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• Any good method for mounting Hadoop HDFS from another system?

  - by Beel

  I want to mount the Cloudera Hadoop as a Linux file system over the LAN. As a setup, I already have the hadoop cluster running on a set of Ubuntu machines. But now I need to be able to use it as a normal file system from a Fedora system over the LAN. I tried FUSe but two things: 1. Cloudera says FUSE loses data (click here for that comment by a Cloudera employee on the official Cloudera support site) 2. I've had no success making it work the way we want As a point of clarification, I am using Hadoop ONLY for the file system, not for its other capabilities.

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• .htaccess folder rewrite

  - by Lisa

  I have 3 URLS all pointing to the same site. www.abc.co.uk www.xyz.com www.123abc.org I have a folder /foo/bar which has lots of sub folders and files in etc. I want to rewrite this to /bar. So if I have www.abc.co.uk/foo/bar/sheep/page.html I want it to redirect to www.abc.co.uk/bar/sheep/page.html. Is this possible. Sometime I may have a URL like www.abc.co.uk/foo/bar/foo/page.html so this would become www.abc.co.uk/bar/foo/page.html. Only the first instance of foo would be rewritten.

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• Basic Google Analytics Click Tracking and/or Overview

  - by Alan Storm

  This is a really basic Google Analytics question. Apologies in advance if it's not appropriate here, but I've had a lot of luck on Stack Overflow and this seems like the best Stack Exchange site for a question like this. I'm trying to understand how Google Analytics goals work, or if they're the right feature to be using for my situation. Most of the documentation I find online refers to the old version of the UI, not the new one. I have a website, let's call is blog.example.com. This website drives traffic to an ecommerce store, let's call that store.example2.com. I want to get reports on which links from blog.example.com are being clicked through leading to store.example2.com. How do you do this in Google analytics? Are goals the right area to be looking? Do I setup the goals on store.example2.com or blog.example.com? Or both? Is there any canonical user guide (free or paid) that covers how this works? I'm a competent programmer, but it's years since I dealt with conversion tracking on any serious level, and we've progressed well beyond my frozen caveman pixel tracking knowledge. Thanks in advance

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• Building View Matrix in Direct3D11

  - by Balls

  Am I doing it right? I converted this. m_ViewMatrix = XMMatrixLookAtLH(XMLoadFloat3(&m_Position), lookAtVector, upVector); to this one. XMVECTOR vz = XMVector3Normalize( lookAtVector - XMLoadFloat3(&m_Position) ); XMVECTOR vx = XMVector3Normalize( XMVector3Cross( upVector, vz ) ); XMVECTOR vy = XMVector3Cross( vz, vx ); m_ViewMatrix.r[0] = vx; m_ViewMatrix.r[1] = vy; m_ViewMatrix.r[2] = vz; m_ViewMatrix.r[3] = XMLoadFloat3(&m_Position); m_ViewMatrix.r[0].m128_f32[3] = 0.0f; m_ViewMatrix.r[1].m128_f32[3] = 0.0f; m_ViewMatrix.r[2].m128_f32[3] = 0.0f; m_ViewMatrix.r[3].m128_f32[3] = 1.0f; m_ViewMatrix = XMMatrixInverse( &XMMatrixDeterminant(m_ViewMatrix), m_ViewMatrix ); Everything looks fine when I run it. Another question is, I saw on this site(http://webglfactory.blogspot.com/2011/06/how-to-create-view-matrix.html) that he subtracted lookat from position in his vector vz. I tried it but gave me wrong view matrix. Can anyone check my code. I'm studying linear algebra right now. Sucks my course doesn't have one. Thank you, Balls

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• Options for PCI-DSS on AWS - file integrity monitoring and intrusion detection

  - by Brill Pappin

  I need to deploy some file integrity monitoring and intrusion detections software on AWS instances. I really wanted to use OSSEC, however it does not work well in an environment where servers can auto deploy and shut down based on load, because it requires server managed keys to be generated. Including the agent in the AMI will not allow monitoring as soon as it comes up because of that. There are many options out there, and several are listed in other posts on this site, however none that I've seen so far deal with the unique problems inherent in AWS or cloud based deployments in general. Can anyone point me at some products, preferably open source, that we might use to cover those portions of PCI DSS that require this software? Has anyone else achieved this on AWS?

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• Jail Linux user to directory for FTP login

  - by Greg

  I'm planning on using vsftpd to act as a secure ftp server, but I am having difficulty controlling the linux users that will be used as ftp logins. The users are required to be "jailed" into a specific directory (and subdirectories) and have full read/write access. Requirements: - User account "admin_ftp" should be jailed to /var/www directory. - Other accounts will be added as needed, for each site... e.g: - User account "picturegallery_ftp" should be jailed to /var/www/picturegallery.com directory. I have tried the following, but to no avail: # Group to store all ftp accounts in. groupadd ftp_accounts # Group for single user, with the same name as the username. groupadd admin_ftp useradd -g admin_ftp -G ftp_accounts admin_ftp chgrp -R ftp_accounts /var/www chmod -R g+w /var/www When I log into FTP using account admin_ftp, I am given the error message: 500 OOPS: cannot change directory:/home/admin_ftp But didn't I specify the home directory? Extra internets for a guide how to do this specifically for vsftpd :)

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• What is the the maximum time for a user to return to Google for the visit to be flagged up as a bounce in GA?

  - by Anonymous

  I know that Google measures bounce rates by how fast a user returns to the results page after clicking-through to a website. Roughly what is the maximum duration of the visit for the user to then return for it to be considered a bounce? i.e. <5 seconds, <30 seconds? I'm mainly interested as it appears a lot of users clicking through my PPC adverts (Adwords) are bouncing, despite my ads having a high quality score and the page's being entirely related to the adverts copy and at as best tied to what I think user's may be searching for from the key phrases I've selected so the high bounce rate (100% on some keywords) seems a bit strange. If a bounce isn't determined by time, but simply whether a user returns to the SERP after visiting my site or not after any amount of time that would make more sense but the average duration of visit for my keywords with a 100% bounce rate in GA is 00:00:00, which suggests a user immediately returned to the SERPs, which again, is odd. Is my GA data being skewed by https or anything like that? Scratching my head here.

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• Using TrueCrypt with File Replication on Windows Server

  - by neildeadman

  We have a few folders that are set to replicate to a DR file server off-site. One of these folders contains a file that is a TrueCrypt volume container. When this file is mounted in TrueCrypt, the file won't replicate (fair enough!). I'm looking at alternatives to improve this situation. One solution I currently have is to have a scheduled task to unmount the volume and then every morning as the volume is needed, have someone mount it. This is a pain slightly because the password is known by a few people (I'm not one and neither are my colleagues who would be performing the mounting operation) so we'd need to continually get them to come over and type it in. The other I had was to have one TrueCrypt container on each server and replicate the contents when they are mounted. I wasn't able to get TrueCrypt to see the mounted volume so I guess this is a no go. Any other solutions I have missed or a fix for the above?

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• How to hold payment in paygate for a while?

  - by Fero

  Hi all, I have a query regarding holding the payment in PAYGATE PAYMENT GATEWAY. Here is the problem in brief. I am doing a website where the payment should be made only a certain members buy the product. For Example if there is an iPhone in my site, then that particular phone must be buy by certain quantities which given by admin. It may be done one by one user or a single user can buy all the quantities at a single time. In this case i need to hold the payment here.Because i don't want to receive the payments until the certain quantities bought. Because if certain quantities were not buy i need to refund the money to their account. We don't like to do this process. That's why we are looking for holding the payment. Is it possible or what is the best way to solve this problem? Please let me know what is you professional opinion? thanks in advance...

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• @CodeStock 2012 Review: Leon Gersing ( @Rubybuddha ) - "You"

  "YOU"Speaker: Leon GersingTwitter: @Rubybuddha Site: http://about.me/leongersing I honestly had no idea what I was getting in to when I sat down in to this session. I basically saw the picture of the speaker and knew that it would be a good session. I was completely wrong; it was the BEST SESSION of CodeStock 2012.  In fact it was so good, I texted another coworker attending the conference to get over and listen to Leon. Leon took on the concept of growth in the software development community. He specifically referred David Hansson in his ability to stick to his beliefs when the development community thought that he was crazy for creating Ruby on Rails. If you do not know this story Ruby on Rails is one of the fastest growing web languages today. In addition, he also touched on the flip side of this argument in that we must be open to others ideas and not discard them so quickly because we all come from differing perspectives and can add value to a project/team/community. This session left me with two very profound concepts/quotes: “In order to learn you must do it badly in front of a crowed and fail.” - @Rubybuddha I can look back on my career so far and say that he is correct; I think I have learned the most after failing, especially when I achieved this failure in front of other. “Experts must be able to fail.” - @Rubybuddha I think we can all learn from our own mistakes but we can also learn from others. When respected experts fail it is a great learning opportunity for the entire team as well as the person who failed. When expert admit mistakes and how they worked through them can be great learning tools for other developers so that they know how to avoid specific scenarios and if they do become stuck in the same issue they will know how to properly work their way out of them.

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• Fix for poor hd playback for 11.04 upwards

  - by mark kirby

  Hi guys ive seen loads of posts on this site about poor 720/1080p playback in recent ubuntu versions I had this problem and fixed it so I thought id share it with everyone.... 1 install mplayer 2 install smplayer frontend {in software center} 3 open smplayer 4 go to "OPTIONS" then "PREFRENCES" then "GENRAL" 5 if you have a nvidia card choose "OUTPUT DRIVER" and select "VDPAU" {for ATI or AMD choose xv (0 - ATI Radeon AVIVO video) I dont know if this will work as my card is nvidia but it should) 6 go to performance on the left hand side and set both local and streaming cache to 99999 (this may also fix dvd playback if you set that cache aswell} 7 check the box for "ALLOW HARD FRAME DROP" and set "LOOP FILTER" to skip only on HD 8 Set the "THREDS FOR DECODING OPTION TO THE NUMBER OF CORES YOUR CPU HAS IF YOU HAVE MORE THAN ONE CPU ADD UP ALL THE CORES FOR BEST PERFORMANCE" 9 Enjoy you HD movies again on ubuntu...... I have a pretty avrage machine heres my spec.... 2x Pentium 4 ht 3 ghz Stock dell power and motherboard GFORCE 310 HDMI 24 inch full HD tv as a monitor so any one with dule core cpu should have no problems getting this to work. hope this helps someone out.

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• A website hosted on the 1.0.0.0/8 subnet, somewhere on the Internet?

  - by Dave Markle

  Background I'm attempting to demonstrate, using a real-world example, of why someone would not want to configure their internal network on the 1.0.0.0/8 subnet. Obviously it's because this is not designated as private address space. As of 2010, ARIN has apparently allocated 1.0.0.0/8 to APNIC (the Asia-Pacific NIC), who seems to have begun assigning addresses in that subnet, though not in 1.1.0.0/16, 1.0.0.0/16, and others (because these addresses are so polluted by bad network configurations all around the Internet). My Question My question is this: I'd like to find a website that responds on this subnet somewhere and use it as a counter-example, demonstrating to a non-technical user its inaccessibility from an internal network configured on 1.0.0.0/8. Other than writing a program to sniff all ~16 million hosts, looking for a response on port 80, does anyone know of a directory I can use, or even better yet, does anyone know of a site that's configured on this subnet? WHOIS seems to be too general of a search for me at this point...

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• Curl authentication

  - by Jack Humphries

  I am trying to download a file with cURL from a password protected directory on my site. It is not working. Instead of the downloading the requested file, it downloads a HTML file that says, "Authentication Required!" I'm not sure what the problem is. I've tried both of these (with the same result). The username and password are correct (and if the link below is used in a web browser, the file downloads successfully). 1) The username and password are included as part of the URL. curl https://username:[email protected]/auth/file.dmg --O /file.dmg; 2) The username and password are included as an option. curl -u username:wordpass.1 https://www.example.com/auth/file.dmg --O /file.dmg;

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• Conditional Directory Index In Htaccess

  - by icelizard

  This relates to the question in: http://stackoverflow.com/questions/1599717/conditional-directoryindex-in-htaccess The answer states that the following should work: SetEnvIf Remote_Addr ^127\.0\.0\.0$ owner <IfDefine owner> DirectoryIndex index.html </IfDefine> <IfDefine !owner> DirectoryIndex index.php </IfDefine> I am not sure this works, the setting of the Env var deffinately does, but no matter what IP I visit the site from the DirectoryIndex is always index.php Is there something wrong with the conditional or should I be using something else? Thanks in advance

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• Simple UPDATE query with (sometime) long query times

  - by Eric

  I run a dedicated MySQL server (2 cores, 16GB RAM) serving 100-200 requests per second. It is getting sluggish during peak traffic and I have a hard time optimizing the server. So I'm looking for some ideas now that I have done lots of Innodb fine-tuning with the "TUNING PRIMER" The query that now generates most slow queries is the following (see result from mysqldumpslow): Count: 433 Time=3.40s (1470s) Lock=0.00s (0s) Rows=0.0 (0), UPDATE user_sessions SET tid='S' WHERE idsession='S' I am very surprised to have so many long queries for such a simple query with no locking. Fyi, the table is InnoDB and has 14000 rows. It contains all active sessions on the site with approx 10 UPDATE and SELECT hits per second. Here is its structure: CREATE TABLE `user_sessions` ( `personid` mediumint(9) NOT NULL DEFAULT '0', `ip` varchar(18) COLLATE utf8_unicode_ci NOT NULL, `idsession` varchar(32) COLLATE utf8_unicode_ci NOT NULL, `datum` date NOT NULL DEFAULT '0000-00-00', `tid` time NOT NULL DEFAULT '00:00:00', `status` tinyint(4) NOT NULL DEFAULT '0', KEY `personid` (`personid`), KEY `idsession` (`idsession`), KEY `datum` (`datum`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci Any ideas?

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• 12.04 GPU lockup

  - by soandos

  I was able to install Ubuntu 12.04 using the alternative version of the image, (64 bit) but when I start the system it tells me the GPU locked up, and instead presents a text only screen. I understand that this site is not for bug reports, but at the same time, I know that there are some versions of the installer than have to be compatible with my graphics card (Nvidia GTS 360M). I assumed that the mere fact that the alternative installer ran was an indication that I could get some sort of graphical interface running after the install. Is there some way of getting some type of graphical interface running on my machine? Even better would be is there a way to get the rest of the system running as normal (i.e. GPU up and running)? If an internet connection is required to download driver support or something similar, directions for how to configure a wireless connection with WPA2-Personal protection from the text-only interface (bash). Any help would be appreciated. Note: I was able to find this which tells me that the card is supported. Note 2: In the install software stage of the install, I was unable to install anything (no internet connection) Update: The exact error message is [8.591394] [drm] 0000:01:00.0: GPU Lockup - switching to software fbcon Update 2: If I try to install with the regular version of Ubuntu, the screen goes staticy. This also happens if I install with Wubi (distasteful I know) and then try to use Ubuntu. Update 3: I've tried xforcevesa, nomodeset and xforcevesa nomodeset as my wubi boot options. Update 4: Thanks to jokerdino, I can now connect to the internet, so internet tools would now be a possibility.

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• Firefox 3.6 performance increase tricks.......

  - by metal gear solid

  I use many Add-ons which helps me in Web development so i can't uninstall those addons. and usually I keep open lots of tabs in Firefox. And almost always keep Firefox on on my system. I use default profile only I always keep every addons and firefox itself updated. I found some addons to reduce memory use on Firefox addons site , but user reviews were not good for them still Is there any tested tricks to increase performance and reduce memory use of Firefox 3.6, which really works?

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• IT Journal database

  - by SysPrep2010

  Hello everyone, I just wanted to talk about this. This could help you in your IT career. I have been keeping an IT journal with me at all times. I write down problems and then the solutionss. OMG it has been great. For one site I work at I had an DFS issue and another place I work for had the same issue and it helped me out alot. So Just wanted to talk about it.

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• need help upgrading small business wifi network

  - by Henry Jackson

  Our small business currently has 3 wireless access points around the building, each with their own SSID. Security is done with WEP (ick) and MAC address filtering (double ick). We are trying to reconfigure the setup, with these goals: wifi roaming between the access points user-based authentication that isn't as annoying as MAC address filtering. 1) The entire building is hardwired with ethernet, so I assume it should be easy to set up the routers to act as one big network, but I can't figure out how. Can someone point me in the right direction? The routers are consumer-grade linksys routers, is it possible to do this without getting new hardware? 2) For security, we will probably upgrade to WPA2, and I'm thinking of using the Enterprise version so that users can log in with a username, instead of having a single key (so if an employee leaves or something, their access can be removed). We have several on-site Windows servers, can one of them be set up as a RADIUS server, or is that best left to a dedicated machine (again, using existing hardware is good).

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• Check availability of my websites

  - by DeChinees

  Hi, How can I check the availability of websites from hosted by company? Ping the server and checking if the services for IIS or Apache/Tomcat is not enough. I want to see if the sites are responsive, if I can login. My idea is to build a script using cURL to access the websites and parse for certain words. However using cURL to access a secure site (HTTPS://www.fleetagent.be) doesnt seem to work. cURL might not be the best tool! Any ideas how to check the availability of this website? Thanks in advance, Darrell

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• Rails time stamps on images in CSS

  - by brad

  Just posted this on Stack but realized it may be more appropriate here: So Rails time stamping is great. I'm using it to add expires headers to all files that end in the 10 digit timestamp. Most of my images however are referenced in my CSS. Has anyone come across any method that allows for timestamps to be added to CSS referenced images, or some funky re-write rule that achieves this? I'd love for ALL images in my site, both inline and in css to have this timestamp so I can tell the browser to cache them, but refresh any time the file itself changes. I couldn't find anything on the net regarding this and I can't believe this isn't a more frequently discussed topic. I don't think my setup will matter because the actual expiring will hopefully happen the same way, based on the 10 digit timestamp, but I'm using apache to serve all static content if that matters

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• Bandwidth monitor for apache websites

  - by bmaynard

  I am after a web application that will parse apache log files and record how much bandwidth the user has used. We have several virtual hosts that have custom log files and the I/O is recorded at the end of the logfile. However I can't find an application that will parse multiple log files and display a summary for each site. I believe awstats can do this but I want to be able to see all of my clients in one list. If there is something that integrates into cacti then that would be perfect.

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• What's the shortest way to post a cropped screenshot on the web?

  - by Borek

  If I want to send someone a piece of my screen this is what I currently do: PrtScr or Alt+PrtScr Open Paint.NET Paste the screen shot Make a selection Crop image to selection Save image to some location - and remember it! Go to some image hosting site (there are plenty of them in the days of Twitter) Click their "Browse" button Browse for the image if I happened to remember the location where I stored it :) Upload the image and obtain the link which I can share This is simply too many steps. I don't usually mind doing steps 1 to 5 but especially steps 6 and 9 are annoying. Jing is pretty close to what I'm looking for but I find their horrible URLs unbearable. If there was something with similar functionality but better or pluggable hosting, that would be great.

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• JavaOne Latin America Sessions

  - by Tori Wieldt

  The stars of Java are gathering in São Paulo next week. Here are just a few of the outstanding sessions you can attend at JavaOne Latin America: “Designing Java EE Applications in the Age of CDI” Michel Graciano, Michael Santos “Don’t Get Hacked! Tips and Tricks for Securing Your Java EE Web Application” Fabiane Nardon, Fernando Babadopulos “Java and Security Programming” Juan Carlos Herrera “Java Craftsmanship: Lessons Learned on How to Produce Truly Beautiful Java Code” Edson Yanaga “Internet of Things with Real Things: Java + Things – API + Raspberry PI + Toys!” Vinicius Senger “OAuth 101: How to Protect Your Resources in a Web-Connected Environment” Mauricio Leal “Approaching Pure REST in Java: HATEOAS and HTTP Tuning” Eder Ignatowicz “Open Data in Politics: Using Java to Follow Your Candidate” Bruno Gualda, Thiago Galbiatti Vespa "Java EE 7 Platform: More Productivity and Integrated HTML" Arun Gupta  Go to the JavaOne site for a complete list of sessions. JavaOne Latin America will in São Paulo, 4-6 December 2012 at the Transamerica Expo Center. Register by 3 December and Save R$ 300,00! Para mais informações ou inscrição ligue para (11) 2875-4163. 

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• Need help connecting to SRW2024 Linksys Switch from CentOS 5.4

  - by sxanness

  I am configured a Linksys SRW2024, I accidently changed the management VLAN before changing the VLAN configuration thus I can no longer access it with the net. The only way I have read to get into it now is via a console cable, my laptop with me is a MacBook Pro with no Serial port connection, apart from driving around a town that I am unfamilar with to find an adapter I thought I would try on a Linux box. I have a CentOS 5.4 server here (PowerEdge R300) that I am trying to use to talk to the switch. I tried minicom first but I do not see the console. Another site suggested the screen command. I tried "screen /dev/ttyS0 38400" but all I get is blinking curser, I do not see the configuration. I don't know if anyone here as any tips but I hope someone does. Thank You,

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