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Articles indexed Sunday October 20 2013

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• Should I keep investing into data structures and algorithms?

  - by Chiron

  These days, I'm investing heavily in data structures and algorithms and trying to solve some programming puzzles. I'm trying to code and solve with Java and Clojure. Am I wasting my time? should I invest more in technologies and frameworks that I already know in order to gain deeper knowledge (the ins and the outs) and be able to code with them more quickly? By studying data structures and algorithms, am I going to become a better programmer or those subjects are only important during college years?

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• Asus N46VZ prouduces more heat when on ubuntu compared to windows

  - by Blaze Tama

  First, i just used ubuntu as my main operating system, so please bear with me. My Asus N46VZ temps is pretty high when im on ubuntu (13.10). The temps are 60C even though i just open a browser. This does not happened on windows, where the temps is just around 50C. I did some research and some people said that the problem might be on my graphic card. I have an intel HD 4000 and GT 650m. So i tried to check my system settings and it said im using "Intel® Ivybridge Mobile". So, i tried to check the "additional drivers" tab on software & update settings but i found nothing there. The point is, i still dont know what make my laptop "overheating". The VGA part is just my guess (and is still dont understand what is the correlation between my VGA and the heat, and everything except the temp seems fine). Any help is appreciated. Thanks for your help :D

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• How to clear unshown OSD notifications

  - by Avatar Parto

  I am a webmaster of 2 active websites. Every time I start Thunderbird, it downloads all the new messages from the admin mail addresses of these sites - [email protected], [email protected], [email protected], etc. There are about 20 of them - this includes my personal email accounts. Now, am not always connected to the internet and there arises cases where I need to access already downloaded mails. Thunderbird then tries to connect to the internet, which it can't coz am offline, and then displays about twenty OSD notifications, one after the other, telling me that connection for each email address has failed. That's frustrating and it really eating me up. Am looking for a way, either: 1. To tell Thunderbird NOT to connect to the internet when am offline, or 2. To clear all these notifications after like the first one shows. And if it will help, am using ubuntu 13.04 and Thunderbird 24.0 and I always keep my computer fully updated. Any help is welcome. Thanxs.

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• Change reply-to in evolution

  - by ?????? ????????

  I am getting in my inbox on gmail mail from multiple addresses. When I get e-mails in gmail I can choose reply-to address. Is there such a possibility in Evolution? I know that in the advanced settings, you can specify the return address for the account, but how to make sure that there was a list of multiple addresses and be able to choose just one? Or maybe there is a possibility that at once expose the return address for letters?

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• arm-none-ebai-gcc does not work from mounted directory

  - by dmytro_lviv

  I want to build project for ARM micro controller. For this purpose in folder with project was placed script, which download toolchain and build him. After run this script toolchain was placed in folder with project. Folder with project placed on another logical disk (which shared between Win and Linux) and this disk is mounting each time when I start develop. (Mount by hand). When I start make, in terminal I receive error: make[3]: arm-none-eabi-gcc: Command not found The output from echo $PATH: /mnt/Smoothie-master/gcc-arm-none-eabi/bin:/usr/lib/lightdm/lightdm:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games The output from whereis arm-none-ebai-gcc: arm-none-ebai-gcc: All binaries files, which are relating to this toolchain are placed in the next directory: /mnt/Smoothie-master/gcc-arm-none-eabi/bin/ and has permissions: "-rwxrwxrwx" Before building this toolchain, I had another similar toolchain (another version of this), but installed through apt-get. And it was removed through apt-get before building new. Where is the problem? Thanks!

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• VertTwoFingerScroll and VertEdgeScroll not settable via xorg.conf

  - by James Wood

  I've just upgraded to Saucy (this was working in Raring). I've tried rebooting. Here's /etc/X11/xorg.conf: Section "InputClass" Identifier "Touchpad" Driver "synaptics" MatchIsTouchpad "on" Option "PressureMotionMinZ" "60" Option "MaxTapMove" "4" Option "PalmDetect" "1" Option "VertTwoFingerScroll" "1" Option "VertEdgeScroll" "0" EndSection And here's the output from synclient: LeftEdge = 100 RightEdge = 2408 TopEdge = 71 BottomEdge = 1249 FingerLow = 1 FingerHigh = 1 MaxTapTime = 180 MaxTapMove = 4 MaxDoubleTapTime = 180 SingleTapTimeout = 180 ClickTime = 100 EmulateMidButtonTime = 75 EmulateTwoFingerMinZ = 282 EmulateTwoFingerMinW = 7 VertScrollDelta = 56 HorizScrollDelta = 56 VertEdgeScroll = 1 HorizEdgeScroll = 1 CornerCoasting = 0 VertTwoFingerScroll = 0 HorizTwoFingerScroll = 0 MinSpeed = 1 MaxSpeed = 1.75 AccelFactor = 0.0705716 TouchpadOff = 2 LockedDrags = 0 LockedDragTimeout = 5000 RTCornerButton = 2 RBCornerButton = 3 LTCornerButton = 0 LBCornerButton = 0 TapButton1 = 1 TapButton2 = 3 TapButton3 = 0 ClickFinger1 = 1 ClickFinger2 = 1 ClickFinger3 = 0 CircularScrolling = 0 CircScrollDelta = 0.1 CircScrollTrigger = 0 PalmDetect = 1 PalmMinWidth = 10 PalmMinZ = 200 CoastingSpeed = 20 CoastingFriction = 50 PressureMotionMinZ = 60 PressureMotionMaxZ = 160 PressureMotionMinFactor = 1 PressureMotionMaxFactor = 1 ResolutionDetect = 1 GrabEventDevice = 1 TapAndDragGesture = 1 AreaLeftEdge = 0 AreaRightEdge = 0 AreaTopEdge = 0 AreaBottomEdge = 0 HorizHysteresis = 14 VertHysteresis = 14 ClickPad = 0 Notice that PressureMotionMinZ, MaxTapMove and PalmDetect are as specified in xorg.conf, but VertEdgeScroll and VertTwoFingerScroll aren't. I can set them temporarily via synclient VertEdgeScroll=0 and synclient VertTwoFingerScroll=1, but these changes are lost when I reboot. What's the best way of fixing this?

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• Unable to boot from USB boot drive for AMD Athlon 64

  - by Nagarjun

  I am trying to install Ubuntu 13.04 ISO for AMD64 Athlon processor using USB drive (8GB). I did create a bootable USB using the USB installer from Win7 intel 32bit processor (followed steps from here: http://www.ubuntu.com/download/desktop/create-a-usb-stick-on-windows). This USB is unable to boot on my AMD64 bit processor. The bios is able to detect the USB and once I change the boot order to USB and save exit from bios, I get a message saying "DISK BOOT FAILURE, INSERT SYSTEM DISK AND PRESS CONTINUE" and unable to proceed further. However earlier to this I have successfully installed Ubuntu 13.04 on to my laptop which has Intel 32 bit core i5 processor with the same procedure but my desktop which has AMD64 is failing. I also tried to create the USB installer on my desktop which has the AMD64 bit processor and tried booting which also resulted in the same error. (My desktop currently has Win XP) Please help as I have run out of options. thanks, Nagarjun

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• Install Everpad on Ubuntu 13.10

  - by Muhammad Ahmad Zafar

  I just installed a fresh copy of Ubuntu 13.10 and wanted to install Everpad but there is some issue as the PPA for it is missing it. These were the commands which I execute (took help from http://www.webupd8.org/2012/09/everpad-integrates-evernote-with-ubuntu.html and everywhere its the same): sudo add-apt-repository ppa:nvbn-rm/ppa sudo apt-get update sudo apt-get install everpad The following which what I get when the last command is executed: Reading package lists... Done Building dependency tree Reading state information... Done E: Unable to locate package everpad Please help

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• Downgrading Ubuntu 13.10 [duplicate]

  - by empec

  This question already has an answer here: How to roll back Ubuntu to a previous version? 9 answers I'd like to downgrade from Ubuntu 13.10 back to an older version. i.e. 13.04. Can I just boot ubuntu installer, uninstall Ubuntu 13.10 and install 13.04 without any problems to my home folder?

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• Evince 3.10 with menubar

  - by user43787

  I find that the 2 buttoms menu from the evince v3.10.0 are not really useful. Why did ubuntu NOT re add an menubar?. It would have been looking better in unity ! The unity top panel has enough space for an normal program menu. Here is an screenshot of what i mean: (The program works already in ubuntu 13.10 with unity or cinnamon fine. Some little compiler warnings but nothing more) Example in Cinnamon or in unity

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• Resume upgrade to 13.10

  - by DmitryR

  I had 13.04 and started to upgrade to 13.10. But the computer hanged and I rebooted it. I did instructions from How do I resume a release upgrade/update? Now OS launches, but I upgrade is incomplete: there is no panels in Unity (just a background with some files on Desktop). I think that some post-install scripts didn't launch. Please help me with this trouble. P.S. Or how can I completely reinstall unity (with all of the dependencies)? My be it helps. ubuntu@ext:~$ cat /etc/lsb-release DISTRIB_ID=Ubuntu DISTRIB_RELEASE=13.10 DISTRIB_CODENAME=saucy DISTRIB_DESCRIPTION="Ubuntu 13.10" ubuntu@ext:~$ sudo do-release-upgrade Checking for a new Ubuntu release No new release found

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• Universal Pen Drive Linux Will Not Burn IOS Ubuntu 13.10 To USB [duplicate]

  - by Nick

  This question already has an answer here: How to create a bootable USB stick? 4 answers Universal Pen Drive Linux will not let me burn the iso to my usb. Whenever I attempt it it says 'can not open file 'E:*where I put my downloads*\ubuntu-13.10-desktop-amd64.iso' as archive'. Any help please. I just want to move to ubuntu and hopefully never have to use windows again :D Please help me and walk me through this process.

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• CUPS Authentication for Admin on localhost:631 interface

  - by Tony Kruse

  I have searched quite a bit, saw the one response that purported to have a solution to this but it did not work in my case. My Brother printer is not shown in CUPS so I go to Admin-Add Printer it gives me the User Name/Password popup with refuses to recognize my user name on the machine. This is a brand new install of 13.1. My Restrict Access to the admin pages section has: Order allow, deny Allow localhost

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• running adb via wifi on ubuntu 13.04

  - by Blaze Tama

  First, im new on linux so please bear with me. I have a rooted android phone and i was able to run the adb via wifi network on windows, where i just need to go to the adb's directory and type adb connect. However, i can't just do that in my ubuntu. Everytime i enter adb connect, the terminal always said that i dont have the adb and i must install it. When i check the ADT Bundle (I downloaded the bundled one from here), i can see the adb is there inside the platform-tools folder. I already tried to change the directory to the platform-tools and run the adb connect from there, but its still not working. Do i need to install the adb again via terminal? Or did i miss something? You may be wondering why dont i just download the adb (again) via terminal and do trial and error? The answer is because i dont have a good internet connection, so i want to avoid unnecessary downloads. Thanks for your time :D

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• Ubuntu 12.04 won't shut down - stopping winbind daemon

  - by jan

  My Precise Pangolin sometimes won't shut down - the screen is black with text on it. Mostly last line says something like "stopping winbind deamon" (sometimes also virtualbox, which is above winbind daemon; edit: sometimes the last line says "running unattended updates") and it stays like this for about ten miutes. Then I usually hold the power button for 5s to shut it down. It's very unpredictable - sometimes the computer shuts down without problem and sometimes it hangs. I've tried many ways to shut it down: HW button, panel applet, sudo shutdown -h now, sudo poweroff, sudo halt, etc. even sudo reboot or restart from panel applet have this problem. Sometimes it works ok but every method named hung at least once on the same (damned) line. My specs: FUJITSU SIEMENS LIFEBOOK E8310, Intel Core2 Duo T7300 @ 2.00GHz, 3GB RAM, GPU: Mobile Intel(R) 965 Express Chipset Family Ubuntu 12.04.2 32bit, 3.5.0-41-generic kernel (but it did it on older kernels and 12.04.x systems too). Any ideas what should I try next? Thanks a lot! Jan

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• Acer aspire v3 771G ubuntu 13.04

  - by Jos

  Gooday, i have this acer and i have alot of boot problems (i suspect windows 8) and now i want to try ubuntu but when i use an usb to "try" ubuntu after the boot i get a black screen. now ive read some of the forums and i found something about NOMODESET i have not tried this as i dont know what this does exactly. now i have found this wiki entry https://wiki.ubuntu.com/Bumblebee , i am by far no programmer and always reading all those commands have always kept me of linux because im scared i will !@#$ things up. is there anyway i can go to NOMODESET in the ubuntu "trial" and can i also include the bumblebee futures (coding?) and in how many ways wil this affect my laptops perfomance? reading the bumblebee entry its seems to be something about nvidia optimus and i dont reallt care much for the power saving, but will it affect any performance? im not a heavy pc gamer but i like tho do some gaming and streaming and such also on a rather big TV in wich this laptop already has it flaws in some games not running properly on 65" if this doesn't work or u advise me not to do this what else can i do to fix windows 8 or either some other linux version? i thankyou in advance

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• How to install Google drive? [duplicate]

  - by Tamal Das

  This question already has an answer here: Is there a Google Drive client available? 9 answers How to install Google drive in Ubuntu 13.04? I am trying to find out an installation file from Internet (by using Google search). But, am not able to find out such installer.

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• Electricsheep Not Working in Raring 13.04

  - by Nhoeh37

  I just downloaded Electricsheep four days before I updated my Ubuntu software and I fell in love with it. After I upgraded to 13.04, I'm kind of upset in saying that Electricsheep no longer works. I have no idea how to fix it and I feel helpless with Linux. As I said, it was working completely fine in 12.10, but now with the Raring Ringtail update: I use Xscreensaver to launch Electricsheep. When I open Xscreensaver, "Electricsheep" is one of the options to choose. When I "preview" ES or even launch the "xscreensaver-demo" in the terminal, it doesn't work anymore; I get an error message. The error message says: "detected another electric sheep process. rendering of sheep is disabled using read only access." Damnit, can someone please help me? I want my trippy screensaver back, it shouldn't be this hard! EDIT: I contacted the creator of Electricsheep (Scott Draves) via the link to his email address on his personal website and asked for his assistance. Hopefully the Askubuntu community will be able to fix this problem, I'm sure I am not the only one who is having this problem as I have searched and searched.

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• My First robots.txt

  - by Whitechapel

  I'm creating my first robots.txt and wanted to get a second opinion on it. Basically I have a FTP setup on my board for some special users to transfer files between each other and I do NOT want that included in the search by the bots. I also want to point to my sitemap which gets auto generated by a PHP page. So here is what I have, what else should I include, and if I need to fix anything with it? Also, it's linking to xmlsitemap.php because that generates the sitemap when called. My goal is to allow any search bot crawl the forums to grab meta data. User-agent: * Disallow: /admin/ Disallow: /ali/ Disallow: /benny/ Disallow: /cgi-bin/ Disallow: /ders/ Disallow: /empire/ Disallow: /komodo_117/ Disallow: /xanxan/ Disallow: /zeroordie/ Disallow: /tmp/ Sitemap: http://www.vivalanation.com/forums/xmlsitemap.php Edit, I'm not sure how to handle all the user's folders under /public_html/ since the robots.txt will be going in /public_html.

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• Remote Access to MSSQL Database From 1&1 Hosting [duplicate]

  - by Zerkey

  This question already has an answer here: How to find web hosting that meets my requirements? 5 answers I just paid ($6 /month) for shared Windows hosting through 1&1 hosting. I was having trouble connecting to my database from home, so I sent an email to support. I received the following response: As we checked your concern here in our end, please be advised that due to limitation of Shared Hosting services, there is no option to connect the database to your SQL Management Studio or through Visual Studio. It is only possible for Dedicated Server package. You may only access the database using MyLittleAdmin at the Control Panel. A dedicated server is like $200 per month! What is the point of having database access only through a web console? I feel I am missing something here, or maybe the support agent is. Is there a way to access my MS SQL database on their servers through Visual Studio or SQL Management Studio from my machine? If not, is there a web host who allows this for less than $200 a month? EDIT: Marked as duplicate... I'm not asking for a list of web hosts, I'm asking how to remotely connect to my MSSQL database through 1&1's services.

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• The actual difference between styesheet in the header and a seperate file

  - by David Knight

  Am wondering if someone can give me an opinion on this. I have always been taught to have all of the CSS in a separate file that is referenced from the head of the page. Reading this article http://www.lukew.com/ff/entry.asp?1792 the author is talking about making the Guardian website responsive. One of the things he notes they did to make the site faster and more resilient is to add the CSS inline into the header, thus reducing HTTP requests. Now this got me thinking about the right/best/fastest way of using the CSS If you have one main CSS file, its going to be called and read by the site on every page, no mater how big it is. So with that in mind, Im actually starting to think its better to just inline the whole style sheet and remove one HTTP roundtrip. I know for the purposes of neatness and being able to edit the file a seperate file is better. But which would you recommend and which do you think is faster? Thanks!

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• Mobile traffic of my second site redirected to my base site [Edited,have a look]

  - by Faheem Rasheed

  I have a strange issue with my website and it seems i am unable to understand what cauese the problem.I would highly appreciate your help.The Scenario is I have two websites. Website A Website B Website A is simply hosted within the root directory of my hosting account.Within this root *directory* i have a sub folder " subfolder A " and within which is another subfolder " subfolder B " that contains my site Website B so the path looks like root/sublfolder_A/subfolder_B/ that contains my **Website B ( i.e subfolder_B) ** All goes fine.When i access the website B from my desktop/Laptop Website B is loaded normally. but when i access the Website through a mobile device , mobile site of Website A is loaded while as it should load website_B Also , to let you know , both websites have different URL's and not subdomain's or anything. What could be the problem ? htaccess of website B or website A ? or something else ? Here is the htaccess of my website B RewriteEngine On RewriteRule .* index.php [F] RewriteBase / RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}] RewriteCond %{REQUEST_URI} /component/|(/[^.]*|\.(php|html?|feed|pdf|vcf|raw))$ [NC] RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule .* index.php [L]

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• Is Google DFP a replacement for ad rotate plugin?

  - by EPQRS

  I'm currently using Ad-Rotate WordPress plugin on my WordPress site. I recently came to know of Google DFP. I'm currently adding 1-5 ads per day which will increase soon and am wondering if Google DFP is an alternate solution to Ad Rotate plugin. I want to mainly show ours and clients' ads and not AdSense. I'm just looking for an ad manager and was wondering if Google DFP is the right alternate solution. Where can I find a tutorial on how to use (add ads) Google DFP? (I already have an AdSense account)

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• Location-Based redirection and duplication in sub-directories affecting SEO

  - by Joshua

  I currently own the website www.xyz.com. The website has a sub-directory for each of the 3 target countries: .../en-US/ (United States), .../es-MX/ (Mexico), and .../es-DO/ (Dominican Republic). I have two main questions about this setup: Currently, the main domain/root (xyz.com) contains a blank index.php file, but I would like for a user to be redirected to one of the sub-directories based on their regional location. What is the best way to accomplish this? I have looked at using browser language-based redirection, but how would I know whether to direct a user to the MX or DO site if the browser language is set to spanish? Is there a way to detect a user's geographic location? Also, the 3 websites are practically identical except they all have 3 unique color schemes and the US site is in english while the MX and DO sites are in spanish. My problem is that I believe GoogleBot is penalizing/banning my site because the spanish text on the MX and DO pages are nearly identical and are thus marked as duplicates/spam. Is there a way to avoid this?

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• Drawing chunks, and positioning the camera

  - by Troubleshoot

  I've seen many questions and answers regarding how to draw tiled maps but I can't really get my head around it. Many answers suggest either loading the visible part of the map, or loading and unloading chunks of the map. I've decided the best option would be to load chunks, but I'm slightly confused as to how this would be implemented. Currently I'm loading the full map to a 2D array of buffered images, then drawing it every time repaint is called. Q1: If I were to load chunks of the map, would I load the map as a whole then draw the necessary chunk(s), or load & unload the chunks as the player moves along, and if so, how? My second question regards the camera. I want the player to be in the centre of the X axis and the camera to follow it. I've thought of drawing everything in relation to the map and calculating the position of the camera in relation to the players coordinates on the map. So, to calculate the camera's X position I understand that I should use cameraX = playerX - (canvasWidth/2), but how should I calculate the Y position? I want the camera to only move up when the player reaches cameraHeight/2 but to move down when the player reaches 3/4(cameraHeight). Q2: Should I check for this in the same way I check for collision, and move the camera relative to the movement of the player until the player stops moving, or am I thinking about it in the wrong way?

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