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• Oracle Solaris 11.1 Blog Post Roundup

  - by Larry Wake

  Here are a few recent posts about the also-recent Oracle Solaris 11.1 release: Title Author What's New in Solaris 11.1? Karoly Vegh New ZFS Encryption features in Solaris 11.1 Darren Moffat Solaris 11.1: Encrypted Immutable Zones on (ZFS) Shared Storage Darren Moffat High Resolution Timeouts Steve Sistare Solaris 11.1: Changes to included FOSS packages Alan Coopersmith Documentation Changes in Solaris 11.1 Alan Coopersmith How to Update to Oracle Solaris 11.1 Usingthe Image Packaging System Peter Dennis svcbundle for easier SMF manifest creation Glynn Foster Controlling server configurations with IPS Bart Smallders You can also see Markus Weber's list of interesting posts about Oracle Solaris 11 from last year, or take a look at my shortcut on how to search for Solaris posts by tag. If that's not enough, don't forget to register for next Wednesday's Oracle Solaris 11.1 and Oracle Solaris Cluster 4.1 webcast with a live Q&A. It's November 7th, at 8 AM PT. The last time we did this, we got almost 300 questions, so for Wednesday, we're making sure we've got lots of engineers with fingers poised over their keyboards, ready for action.

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• Faut-il être bon en math pour être un bon développeur ? Quelle place ont les maths dans votre parcou

  Faut-il être bon en math pour être un bon développeur ? Quelle place ont les maths dans votre métier et votre parcours ? Faut-il être bon en math pour être un bon développeur ? La question mérite d'être posée. Certes, l'informatique est à classer, dans le système universitaire, du coté des sciences "dures", par oppositions aux sciences sociales et humaines. L'enseignement des mathématiques et la rigueur qu'elles amènent paraissent donc indispensable. Pourtant, beaucoup, comme Alan Skorkin - qui vient d'aborder ce sujet sur son blog -, reconnaissent qu'ils n'ont jamais vraiment eu besoin des maths dans leur travail. La position de Alan Skorkin est c...

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• Lenovo B570 doesn't boot after installation

  - by Alan

  I install my Ubuntu 11.10 64 Bits in my Notebook Lenovo B570. (I remove Win 7). I have no problems to install. But at finish, when it start, it wont boot. It search for another boot device (Network, CD/DVD). Maybe it issue is about SCSI Hard Drive. I try in BIOS set compatible mode SCSI/ATA. It try locate another boot (Networks, CD/DVD). I try to enable compatible mode in BIOS SCSI - SATA and reinstall again. "Will ubuntu be the only os on your computer or is there a 2nd os?" A:Yes. I remove Windows 7 and use All disc to Ubuntu.

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• Meaning of offset in pygame Mask.overlap methods

  - by Alan

  I have a situation in which two rectangles collide, and I have to detect how much did they collide so so I can redraw the objects in a way that they are only touching each others edges. It's a situation in which a moving ball should hit a completely unmovable wall and instantly stop moving. Since the ball sometimes moves multiple pixels per screen refresh, it it possible that it enters the wall with more that half its surface when the collision is detected, in which case i want to shift it position back to the point where it only touches the edges of the wall. Here is the conceptual image it: I decided to implement this with masks, and thought that i could supply the masks of both objects (wall and ball) and get the surface (as a square) of their intersection. However, there is also the offset parameter which i don't understand. Here are the docs for the method: Mask.overlap Returns the point of intersection if the masks overlap with the given offset - or None if it does not overlap. Mask.overlap(othermask, offset) -> x,y The overlap tests uses the following offsets (which may be negative): +----+----------.. |A | yoffset | +-+----------.. +--|B |xoffset | | : :

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• High Speed Photographs Capture Pellet Gun Destruction

  - by Jason Fitzpatrick

  What do you get when you combine high speed flash photography, a carefully focused camera, and pellet gun? Gloriously detailed pictures of pellets tearing apart fruit, cans, ceramic gnomes, and more. Alan Sailer has a passion; in his garage studio he photographs all manner of objects–bottles, raspberries, candy, soda cans–at the moment a pellet shot from a pellet gun tears them apart. The results are beautiful and reminescent of early high-speed photos by photography pioneer Edgerton Born. Hit up the link below to check out the collection and read more about his process. Alan Sailer’s High Speed Photographs [via FlavorWire] Make Your Own Windows 8 Start Button with Zero Memory Usage Reader Request: How To Repair Blurry Photos HTG Explains: What Can You Find in an Email Header?

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• Reboot failure after upgrade from 8.04 LTS to 10.04 LTS

  - by Alan Fietz

  I bought our computer from Freegeeks with Ubuntu 8.04 installed. I upgraded from Ubuntu 8.04 to 10.04 on Thursday November 10. I have an ASUS P4P800SE with dual Intel P4@3GHZ. Installation messages were: - Error loading Nautilus config info - Replaced customied /etc/login.defs - Replaced customized /etc/dhcp3/dhclient.conf - 189 packages removed - WARNING: Failed to read mirror file When I rebooted, the usual ASUS screen appeared, then "Loading GRUB" then "starting Up..." then "starting Up..." again then a blank screen (the moniter went dormant). I rebooted, started GRUB and selected: version 10.04.3 LTS kernel 2.6.32-35 generic I got the same results. I rebooted, started GRUB and selected: kernel 2.6.24-29 generic Here's what was displayed: udevd [875]: error getting socket: Invalid argument libudev:udev_monitor_new_from_netlink: error getting socket: Invalid argument Segmentation fault **Gave up waiting for root device** Common problems - Boot args (cat/proc/cmdline) - Check root delay - check root - Missing modules (cat/pro/modules; **Alert! /dev/disk/by_vvid/c59c6361 etc... does not exist. Dropping to a shell.** Then Busybox v1.13.3 started with the following prompt (?) (initramfs) _ But my typing did not appear on the screen. It appears the hard drive cannot be found. Any suggestion on how to remedy this? Thank you.

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• How to restart RoR services after server has been rebooted

  - by Alan DeLonga

  Update I have been searching around to see what services would possibly need to be restarted in my project after reboot. One of them was thinking sphinx, which I finally got to the point where it logs: [Fri Nov 16 19:34:29.820 2012] [29623] accepting connections But I still cant run searchd or searchd --stop because there was no generated sphinx.conf file in the etc/sphinxsearch for more info refer to this open thread on thinking_sphinx after reboot I then turned to looking into restarting unicorn or thin based on some insight I got. The issue is when I check my gems I see one for thin AND unicorn. But when I try to start either one of them they have no file residing in etc/init.d/ where the nginx and sphinxsearch files reside... Would rebooting totally erase the files for an app server like thin or unicorn? We are hosted on Rackspace running ruby 1.9.2p290 rails (3.2.8, 3.2.7, 3.2.0) nginx/1.1.19 notice that there are gems for unicorn and thin but there is no unicorn.rb or thin.rb in my config folder for my app... I am still super lost if any one can give me some insight on some steps to take to figure this out I would really appreciate it. Anything would help, thanks for reading. thin 1.4.1 unicorn 4.3.1 When I run unicorn I get the same issue as referenced here : > /usr/local/bin/unicorn start /usr/local/lib/ruby/gems/1.9.1/gems/unicorn-4.3.1/lib/unicorn/configurator.rb:610:in `parse_rackup_file': rackup file (start) not readable (ArgumentError) from /usr/local/lib/ruby/gems/1.9.1/gems/unicorn-4.3.1/lib/unicorn/configurator.rb:76:in `reload' from /usr/local/lib/ruby/gems/1.9.1/gems/unicorn-4.3.1/lib/unicorn/configurator.rb:67:in `initialize' from /usr/local/lib/ruby/gems/1.9.1/gems/unicorn-4.3.1/lib/unicorn/http_server.rb:104:in `new' from /usr/local/lib/ruby/gems/1.9.1/gems/unicorn-4.3.1/lib/unicorn/http_server.rb:104:in `initialize' from /usr/local/lib/ruby/gems/1.9.1/gems/unicorn-4.3.1/bin/unicorn:121:in `new' from /usr/local/lib/ruby/gems/1.9.1/gems/unicorn-4.3.1/bin/unicorn:121:in `<top (required)>' from /usr/local/bin/unicorn:19:in `load' from /usr/local/bin/unicorn:19:in `<main>' When I run thin it just opens a command line prompt... /usr/local/bin/thin start >> Using rack adapter Other gems: * LOCAL GEMS * actionmailer (3.2.8, 3.2.7, 3.2.0) actionpack (3.2.8, 3.2.7, 3.2.0) activemodel (3.2.8, 3.2.7, 3.2.0) activerecord (3.2.8, 3.2.7, 3.2.0) activeresource (3.2.8, 3.2.7, 3.2.0) activesupport (3.2.8, 3.2.7, 3.2.0) arel (3.0.2) builder (3.0.0) bundler (1.1.5) carmen (1.0.0.beta2) carmen-rails (1.0.0.beta3) cocaine (0.2.1) coffee-rails (3.2.2) coffee-script (2.2.0) coffee-script-source (1.3.3) daemons (1.1.9) erubis (2.7.0) eventmachine (0.12.10) execjs (1.4.0) faraday (0.8.4) faraday_middleware (0.8.8) foursquare2 (1.8.2) geokit (1.6.5) hashie (1.2.0) hike (1.2.1) httparty (0.8.3) httpauth (0.1) i18n (0.6.0) journey (1.0.4) jquery-rails (2.0.2) json (1.7.4, 1.7.3) jwt (0.1.5) kgio (2.7.4) lastfm (1.8.0) libv8 (3.3.10.4 x86_64-linux) mail (2.4.4) mime-types (1.19, 1.18) minitest (1.6.0) multi_json (1.3.6) multi_xml (0.5.1) multipart-post (1.1.5) mysql2 (0.3.11) oauth2 (0.8.0) paperclip (3.1.1) polyglot (0.3.3) rack (1.4.1) rack-cache (1.2) rack-ssl (1.3.2) rack-test (0.6.1) rails (3.2.8, 3.2.7, 3.2.0) railties (3.2.8, 3.2.7, 3.2.0) raindrops (0.10.0, 0.9.0) rake (0.9.2.2, 0.8.7) rdoc (3.12, 2.5.8) riddle (1.5.3) sass (3.2.0, 3.1.19) sass-rails (3.2.5) sprockets (2.1.3) sqlite3 (1.3.6) sqlite3-ruby (1.3.3) therubyracer (0.10.2, 0.10.1) thin (1.4.1) thinking-sphinx (2.0.10) thor (0.16.0, 0.15.4, 0.14.6) tilt (1.3.3) treetop (1.4.10) tzinfo (0.3.33) uglifier (1.2.7, 1.2.4) unicorn (4.3.1) xml-simple (1.1.1) I am working on a project that was built by another group. I made some modifications to a constants file in the config folder (changing some values for arrays that populated some drop down fields), but the app had to be rebooted before those changes would be recognized. The hosting is through Rackspace, we rebooted through the option on their site. I contacted them and checked the status of our server, the port is open and operational. The problem is the app is not running when you go to the address for the site. Then when I put in the ip address of the server it just says "Welcome to Nginx". But in a log files I see: [Thu Nov 15 02:34:37.945 2012] [15916] caught SIGTERM, shutting down [Thu Nov 15 02:34:37.996 2012] [15916] shutdown complete I am not very versed in server side set up. I have also never worked on a Rails project that had to have specific services started before the application will start. Any insight as to how to figure out what services need to be restarted and how to go about restarting them would be greatly appreciated. I feel kind of dead in the water at this point... Thanks, Alan

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• NDC Oslo

  - by Alan Smith

  Originally posted on: http://geekswithblogs.net/asmith/archive/2013/06/14/153136.aspx2013 has been a hectic year for conference presentations so far, NDC in Oslo has been the 6th conference I have attended, and my session there was my 11th conference presentation this year. I have been meaning to make the short trip over from Stockholm to NDC for a few years, and this was the first time I made it. I have heard a lot of great things about the event, and was impressed with the location, the sessions, and most of all the atmosphere around the event boots and during the party on Thursday evening. The session I was delivering was my “Grid Computing with 256 Windows Azure Worker Roles & Kinect” demo, which I have delivered at many events over the past 12 months. The demo went fine. I’m always a little nervous when I try to scale out the application to 256 worker roles, it almost always works well and the application will scale in minutes, but very occasionally there can be a longer delay due to the provisioning process in the Windows Azure data centers. This would not be an issue for many scenarios, but when standing on stage in front of a room full of developers you really want things to run smoothly. A number of people have suggested that I should pre-provision an environment so that it is guaranteed to be there when I run the demo during a session. For me the aim has always been to show the rapid scalability on cloud-based platforms live on stage. Pre-provisioning an environment may make for a more reliable demo but to me that would be cheating, and not half as much fun!

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• How to create portable applications?

  - by alan

  In Ubuntu can you create a portable application and have it work on an os like suse 10.x via USB stick? I'm not sure if this can be done or not, how to do it or if it would be compatible, any advice is greatly welcomed. I need to make a portable version of Stellarium and have it work in Suse 10.x. I haven't been able portable linux versions. I'm pretty sure there can be portable versions of applications since you can run a program like TOR on it.

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• How to Delete/Disable gnome panels. No existing solutions working

  - by Alan Peabody

  I would like to remove gnome panel completely. I spend most of my time in a (tmux) terminal or a browser. Synapse and a small hidden AWN panel fit the rest of my needs. I have tried all recommended solutions including this (found it a few places): How to delete Gnome Panel? However it always comes back at log in. I have tried changing the required components panel to avant-whatever as well as to empty. I have tried setting them both as default (right click set as default). Right now I just have the last panel set to transparent and auto hide, but it still tends to be annoying. What do I need to do to get rid of this damn thing? Clarification: Using gconf-editor, gconftool2, and/or Ubuntu tweak to set /desktop/gnome/session/required_component/panel to avant-window-navigator is not working. The setting stays when I reboot, but the empty gnome panel sticks around.

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• Sweden Azure Group with Michele Laroux Bustamente &amp; Maartin Balliauw Thursday 22nd May

  - by Alan Smith

  Originally posted on: http://geekswithblogs.net/asmith/archive/2014/05/19/156418.aspxSweden Azure Group (SWAG) has the privilege of welcoming Michele Laroux Bustamente and Maartin Balliauw to present sessions at our meeting this Thursday. Michele and Maartin are two of the world’s leading experts in Cloud Computing and Azure, and will be taking time out from their busy schedules to share their ideas with us, and answer any questions. Knowit Stockholm are kindly hosting the event at their offices, and providing food and refreshments. It should be a great evening. You can register for the event here. Azure Q & A - Michele Leroux Bustamante In this interactive Q & A session Michele Leroux Bustamante will be on hand to share her wealth of experience on Azure related issues. If you are new to Azure and wanting some tips to get started, or an experienced developer needing to negotiate the legal and political protocols related to Cloud Computing Michele will have been there, done that, and be willing to share her experiences. This session will be entirely driven by that attendees, so please come prepared with questions. Reducing latency on the web with the Windows Azure CDN – Maarten Balliauw Serving up content on the Internet is something our web sites do daily. But are we doing this in the fastest way possible? How are users in faraway countries experiencing our apps? Why do we have three webservers serving the same content over and over again? In this session, we’ll explore the Windows Azure Content Delivery Network or CDN, a service which makes it easy to serve up blobs, videos and other content from servers close to our users. We’ll explore simple file serving as well as some more advanced, dynamic edge caching scenarios. Michele Leroux Bustamante Michele Leroux Bustamante is CIO at Solliance (solliance.net), cofounder of Snapboard (snapboard.com), and is recognized as a Microsoft Regional Director and MVP. Michele is a thought leader with over 20 years specializing in building scalable and secure end-to-end system design, identity and access management, and cloud computing technologies – for companies of all sizes. In recent years Michele has also helped launch several startup business ventures and has been a mentor to startups in several accelerator programs – providing both technical and business guidance. Michele shares her experiences through presentations and keynotes all over the world, and has been publishing regularly in technology journals. Maarten Balliauw Maarten Balliauw is a Technical Evangelist at JetBrains. His interests are all web: ASP.NET MVC, PHP and Windows Azure. He’s a Microsoft Most Valuable Professional (MVP) for Azure and an ASPInsider. He has published many articles in both PHP and .NET literature such as MSDN magazine and PHP architect. Maarten is a frequent speaker at various national and international events such as MIX (Las Vegas), TechDays, DPC, …

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• Need help with cybersquatting complaint: can a domain name forward AND resolve at same time? [on hold]

  - by Alan

  Probably a silly question for you pros... but for this novice here, I just want to make sure my understanding is correct. Context: I am trying to prove that a domain name owner has been cybersquatting and has never used the domain name in question. There are 4 shots from WayBackMachine over a three-year period that show the domain name resolving to a basic server index page with either no files or a single cgi-bin folder. The domain name owner claims, however, that the domain name was forwarded over the entire time from to another website, and that these captures probably coincided with occasional "outages." It is my understanding that: a) domain name forwarding is binary: if a domain name is forwarded to a valid site, it cannot simultaneously resolve to a valid IP address. Is this correct? b) domain name forwarding is not subject to "outages": servers can have outages, and websites can be down, but the forwarding itself cannot be down, as this is simply a pointer. (Or, the entire registrar where the DNS settings are hosted would have to malfunction. Is this correct? FINALLY, bonus question for pro webmasters: What is the likelihood that the WayBackMachine would capture the domain name on just those occasions when the webmaster disabled forwarding to supposedly work on the new site? Mucho thanks in advance!

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• Repercussions to sharing .bashrc across machines with Dropbox?

  - by Alan Peabody

  I work on a lot of different machines, all running Ubuntu (not always the same version). I have some really basic customizations to my prompt I would like to have available on all machines. I currently use Dropbox and store all my other "dot files" there, such as my .vim/ .vimrc .gitconfig .ackrc. I then just link them to my home folder from my Dropbox folder. Voilà, all machines in sync. I am unsure what the repercussions of doing something like this with my bashrc is. Can any one offer suggestions? Maybe an easy way to load a separate file in the bashrc?

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• Weekly Cloud Roundup 2012-15

  - by Alan Smith

  Filtering the informative, insightful and quirky from the fire hose of cloud-based hype. Irving Wladawsky-Berger provides some great insight into The Complex Transition to the Cloud, sharing his views on the slow adoption of cloud computing in organizations. “…a prediction by the research firm Gartner that while cloud computing will continue to grow at almost 20 percent a year, it will account for less than 5 percent of totally IT spending in 2015.” With a more positive mindset, Balaji Viswanathan highlights 7 Salient Trends and Directions in Cloud Computing that could be shaping the industry over the next few years. Cloud computing also looks to save energy “A small business with 100 users that moved the Microsoft applications to the cloud could cut energy use and carbon emissions by 90%. Large organizations with 10,000 users saw a 30% reduction.” More on that story here. The expansion of Windows Azure has been in the news with the announcement of “East US” and “West US” datacenters; this was covered by Visual Studio Magazine and Mary-Jo, and according to thenextweb.com Microsoft are also building $112 million data center in Wyoming. The cloud price war is still in full swing with Joe Panettieri discussing the pricing of Windows Azure and Office 365 and asking How Low Can It Go?

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• How to Delete/Disable gnome panels. No existing solutions working.

  - by Alan Peabody

  I would like to remove gnome panel completely. I spend most of my time in a (tmux) terminal or a browser. Synapse and a small hidden AWN panel fit the rest of my needs. I have tried all recommended solutions including this (found it a few places): How to delete Gnome Panel? However it always comes back at log in. I have tried changing the required components panel to avant-whatever as well as to empty. I have tried setting them both as default (right click set as default). Right now I just have the last panel set to transparent and auto hide, but it still tends to be annoying. What do I need to do to get rid of this damn thing?

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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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• How to calculate vertext normals for a mesh in Java in OpenGL ES application?

  - by alan mc

  Can some one point me to Java code ( in Java not C or C++) that calculates all the normals for all the vertices of a mesh for OpenGL ES application. I need this for lighting. Lets say I have a cube with following vertices and indices: float vertices[] = { -width, -height, -depth, // 0 width, -height, -depth, // 1 width, height, -depth, // 2 -width, height, -depth, // 3 -width, -height, depth, // 4 width, -height, depth, // 5 width, height, depth, // 6 -width, height, depth // 7 }; short indices[] = { 0, 2, 1, 0, 3, 2, 1,2,6, 6,5,1, 4,5,6, 6,7,4, 2,3,6, 6,3,7, 0,7,3, 0,4,7, 0,1,5, 0,5,4 }; In above specific example how many normals we need ?

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• Is an event loop just a for/while loop with optimized polling?

  - by Alan

  I'm trying to understand what an event loop is. Often the explanation is that in the event loop, you do something until you're notified that an event occurred. You than handle the event and continue doing what you did before. To map the above definition with an example. I have a server which 'listens' in a event loop, and when a socket connection is detected, the data from it gets read and displayed, after which the server goes to the listening it did before. However, this event happening and us getting notified 'just like that' are to much for me to handle. You can say: "It's not 'just like that' you have to register an event listener". But what's an event listener but a function which for some reason isn't returning. Is it in it's own loop, waiting to be notified when an event happens? Should the event listener also register an event listener? Where does it end? Events are a nice abstraction to work with, however just an abstraction. I believe that in the end, polling is unavoidable. Perhaps we are not doing it in our code, but the lower levels (the programming language implementation or the OS) are doing it for us. It basically comes down to the following pseudo code which is running somewhere low enough so it doesn't result in busy waiting: while(True): do stuff check if event has happened (poll) do other stuff This is my understanding of the whole idea, and i would like to hear if this is correct. I am open in accepting that the whole idea is fundamentally wrong, in which case I would like the correct explanation. Best regards

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• Sharing on Github

  - by Alan

  Over the past couple weeks I have gotten a lot of help from StackOverflow users on a project, and rather than keep the finished product to myself I wanted to share it unencumbered by licenses, but don't want there to be so much legwork during installation that users shy away from trying it. I am about to post it to Github and choosing public domain licensing. I would like to to be super simple for users to make use of and just FTP it up and go. That being said, do I need to make sure I remove things like the JQuery file, and other GPL / MIT licensed dependencies that I didn't write but that my code depends on? I haven't removed any copyright notices from the other code and all of it open source, it would just be nice if users could download everything at once while of course not trying to represent that I am the license holder of the dependencies. Inside my files are also some snippets, do those have to be externalized with installation instructions or can it be posted as is? Here is an example, my nav.php file is 115 lines long and I have these at the top: <script type="text/javascript" src="./js/ddaccordion.js"> /*********************************************** * Accordion Content script- (c) Dynamic Drive DHTML code library (www.dynamicdrive.com) * Visit http://www.dynamicDrive.com for hundreds of DHTML scripts * This notice must stay intact for legal use ***********************************************/ </script> <link href="css/admin.css" rel="stylesheet"> <script type="text/javascript"> ddaccordion.init({ headerclass: "submenuheader", //Shared CSS class name of headers group contentclass: "submenu", //Shared CSS class name of contents group revealtype: "click", //Reveal content when user clicks or onmouseover the header? Valid value: "click", "clickgo", or "mouseover" mouseoverdelay: 200, //if revealtype="mouseover", set delay in milliseconds before header expands onMouseover collapseprev: false, //Collapse previous content (so only one open at any time)? true/false defaultexpanded: [], //index of content(s) open by default [index1, index2, etc] [] denotes no content onemustopen: false, //Specify whether at least one header should be open always (so never all headers closed) animatedefault: false, //Should contents open by default be animated into view? persiststate: true, //persist state of opened contents within browser session? toggleclass: ["", ""], //Two CSS classes to be applied to the header when it's collapsed and expanded, respectively ["class1", "class2"] togglehtml: ["suffix", "<img src='./images/plus.gif' class='statusicon' />", "<img src='./images/minus.gif' class='statusicon' />"], //Additional HTML added to the header when it's collapsed and expanded, respectively ["position", "html1", "html2"] (see docs) animatespeed: "fast", //speed of animation: integer in milliseconds (ie: 200), or keywords "fast", "normal", or "slow" oninit:function(headers, expandedindices){ //custom code to run when headers have initalized //do nothing }, onopenclose:function(header, index, state, isuseractivated){ //custom code to run whenever a header is opened or closed //do nothing } }) </script>

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• The Importance of Fully Specifying a Problem

  - by Alan

  I had a customer call this week where we were provided a forced crashdump and asked to determine why the system was hung. Normally when you are looking at a hung system, you will find a lot of threads blocked on various locks, and most likely very little actually running on the system (unless it's threads spinning on busy wait type locks). This vmcore showed none of that. In fact we were seeing hundreds of threads actively on cpu in the second before the dump was forced. This prompted the question back to the customer: What exactly were you seeing that made you believe that the system was hung? It took a few days to get a response, but the response that I got back was that they were not able to ssh into the system and when they tried to login to the console, they got the login prompt, but after typing "root" and hitting return, the console was no longer responsive. This description puts a whole new light on the "hang". You immediately start thinking "name services". Looking at the crashdump, yes the sshds are all in door calls to nscd, and nscd is idle waiting on responses from the network. Looking at the connections I see a lot of connections to the secure ldap port in CLOSE_WAIT, but more interestingly I am seeing a few connections over the non-secure ldap port to a different LDAP server just sitting open. My feeling at this point is that we have an either non-responding LDAP server, or one that is responding slowly, the resolution being to investigate that server. Moral When you log a service ticket for a "system hang", it's great to get the forced crashdump first up, but it's even better to get a description of what you observed to make to believe that the system was hung.

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• Interim Patches for CVE-2011-4313 released through MOS

  - by Alan

  As reported on the article on the Sun Security Blog, interim patches are available for Solaris 8,9 and 10 directly from MOS without the need to log a Service Request. There is also Interim Relief available for Solaris 11, but at this point in time that will still require a Service Request. As seen from running "named -V", these patches implement the same fix as ISC by taking Bind to the version:BIND 9.6-ESV-R5-P1.

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• Meet Windows Azure Sweden &amp; SWAG Sommeravslutning

  - by Alan Smith

  The Meet Windows Azure event last week saw some great announcements about the current and future developments on the Windows Azure platform. Microsoft Sweden will be hosting an event at their offices that will run through these releases and demo some of the new technologies. It will be a great chance to see the new capabilities in action, and chat to Microsoft Evangelists, MVPs and other developers about the future of the platform. This will also be the last Sweden Windows Azure Group (SWAG) meeting before the summer break, so there will be food, drinks, and the chance of some “SWAG”. We will be back in force after the summer, and have a number of great events planned for the rest of the year. We will have a big announcement to make regarding one of these, so be there and get the chance to register! Registration is here.

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• What are the Consequences for using Relative Location Headers?

  - by Alan Storm

  According to the spec, Location headers used in a redirect require a server name HTTP/1.1 301 Moved Permanently ... Location: http://example.com/foo/baz/bar However, in 2012, most web browsers will recognize a relative path and redirect you to the new location using the original server name HTTP/1.1 301 Moved Permanently ... Location: /foo/baz/bar Are there any negative/surprising consequences to using the relative URLs in the Location headers? My particular concern is how Google/search-engines will interpret this, but if there's anything else I'm not thinking about I'd love to hear it.

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• Handling deleted users - separate or same table?

  - by Alan Beats

  The scenario is that I've got an expanding set of users, and as time goes by, users will cancel their accounts which we currently mark as 'deleted' (with a flag) in the same table. If users with the same email address (that's how users log in) wish to create a new account, they can signup again, but a NEW account is created. (We have unique ids for every account, so email addresses can be duplicated amongst live and deleted ones). What I've noticed is that all across our system, in the normal course of things we constantly query the users table checking the user is not deleted, whereas what I'm thinking is that we dont need to do that at all...! [Clarification1: by 'constantly querying', I meant that we have queries which are like: '... FROM users WHERE isdeleted="0" AND ...'. For example, we may need to fetch all users registered for all meetings on a particular date, so in THAT query, we also have FROM users WHERE isdeleted="0" - does this make my point clearer?] (1) continue keeping deleted users in the 'main' users table (2) keep deleted users in a separate table (mostly required for historical book-keeping) What are the pros and cons of either approach?

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• How much effort is involved in moving a WordPress site to a private server? [on hold]

  - by Alan

  I work in tech, but am on the business side. I have a WordPress site that I would like to move to a personal server and associate with a new domain name. I already have a server (actually, a friend is letting me use his) and the domain name. A friend-of-a-friend, who claims to be an IT pro, has agreed to help, but now is asking for what feels like a lot of money for what he says is a pretty time-intensive job. This doesn't sound right to me, so I thought I would ask here: Would it take months or even days to move the content, and why would it have to be moved in stages? The blog currently uses a basic template and has about 1000 posts. How much effort is really involved in moving a WordPress site from one server to another? Can anyone explain the process? Would it just make more sense to point the domain name at the existing WordPress blog, and pay the nominal yearly fee? I appreciate any answers you can provide.

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