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  • How to fix Duplicate sources.list entry?

    - by Harbhag
    I keep getting this warning whenever I try to run sudo apt-get update. W: Duplicate sources.list entry http://archive.ubuntu.com/ubuntu/ precise-updates/main i386 Packages (/var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_precise-updates_main_binary-i386_Packages) W: You may want to run apt-get update to correct these problems Below is the output from /etc/apt/sources.list file: deb http://archive.ubuntu.com/ubuntu precise main restricted deb-src http://archive.ubuntu.com/ubuntu precise main restricted deb http://archive.ubuntu.com/ubuntu precise-updates main restricted deb-src http://archive.ubuntu.com/ubuntu precise-updates main restricted deb http://archive.ubuntu.com/ubuntu precise universe deb-src http://archive.ubuntu.com/ubuntu precise universe deb http://archive.ubuntu.com/ubuntu precise-updates universe deb-src http://archive.ubuntu.com/ubuntu precise-updates universe deb http://archive.ubuntu.com/ubuntu precise multiverse deb-src http://archive.ubuntu.com/ubuntu precise multiverse deb http://archive.ubuntu.com/ubuntu precise-updates multiverse deb-src http://archive.ubuntu.com/ubuntu precise-updates multiverse deb http://archive.ubuntu.com/ubuntu precise-security main restricted deb-src http://archive.ubuntu.com/ubuntu precise-security main restricted deb http://archive.ubuntu.com/ubuntu precise-security universe deb-src http://archive.ubuntu.com/ubuntu precise-security universe deb http://archive.ubuntu.com/ubuntu precise-security multiverse deb-src http://archive.ubuntu.com/ubuntu precise-security multiverse How do I fix it?

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  • Beginning programming for real clients, what copyright should I put in the code?

    - by Igor Marvinsky
    Hello. So far, I've been writing projects for my friends and friends of my friends, which required no legal stuff. Now I've moved on to freelance programming on websites like vworker.com and I'm wondering what should I put in the comments on top of the code. I'm not doing big, serious serious projects, just frontends and scrapers/bots for what I gather is personal use. Would my usual // Written by Igor Marvinsky, 2011 be enough?

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  • App Engine Hangout - chat with an App Engine Software Engineer in Test

    App Engine Hangout - chat with an App Engine Software Engineer in Test We'll be chatting with Robert Schuppenies, who is an App Engine Software Engineer in Test. He'll describe a bit about what he does, and talk about/demo some App Engine test frameworks, like the testbed module, code.google.com and code.google.com From: GoogleDevelopers Views: 0 0 ratings Time: 00:00 More in Science & Technology

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  • Working with Legacy code #3 : Build a safety net.

    - by andrewstopford
    The first port of call in changing legacy code is a safety net, without one your fingers will get burnt. Make your safety net a high level functional test over the major areas of the application. Automate the test, plug it into your CI builds and run it every night. The test should act as a final fail safe as you work.

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  • How to solve SocketException: Permission denied: connect

    - by luxinxian
    I recently encountered a problem getting a headache, need help... System consists of: Two subsystems, called A, B (each running on a standalone tomcat instance), currently running on the same machine. A invoke B's service via spring httpInvoker(http). B system also invoke other system's services via http. Symptoms: 1, the system starts to run normally after 10-15 days; 2, the system will run for a period of time after an exception: org.springframework.remoting.RemoteAccessException: Could not access HTTP invoker remote service at [http://xxx.xxx.xxx.xxx/remoting/call]; nested exception is java. net.SocketException: Permission denied: connect 3, when the exception occour, it continues, not only occasional .(it looks like some resources exhausted, but cpu rate < 5%, memory < 15%, network < 5%) 4, A, B when the system call fails, B system via http call to an external service also failed for the same exception. 5, closed two tomcat services, restart, and working properly. So repeatedly (step 1 - 5), has not found the root reason. Emvironment: windows 2008 R2 tomcat7.0.42 x86_64 oralce-jdk-1.7.0_40 Any ideas?

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  • How To Find Reasons of Why Site Goes Online/Offline

    - by HollerTrain
    Seems today a website I manage has been going online and offline throughout the entire day. I have no idea what is causing the issue so I am seeking guidance on where to start. It is a Wordpress based site. So here is what I DO know: I use a program that pings the server every minute and when the server is not responding me it emails me, so I can know exactly when the site is online and offline. The site between 8pm to 12pm 12.28, and around the 1a hour early morning 12.29 (New York City timezone, and all times below are in same timezone). At the time of the ups/downs I see a lot of strain on the memory usage. Look at the load average when the site is going online/offline (http://screencast.com/t/BRlfXkqrbJII). Then I ran this command to restart http (http://screencast.com/t/usVtYWZ2Qi) and the memory usage then goes down to this (http://screencast.com/t/VdTIy3bgZiQB). An hour after I restarted http, the site then went offline/online so restarting the http didn't do much help. When the site is going offline/online, I ran the top command and get this (http://screencast.com/t/zEwr7YQj3). Here is a top command when the site is at it's lowest (http://screencast.com/t/eaMfha9lbT - so this would be dubbged "normal"). Here is a bandwidth report (http://screencast.com/t/AS0h2CH1Gypq). The traffic doesn't seem to be that much (http://screencast.com/t/s7hrWNNic1K), but looking at my times the site is going up/down this may be one of the reasons? I have the dvp Nitro package at Media Temple (http://mediatemple.net/webhosting/nitro/). So at this point I would request some help in trying to figure out what the cause of this is, and how I can go about pinpointing this issue. ANY HELP is greatly appreciated.

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  • Moving from http to https - Google webmaster tools | Bing webmaster tools

    - by user2240778
    I'm moving from http to https for my entire site. The site is currently added to google webmaster tools as www.example.com and all the pages are indexed as http. How do i go about moving to the new https URLs on Google webmaster tools. Do I just submit a updated sitemap which has the https URLs OR Do I add a new site as https://www.example.com and submit the sitemap with https urls? All the http urls are set to redirect to their https counterparts.

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  • How can I download the source code for linux-image-3.2.0-24-generic?

    - by keepitsimpleengineer
    The directions at Ubuntu Wiki apt-get source linux-image-$(uname -r) and askubuntu question Where can I find the source code for the Ubuntu Kernel? don't work… sudouser@64bitws:~# uname -r 3.2.0-24-generic and sudouser@64bitws:~# apt-get source linux-image-3.2.0-24-generic Reading package lists... Done Building dependency tree Reading state information... Done Picking 'linux' as source package instead of 'linux-image-3.2.0-24-generic' E: Unable to find a source package for linux

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  • Google I/O 2010 - A beginner's guide to Android

    Google I/O 2010 - A beginner's guide to Android Google I/O 2010 - A beginner's guide to Android Android 101 Reto Meier This session will introduce some of the basic concepts involved in Android development. Starting with an overview of the SDK APIs available to developers, we will work through some simple code examples that explore some of the more common user features including using sensors, maps, and geolocation. For all I/O 2010 sessions, please go to code.google.com From: GoogleDevelopers Views: 5 0 ratings Time: 54:34 More in Science & Technology

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  • How do I get the source code of packages installed through apt-get?

    - by dustyprogrammer
    I am assuming that all application installed through apt-get are open source; but for those that are available in that manner, where can I get the source code for these applications as well as update them? I have a couple applications I use regularly that aren't being actively developed any longer and I would like to add features. Where would I go to get the rights to update these applications? mainly: hellanzb in my case Please and thank you.

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  • Why does mod_security require an ACCEPT HTTP header field?

    - by ripper234
    After some debugging, I found that the core ruleset of mod_security blocks requests that don't have the (optional!) ACCEPT header field. This is what I find in the logs: ModSecurity: Warning. Match of "rx ^OPTIONS$" against "REQUEST_METHOD" required. [file "/etc/apache2/conf.d/modsecurity/modsecurity_crs_21_protocol_anomalies.conf"] [line "41"] [id "960015"] [msg "Request Missing an Accept Header"] [severity "CRITICAL"] [tag "PROTOCOL_VIOLATION/MISSING_HEADER"] [hostname "example.com"] [uri "/"] [unique_id "T4F5@H8AAQEAAFU6aPEAAAAL"] ModSecurity: Access denied with code 400 (phase 2). Match of "rx ^OPTIONS$" against "REQUEST_METHOD" required. [file "/etc/apache2/conf.d/modsecurity/optional_rules/modsecurity_crs_21_protocol_anomalies.conf"] [line "41"] [id "960015"] [msg "Request Missing an Accept Header"] [severity "CRITICAL"] [tag "PROTOCOL_VIOLATION/MISSING_HEADER"] [hostname "example.com"] [uri "/"] [unique_id "T4F5@H8AAQEAAFU6aPEAAAAL"] Why is this header required? I understand that "most" clients send these, but why is their absence considered a security threat?

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  • IIS6 Multiple SSL websites to a single HTTP website?

    - by docflabby
    Running a IIS6 server on Windows 2003. All the websites use ASP.NET I have a number of websites all running separate HTTP websites: www.domain1.com www.domain2.com www.domain3.com I have a separate HTTPS website www.secure.com These websites are all running on the same server. I now wish to intergrate the content of www.secure.com into each of the domains in a transparent way. Such that each website despite having its own SSL connection displays the same website. The complicatrion is www.secure.com needs to know which website the connection has come from to apply the appropriate branding. The idea behind this is to have only one website, and location, but it keeps the core website brand. https://domain1.com looks alot better from a marketing point of view (and avoids users getting confused about what our secure website is) SSL www.domain1.com/secure - displays www.secure.com (branded domain1) SSL www.domain2.com/secure - displays www.secure.com (branded domain2) SSL www.domain3.com/secure - displays www.secure.com (branded domain3) How would the best way of achieving this, i'm open to using additional software if necessery. Would a reverse proxy be sutible for this situation?

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  • How can I download the source code for linux-image-3.2.0-*-generic?

    - by keepitsimpleengineer
    The directions at Ubuntu Wiki apt-get source linux-image-$(uname -r) and askubuntu question Where can I find the source code for the Ubuntu Kernel? don't work… sudouser@64bitws:~# uname -r 3.2.0-24-generic and sudouser@64bitws:~# apt-get source linux-image-3.2.0-24-generic Reading package lists... Done Building dependency tree Reading state information... Done Picking 'linux' as source package instead of 'linux-image-3.2.0-24-generic' E: Unable to find a source package for linux

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  • Server 2003 and XP Client; Why are HTTP connections being silently dropped.

    - by Asa Yeamans
    On my network, my edge-router, a windows 2003 r2 server router with all the latest updates, will drop packets, but only under specific circumstances. I have troubleshot and isolated it down to the most simple configuration i can. There is NO NAT involved. Only fully-public IP addresses. No Firewalls are running either, all ahve been disabled. no packet filters on any interfaces anywhere either. I have a single Windows XP virtual machine and my edge-router(the windows 2003 r2 server, and also a virtual machine) running on a windows 2008 x64 r2 system (running virtual server 2005 as i dont have Intel-VT compatible chip yet). The edge router can access any external http site just fine, no issues. However the windows XP machine is only able to access certain sites. These work: www.google.com www.txstate.edu www.workintexas.com www.thedailywtf.com . These Dont: www.yahoo.com www.utexas.edu en.wikipedia.org slashdot.org www.bing.com. I have removed all possibility of DNS issues by connecting with net-cat from the XP box and sending GET /\r\nHost: \r\n\r\n and that connection replicates the issue as well. The network setup: My statically assigned IP block: x.x.x.168/29 DSL Modem -----PPPoE Connection---- x.x.x.169[EdgeRouter] [EdgeRouter]x.x.x.170 -----Virtual Ethernet----- x.x.x.174 [Test2] Test2's Default gateway is x.x.x.170 and test2 can ping any and every valid, accessible, public IP address with no packet loss what-so-ever. If i connect directly over PPPoE from test2 (the XP box) everything works just fine... Im at my wits end, i have NO IDEA whats causing this.

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  • Is this safe? <a href=http://javascript:...>

    - by KajMagnus
    I wonder if href and src attributes on <a> and <img> tags are always safe w.r.t. XSS attacks, if they start with http:// or https://. For example, is it possible to append javascript: ... to the href and src attribute in some manner, to execute code? Disregarding whether or not the destination page is e.g. a pishing site, or the <img src=...> triggers a terribly troublesome HTTP GET request. Background: I'm processing text with markdown, and then I sanitize the resulting HTML (using Google Caja's JsHtmlSanitizer). Some sample code in Google Caja assumes all hrefs and srcs that start with http:// or https:// are safe -- I wonder if it's safe to use that sample code. Kind regards, Kaj-Magnus

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  • Impact of migrating home page from http to https on search results

    - by 2Stroke SEO
    Guys - I've just had to change one of my site's home page to https from http. I had plenty links coming into the http page and was performing well in Google against many of my targeted search phrases. I did a 301 redirect from the http page to transfer the link juice to the https page (and to prevent duplicate content issues), but my search rankings have tanked which indicates no link juice has been transferred. My PR has vanished - which I'd expect - but I'm really surprised that the SERP rankings fell off the face of the earth. Anyone have any ideas how I can recover this. I've waited a couple of months since the changes took effect just in case Google was taking time to check it out.

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  • Impact of migrating home page from HTTP to HTTPS on search results

    - by 2Stroke SEO
    I've had to change one of my site's home page to HTTPS from HTTP. I had plenty of links coming into the HTTP page and was performing well in Google against many of my targeted search phrases. I did a 301 redirect from the HTTP page to transfer the link juice to the HTTPS page (and to prevent duplicate content issues) but my search rankings have tanked which indicates no link juice has been transferred. My PageRank has vanished - which I'd expect - but I'm really surprised that the SERP rankings fell off the face of the earth. Anyone have any ideas how I can recover from this? I've waited a couple of months since the changes took effect just in case Google was taking time to check it out.

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  • Entity Framework 4 Code First and the new() Operator

    - by Eric J.
    I have a rather deep hierarchy of objects that I'm trying to persist with Entity Framework 4, POCO, PI (Persistence Ignorance) and Code First. Suddenly things started working pretty well when it dawned on me to not use the new() operator. As originally written, the objects frequently use new() to create child objects. Instead I'm using my take on the Repository Pattern to create all child objects as needed. For example, given: class Adam { List<Child> children; void AddChildGivenInput(string input) { children.Add(new Child(...)); } } class Child { List<GrandChild> grandchildren; void AddGrandChildGivenInput(string input) { grandchildren.Add(new GrandChild(...)); } } class GrandChild { } ("GivenInput" implies some processing not shown here) I define an AdamRepository like: class AdamRepository { Adam Add() { return objectContext.Create<Adam>(); } Child AddChildGivenInput(Adam adam, string input) { return adam.children.Add(new Child(...)); } GrandChild AddGrandchildGivenInput(Child child, string input) { return child.grandchildren.Add(new GrandChild(...)); } } Now, this works well enough. However, I'm no longer "ignorant" of my persistence mechanism as I have abandoned the new() operator. Additionally, I'm at risk of an anemic domain model since so much logic ends up in the repository rather than in the domain objects. After much adieu, a question: Or rather several questions... Is this pattern required to work with EF 4 Code First? Is there a way to retain use of new() and still work with EF 4 / POCO / Code First? Is there another pattern that would leave logic in the domain object and still work with EF 4 / POCO / Code First? Will this restriction be lifted in later versions of Code First support? Sometimes trying to go the POCO / Persistence Ignorance route feels like swimming upstream, other times it feels like swimming up Niagra Falls.

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  • Why use short-circuit code?

    - by Tim Lytle
    Related Questions: Benefits of using short-circuit evaluation, Why would a language NOT use Short-circuit evaluation?, Can someone explain this line of code please? (Logic & Assignment operators) There are questions about the benefits of a language using short-circuit code, but I'm wondering what are the benefits for a programmer? Is it just that it can make code a little more concise? Or are there performance reasons? I'm not asking about situations where two entities need to be evaluated anyway, for example: if($user->auth() AND $model->valid()){ $model->save(); } To me the reasoning there is clear - since both need to be true, you can skip the more costly model validation if the user can't save the data. This also has a (to me) obvious purpose: if(is_string($userid) AND strlen($userid) > 10){ //do something }; Because it wouldn't be wise to call strlen() with a non-string value. What I'm wondering about is the use of short-circuit code when it doesn't effect any other statements. For example, from the Zend Application default index page: defined('APPLICATION_PATH') || define('APPLICATION_PATH', realpath(dirname(__FILE__) . '/../application')); This could have been: if(!defined('APPLICATION_PATH')){ define('APPLICATION_PATH', realpath(dirname(__FILE__) . '/../application')); } Or even as a single statement: if(!defined('APPLICATION_PATH')) define('APPLICATION_PATH', realpath(dirname(__FILE__) . '/../application')); So why use the short-circuit code? Just for the 'coolness' factor of using logic operators in place of control structures? To consolidate nested if statements? Because it's faster?

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  • HTML table to “graphical text” for code comments

    - by Atif Aziz
    Is there a tool (ideally command-line-based) that can help in converting the source to HTML tables into “graphical text” (think perhaps ASCII art for HTML tables) for use in code comments (like /*…*/), as show below? /* +--------------------------------------------------------------------+ | Network | +--------------------------------------------------------------------+ | 11.05.2010 | ABC | DEF | +------------+-------------+-------------+-------------+-------------+ | | INPUT | OUTPUT | INPUT | OUTPUT | +------------+-------------+-------------+-------------+-------------+ | Value | 366,899,791 | 0 | 213,001 | 2,132,827 | +------------+-------------+-------------+-------------+-------------+ */ Background: A piece of code that reads values from HTML tables can be annotated with comments depicting text-based graphical representations of complex HTML table layouts. Someone maintaining the code later can then find it easier to understand, for example, how a piece of code is slicing and dicing an HTML table or plucking values at certain cell positions.

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  • Code Alignment In SQL SERVER 2005

    - by user294488
    I am using SQL SERVER MANAGEMENT STUDIO. I want to know the shortcuts for easily aligning the T-SQL Queries and codes in a beautiful format for easy readability and understandablility. Please Let me know how to align the code without using any SQL SERVER FORMATTING / ALIGNING Tools. It is Urgent, Waiting for your kind reply at the earliest possible. Please do give your valuable tips to align the same, right now to align the code i mean to make the code right and left aligned i m using the TAB and SPACE BAR key which becomes very difficult when the length of code is increasing.

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  • .Net Library for parsing source code files?

    - by Jörg Battermann
    Does anyone know of a good .NET library that allows me to parse source code files, but not only .NET source code files (like java, perl, ruby, etc)? I need programmatic access to the contents of various source code files (e.g. class/method /parameter names, types, etc.). Has anyone come across something like this? I know within .NET it is reasonably possible and there are some libraries out there, but I need that to be abstracted to more types of programming languages.

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  • How to configure nginx so it works with Express?

    - by Michal Stefanow
    I'm trying to configure nginx so it proxy_pass requests to my node apps. Question on StackOverflow got many upvotes: http://stackoverflow.com/questions/5009324/node-js-nginx-and-now and I'm using config from there. (but since question is about server configuration it is supposed to be on ServerFault) Here is the nginx configuration: server { listen 80; listen [::]:80; root /var/www/services.stefanow.net/public_html; index index.html index.htm; server_name services.stefanow.net; location / { try_files $uri $uri/ =404; } location /test-express { proxy_pass http://127.0.0.1:3002; } location /test-http { proxy_pass http://127.0.0.1:3003; } } Using plain node: var http = require('http'); http.createServer(function (req, res) { res.writeHead(200, {'Content-Type': 'text/plain'}); res.end('Hello World\n'); }).listen(3003, '127.0.0.1'); console.log('Server running at http://127.0.0.1:3003/'); It works! Check: http://services.stefanow.net/test-http Using express: var express = require('express'); var app = express(); // app.get('/', function(req, res) { res.redirect('/index.html'); }); app.get('/index.html', function(req, res) { res.send("blah blah index.html"); }); app.listen(3002, "127.0.0.1"); console.log('Server running at http://127.0.0.1:3002/'); It doesn't work :( See: http://services.stefanow.net/test-express I know that something is going on. a) test-express is NOT running b) text-express is running (and I can confirm it is running via command line while ssh on the server) root@stefanow:~# service nginx restart * Restarting nginx nginx [ OK ] root@stefanow:~# curl localhost:3002 Moved Temporarily. Redirecting to /index.html root@stefanow:~# curl localhost:3002/index.html blah blah index.html I tried setting headers as described here: http://www.nginxtips.com/how-to-setup-nginx-as-proxy-for-nodejs/ (still doesn't work) proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header Host $http_host; proxy_set_header X-NginX-Proxy true; I also tried replacing '127.0.0.1' with 'localhost' and vice versa Please advise. I'm pretty sure I miss some obvious detail and I would like to learn more. Thank you.

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