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• Display problem with fresh install of 12.04

  - by Dan

  Just intalled Ubuntu 12.04 from CD and install went with no problems. After rebooting, I get the initial purple screen and then a black screen with mouse pointer and a few stray pixels at the bottom left of screen. Occasionally during the boot process, the purple screen comes back momentarily but then back to the black screen with the mouse pointer. When I finally give up and press the power button, the purple screen returns with the Shut Down box visible as it is shutting down. Any ideas? I have tried adding nomodeset after quiet splash, but no change. Possibly not doing it correctly, since I am somewhat of a newbie to linux. Thanks! Dan

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• Annoying mistake when create web template in SharePoint 2010

  - by ybbest

  I get the error    Error occurred in deployment step ‘Add Solution’: Exception from HRESULT: 0x8107026E when deploying my web template project. It turns out that your name for the Web template name has to match the name of you WebTemplate section in the element.xml file. Please see the screenshot below, the highlighted two needs to be the same. It took me so long to figure out and I will keep here in case everybody else struggle. If you are a newbie with web template in SharePoint 2010, this blog post explains the details.

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• Apache Prefork Configuration

  - by user1618606

  I'm newbie on VPS configuration. So, I've installed apache, php and mysql and now I need to know how to configure Prefork to optimize Apache. The system configuration is: CPU Cores 2 x 2 Ghz @ 4 Ghz RAM Memory 2304 MB DDR3 Burst Memory 3 GB DDR3 Disk Space 30 GB SSD Bandwidth 3 TB SwitchPort 1 Gbps Actually, after linux, mysql, apache and php, there are 250 MB memory in use. Well, I don't have idea to calculate. I saw in some websistes, some vars like: KeepAlive On KeepAliveTimeout 1 MaxKeepAliveRequests 100 StartServers 15 MinSpareServers 15 MaxSpareServers 15 MaxClients 20 MaxRequestsPerChild 0 or StartServers 2 MaxClients 150 MinSpareThreads 25 MaxSpareThreads 75 ThreadsPerChild 25 MaxRequestsPerChild 0 How I could to do: Prefork or worker? Where and how the vars are placed? In httpd.conf?

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• Second display running off laptop VGA not correctly positioned (offset left and up)

  - by Filthy Pazuzu

  I have black bars on the right and bottom of my display! I'm running my laptop's VGA output to an recognized as a It is 20", but the assumed 3" difference does not account for the incorrect position. Everything displays fine. It runs high-res video beautifully. But it's 3/4" offset left and an unreasonably annoying 1/4" offset up. I've tried going through the display's annoying & useless menu, but it doesn't have any way to adjust the position. I'm certainly no linux newbie, but on this Ubuntu (Pangolin, BTW) I can't figure out how to make simple positional display changes on Ubuntu. It's not only frustrating, it's a bit humiliating! So. Does anyone know of an app that will allow me to make basic display position alterations? ("App" - annoyingly trendy, but a useful word - no matter how grating.) Thanks, & Cheers, Paz

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• Compiler Dependencies [closed]

  - by asghar ashgari

  I'm a newbie researcher who's passion is programming languages (Web era). I'm wondering why all the Web frameworks and Web-based general purposes languages, have a huge number of dependencies when you want to install and then use (e.g., extend, alternate, etc.) their compilers. For example, Ruby on Rails or Scala. If I want to download their source code, and try to build it again, to me at least, feels like a can of worms. I have a MAC, so I need to install MACports, then update my XCode, then get the compiler source code that has bunch of other dependencies, then its hard to set things up; just to see the installed open-source compiler works fine.

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• Is LISP still useful in, and which version is most used in todays world ?

  - by shan23

  I try to teach myself a new programming language in regular intervals of time. Recently, I've read how Lisp and its dialects are at the complete opposite end of the spectrum from languages like C/C++, which made me curious enough to know more about it. However, two things are unclear to me, and I'm looking for guidance on them : Is LISP still practiced/used in todays world, or is it a legacy language like FORTRAN/COBOL ? I mean, apart from maintaining existing code, is it used on new projects at all ? What is the most widely used dialect ? I came across Scheme and Common Lisp as the 2 most prevalent dialects, and wanted your opinion as to which is the most favored/useful one to learn - and would be immensely gratified if you can suggest any resources for a rank beginner to start from. While eager to learn a language which is fundamentally different from the procedural languages I'm used to, I don't want to invest undue effort in something if its totally obsolete - I'd still learn it if it was professionally "dead", but only with an academic perspective...

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• Tiled game: how to correct load background image ?

  - by stighy

  Hi, i'm a newbie. I'm trying to develop a 2d game (top-down view). I would like to load a standard background, a textured ground... My "world" is big, for example 3000px X 3000px. I think it is not a good idea to load a 3000px x 3000px image and move it... So, how is the best practice ? To load a single small image (64x64) and repeat it for N times ? If yes, ok, but how i can manage the "background" movement ? Thanks Bye!

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• MySQL fails to start after upgrade to 12.04?

  - by radek

  I'm a newbie on MySQL ground so bear with me. I've just finished upgrading 11.10 to 12.04. Everything seemed to work without any hiccups and all my software and settings are working fine. Apart from MySQL. When I try: sudo start mysql I receive an error: start: Job failed to start Where can I possibly diagnose what the problem is? And (hopefully) - how to sort it out? (I disabled automatic start following advice here if that is of some importance) Update 1: Both outputs of: cat /var/log/mysql.err cat /var/log/mysql.log are empty. Output of dmesg | grep mysql: [ 1401.785141] type=1400 audit(1335619832.181:25): apparmor="STATUS" operation="profile_replace" name="/usr/sbin/mysqld" pid=16165 comm="apparmor_parser" [ 1401.791089] init: Failed to spawn mysql main process: unable to execute: No such file or directory Update 2: As indicated by AWinter below - it seemed that MySQL disappeared automagically after upgrade and had to be reinstalled.

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• Why is there still so much offer for Perl programmers?

  - by user491444

  A quick search on monster.com on different scripting languages resulted on Perl having much more job opportunities than Python and Ruby (in Europe, I didn't check for the rest of the world), and since I'm just a newbie programmer I was wondering why is this? I've read everywhere that Python and Ruby are much better languages, and much more organized. Having coded in python and php myself, Perl's code seems so alien to me. Anyways, sorry for my poor English, it's my second language, and this is not a critique on the Perl language, I was just wondering whether it's a good idea to learn it at this point or not.

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• PHP CodeSniffer: indentation of 2 is ignored, it just checks 4

  - by Olivier Pons

  # phpcs --version PHP_CodeSniffer version 1.3.3 (stable) by Squiz Pty Ltd. (http://www.squiz.net) # Trying to do this: phpcs --tab-width=2 includes/json/item/categorie.php FOUND 29 ERROR(S) AND 3 WARNING(S) AFFECTING 24 LINE(S) Doesn't work. This doesn't work too: phpcs includes/json/item/categorie.php --tab-width=2 FOUND 29 ERROR(S) AND 3 WARNING(S) AFFECTING 24 LINE(S) If I indent the file with 4 spaces (which I don't want): phpcs --tab-width=2 includes/json/item/categorie.php FOUND 4 ERROR(S) AND 3 WARNING(S) AFFECTING 17 LINE(S) phpcs --tab-width=4 includes/json/item/categorie.php FOUND 4 ERROR(S) AND 3 WARNING(S) AFFECTING 17 LINE(S) phpcs --tab-width=50 includes/json/item/categorie.php FOUND 4 ERROR(S) AND 3 WARNING(S) AFFECTING 17 LINE(S) phpcs includes/json/item/categorie.php --tab-width=50 FOUND 4 ERROR(S) AND 3 WARNING(S) AFFECTING 17 LINE(S) So it's totally ignored. It this a bug?

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• j2ee implementing security and using a framwork pros and cons

  - by Ismail Marmoush

  I'm a newbie to j2ee security, and i'm not j2ee expert either, though i'm really willing to put some effort and learn I've an application that i'm about to develop on Google App Engine (GAE) --with no time constraints. As you know GAE handles a lot of web container security issues for you, also I will be using openID for authentication exclusively (sessions will be handled by provider). GAE supports SSL which will help with confidentiality and integrity maybe. Authorization can be done through filters. I know reinventing the wheel is a mess, but I was looking forward to learn something about security and implement that in my new app. so what the pros and cons of using a framework like shiro, spring security, jguard etc or filling the rest of gaps on my own ?

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• Setting up SANED with sane-test

  - by Enoon

  I'm trying to setup a network service for running saned (running the sane-test backend) on Ubuntu 12.10, running it on a virtualbox. I followed the directions found here: https://help.ubuntu.com/community/ScanningHowTo and i got to the point where if i use a front-end like xsane, or use the command scanimage -d test i get the desired behaviour. (i get the test image). But when i try to use the network demon to access the backend (from the localhost) i get Failed to connect. I used telnet on 127.0.0.1 6566 and i got the following error: saned: symbol lookup error: saned: undefined symbol: sanei_w_init I'm a linux newbie, so i could be making some stupid mistake. Any ideas on how to fix this? Thanks [update]After posting this question i logged out, logged back in and it worked. After a few days i tried again and it gave the same error as before. Any help?

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• Tip #13 java.io.File Surprises

  - by ByronNevins

  There is an assumption that I've seen in code many times that is totally wrong.  And this assumption can easily bite you.  The assumption is: File.getAbsolutePath and getAbsoluteFile return paths that are not relative.  Not true!  Sort of.  At least not in the way many people would assume.  All they do is make sure that the beginning of the path is absolute.  The rest of the path can be loaded with relative path elements.  What do you think the following code will print? public class Main {    public static void main(String[] args) {        try {            File f = new File("/temp/../temp/../temp/../");            File abs  = f.getAbsoluteFile();            File parent = abs.getParentFile();            System.out.println("Exists: " + f.exists());            System.out.println("Absolute Path: " + abs);            System.out.println("FileName: " + abs.getName());            System.out.printf("The Parent Directory of %s is %s\n", abs, parent);            System.out.printf("The CANONICAL Parent Directory of CANONICAL %s is %s\n",                        abs, abs.getCanonicalFile().getParent());            System.out.printf("The CANONICAL Parent Directory of ABSOLUTE %s is %s\n",                        abs, parent.getCanonicalFile());            System.out.println("Canonical Path: " + f.getCanonicalPath());        }        catch (IOException ex) {            System.out.println("Got an exception: " + ex);        }    }} Output: Exists: trueAbsolute Path: D:\temp\..\temp\..\temp\..FileName: ..The Parent Directory of D:\temp\..\temp\..\temp\.. is D:\temp\..\temp\..\tempThe CANONICAL Parent Directory of CANONICAL D:\temp\..\temp\..\temp\.. is nullThe CANONICAL Parent Directory of ABSOLUTE D:\temp\..\temp\..\temp\.. is D:\tempCanonical Path: D:\ Notice how it says that the parent of d:\ is d:\temp !!!The file, f, is really the root directory.  The parent is supposed to be null. I learned about this the hard way! getParentXXX simply hacks off the final item in the path. You can get totally unexpected results like the above. Easily. I filed a bug on this behavior a few years ago[1].   Recommendations: (1) Use getCanonical instead of getAbsolute.  There is a 1:1 mapping of files and canonical filenames.  I.e each file has one and only one canonical filename and it will definitely not have relative path elements in it.  There are an infinite number of absolute paths for each file. (2) To get the parent file for File f do the following instead of getParentFile: File parent = new File(f, ".."); [1] http://bt2ws.central.sun.com/CrPrint?id=6687287

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• How to find data usage of a user on my website?

  - by Dharmik

  I have a website (project) where users get logged in, do their work and then they log out. I need to build a report that displays how much each person has used of data. (bandwidth, how much was downloaded in Kb, etc) So the process may be like counting start of usage from user login to user logout. I have seen a little about Webalizer and AWStats for something like this, But I am not sure how they work. I have tried Content-Length but some pages don't send content-length.I have also seen mod_bandwidth but still I am little confused. This process is needed for my site because now, our company is thinking of charging per usage and also bandwidth allocation for each users (according to their membership). I haven't worked with this type of tools, I am newbie in this matter. I have done only simple websites not any setting like this in Apache or Linux. My project is in Codeigniter.

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• How to make a disk image and restore from it later?

  - by Torben Gundtofte-Bruun

  I'm a new Linux user. I've reinstalled my Wubi from scratch at least ten times the last few weeks because while getting the system up and running (drivers, resolution, etc.) I've broken something (X, grub, unknowns) and I can't get it back to work. Especially for a newbie like me, it's easier (and much faster) to just reinstall the whole shebang than try to troubleshoot several layers of failed "fixing" attempts. Coming from Windows, I expect that there is some "disk image" utility that I can run to make a snapshot of my Linux install (and of the boot partition!!) before I meddle with stuff. Then, after I've foobar'ed my machine, I would somehow restore my machine back to that working snapshot. What's the Linux equivalent of Windows disk imagers like Acronis True Image or Norton Ghost? Note: I found a similar question here.

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• First Partial Lunar Eclipse in 2010

  - by Suganya

  Following the Annular Solar Eclipse in January 2010, the next eclipse hitting the earth is partial Lunar Eclipse in June 2010. This partial Lunar eclipse is mostly visible to people in America and Pacific side.   The first Lunar Eclipse for the year 2010 occurs on 26th June with the magnitude of 0.5368 and the eclipse lasts for two and a half hours totally. This eclipse is clearly visible for those who are in Western Canada , USA and Eastern Australia. The local timings (24 Hours format) of the cities where the partial solar eclipse is visible are S.No Place Partial Eclipse Begins Partial Eclipse Ends 1 Atlanta 05:17 08:00 2 San Francisco 02:17 05:00 3 Texas 04:17 07:00 4 Los Angeles 02:17 05:00 5 Sydney 20:17 23:00 6 Osaka 19:17 22:00 Join us on Facebook to read all our stories right inside your Facebook news feed.

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• SEO optimization for AJAX site and dynamic HTML canvas

  - by Christian Benincasa

  I have a site that uses AJAX to query the Last.fm database and then dynamically draws a graph of the results on an HTML canvas. In the search function, I have a command that sets window.location.hash to the search parameters. I also have a function that checks if a hash was provided in the url and if so, generates the page. For example, http://www.thenlistento.com/#!/led+zeppelin will automatically navigate to a search page for Led Zeppelin. My question is, how do optimize this set up for SEO? Can it be done at all? I've taken a look at Google Webmaster Docs and read over the hashbang protocol, but I'm not totally sure how to apply it to my situation..or even if I can at all. Any help/suggestions would be greatly appreciated. Link to the site: http://www.thenlistento.com

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• Permission denied after creating home partition

  - by Magnus

  I have recently created a separate home partition following this tutorial https://help.ubuntu.com/community/Partitioning/Home/Moving. Since I’m still a newbie in the Linux (struggling to learn) I felt happy when every thing seemed to work smooth. How ever, I realised after a while that I had lost all permission to my subfolders in the my home folder. I still can read/write the files placed directly in /home/magnus but I'm denied access to any of the subfolders. I just realised one more disturbing thing, probably related to home-partition story above: When I try cd ~/Music/ I get the message bash: cd: /home/magnus/Music/: Permission denied When I try: sudo cd ~/Music/ I get the result sudo: cd: command not found Seems strange that the cd command have been lost? What have I done wrong and is there a way to fix this? btw: I use Ubuntu 12.04 LTS Thanks for all the help! Magnus

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• Ubuntu One Bookmark sync not working.

  - by Rob

  Everything in Ubuntu One sync works great except bookmark sync. I tried the wiki answer that said to run: killall beam.smp beam rm ~/.config/desktop-couch/desktop-couchdb.ini dbus-send --session --dest=org.desktopcouch.CouchDB --print-reply --type=method_call / org.desktopcouch.CouchDB.getPort This is what my terminal came back with: robin@robin-MIDWAY:~$ killall beam.smp beam beam: no process found robin@robin-MIDWAY:~$ rm ~/.config/desktop-couch/desktop-couchdb.ini rm: cannot remove `/home/robin/.config/desktop-couch/desktop-couchdb.ini': No such file or directory robin@robin-MIDWAY:~$ dbus-send --session --dest=org.desktopcouch.CouchDB --print-reply --type=method_call / org.desktopcouch.CouchDB.getPort Error org.freedesktop.DBus.Error.NoReply: Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken. robin@robin-MIDWAY:~$ I'm a computer "newbie" so it's possible I'm doing something wrong, are there any tutorials out there on how to use the CouchDB? I have Bindwood installed.

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• My VPS cannot send email

  - by ifdion

  Webmaster Newbie Question I have a low end vps (128MB RAM)running on Debian.I used a bash script by ilevkov to setup the site. After some trial and error, I managed to set up a WordPress on it. Just now I found out that my VPS can't send any email. I tested using the WordPress reset password email, and it shows The e-mail could not be sent. Possible reason: your host may have disabled the mail() function... After some Google session I noticed that I can send email from ssh. So I tried mail [email protected] Subject: Halo dion some message . and the result said EOT /usr/lib/sendmail: No such file or directory "/root/dead.letter" 9/243 . . . message not sent. The question How can I fix my VPS mail setting?

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• Reviewing the "Oracle Coherence 3.5" Book

  - by [email protected]

    I received the "Oracle Coherence 3.5" book in ebook format from Packt. I have been going through the ebook and I am really amazed with it. It is definitely a great guide for both experienced users and newbies. It is extremely well structured, and it's easy to read and understand. Additionally, the book contains a lot of useful information, including basic and advanced concepts, best practices, very useful tips and very good examples too.   In summary, if you want to become a Coherence expert, even if you are a Coherence newbie, this book is the way to go!   Further information about the book can be seen at Packt.  

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• Permanently disabling touchpad in ubuntu 12.04

  - by Andreas

  I'm looking for a way to permanently disable the touchpad in ububtu 12.04 (my computer is a Lenovo Thinkpad Edge on which it isn't possible to disable it in the bios). I tried the applications GPointingDeviceSettings and synaptiks 0.8.1 as well as the applets touchpad-indicator and Jupiter. None of these does the trick of disabling the touchpad permanently. Jupiter comes closest - it remembers that I have disabled the touchpad after restart - but when I login after the computer has been in suspend mode, the touchpad is enabled again. Can anyone help me in disabling the touchpad possibly at a lower level so it won't in any way be enabled unless I choose to enable it? I'm totally new to linux so a detailed explanation would be much appreciated ... The links, so far, doesn't address my question. I have no problem turning the touchpad off and making it stay off after reboot but when I login after the computer has been in an altered power mode it's on again. Isn't there a way to permanently disable a device like touchpad?

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• Question about Target parameter of Matrix.CreateLookAt

  - by manning18

  I have a newbie question that's causing me a little bit of confusion when experimenting with cameras and reading other peoples implementations - does this parameter represent a point or a vector? In some examples I've seen people treat it like a specific point they are looking at (eg a position in the world), other times I see people caching the orientation of the camera in a rotation matrix and simply using the Matrix.Forward property as the "target", and other times it's a vector that's the result of targetPos - camPos and also I saw a camPos + orientation.Forward I was also just playing around with hard-coded target positions with same direction eg 1 to 10000 with no discernible difference in what I saw in the scene. Is the "Target" parameter actually a position or a direction (irrespective of magnitude)? Are there any subtle differences in behaviors, common mistakes or gotchas that are associated with what values you provide, or HOW you provide this paramter? Are all the methods I mentioned above equivalent? (sorry, I've only recently started and my math is still catching up)

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• sudo credential caching on by default

  - by Dan Dman

  Just installed a minimal ubuntu 12.04, then installed xfce4 and xinit from the command line after first boot. Totally vanilla installation afaik. I'm noticing that sudo caches the password until I issue sudo -k to clear it. This is unexpected behavior in my mind. I've run xfce4 before and don't recall credential caching being on, nor have I experienced it in the many previous ubuntu installs I've had over the years. Is this a new feature of Ubuntu? Is this something that's the result of the minimal install? Is this an xfce default that's been added recently?

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• How to configure Ubuntu with Standard TV?

  - by Ryan Wyan

  Ubuntu 8 version nVidia card with driver 96.43.10-0ubuntu1 /etc/X11/xorg.conf Section "Screen" Identifier "Television Screen" Device "Television Device" Monitor "Television" DefaultDepth 24 Option "TVOutFormat" "COMPONENT" Option "TVStandard" "PAL-B" SubSection "Display" Depth 24 Modes "640x480@40" EndSubSection EndSection Section "Module" Load "glx" Disable "dri2" EndSection Section "Device" Identifier "Default Device" Driver "nvidia" EndSection Television is Sharp FlatX Standard TV, its specifications can be found at http://www.amazon.com/Sharp-X-Flat-32F630-Flat-Screen-32/dp/B0000AKVAV There were other screen sections which I removed. The TV shows just distorted image with just particles of different colors. I tried different resolution but did not figure out. Kindly help me how to setup TV with Ubuntu. I am newbie to this and not aware of subtle technicalities. Thanks indeed.

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