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• How do i stop or turn off the x-server?

  - by Alex

  im trying to do this tutorial: http://wiki.accelereyes.com/wiki/index.php/Installing_CUDA_Under_Ubuntu_10.04 I need the command that would completely stop/turn off the x-server. when i try to install the nvidia developer driver, i get a blue screen telling my Error:cant install with x-server running, please turn it off (something like that). "sudo service gdm stop" worked at the time i guess, (didnt give any errors) but the x-server is still running. is this the command i should be using? thanks for anyhelp!

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• Suggestions for Future or On-The-Edge Languages (2011)

  - by Kurtis

  I'm just looking for some suggestions on newer languages and language implementations that are useful for string manipulation. It's now 2011 and a lot has changed over the years. Most of my work includes web development (which is mostly text-based) and command line scripting. I'm pretty language agnostic, although I've felt violated using PHP over the years. My only requirements are that the language be good at text manipulation, without a lot of 3rd party libraries (core libraries are okay, though), and that the language and/or standard implementation is very up to date or even "futuristic". For example, the two main languages I'm looking at right now are Python (Version 3.x) or Perl (Version 6.x). Research, Academic, and Experimental languages are okay with me. I don't mind functional languages although I'd like to have the option of programming in a procedural or even object oriented manner. Thanks!

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• Exclude category from Wordpress home page unless it belongs to another category

  - by sirlancelot

  I have multiple users adding content to restricted categories (using RoleScoper) in my Wordpress setup that don't show up on the homepage (custom template with query_posts()). I'm looking for a way to "promote" the submitted content to the homepage by adding it to another category. My loop code looks like this: <?php query_posts($query_string . '&cat=-37'); if (have_posts()): while (have_posts()): the_post(); ?> This will exclude all posts in category 37. However, even if I add the post to a different category it still gets excluded. Is there a way to exclude a post if it belongs to just that one category?

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• Cisco Linksys AE2500 wireless adapter not working

  - by makuto

  I have a Cisco AE2500 I've used with my laptop to get internet. I had to install the drivers by following this forum: http://ubuntuforums.org/showthread.php?t=1805830 But now the blue light on the adapter doesn't turn on at all, but ndiswrapper reports it is connected. I have no connection to the internet on my laptop, and the adapter doesn't show it's blue light on any of the USB ports of my computer or on the 4 port hub I have. Is there some way I can reset something so that the blue light will show again? I'm using Ubuntu 11.10 on a Dell Latitude D505 laptop. EDIT: I deleted and reinstalled the same exact driver and everything worked again.

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• JavaScript serait le langage de programmation le plus populaire selon l'indice RedMonk, basé sur GitHub et les sites d'entraide

  JavaScript est le langage de programmation le plus populaire Dans le classement RedMonk, basé sur GitHub et les sites d'entraide Entre popularité et préférence, quel est le meilleur critère pour classer les langages de programmation ? Le bureau d'analyse RedMonk les classe en fonction de leur popularité au sein de la communauté des développeurs sur les sites GitHub et StackOverflow. Le classement de RedMonk révèle un tout autre résultat comparé au classement par l'indice de TIOBE que nous relevons périodiquement sur Developpez.com. En effet, chez RedMonk on retrouve JavaScript en tête de liste, suivi de près par Java, PHP...

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• How to set up bridged networking in Xen?

  - by Joe Carr

  I have 2 domU virtual machines installed on a 11.10 Oneiric Dom0. My internal network is on the 192.168.1 subnet, and when the domU's start, they get ips on the 192.168.122 subnet. I have attempted to follow the instructions here : http://wiki.kartbuilding.net/index.php/Xen_Networking xend-config.sxp is configured correctly, but neither of my domU's have a config file in /etc/xen to modify. ifconfig reports that I have the following devices : eth0, lo, tap3.0, vif3.0, vif4.0, virbr0 bridge-utils is installed. I also just attempted to follow these steps : http://serverfault.com/questions/233201/bringing-the-xenbr0-interface-up-on-xen-under-ubuntu-8-04 sudo brctl addbr xenbr0 sudo brctl addif xenbr0 vif3.0 device vif3.0 is already a member of a bridge; can't enslave it to bridge xenbr0. Any ideas on next steps are greatly appreciated!

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• Welcome to my blog!

  - by Thomas Mason

  I am a 21 year old Web Developer, with over five years experience in the PHP field. Covering Javascript - jQuery & Ajax, mySQL, JSON and CSS. Out of the five years experience, three have been as a freelancer, the rest commercial work. (I have to say freelance is more comfortable whereas commercial really does get you to do things out of the box.) This blog will cover problems I come across and the solutions I came up with. Bringing ideas into reality - even if it's never been done before! Overall I hope to bring new ideas and my experience to developers old and new.

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• Ubuntu chroot “No such file or directory”

  - by Paris

  Hi there. I hace a web application where I create some folders on my server and put executables there. Then I try to wun them with chroot but I get a message that access is denied there. I tried chroot -r 777 blah blah.... and then I get a message that the folder or the file that I call (sudo chroot mydirectory myfile_inside_Mydirectory) does not exist. This happens only when I call chroot on folders created by the web server. My web application is in php and I use: shell_exec("cp -R /var/www/comp/prison/bin $dir"); shell_exec("cp -R /var/www/comp/prison/lib $dir"); shell_exec("cp /var/www/janitor.out $dir/janitor.out"); shell_exec("sudo chmod -R 777 $dir"); $process = proc_open("sudo chroot $dir janitor.out", $descriptorspec, $pipes); sudo does not need password.

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• Slashdotted web site seeks new home

  - by Arthur Edelstein

  I am maintaining a website that contains mostly simple html (just a little php). Normally the site receives only 4000 hits per month, but it was recently slashdotted by the New York Times (30,000 visitors and 30 GB in a day) and the web host provider (bluehost) throttled the CPU in response. This slowed down the website considerably. What web host providers would offer a more scalable solution? Ideally I would like a high-quality host that charges by the GB and can handle bandwidth to expand during sudden slashdotting episodes without a reduction in performance.

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• flashplugin installer works for firefox but not chromium-browser

  - by user829755

  I'm on Ubuntu precise (12.04.5 LTS) and I do have flashplugin-installer installed. When I click on flash videos in chromium-browser I get "An error occurred, please try again later". In firefox they display fine. I opened chrome://plugins to see if the flash plugin is installed and indeed it's not listed. Also http://www.codegeek.net/flash-version.php displays: "You do not have Flash player installed", while with firefox it says: You have Flash player 11.2.202 installed. Following some instructions on some ubuntu page I copied the plugin using sudo cp /usr/lib/flashplugin-installer/libflashplayer.so /usr/lib/chromium-browser/plugins/ and I started chromium using chromium-browser --enable-plugins but this didn't help. chrome://chrome/ says: Version 36.0.1985.125 Ubuntu 12.04 (283153). what else can I try?

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• Ubuntu Suspend won't wake by mouse

  - by corsen

  I just installed Ubuntu 11.04 and realized that suspend would not wake by either keyboard or mouse. After following instructions from here: http://ubuntuforums.org/showthread.php?t=1642817 The system will now wake by keyboard. I have a USB mouse it is a logitech G5. Even if I enable all of the USB devices listed in /proc/acpi/wakeup, my computer will still not wake up via mouse. I'd really prefer to wake by mouse instead of keyboard due to cats. Does anyone know why my mouse won't wake the machine even after enabling all USB devices listed? Thanks, Bryan

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• How to reverse file ownership and permission settings

  - by pandisvezia

  I installed LAMP and WordPress on my system a week ago. Since I couldn't create Child Themes in WordPress and work with PHP folders for my other projects collocated in var/www without using Nautilus I wanted to solve the permissions issue. I hoped to bring a solution carrying out the commands on this page for my WordPress folder: http://wiki.apache.org/httpd/FileSystemPermissions. This allowed me to play with any file in the folder like creating and modifying .css files through WP Admin, etc. But after a restart I discovered that I can't change DNS settings of my network connections in the list anymore because it is asking me the root password and even though I enter the password it doesn't let me do the action giving "insufficient privileges" error. Can you help me correct the mistake I possibily made during the configuration and, maybe, configure again the permission and ownership settings for var/www/somefolder as it is adviced to be configured under general circumstances? Thanks in advance!

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• Can't install wireless driver or get ubuntu to recognize ethernet cable

  - by Catherine

  I'm brand new to Ubuntu and I'm tearing my hair out trying to figure out how to connect to the internet. When I try to activate the Broadcom STA wireless driver, it says "Sorry, installation of this driver failed. Please have a look at the log file for details: /var/log/jockey.log." So I try the steps detailed here http://ubuntuforums.org/showthread.php?t=1967515&highlight=jockey Problem is, I can't connect to the internet via ethernet cable either. I tested the cable with another laptop and it works just fine. I don't know what to do. Any help is greatly appreciated.

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• Mobile phone detection (brand, model, browser etc)

  - by SyaZ

  What do you use to detect visitor's mobile phone, down to the model if possible? Currently we maintain our own database but it's really getting behind due to lack of manpower to maintain it, so we decided to give 3rd party solution a try. These are my candidates but I don't have time to really try them all: DeviceAtlas - 1 year personal evaluation, but basic license is affordable. Their database look solid with daily update and user-contributed tests / updates. I am favoring this one at the moment. DetectRight - I was recommended this by a colleague but really can't find much from their site. 20k devices -- really? WURFL - Open source, database collaboratively derived from UAProf. So basically if you're going with UAProf solution, you're better off with WURFL. DetectMoBileBrowsers - This looks like the simplest of all. Too bad it's language dependent (PHP). Please share your experience or suggestions!

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• How much should I charge for a web app

  - by Kostas

  I am a freelance web developer and I am working on a PHP/MySQL/Javascript based project. It's a web app that uses a custom CMS with user types, followers system, search forms, blogs, social integration. It will take about 3 months to finish, according to a roadmap I make (based on current development stage) and about a month after that for bug fixing and testing. So I have to tell them a price. What price range you think it's appropriate?? (It's a good regular client, so I want something reasonable) Can you give me some ideas?? Thanks.

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• Page Load Time - "Waiting on..." taking ages. What part of page request process is hung?

  - by James

  I have a new cluster site running on Magento that's on a development server that is made up of 2 x web servers and 1 x database server. I have optimized the site in all areas I know (gzip, increasing php memory limits, increasing database memory limits etc) but sometimes the page loading gets stuck on 'waiting for xxx.xx.xx.xxx' (Chrome and other broswers, chrome just shows it that way). It can sit there for 40 + seconds, sometimes it just never loads and I close it in frustration. What part of the page loading process is this hung at? Is it a server issue, database issue, platform issue? I need to know where to start or whether to push the hosting provider about it.

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• Can I make query strings produce separate pages?

  - by John Smith

  I have a profile page with a URL like so: localhost/profile.php/?username=Bob I was wondering, if I had a separate <title> which changed according to the username, would they produce separate pages in the google search results? How do I tell Google to only use the username string or does it search within the title? On a similar note, how would I create a separate page with the username like so: localhost/bob instead of a query string like facebook does. Do that make a new file for each user?

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• Nginx unable to connect

  - by nish

  I am referring to this link to install Nginx on Ubuntu: Installing Nginx With PHP5 (And PHP-FPM) And MySQL Support (LEMP) On Ubuntu 13.04. sudo su — Runs OK. apt-get install mysql-server mysql-client mysql-client is already the newest version. mysql-server is already the newest version. Yet when I try http://localhost on Firefox it does not show the welcome page. (That is Nginx is not running). Unable to connect Firefox can't establish a connection to the server at localhost.

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• Redirect AFTER Initiating download

  - by mashup

  I have a question - is there any way to initiate a download and AFTER the user has confirmed the download then redirect to another site? Is something like that possible via ASP or another language commonly used for websites? Bad PHP "user experience" scenario (In use right now) a) User comes to site, clicks download button b) Users sees "download" landing page, gets redirected after 5 seconds c) Download starts on Thankyoupage Good "user experience" scenario: (my dream solution, what I want) a) User comes to site, clicks download button b) Download starts immediately on landing page c) Download confirmed, redirects now to thank you page Any programming language is a go for this.

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• Install Java on Ubuntu server (Parallels Plesk)

  - by atMaarten

  I want to install Java to my server so I can use PHP shell_exec to compile Java online. So I'm trying to install Java on my webserver (Ubuntu - Parallels Plesk). I logged in to the server with PuTTY and tried some commands like: sudo apt-get install openjdk-6-jre or sudo apt-get install oracle-java7-installer But than I get error's like: Package drweb-bases must be reinstalled, but there can be no archive found. I tried to uninstall drweb-bases, reinstall, no matter what. I still get that error. What you I need to do? I am doing it completly wrong? Am I not destroying my webserver? There is not much to find on this topic on Google.

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• What's the current best practice for C multithreading?

  - by Dexter

  I've been a Java (and PHP) developer for most of my life, but will need to use C for my next project. I remember some basic stuff we did back in school with fork, pthread, semaphores, etc. but I'm not sure if that's still the "way to go" here, or if there have been any recent developments/improvements etc. Google's results seem to be fairly dated. Or does that just mean that this is still the current "state of the art"? Or will I have to use a (system-independent) libary like glib if I want higher-level abstractions, like synchronized queues? What other libraries are there? (The programm will only have to run on Linux though)

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• Pay for Graphic Designer vs Programmer

  - by FrankSinatra

  In a corporate web-design setup, who typically makes more per hour, the graphic designer or the programmer? By graphic designer, I mean somebody who builds mockups probably in photoshop, selects font-styles, colors, etc. Most things layout-wise are near pixel-perfect, but likely after the initial implementation by the programmer, there will be a lot of small changes directed by the graphic designer. By programmer, I mean somebody who is coding the CSS, the HTML, and light backend support, probably in PHP. The programmer will attempt to duplicate the mockups given the limitations of the medium, and consult with the graphic designer afterwards on what changes are tangible and which are not. Both probably have an undergraduate degree from a respected four-year institution.

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• Make a flowchart to demonstrate closure behavior

  - by thomas

  I saw below test question the other day in which the author's used a flow chart to represent the logic of loops. And I got to thinking it would be interesting to do this with some more complex logic. For example, the closure in this IIFE sort of boggles me. while (i <= qty_of_gets) { // needs an IIFE (function(i) promise = promise.then(function(){ return $.get("queries/html/" + product_id + i + ".php"); }); }(i++)); } I wonder if seeing a flowchart representation of what happens in it could be more elucidating. Could such a thing be done? Would it be helpful? Or just messy? I haven't the foggiest clue where to start, but thought maybe someone would like to take a stab. Probably all the ajax could go and it could just be a simple return within the IIFE.

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• What does a node.js web application's setup look like on a real production server?

  - by joe

  Being new to node js magic world, i'm wondering how does a web application's setup look like on a real production server? So far all tutorials, create the js file that is started from a console...and that's it. Anyone has created a real world web app that uses node js in the back end? Can you please describe how is it setup, and how reliable this infrastructure is ? I'm coming from the asp.net and php world that require heavy web servers...and can't have a clear idea about node stuff.

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• Wifi is connected but internet not working?

  - by Philip

  I have a lenovo x230 running ubuntu 12.04lts. I've been using it just fine for a while, but all of a sudden the internet's stopped working. It's connected to the router just fine (I can see the antenna bars saying it's connected) but when I try to go to a webpage, it's just loading forever. I've tried the fix listed here (http://ubuntuforums.org/showthread.php?t=1985079) but it hasn't done anything (the instructions are a little confusing though). I'm booting windows 7 right now and the internet works just fine when I'm on windows, so I know it must be a problem with ubuntu. I haven't touched any network settings before this problem happened, and I've been using it just fine for months, so I don't know why I'm getting this problem all of a sudden. Oh and I haven't updated anything in a few weeks (you know when the update manager pops up every so often listing all the things there's an update for) so I know it's not some update that broke it.

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