nobody Reads Web Site Privacy Policies [Infographic]

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• Is there a good example of the difference between practice and theory?

  - by a_person

  There has been a lot of posters advising that the best way to retain knowledge is to apply it practically. After ignoring said advice for several years in a futile attempt to accumulate enough theoretical knowledge to be prepared for every possible case scenario, the process which lead me to assembling a library that's easily worth ~6K, I finally get it. I would like to share my story in the hopes that others will avoid taking the same route that was taken by me. I've selected graphical format (photos with caption to be exact) as my media. Help me with your ideas, maybe a fragment of code, or other imagery that would convey a message of the inherent difference between practice and theory.

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• From Pocket to Instapaper

  - by Michael Freidgeim

  Some time ago I’ve described the issues that I’ve had since a new version of Read It Later, named Pocket, was introduced.I’ve waited with hope for a new upgrade, but I had a huge disappointment with the latest version 16 June 2012. It didn’t fixed any of the two major problems, that I  experienced since new Pocket was introduced-  1. iPad app still didn’t show many of the saved links. 2. ability to rename articles on iPad still wasn’t restored.I’ve posted the message into their forum. They did not show my comment on their forum( I would name it censorship, not moderation), but a few days ago I’ve received an email, recommending “try logging out of the app on your iPad, and back in again.” Their suggestion helped,  but I don’t understand, why it is not posted as a recommendation on their support site.So I decided to try InstAPaper on my iPad, Previously I’ve used it for Kindle. I never considered it before on iPad, because there were no free demo and I was very satisfied with RIL free and then RIL Pro. Currently InstAPaper cost $3, so the price is not an issue.I’ve checked that it has most of features that I am using(e.g. renaming, folders) and I am quite happy with it now. Actually I am using Pocket (or RIL free) for old bookmarks( I have 1000+ stored on my iPad) and for new bookmarks I am using InstAPaper.Having a solid experience with RIL/Pocket I’ve created a list of suggestions to Marco Arment to implement.1. Some pages stored in InstAPaper have removed essential sections of the text. E.g in many blogs comments are not stored in  InstAPaper. Some pages lost almost all of important links (e.g. http://www.lib.rus.ec/a/32416 -sorry, in Russian). RIL/Pocket has 2 modes to store offline- Web view and Article view. Web View includes all links/images of the original page, but it’s very reliable. Article view suppose to strip unrelated information, but often corrupts the content. I prefer to use offline Web view.InstAPaper should also support offline Web view, in case if stripped view removes important part of content.2.  Black full screen Saving on iPad Safari is very annoying. After user pressed a bookmark, the saving has some delay and then for a few seconds prevents from reading the text.Would be better to show as message on the top part(as in Pocket ). I am surprised, that  a full screen popup was  implemented recently as a desired feature. 3.There are no comments allowed on http://blog.instapaper.com/. I would prefer to post some of these notes as comments on http://blog.instapaper.com/ rather than write them in my blog and then send link to Marco.(I found recommendation how to add support of comments on tumblr at http://www.tumblr.com/help, but then realized that Marko was the lead developer ofTumblr.)4. Also there is no support forum. I understand that maintenance of the forum ican be a hassle, but stackexchange fSome time ago I’ve described the issues that I’ve had since a new version of Read It Later, named Pocket, was introduced.I’ve waited with hope for a new upgrade, but I had a huge disappointment with the latest version 16 June 2012. It didn’t fixed any of the two major problems, that I  experienced since new Pocket was introduced- orums can be referred on  http://www.instapaper.com/main/support page, i.e.http://webapps.stackexchange.com/search?q=Instapaper  or http://apple.stackexchange.com/search?q=Instapaper 5. Tags are more convenient than folders. i.e. an ability for the same article to have more than one tag. Also creating of new folders is not supported offline, which is an annoying limitation.6. I would like to have a narrow list - additionally to existing list modes have a subject only list or subject+site list to show more list items on a screen.7. Limit of 500 offline articles sounds quite big, but my RIL list exceeded 1000, so it could be a issue in the future.8. Search button on iPad version is visible, but doesn’t work- it forces to buy Premium subscription. I think, that it’s not correct. If the button in a paid version is visible and enabled, it should  provide  a working functionality, e.g. search in article names only. And leave full-text search for the premium support.9..Copy URL is an important operation and deserves to be in a first level of Action menu, rather than in Share sub-menu.I’ve also have comment re post http://www.marco.org/2011/04/28/removed-instapaper-free. Marco Arment  explained, why he doesn’t provide free version of Instapaper.  I believe that he is loosing essential part of his customers. When I decided which of iPad application to choose, I’ve selected RIL, because I was able to play with free version, and I liked it. I didn’t have a chance to compare RIL and InstAPaper on iPad, so I’ve bought  RIL pro. For a user there is no point to pay even $3 , if there are similar free product, that user can try and see, is it suitable for him/her.I’ve also played with Readability. It doesn’t have folders or tags(which is very important for me), but nicely supports full text search

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• Wubi "could not retrieve the required disk image"

  - by Marc

  I tried to download Ubuntu 12.04 through Windows Installer (Wubi), but I get this error message: An error occurred: Could not retrieve the required disk image For more information, please see the log file: c:\user(username)\adddata\local\temp\wubi-12.04-rev266.log I tried to locate the file, but I can't find it, it's probably hidden. I know there's already a similar question asked, but I don't understand proxy thing Downloading error "Could not retrieve the required disk image " I was wondering will I get this same problem if I download via USB stick or CD? I'm running Windows 7 on a laptop. I'm not tech-savvy, so I need clear answer please.

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• Thunderbird adds ***UNCHECKED*** to subjects of GPG messages

  - by Roman Geber

  Thunderbird seems to consider it a great idea to add the string UNCHECKED in front of the subject of GPG encrypted messages. Well, its not a good idea but rather annoying. At first I thought it would be a mailserver thing, so I checked. No trace of it, anywhere. Same goes for the raw message source. When I look at it the subject appears untouched, therefore I assume its a Thunderbird thing. Does anyone know an option to turn this ill behavior off? Thanks a lot in advance! cu Roman

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• Objected oriented approach to structure inside structure

  - by RishiD

  This is for C++ but should apply to any OO language. Trying to figure out the correct object oriented apporach to do the following (this is what I do in C). struct Container { enum type; union { TypeA a; TypeB b; }; } The type field determines if it TypeA or TypeB object. I am using this to handle responses coming back from a connection, they get parsed and get put into this structure and then based on the message type the appropriate fields get filled in. e.g. struct Container parseResponse(bufferIn, bufferLength); Is there an OO approach for doing this?

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• What ever happened to the Google AJAX Search API

  - by John

  I am looking to query the main Google search however all references including stackoveflow point to the Google AJAX Search API. The odd thing is that it does not seem to exist any more not even a note to say it is depreciated? The old links point to main Google code site. If I look at the list of API's on that site the API it replaced is there Web Search API (Deprecated) which links back to same page but not the Google AJAX Search API. Further Google searching is not being helpful either, many blog posts pointing to the same Google site (http://code.google.com/apis/ajaxsearch/) that has no content and redirects to the same place? Just to prove it did exist I have found it on the way back machine however the last snapshot did not show any special unusual message.

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• Games installed from repos won't start

  - by Shauna

  I'm running Natty (upgraded from Maverick) with Gnome 3 (from the Gnome 3 PPA, Unity removed), and have recently found that some of my games from the repos no longer work. When I go to start them, I get the message Failed to launch [app name]. Failed to execute child process [app name] (no such file or directory). I've so far found this on Gweled and PyScrabble. Other games (Mines, Sudoku, Mahjongg), as well as other applications have opened just fine. Gweled used to open fine until recently. Any ideas on how to fix this?

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• Do I need a wifi card to have internet access?

  - by Sarah

  I am attempting to set up a wireless network on 11.04, freshly download today. The router is on and working. However, I do not have a wifi "card" (which I am assuming is a little USB-type thing that allows internet access, but correct me if I am wrong) and every time I try to type in the MAC address and everything, nothing works. I also get the "firmware missing" error when I scroll over the signal strength, which I have tried looking up but have been unsuccessful with completely understanding it. I guess my main question is do I need another little device to be able to use wifi on my ubuntu? I do have an ethernet cable but another person is using it and I do not want to be tied down to that cable. the problem is that none of the wireless networks show up, however they show up when I go into Windows mode on my laptop. I get an error message at the top saying "firmware missing" which I have tried looking up but still have no straight answer for.

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• problem in installing wireshark on ubuntu 12.04

  - by iqbal

  i tried to install wireshark on ubuntu 12.04 but when i enter the cod the message is whone to me is iqbal@iqbal-HP-ProBook-4530s:~$ sudo apt-get install wireshark Reading package lists... Done Building dependency tree Reading state information... Done Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation: The following packages have unmet dependencies: wireshark : Depends: wireshark-common (= 1.11.4+svn20140420104827~d0489f2a-0ubuntu1~precise1~ppa0) but it is not going to be installed E: Unable to correct problems, you have held broken packages so how can i install wireshark on ubuntu 12.04 if any one can please tell me thanks

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• Problems with Silverlight 3 Bitmaps

  As many people move to Silverlight 4, some of us that still have old projects in Silverlight 3, I havent found any solution to the below problem just yet, just a workaround for now. Still when using Visual Studio 2008 and Silverlight I receive this error on BitmapImages, something that looks like got fixed in Visual Studio 2010 and Silverlight 4, I havent tried in VS2010 and Silverlight 3. Silverlight 3: BitmapImage.SetSource - Catastrophic failure Message="Catastrophic failure (Exception...Did 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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• "Security Warning" comes up when I run via another program

  - by Alexander Bird

  If I execute vmmap from the command line it works fine. However, if I call some other program and pass vmmap as a paramater for this other program to start the execution, then I get this "security error" popup -- which makes it hard to automate scripts. In other words, I want to wrap vmmap via another program. In my case, I want to wrap vmmap via another program because whenever vmmap runs, it will bring a window up momentarily and then disappear. So I try passing vmmap as an argument to another program which will start the program "headlessly". I tried this program and this program, and in both cases I get the same popup which defeats the purpose of automation. Why does this happen when the program isn't run directly? Does anyone know the internals of what this warning is? And, utlimately, is there a way to stop this from happening, but only for this instance? I don't want to disable this warning-system on my whole computer. EDIT: I am using Windows Server 2003, and I don't necessarily need solutions for other platforms, but I would like to know what they are if they are platform-dependent solutions.

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• How to install the translations for trac

  - by julien

  I have installed trac on my server running Ubuntu 12.04. The problem is that the users cannot change the language in their preferences. Instead, the following message is displayed: Translations are currently unavailable. Trac has been localized to more than a dozen of languages but in order to be able to use them, the Babel package needs to be present when installing Trac. See TracInstall for details. The installation has been done using the repositories of Ubuntu, but I could not find any package related to trac and babel, nor trac and anything related to internationalization. How can I install the translations for trac?

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• how can i safely remove an external hard drive?

  - by Edmond Condillac

  Two of the three icons of the drive's partitions show on the desktop. One has disappeared and the contents are not accessible. Right clicking on the desktop icon of the partition gives the option to eject. Then the error message shows that the drive is busy and cannot be shut down. The drive is continually pinning. Kindly advise if possible how to safely remove the drive. Can the lost icon of the third drive and the datd contained in it be found, please? Kind regards

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• Problems connecting to eduroam wifi - ubuntu touch

  - by Fiona Cox

  I am trying to connect to our university's eduroam wi-fi network with my Nexus 4 running Ubuntu touch (utopic latest build), but can't get past the first stage. I wonder if anyone can help please? I am following these instructions (which worked for my iPhone): http://www.st-andrews.ac.uk/itsupport/mobile/eduroam/ But when I go to the bandit.st-andrews.ac.uk/connect page then follow the link to 'eduroam setup' I get the error message: Authorization Required This server could not verify that you are authorised to access the document requested. Either you supplied the wrong credentials (e.g., bad password), or your browser doesn't understand how to supply the credentials required. Apache/2.2.16 (Debian) Server at bandit.st-andrews.ac.uk Port 443 (Clearly it's the latter option (browser) as I haven't been asked for my credentials yet.) Is there a way round this, or am I just not going to be able to connect until further down the Ubuntu touch development road... Thanks!

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• How to best convert a fully encrypted drive into a Virtual Machine?

  - by SiegeX

  I have a Windows XP laptop that uses GuardianEdge's Encryption Plus to fully encrypt the drive from bootup. What I would like to do is install a much larger (unencrypted) hard drive with Windows 7 on it and turn this fully encrypted drive into a Virtual Machine that can be ran in either Virtualbox or VMWare on the Windows 7 host. I've read many howto's that talk about using an imaging tool like Acronis True Image to image the drive then passing that through VMWare's VCenter Converter to turn it into a format that VMWare can understand. Unfortunately this seems to all far apart when you are dealing with a fully encrypted drive because Acronis cannot recognize the file system and attempts to do a sector-by-sector copy of the entire hard drive. This is extremely wasteful since the drive is 120GB but the file system is only using 10GB of that. Even if I were OK with going with an inefficient 120GB sector-by-sector copy, I'm not sure that this would even work under VMWare or Virtualbox. Unfortunately, the Guardian Edge boot-time login comes up only after the hard drive has been selected as the boot device; preventing me from being able to decrypt the drive prior to booting an Acronis True Image CD so that it can recognize the underlying file system. I'm sure I'm not the first person to want to do this but I am having a heck of a time finding solutions to this problem. All suggested/answers welcomed. Thanks

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• Wammu, Samsung J700 error GetNextMemory code: 56

  - by Tamas

  I have got a (old) Samsung J700i. When connecting with a USB cabel to Wammu first the access was denied. Now it is oké... However, when I try to get info out from the phone... I get error message: Error whlie communicating with phone Desciption: Internal phone error. Function: GetNextMemory Error code: 56 I am using Ubuntu 12.04 and Wammu 0.36 Running on Python 2.7.3 Using wxPython 2.8.12.1 Using python-gammu 1.31.0 and Gammu 1.31.0 How may I access data on the phone? Thanks, Tamas

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• Prevent shutdown when rsnapshot is running

  - by highsciguy

  Since shutdowns during rsnapshot operation will lead to inconsistent/partial backups, I wonder how to delay the system shutdown while rsnapshot is active. The task is complicated by the fact that I need a solution which is compatible with non-expert users. I.e. I need to tell reliably to the user that he needs to wait until the process is finished and not to do a hard reset. Once this is the case shutdown should continue. A possible solution could be to replace the action of the window managers (mostly KDE) shutdown/restart/hibernate buttons by a script which first checks if rsync is active and shows a message if this is the case. But I do not know if this is possible in KDE.

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• Ubuntu 13.04 on Lenovo G580 > built-in (web)cam not recognized

  - by user159295

  I've installed Ubuntu 13.04 on a Lenovo G580. Now I noticed that the built-in (web)cam is not being recognized. Does anybody know how to fix this and get the webcam running? Any help is appreciated! Thanks I've downloaded/installed the suggested program and the webcam is working within that program. However, when running Camera Test from the System Testing here's what happens: when clicking on "Test", there's NO image showing up a few seconds after clicking on "Test", an error message is popping up saying "Sorry, Ubuntu 13.04 has experienced an internal error" When going to Skype, video is enable and under "select webcam" there's "Lenovo EasyCamera (/dev/video0) as only option selected. But, Skype doesn't recognize the camera as there's no pictures. Any ideas on how to get this straightened out?

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