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• What's the difference between MariaDB and MySQL?

  - by Chris J. Lee

  What's the difference between MariaDB and MySQL? I'm not very familiar with both. I'm primarily a front end developer for the most part. Are they syntactically similar? Where do these two query languages differ? Wikipedia only mentions the difference between licensing: MariaDB is a community-developed branch of the MySQL database, the impetus being the community maintenance of its free status under GPL, as opposed to any uncertainty of MySQL license status under its current ownership by Oracle.

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• Recommendations for managing DNS issues when hosting customer sites.

  - by Thomas

  I'm working at a company which primarily provides SaaS products but also will host some of our customers corporate websites. My question relates to recommendations for managing DNS for client's domain names. My objectives: Not restrict my ability to change the server's IP address such as might happen when I move my servers to a new host. Not have to contact the customer to change their domain's DNS if I need to change the server's IP address. Often times, customers lose this information or have to track down the one person with any knowledge of the domain settings. Map both .clientdomain.com and www.clientdomain.com to the proper IIS site. However, I'm running into a couple of common problems: Sometimes, the DNS console provided by the client's hosting company does not allow for CNAME records. Sometimes, the DNS console provided by the client's hosting company will not let me create a CNAME entry for .spiffydomain.com because the given hosting company has created a SOA record for that entry or simply requires that .spiffydomain.com be an A record. I believe one solution to #2 is to use a wildcard for a CNAME entry (i.e. *.spiffydomain.com). Is that correct? How do other folks that are hosting many customer's site manage change of DNS entries on their servers?

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• Instead of alter table column to turn IDENTITY on and off, turn IDENTITY_INSERT on and off

  - by Kevin Shyr

  First of all, I don't know which version of SQL this post (http://www.techonthenet.com/sql/tables/alter_table.php) is based on, but at least for Microsoft SQL Server 2008, the syntax is not: ALTER TABLE [table_name] MODIFY [column_name] [data_type] NOT NULL; Instead, it should be: ALTER TABLE [table_name] ALTER COLUMN [column_name] [data_type] NOT NULL;   Then, as several posts point out, you can't use T-SQL to run an existing column into an IDENTITY column.  Instead, use the IDENTITY_INSERT to copy data from other tables.  http://msdn.microsoft.com/en-us/library/ms188059.aspx SET IDENTITY_INSERT [table_name] ON INSERT .... SET IDENTITY_INSERT [table_name] OFF     http://www.sqlservercentral.com/Forums/Topic126147-8-1.aspx http://www.sqlteam.com/forums/topic.asp?TOPIC_ID=65257

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• Recovery from URL structure change?

  - by Dejan Pelzel

  in July this year, we have changed the URL structure of the website from: Post: domain.com/blog/post/986/dance/heart-beats-dance-video-by-chinatsu/ Category: domain.com/blog/index/cosplay/ to Post: domain.com/dance/heart-beats-dance-video-by-chinatsu-986/ Category: domain.com/cosplay/ Everything was (supposedly) properly redirected with 301 redirects and it first seemed that the traffic returned after a couple of days, but it has now been close to 2 months and things keep going worse although Google is slowly indexing the changes. What is worrying me even more is that the Pages crawled per day from Webmaster Tools started drastically dropping a few days ago and has just reached a new low in months (from over 2000 to 700). Should I be worried or will things sort out eventually?

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• Can I use my computer as an A2DP receiver?

  - by Pierre-Yves Gillier

  First, the problem: I'm using a Cowon MP3 player as my main music player with basic earplugs. It offers A2DP & I'd like to have my netbook (running UNE 10.04) act as receiver. Some resources on the web about a2dp, but most are out of date: http://fosswire.com/post/2008/10/better-bluetooth-audio/ http://jprvita.wordpress.com/2009/12/15/1-2-3-4-a2dp-stream/ http://dpillay.wordpress.com/2010/09/27/ubuntu-10-04-a2dp-awesome-headset-music/

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• Different methods of ammo resupply

  - by Chris Mantle

  I'm writing a small game at the moment. Presently, I have one or two design elements that aren't locked down yet, and I wanted to ask for input on one of these. For dramatic effect, the player's character in my game is immobilised, alone and has a supposedly limited amount of ammo for their weapons. However, I would like to periodically resupply the player with ammo (for the purpose of balancing the level of difficulty and to allow the player to continue if they're doing well). I'm trying to think of a method of resupply that's different to the more familiar strategies of making ammo magically appear or having the antagonists drop some when they die. I'd like to emphasise the notion of the player's isolation as much as possible, and finding a way of 'sneaking' ammo to the player without removing too much of that emphasis is basically what I'm trying to think of (it's definitely a valid argument that resupplying the player removes it anyway) I have considered a sort of simple in-game 'store', where kills get you points that you can spend on ammo for your favourite weapon. This might work well, and may also be good for supporting a simple micro-transaction business model within the game. However, you'd have to pause the game often to make purchases, which would interrupt the action, and it works against the notion of isolation. Any thoughts?

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• How To Delete, Move, or Rename Locked Files in Windows

  - by Chris Hoffman

  Windows won’t allow you to modify files that open programs have locked. if you try to delete a file and see a message that it’s open in a program, you’ll have to unlock the file (or close the program). In some cases, it may not be clear which program has locked a file – or a background process may have locked a file and not terminated correctly. You must unlock the stubborn file or folder to modify it. Note: Unlocking certain files and deleting them may cause problems with open programs. Don’t unlock and delete files that should remain locked, including Windows system files. How To Delete, Move, or Rename Locked Files in Windows HTG Explains: Why Screen Savers Are No Longer Necessary 6 Ways Windows 8 Is More Secure Than Windows 7

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• How to price code reviews to encourage good behavior?

  - by Chris Clark

  I work for a company that has a hosted .net internet application with many clients. Those clients often want to write customizations for our application. We have APIs to hook into the app, but the customizations themselves are written in .net. This is a shared, secure hosting environment and we have to code review these customizations before we can deploy them in our datacenter to ensure that they don't degrade performance, crash our servers, or open any security vulnerabilities. We charge for these code reviews. The current pricing model is simply a function of the number of lines of code. I think this is a bad idea for a variety of reasons, but primarily because, if we are interested in verifying that the code works as expected, we should be incentivizing good, readable code, not compaction. I would like to propose a pricing model that incorporates some, or all of the following as inputs: Lines of code Cyclomatic complexity Avg function length # of functions Are there any other metrics I should incorporate, or other ideas for how we can reasonably create pricing for code reviews that encourages safe and understandable code?

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• Wireless internet connection connects but internet does not work (no packets received). Wired does.

  - by Rodney

  When I connect my PC via ethernet cable to my ADSL router it works fine. When I connect via Wireless it connects and the internet will work for a random amount of time and then stop working. It stays connected with a strong signal but no packets are received. My laptop/iphone are right next to it and wireless works fine. If I open the Wireless USB status, it says it is connected to my SSID with full strength (54 mps - I am 3 meteres away from my router) and the activty shows as Packets 594 SENT and 105 RECEIVED (this goes up VERY slowly) I have tried the following: Turned off anitvirus and firewall completely. Tested the wifi signal- I am writing this on my laptop which is next to my PC and also has full wifi strength. Tried a different wireless adapter - I dug out an old PCI wireless card - it does the exact same thing. Compared all wireless settings to my laptop. I can ping google.com and it replies (sometimes with packet loss) When I reboot the PC it will connect for a minute or two (random time) and then just stops again. I tried Firefox, IE etc. no joy I have updated all latest versions (Netgear WG111v2) and drivers Checked Event Log - nothing unusual Ping the router (and even connect as admin for the few minutes when the internet does work) Changed the MTU down to 1200 using DrTCP Checked Device Manager for conflicts - none. I ping the router from the PC (192.168.0.10 - 192.168.0.1) and it replies with 4 packets. BUT, on my router admin page (which I access via http on my laptop wirelessly) - if I ping 192.168.0.10 all packets timeout (pinging my laptop 192.168.0.12 works fine) My router admin page shows the leased IP address for 192.168.0.10 (ie it is definitely talking to the router initially) Now I am out of ideas - please help. I think it is an OS/Software issue as I have tried 2 different wireless adapaters (PCI and USB) with the same result but all other wireless devices work fine around mine). It's not the firewall. It is getting assigned an IP address correctly (my PC gets 192.168.0.10, my laptop is .12) It is assigned by DHCP. As soon as I plug in the ethernet cable it all works fine. Repairing the adapter sometimes helps but it will always stop working after a random time. The wireless adapter always shows as connected with Excellent signal but the internet does not work. I am running Windows XP SP3 and have tried a Netgear WG111v2 USB adapter. Thanks in advance! UPDATE: The internet seems to be working, it is just either sending packets too small or slow to work (some small pages load bits of them very slowly but then hang). XP seems to have a networking diagnostic app - here is the output: Last diagnostic run time: 08/30/10 08:16:38 IP Configuration Diagnostic Invalid IP address info Valid IP address detected: 192.168.0.10 IP Layer Diagnostic Corrupted IP routing table info The default route is valid info The loopback route is valid info The local host route is valid info The local subnet route is valid Invalid ARP cache entries action The ARP cache has been flushed Gateway Diagnostic Gateway info The following proxy configuration is being used by IE: Automatically Detect Settings:Disabled Automatic Configuration Script: Proxy Server: Proxy Bypass list: info This computer has the following default gateway entry(ies): 192.168.0.1 info This computer has the following IP address(es): 192.168.0.10 info The default gateway is in the same subnet as this computer info The default gateway entry is a valid unicast address info The default gateway address was resolved via ARP in 1 try(ies) info The default gateway was reached via ICMP Ping in 1 try(ies) info TCP port 80 on host 65.55.12.249 was successfully reached info The Internet host www.microsoft.com was successfully reached info The default gateway is OK DNS Client Diagnostic DNS - Not a home user scenario info Using Web Proxy: no info Resolving name ok for (www.microsoft.com): yes No DNS servers DNS failure HTTP, HTTPS, FTP Diagnostic HTTP, HTTPS, FTP connectivity info FTP (Passive): Successfully connected to ftp.microsoft.com. info HTTP: Successfully connected to www.microsoft.com. warn HTTPS: Error 12002 connecting to www.microsoft.com: The operation timed out warn HTTPS: Error 12002 connecting to www.passport.net: The operation timed out error Could not make an HTTPS connection. info Redirecting user to support call WinSock Diagnostic WinSock status info All base service provider entries are present in the Winsock catalog. info The Winsock Service provider chains are valid. info Provider entry MSAFD Tcpip [TCP/IP] passed the loopback communication test. info Provider entry MSAFD Tcpip [UDP/IP] passed the loopback communication test. info Provider entry RSVP UDP Service Provider passed the loopback communication test. info Provider entry RSVP TCP Service Provider passed the loopback communication test. info Connectivity is valid for all Winsock service providers. Wireless Diagnostic Wireless - Service disabled Wireless - User SSID action User input required: Specify network name or SSID Wireless - First time setup info The Wireless Network name (SSID) to which the user would like to connect = RodSof Wifi. Wireless - Radio off info Valid IP address detected: 192.168.0.10 Wireless - Out of range Wireless - Hardware issue Wireless - Novice user Wireless - Ad-hoc network Wireless - Less preferred Wireless - 802.1x enabled Wireless - Configuration mismatch Wireless - Low SNR Network Adapter Diagnostic Network location detection info Using home Internet connection Network adapter identification info Network connection: Name=Local Area Connection 2, Device=Realtek RTL8168C(P)/8111C(P) PCI-E Gigabit Ethernet NIC, MediaType=LAN, SubMediaType=LAN info Network connection: Name=Wireless USB, Device=NETGEAR WG111v2 54Mbps Wireless USB 2.0 Adapter, MediaType=LAN, SubMediaType=WIRELESS info Both Ethernet and Wireless connections available, prompting user for selection action User input required: Select network connection info Wireless connection selected Network adapter status info Network connection status: Connected HTTP, HTTPS, FTP Diagnostic HTTP, HTTPS, FTP connectivity info FTP (Active): Successfully connected to ftp.microsoft.com. warn HTTP: Error 12007 connecting to www.microsoft.com: The server name or address could not be resolved warn HTTP: Error 12002 connecting to www.hotmail.com: The operation timed out warn HTTPS: Error 12002 connecting to www.passport.net: The operation timed out warn HTTPS: Error 12002 connecting to www.microsoft.com: The operation timed out error Could not make an HTTP connection. error Could not make an HTTPS connection.

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• Separate php.ini file for each Apache virtual host?

  - by Calvin L

  Is it possible to have a separate php.ini file that overrides the default php.ini file for each virtual host? I'm running Apache/2.2.14, PHP 5.3.2-1. For example I have several vhosts pointing to domains in my /var/www/ directory: /var/www/website1.com /var/www/website2.com What I'd like is to be able to place a custom php.ini file in each directory that would override the default values only for that vhost, but keep the original defaults if the value isn't specified: /var/www/website1.com/htdocs/ /var/www/website1.com/php.ini EDIT: I found more info on the topic here for those interested: http://serverfault.com/questions/34078/how-do-i-set-up-per-site-php-ini-files-on-a-lamp-server-using-namevirtualhosts

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• Immutable Method in Java

  - by Chris Okyen

  In Java, there is the final keyword in lieu of the const keyword in C and C++. In the latter languages there are mutable and immutable methods such as stated in the answer by Johannes Schaub - litb to the question How many and which are the uses of “const” in C++? Use const to tell others methods won't change the logical state of this object. struct SmartPtr { int getCopies() const { return mCopiesMade; } }ptr1; ... int var = ptr.getCopies(); // returns mCopiesMade and is specified that to not modify objects state. How is this performed in Java?

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• Most efficient arc for developing cross-browser support?

  - by Chris Hasbrouck

  I'm curious to hear what approach people take to planning for cross-browser support when developing a website. There are generally two approaches I've seen developers take in their workflow: -optimize for webkit then apply hacks for IE7-9, or -optimize for IE7-8 then apply newer features for IE9/webkit Basically starting at the front of technology and working toward the back, or starting at the back of technology and working toward the front. How do you do things? What advantages or disadvantage do you perceive in the different way of doing things wrt to developing cross-browser support?

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• How do I ban a wifi network in Network Manager?

  - by Chris Conway

  My wifi connection drops sometimes and, for some reason, Network Manager attempts to connect to my neighbor's network, which requires a password that I don't know. The network in question is not listed in the "Edit Connections..." dialog and I can find no reference to it in any configuration file, but still the password dialog pops up every time my main connection drops. Is there a way to blacklist a wireless network so that the Network Manager will never attempt to connect to it? Or, equivalently, how can I remove the configuration data that causes the Network Manager to attempt to connect to this particular network?

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• Recommendations for adjustable sit-stand workstations?

  - by Chris Phillips

  Recently, I've been feeling the discomfort of sitting at my desk all day long. I'm fairly active, stretch, and take regular breaks, but some days it's still pretty uncomfortable to sit all day long, whether in a nice chair or on an exercise ball. I would really like able to stand at my computer for part of the day. My current setup is a large desk with two 26" lcds and a 17" laptop. I don't mind if the laptop isn't adjustable, as I don't use it as regularly as the monitors. I would like to be able to fairly easily switch from a sitting position to a standing position and back again as necessary. I've been looking into adjustable height desks and stands and found that they tend to be either really expensive, or don't quite meet my needs. (For example, the Ergotron WorkFit-S Dual LCD workstation looks like the ideal feature set at a reasonable price, but won't fit with my monitors.) Any suggestions or thoughts? Update: fixed a typo. Thanks @RDL!

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• How to Build Services from Legacy Applications

  - by Chris Falter

  The SOA consultants invaded the executive suite at your company or agency, preached the true religion, and converted the unbelievers. Now by divine imperative you must convert your legacy applications into a suite of reusable services.  But as usual, you lack the time and resources that you need in order to develop the services properly.  So you googled or bing’ed, found this blog post, and began crying in gratitude.  Yes, as the title implies, I am going to reveal my easy, 3-step, works-every-time process for converting silos of legacy applications into the inventory of services your CIO has been dreaming about.  So just close your eyes and count to 3 … now open them … and here it is…. Not. While wishful thinking is too often the coin of the IT realm, even the most naive practitioner knows that converting legacy applications into reusable services requires more than a magic wand.  The reason is simple: if your starting point is your legacy applications, then you will simply be bolting a web service technology layer on top of your legacy API.  And that legacy API is built in the image of the silo applications.  Enter the wide gate of the legacy API, follow the broad path of generating service interfaces from existing code, and you will arrive at the siloed enterprise destruction that you thought you were escaping. The Straight and Narrow Path This past week I had the opportunity to learn how the FBI Criminal Justice Information Systems department has been transitioning from silo applications to a service inventory.  Lafe Hutcheson, IT Specialist in the architecture group and fellow attendee at an SOA Architect Certification Workshop, was my guide.  Lafe has survived the chaos of an SOA initiative, so it is not surprising that he was able to return from a US Army deployment to Kabul, Afghanistan with nary a scratch.  According to Lafe, building their service inventory is a three-phase process: Model a business process.  This requires intense collaboration between the IT and business wings of the organization, of course.  The FBI uses IBM Websphere tools to model the process with BPMN. Identify candidate services to facilitate the business process. Convert the BPMN to an executable BPEL orchestration, model and develop the services, and use a BPEL engine to run the process.  The FBI uses ActiveVOS for orchestration services. The 12 Step Program to End Your Legacy API Addiction Thomas Erl has documented a process for building a web service inventory that is quite similar to the FBI process. Erl’s process adds a technology architecture definition phase, which allows for the technology environment to influence the inventory blueprint.  For example, if you are using an enterprise service bus, you will probably not need to build your own utility services for logging or intermediate routing.  Erl also lists a service-oriented analysis phase that highlights the 12-step process of applying the principles of service orientation to modeling your services.  Erl depicts the modeling of a service inventory as an iterative process: model a business process, define the relevant technology architecture, define the service inventory blueprint, analyze the services, then model another business process, rinse and repeat.  (Astute readers will note that Erl’s diagram, restricted to analysis and modeling process, does not include the implementation phase that concludes the FBI service development methodology.) The service-oriented analysis phase is where you find the 12 steps that will free you from your legacy API addiction. In a nutshell, you identify the steps in the process that need services; identify the different types of services (agnostic entity services, service compositions, and utility services) that are required; apply service-orientation principles; and normalize the inventory into cohesive service models. Rather than discuss each of the 12 steps individually, I will close by simply referring my readers to Erl’s explanation.

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• ASP.NET MVC WebService - Security for Industrial Android Clients

  - by Chris Nevill

  I'm trying to design a system that will allow a bunch of Android devices to securely log into an ASP.NET MVC REST Web service. At present neither side are implemented. However there is an ASP.NET MVC website which the web service will site along side. This is currently using forms authentication. The idea will be that the Android devices will download data from the web service and then be able to work offline storing data in their own local databases, where users will be able to make updates to that data, and then syncing updates back to the main server where possible. The web service will be using HTTPS to prevent calls being intercepted and reduce the risk of calls being intercepted. The system is an industrial system and will not be in used by the general Android population. Instead only authorized Android devices will be authorized by the Web Service to make calls. As such I was thinking of using the Android devices serial number as a username and then a generated long password which the device will be able to pick up - once the device has been authorized server side. The device will also have user logins - but these will not be to log into the web service - just the device itself - since the device and user must be able to work offline. So usernames and passwords will be downloaded and stored on the devices themselves. My question is... what form of security is best setup on the web service? Should it use forms Authentication? Should the username and password just be passed in with each GET/POST call or should it start a session as I have with the website? The Android side causes more confusion. There seems to be a number of options here Spring-Android, Volley, Retrofit, LoopJ, Robo Spice which seems to use the aforementioned Spring, Retrofit or Google HttpClient. I'm struggling to find a simple example which authenticates with a forms based authentication system. Is this because I'm going about this wrong? Is there another option that would better suite this?

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• How to configure cookieless virtual host in Apache2?

  - by xzyfer

  We run over a hundred web applications (growing daily) on a LAMP stack using Apache2 on Ubuntu 10.04. We've would like all requests to static content to be cookieless. We host applications on many different domains, a majority of which as SaSS applications. Many of the domains host instances of the applications on sub domains, ie. myapp.example.com, myapp2.example.com myapp.otherexample.com etc.. At the moment all static content is server relative to the (sub)domain requesting it. As far as I understand the process, I would need to setup a new domain, eg. staticexample.com. In this case is special configuration in the virtual host for this domain required to ensure no cookies are served? Also, would it be possible to instead use static.example.com? In this case what configurations would I need in my virtual host for this subdomain to ensure no cookies are served?

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• How to stop fan running always on Asus P8P76LE motherboard with ATI Radeon HD6900

  - by Chris Good

  I'm using Ubuntu 12.04 LTS. I'm not sure if it is the CPU (i7) fan or the video card fan. I've tried using lm-sensors & fancontrol sudo sensors-detect Now follows a summary of the probes I have just done. Just press ENTER to continue: Driver `w83627ehf': * ISA bus, address 0x290 Chip `Nuvoton NCT6776F Super IO Sensors' (confidence: 9) Driver `coretemp': * Chip `Intel digital thermal sensor' (confidence: 9) To load everything that is needed, add this to /etc/modules: # Chip drivers coretemp w83627ehf Like many people, I'm also getting error: /usr/sbin/pwmconfig: There are no pwm-capable sensor modules installed Here is the output of sensors: # sensors radeon-pci-0100 Adapter: PCI adapter temp1: +71.0°C coretemp-isa-0000 Adapter: ISA adapter Physical id 0: +44.0°C (high = +80.0°C, crit = +98.0°C) Core 0: +44.0°C (high = +80.0°C, crit = +98.0°C) Core 1: +40.0°C (high = +80.0°C, crit = +98.0°C) Core 2: +43.0°C (high = +80.0°C, crit = +98.0°C) Core 3: +42.0°C (high = +80.0°C, crit = +98.0°C) I'm hoping some-one has already solved this for my configuration because this seems to be a problem for many people and there are many different suggestions.

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• apt-get upgrade gives "403 forbidden" error

  - by 3l4ng

  I'm running Ubuntu 13.04 64b. sudo apt-get update works fine, but when I run sudo apt-get upgrade I get these errors: Err http://archive.ubuntu.com/ubuntu/ raring-updates/main python3.3-minimal amd64 3.3.1-1ubuntu5.2 403 Forbidden Err http://ppa.launchpad.net/otto-kesselgulasch/gimp/ubuntu/ raring/main gimp amd64 2.8.6-0raring1~ppa 403 Forbidden Err http://archive.ubuntu.com/ubuntu/ raring-security/main python3.3-minimal amd64 3.3.1-1ubuntu5.2 403 Forbidden Err http://ppa.launchpad.net/otto-kesselgulasch/gimp/ubuntu/ raring/main gimp-help-en all 1:2.8-0raring16~ppa 403 Forbidden Failed to fetch http://archive.ubuntu.com/ubuntu/pool/main/p/python3.3/python3.3-minimal_3.3.1-1ubuntu5.2_amd64.deb 403 Forbidden Failed to fetch http://ppa.launchpad.net/otto-kesselgulasch/gimp/ubuntu/pool/main/g/gimp/gimp_2.8.6-0raring1~ppa_amd64.deb 403 Forbidden Failed to fetch http://ppa.launchpad.net/otto-kesselgulasch/gimp/ubuntu/pool/main/g/gimp-help/gimp-help-en_2.8-0raring16~ppa_all.deb 403 Forbidden E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing? Running sudo apt-get upgrade --fix-missing installs some updates, but the above errors still persist when I run apt-get upgrade again. The software update app shows the error: https://www.dropbox.com/s/2cr450557hmahzz/software_update.jpg and selecting continue shows: https://www.dropbox.com/s/l7u32sxyfbxxeeg/soft_upd2.jpg (sorry for the links, I don't have enough rep to post images) I am behind a proxy, but apt-get update and web browsing work without issues. I also do not believe a server being down is causing this, as the problem has been there over a month. Any ideas on how to fix this?

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• Computing a normal matrix in conjunction with gluLookAt

  - by Chris Smith

  I have a hand-rolled camera class that converts yaw, pitch, and roll angles into a forward, side, and up vector suitable for calling gluLookAt. Using this camera class I can modify the model-view matrix to move about the 3D world just fine. However, I am having trouble when using this camera class (and associated model-view matrix) when trying to perform directional lighting in my vertex shader. The problem is that the light direction, (0, 1, 0) for example, is relative to where the 'camera is looking' and not the actual world coordinates. (Or is this eye coordinates vs. model coordinates?) I would like the light direction to be unaffected by the camera's viewing direction. For example, when the camera is looking down the Z axis the ground is lit correctly. However, if I point the camera straight at the ground, then it goes dark. This is (I think) because the light direction is parallel with the camera's 'up' vector which is perpendicular with the ground's normal vector. I tried computing the normal matrix without taking the camera's model view into account, but then none of my objects were rotated correctly. Sorry if this sounds vague. I suspect there is a straight forward answer, but I'm not 100% clear on how the normal matrix should be used for transforming vertex normals in my vertex shader. For reference, here is pseudo code for my rendering loop: pMatrix = new Matrix(); pMatrix = makePerspective(...) mvMatrix = new Matrix() camera.apply(mvMatrix); // Calls gluLookAt // Move the object into position. mvMatrix.translatev(position); mvMatrix.rotatef(rotation.x, 1, 0, 0); mvMatrix.rotatef(rotation.y, 0, 1, 0); mvMatrix.rotatef(rotation.z, 0, 0, 1); var nMatrix = new Matrix(); nMatrix.set(mvMatrix.get().getInverse().getTranspose()); // Set vertex shader uniforms. gl.uniformMatrix4fv(shaderProgram.pMatrixUniform, false, new Float32Array(pMatrix.getFlattened())); gl.uniformMatrix4fv(shaderProgram.mvMatrixUniform, false, new Float32Array(mvMatrix.getFlattened())); gl.uniformMatrix4fv(shaderProgram.nMatrixUniform, false, new Float32Array(nMatrix.getFlattened())); // ... gl.drawElements(gl.TRIANGLES, this.vertexIndexBuffer.numItems, gl.UNSIGNED_SHORT, 0); And the corresponding vertex shader: // Attributes attribute vec3 aVertexPosition; attribute vec4 aVertexColor; attribute vec3 aVertexNormal; // Uniforms uniform mat4 uMVMatrix; uniform mat4 uNMatrix; uniform mat4 uPMatrix; // Varyings varying vec4 vColor; // Constants const vec3 LIGHT_DIRECTION = vec3(0, 1, 0); // Opposite direction of photons. const vec4 AMBIENT_COLOR = vec4 (0.2, 0.2, 0.2, 1.0); float ComputeLighting() { vec4 transformedNormal = vec4(aVertexNormal.xyz, 1.0); transformedNormal = uNMatrix * transformedNormal; float base = dot(normalize(transformedNormal.xyz), normalize(LIGHT_DIRECTION)); return max(base, 0.0); } void main(void) { gl_Position = uPMatrix * uMVMatrix * vec4(aVertexPosition, 1.0); float lightWeight = ComputeLighting(); vColor = vec4(aVertexColor.xyz * lightWeight, 1.0) + AMBIENT_COLOR; } Note that I am using WebGL, so if the anser is use glFixThisProblem(...) any pointers on how to re-implement that on WebGL if missing would be appreciated.

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• How to Install the MATE Desktop & Go Back to GNOME 2 on Ubuntu

  - by Chris Hoffman

  If you long for the days of GNOME 2 and just can’t get along with Unity or GNOME 3, MATE is here to save you. It’s an actively developed fork of GNOME 2, and it’s easily installable on Ubuntu. MATE isn’t available in Ubuntu’s repositories, but the MATE developers offer an official repository for Ubuntu. Unlike some methods that recommend you use Linux Mint’s repository on Ubuntu, this won’t mess up your system. How to Own Your Own Website (Even If You Can’t Build One) Pt 1 What’s the Difference Between Sleep and Hibernate in Windows? Screenshot Tour: XBMC 11 Eden Rocks Improved iOS Support, AirPlay, and Even a Custom XBMC OS

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• Summary of the Solaris 11 webcast's livechat QnA session

  - by Karoly Vegh

  This is a followup post to the previous summary on the "What's new with Solaris 11 since the launch" webcast. That webcast has had a chatroom for a live Questions and Answers session running. I went through the archive of those and compiled a list of some of the (IMHO) most relevant and most frequently asked questions, I'd like to share. This is the first part, covering the QnA of Session I and II of the webcast, in a followup post we can have a look of the rest of the sessions if required - let me know in the comments. Also, should you have questions, as usual, feel free to ask those there, too.  ...and here come the answered questions:  When will Exadata be based on Solaris in place of Oracle Enterprise Linux?Exadata offers both Solaris 11 or Oracle Enterprise Linux.  The choice can be made at deployment time based on your OS needs.What are all other benefits and futures avilable in solaris 11 (cloud O.S.) compared to cloud based Red Hat Linux and Windows?suggest you check out our cloud white paper for a view of this. Also the OTN Solaris 11 page has some good articles. Here are the links:  http://www.oracle.com/technetwork/server-storage/solaris11/documentation/o11-106-sol11-cloud-501066.pdf http://www.oracle.com/technetwork/server-storage/solaris11/overview/index.htmlWill 11.1 have a more complete IPS respository for Oracle and FOSS software?Yes, we are adding additional packages to the various package repositories. Since Solaris 11 was launched, both the Oracle Solaris Studio tools as well as Oracle Solaris Cluster have been made available along with numerous new FOSS packages. We will continue to be adding additional Oracle products and open source packages in the future. Will Exadata be based on Sparc in place of intel-amd x86 in next future ?We can't publically discuss futures, but we actually have a SPARC version of Exadata today, it's called SuperCluster, this is such a powerfull multipurpose system that it actually have multiple personalities built into one system: Exadata, Exalogic, and it can be a general purpose platform if you want. Have I understood this right? Livepatching KSplice-style is coming to Solaris 11 too?We're looking at that for certain types of Solaris patches in the future.Will there be a security framework like SST/JASS for Solaris 11?We can't talk about the future projects on a public forum, but we recognize the need for SST/JASS and want to address this as soon as possible. On the other side there are a whole bunch of "best practices" that are now embedded into Solaris 11 by default, so out of the box Solaris 11 should already address part of what SST/JASS gave you. (For example we did a lot of work on improving the auditing performance so that we can now have it turned on by default). On x86 can install VirtualBox in a Zone and use that to host other OSes.Yes, this was one of the first things we made sure would work when we acquired VirtualBox when we were still Sun Microsystems. If I have a Solaris 11 Control Domain on a T-series, can I run a Solaris 10 Ldom with Solaris 8 branded containers?Yes, you can.Is Oracle Solaris free or do we need to purchase?Solaris is free, the entitlement to run it comes either with a Sun system (new or historical) or for 3rd party systems the entitlement comes with a support contract. Note that for production use you will be expected to get a support contract. If you don't want to use the Solaris system (Sun or 3rd party) for production use (i.e. development) you can get an OTN license on the Oracle Technical Network website. Will encryption and deduplication both work on a share?This should work at the same time. What approaches does Solaris use to monitor usage?There are many different tools in Solaris to monitor usage. The main ones are the "stats" (vmstat, mpstat, prstat, ...), the kstat interface, and DTrace (to get details you couldn't see before). And then there are layered tools that can interface with these tools (Ops Center, BMC, CA, Tivoli, ...) Apart little-endian, big-endian how is it easy to port Solaris applications on Sparc to x86 and vice-versa ?Very easy. Except for certain hardware specific applications (those that utilize hardware specific drivers), all of the same Oracle Solaris APIs exist for all architectures. Is IPS based patching aware of the fact that zones can reside on ZFS and move from one physical server to another ?IPS is definitely aware of zones and uses ZFS to support boot environments for non-global zones in the same way that's used for the global zone. With respect to moving a zone from one physical server to another, Solaris 11 supports to the same zone attach/deattach method that was introduced in Solaris 10. Is vnic support in Ldoms planned?This is currently being investigated for a future LDOM release. Is it possible with the new patching system to build a system later with the same patch level as a system built a few months earlier?Yes, you can choose/define exactly which version should go to the system and it will always put the same bits in place. The technical answer is that you choose the version of the "entire" package you want on the system and the rest flows from there. Is it in the plans to allow zones to add/remove zpools to running zones dynamically in future updates?Work in this area is currently under investigation. Any plans to realese Solaris 11 source code? i.e. opensolaris?We currently can't comment on publicly releasing the source code. If you need/want this access please let your Oracle account team know. What about VirtualBox and Solaris11 for virtualization?Solaris 11 works great with VirtualBox, as both a client and a host system. Will Oracle DB software eventually be supplied as IPS packages? When?We don't have a date yet but this is actively being worked on. What are the new artifacts in Oracle Solaris 11 than the previous versions?There are quite a few actually. The best start is to look at our "Evaluate Solaris 11" page, and there you also can find a Transition Guide. http://www.oracle.com/technetwork/server-storage/solaris11/overview/evaluate-1530234.html So, this seems just like RedHat's YUM environment?IPS offers certain features beyond those in YUM or other packaging systems. For example, IPS works with ZFS and Solaris Boot Environments to provide a safe environment for software lifecycle management so that changes can be reverted by switching to an older boot environment. With Zones on solaris 11, can I do paravirtualitation?The great thing about zones is you don't *need* paravirtualization. You're making the same direct kernel calls that you would outside of a zone.  It's an incredibly significant performance win over hypervisor-based virtualization. Are zones/containers officially supported to run Oracle Databases?  EBIZ?Hi Calvin, the answer is yes, here is the support matrix for DB:  http://www.oracle.com/technetwork/database/virtualizationmatrix-172995.html I've found some nasty bugs in Solaris 11 (one of which today) that have been fixed in community forks (i.e., Illumos). Will Oracle ever restart collaboration with the community?We continue to work with the community, just not as open on all projects as we did before (For example IPS is an open project) and the source of more than half of the Solaris packages is posted on our opensource websites. I can't comment on what we will do in the future. And with regards to bugs please file them through the support organization and we will get them resolved. Is zpool vdev removal on-the fly now possible ?This issue is actively being investigated although we don't have a date for when this feature will be available. Is pgstat now the official replacement for corestat ?It's intended to provide similar functionality Where are the opensource website?For Oracle Solaris, visit http://www.oracle.com/technetwork/opensource/systems-solaris-1562786.html As a cloud-scale virtualization, is it going to be easier to move zones between machines? maybe even automatic in case of a hardware failure?Hi Gashaw, we already have customers that have implemented what they refer to as "flying zones" that they can move around very easily. They use Solaris Cluster to do this. What about VMware vMotion like feature?We have secure live migration with both Logical Domains on SPARC T series systems, and with Oracle VM on x86 systems. When running Solaris 10/11 on an enterprise server with a lot of zones, what are best practises commands to show the system is running fine? (has enough hardware resources). For example CPU / Memory / I/O / system load. What are the recommended values?For Solaris 11, look into the new zonestat(1M) command that provides a great deal of information about zone utilization. In addition, there is new work underway in providing additional observability in areas such as per-zone file system I/O. Java optimizations done with Solaris 11? For X86 platforms too? Where can I find more detail about this?There is lots of work that go into optimizing Java for Oracle Solaris 10 & 11 on both SPARC and x86. See http://www.oracle.com/technetwork/articles/servers-storage-dev/solarisforjavadevelop-168642.pdf What is meant by "ZFS Shadow Migration"?It's a way to migrate data from another file system to ZFS: http://docs.oracle.com/cd/E23824_01/html/E24456/filesystem-3.html Is flash archive available with S11?Flash archive is not.  There is a procedure for disaster recovery, and we're working on a modern archive-based deployment tool for a future update.  The disaster recovery tool is here: http://www.oracle.com/technetwork/articles/servers-storage-admin/o11-091-sol-dis-recovery-489183.html  You can also use Distribution Constructor to build common golden images. Will solaris 11 be available on the ODA soon?The idea's under evaluation -- we'll share your interest with the team. What steps can be taken to ensure that breaches of security are identified quickly?There are a number of tools, including the "bart" tool and "pkg verify" to ensure that software has not been compromised.  Solaris Audit can also be used to detect unauthorized access.  You can also use Immutable Zones to protect against compromise.  There are a wide variety of security tools, and I've covered only a few. What is the relation from solaris to java 7 speed optimization?There is constant work done between the Oracle Solaris and Java teams on performance optimizations. See http://docs.oracle.com/javase/7/docs/technotes/guides/vm/performance-enhancements-7.html for examples. What is the difference in the Solaris 11 installation compared to solaris 10 ? where i can find the document describing basic repository concepts ?The best place to start is: http://www.oracle.com/technetwork/server-storage/solaris11/index.html Hope you found the post useful. For questions, input, requests for the second half of the QnA, please find the comment section below.  -- charlie  

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• HTG Explains: What Are the Sys Rq, Scroll Lock, and Pause/Break Keys on My Keyboard?

  - by Chris Hoffman

  Glance at your keyboard and chances are you’ll see a few keys you never use near the top-right corner – Sys Rq, Scroll Lock, and Pause / Break. Have you ever wondered what those keys are for? While these keys have been removed from some computer keyboards today, they’re still a common sight — even on new keyboards. Image Credit: ajmexico on Flickr 8 Deadly Commands You Should Never Run on Linux 14 Special Google Searches That Show Instant Answers How To Create a Customized Windows 7 Installation Disc With Integrated Updates

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• Forwarding emails from a domain

  - by Euwyn

  I generally use Google Apps to handle email domains. I'm unfortunately stuck in an infinite loop with Google [1] for one the domains I recently picked up. Right now I use Zerigo's awesome DNS services. How can I get anything@mydomain.com forwarded to my Gmail account? Better yet if this is a free/cheap solution and can work with multiple aliases going to different real email addresses (a@mydomain.com - joe@gmail.com, b@mydomain.com - [email protected]) [1] Long story. I alternate between "Sorry, you've reached a login page for a domain that isn't using Google Apps." and "This domain has already been registered with Google Apps." Seems like many others are having this issue and Google isn't doing anything about it.

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• Cannot escape character '@' in fstab file

  - by ubuntico

  I want to attach remote FTP directory as a local directory in my system. I will use curlftpfs line in the fstab file , but to login I have to pass my user name and password. The user name has a special character (@) and it needs to be escaped via octal ascii code. The octal ascii for '@' is 100. But when I try to enter the following into the FSTAB file, curlftpfs#myself\100myself.com:ftpPassword@ftp://ftp.mysite.com /mnt/somedir I get an error saying Error connecting to ftp: Couldn't resolve host 'myself.com:ftpPassword@ftp://ftp.mysite.com' The fstab does not recognize escaped symbol @ (\100) and thinks that the FTP site should start immediately after the @ symbol (just like I haven't escaped it). Can someone help? Why I cannot escape @, when it can be done for space character, for example?

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