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• Avoid random disk names

  - by BarsMonster

  Hi! I have Ubuntu Server 10.04 1 system disk, and 5 disks in RAID-5 configuration. The problem is that names of these disks are changed from time to time, they are being randomly mixed from time to time (sda,b,c,d,e,f - so system disks might be sda, or sdc at different time for example).... is there any way to fix drive names, so that even if it's disconnected for example, no other drive can occupy this letter based on disk UUID or something?

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• not able to login in ubuntu box with root password

  - by pankaj sharma

  i have ubuntu 10.04 on my sytem, i run command apt-get install csh on the system and try to change the shell by command chsh -s but now the prob is when i try to login the system by ssh i am not able to login by any user account except one and try to change the user su - root it is showing cannot execute c: no such file or directory and look in the /etc/passwd file for root account in shell field C is written in place of /bin/sh help me out to restore the settings

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• WSS - Server Error in "/" Application. Compilation Error Message: CS1006: Could not write to output

  - by ptahiliani

  I got the above errror when I tried to run WSS default site after installing and running the Advance System Optimizer 3.o. I resolve this by going to the following locations and adding permission for the admin users accounts (ASP.NET & IIS_WPG) I have set up for Sharepoint. C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files C:\WINDOWS\System 32\Log Files C:\WINDOWS\Temp After the correct permissions have been added, Sharepoint works as normal.

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• How does the Ubuntu upgrade process work?

  - by IDWMaster

  How does Ubuntu upgrade seamlessly to a newer distribution, while the operating system is still running? I'm upgrading from 10.10 to 11.04, and I've upgraded several times before, and it's as simple as running update-manager -d and downloading and installing them, then rebooting. How exactly does this work though? How is the upgrade manager able to update the operating system while it is still in use?

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• Oracle UK Technology "Tech Fest"

  - by rituchhibber

  ** As a priority partner, we are sending you advance notice of these exclusive “Technology Test Fest” free examination sessions. Please note that this communication will be sent out to the wider community one week from today, so please register immediately to secure your place! ** We are delighted to offer you the exclusive opportunity to register and attend the Oracle UK “Technology Test Fest” being held as Part of the UKOUG Conference at the ICC in Birmingham in the Drawing Room at the Hyatt Regency hotel adjacent to the ICC venue, from 3rd to 5th December  2012. This is your opportunity to sit your chosen Oracle Technology Specialist Implementation Exam free of charge on this day. Four sessions are being run (10.00AM and 14.00PM), with just 15 places at each session – so register now to avoid disappointment! (Exams take about 1.5 hours to complete.) Which Implementation Specialist Exams are available to take? Click here to see the list of exams available for you to sit for free at the Oracle UKOUG “Technology Test Fest”. The links also include the study guide for the particular exam. Please review the Specialization Guide as well. How do I register for the Oracle UK “Technology Test Fest”? Fill out the Pearson Vue profile here and complete it with your OPN Company ID. NB: Instructions on how to create/update the profile can be found here. Register for one of the 4 sessions using the registration links at the top of this page. 03rd December, 2012 at 14:00 04th December, 2012 at 10:00 am (Morning Session) 04th December, 2012 at 14:00 (Afternoon Session) 05th December, 2012 at 10:00 am (Morning Session) VENUE DETAILS: The Drawing Room Hyatt Regency Hotel Birmingham, 2 Bridge Street Birmingham, BI 2JZ 3 - 5 December 2012 You will need to bring your own laptop with 'Windows OS' and a form of identification to be able to take any of the exams. Need Help or Advice? For more information about the tests and Get Specialized programme, please contact: Ishacq Nada. For issues with your profile or any other OPN-related problems, please contact our: Oracle Partner Business Centre or call 08705 194 194. We look forward to welcoming you to the Oracle UK “Technology Test Fest” on the 3rd- 5thDecember 2012! Book early to avoid disappointment.

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• Designing Efficient SQL: A Visual Approach

  Sometimes, it is a great idea to push away the keyboard when tackling the problems of an ill-performing, complex, query, and take up pencil and paper instead. By drawing a diagram to show of all the tables involved, the joins, the volume of data involved, and the indexes, you'll see more easily the relative efficiency of the possible paths that your query could take through the tables.

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• Encapsulating code in F# (Part 1)

  - by MarkPearl

  I have been looking at F# for a while now and seem a few really interesting samples and snippets on howto’s. This has been great to see the basic outline of the language and the possibilities, however a nagging question in the back of my mind has been what does an F# project look like? How do I code group code in F# so that it can be modularized and brought in and out of a project easily? My Expert F# book has an entire chapter (7) dedicated to this and after browsing the other chapters of the book I decided that this topic was something I really wanted to know more about now! Because of my C# background I keep trying to think in F# of objects. So to try and get a clearer idea of how to do things the F# way I am first going to take a very simplified C# example and try to “translate” it. using System; namespace ConsoleApplication1 { namespace ExampleOfEncapsulationInCSharp { class Program { static void EncapsulatedVariableInAMethod() { int count = 10; Console.WriteLine(count); } static void Main(string[] args) { EncapsulatedVariableInAMethod(); Console.ReadLine(); } } } } From the above example the count integer is encapsulated within EncapsulatedVariableInAMethod method. You couldn’t access the count variable from outside the scope of its parent method but have full access to it within the method. Lets look at my F# equivalent… open System let EncapsulatedVariableInAMethod = let count = 10 Console.WriteLine(count) () EncapsulatedVariableInAMethod Console.ReadLine()   Now, when I first attempted to write the F# code I got stuck… I didn’t have the Console.WriteLine calls but had the following… open System let EncapsulatedVariableInAMethod = let count = 10 EncapsulatedVariableInAMethod Console.ReadLine()   The compiler didn’t like the let before the count = 10. This is because every F# expression must evaluate to a value. If I did not want to make the Console call, I would still need to evaluate the expression to something – and for this reason the Unit Type is provided. I could have done something like…. open System let EncapsulatedVariableInAMethod = let count = 10 () EncapsulatedVariableInAMethod Console.ReadLine()   Which the compiler would be happy with…

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• ExplorerCanvas and JQuery

  - by PhubarBaz

  I am working on a Javascript app (CloudGraph) that uses HTML5 canvas and JQuery. I'm using ExplorerCanvas to support canvas in IE. I recently came across an interesting problem. What I was trying to do is restore the user's settings when the page is loaded. I read some information from a cookie that I set the last time the user accessed the application. One of these settings is the size of the canvas. I decided that the best place to do this would be when the document is ready using JQuery $(document).ready(). This worked fine in browsers that natively support the canvas element. But in IE it kept getting errors the first time I would hit the page. It seemed that the excanvas element wasn't initialized yet because I was getting null reference and unknown properties errors. If I refreshed the page the errors went away but the resized canvas wasn't drawing on the entire area of the canvas. It was like the clipping rectangle was still set to the default canvas size. I found that the canvas element when using excanvas has a div child element which is where the actual drawing takes place. When I changed the width and height of the canvas element in document.ready it didn't change the width and height of the child div. Initially my solution was to also change the div element when changing the canvas element and that worked. But then I realized that having to refresh the page every time I started the app in IE really sucked. That wouldn't be acceptable for users. Since it seemed like the canvas wasn't getting initialized before I was trying to use it I decided to try to initialize my app at a different time. I figured the next best place was in the onload event. Sure enough, moving my initialization to onload fixed all of the problems. So, it looks like the canvas shouldn't be manipulated until the onload event when using ExplorerCanvas. There might be ways to do it when the document is ready. I found some posts on initializing excanvas manually, but for me waiting until onload worked just fine.

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• Create a Monitoring Server for SQL Server with PowerShell

  At some point you are going to need a notification system for a range of events that occur in your servers. Laerte Junior shows how you can even set up temporary or permanent alerts for any WMI events to give you a system that fits your server environment perfectly. Get Smart with SQL Backup Pro Powerful centralised management, encryption and more.SQL Backup Pro was the smartest kid at school Discover why.

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• Exadata Planning and Development Workbook

  - by Javier Puerta

  The Oracle Exadata Workbook series has been created to provide guidance for planning,installing, operating and maintaining Oracle Exadata Database Machines. These workbooks will help you identify specific needs, address potential challenges, and understand the opportunities associated with owning this advanced Engineered System. A well-planned implementation will help you realize the performance,scalability, and administrative improvements of an Oracle Exadata system. Register with your OTN login to download the first workbook in the Oracle Exadata Admin series.

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• Exadata Planning and Development Workbook

  - by Javier Puerta

  The Oracle Exadata Workbook series has been created to provide guidance for planning,installing, operating and maintaining Oracle Exadata Database Machines. These workbooks will help you identify specific needs, address potential challenges, and understand the opportunities associated with owning this advanced Engineered System. A well-planned implementation will help you realize the performance,scalability, and administrative improvements of an Oracle Exadata system. Register with your OTN login to download the first workbook in the Oracle Exadata Admin series.

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• Flags with deferred use

  - by Trenton Maki

  Let's say I have a system. In this system I have a number of operations I can do but all of these operations have to happen as a batch at a certain time, while calls to activate and deactivate these operations can come in at any time. To implement this, I could use flags like doOperation1 and doOperation2 but this seems like it would become difficult to maintain. Is there a design pattern, or something similar, that addresses this situation?

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• git workflow for separating commits

  - by gman

  Best practices with git (or any VCS for that matter) is supposed to be to have each commit do the smallest change possible. But, that doesn't match how I work at all. For example I recently I needed to add some code that checked if the version of a plugin to my system matched the versions the system supports. If not print a warning that the plugin probably requires a newer version of the system. While writing that code I decided I wanted the warnings to be colorized. I already had code that colorized error message so I edited that code. That code was in the startup module of one entry to the system. The plugin checking code was in another path that didn't use that entry point so I moved the colorization code into a separate module so both entry points could use it. On top of that, in order to test my plugin checking code works I need to go edit UI/UX code to make sure it tells the user "You need to upgrade". When all is said and done I've edited 10 files, changed dependencies, the 2 entry points are now both dependant on the colorization code, etc etc. Being lazy I'd probably just git add . && git commit -a the whole thing. Spending 10-15 minutes trying to manipulate all those changes into 3 to 6 smaller commits seems frustrating which brings up the question Are there workflows that work for you or that make this process easier? I don't think I can some how magically always modify stuff in the perfect order since I don't know that order until after I start modifying and seeing what comes up. I know I can git add --interactive etc but it seems, at least for me, kind of hard to know what I'm grabbing exactly the correct changes so that each commit is actually going to work. Also, since the changes are sitting in the current directory it doesn't seem like it would be easy to run tests on each commit to make sure it's going to work short of stashing all the changes. And then, if it were to stash and then run the tests, if I missed a few lines or accidentally added a few too many lines I have no idea how I'd easily recover from that. (as in either grab the missing lines from the stash and then put the rest back or take the few extra lines I shouldn't have grabbed and shove them into the stash for the next commit. Thoughts? Suggestions? PS: I hope this is an appropriate question. The help says development methodologies and processes

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• Projectile Rotation

  - by Alex

  I'm trying to add a projectile system like the projectiles in Realm Of The Mad God. (YouTube it to see what I mean) These projectiles seem to move according to their rotation perfectly and can have nearly any rotation. They also have near perfect hitboxing. What's the maths behind this? My Game works on an integer-based coordinate system, but at the moment projectiles can only shoot either 0, 45, 90, 135, 180, 225, 270 and 315 degrees.

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• Unittest test case only touches the file name

  - by Chen OT

  I was told that unittest is fast and the tests which touches DB, across network, and touches FileSystem are not unittest. In one of my testcases, its input are the file names (amount about 300~400) under a specific folder. Although these input are part of file system, the execution time of this test is very fast. Should I moved this test, which is fast but touches file system, to higher level test?

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• Ubuntu 12.04 partial freeze

  - by user1550594

  While working on the system suddenly if i open a random file or start browsing and on other random moments the system starts hanging or start responding slowly. In this situation, i can able to open the virtual console using the Ctrl + Alt + F1-F6 and type the top and list the processes. Due to urgency, i will kill the long running processes or the over memory utilizing process to recover the screen back. Can anyone give me a permanent fix.!

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• Why Your Web Success Depends on One Way Backlinks

  If you own a website and you want your website to be successful by drawing traffic to it then you need a one way backlinks. The more traffic that visits your website long term means he eventually your website will get top ranking in the search engines that are related to your business.

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• A new number one

  - by nospam(at)example.com (Joerg Moellenkamp)

  The Top500 supercomputer list has a new number one: The K Computer, built by Fujitsu, currently combines 68544 SPARC64 VIIIfx CPUs, each with eight cores, for a total of 548,352 cores?almost twice as many as any other system in the TOP500. The K Computer is also more powerful than the next five systems on the list combined.Interestingly this system runs under Linux. And it uses tofu as its interconnect

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• Help recovering broken OS (permissions issue)

  - by Guandalino

  (At the bottom there is an important update.) I was doing experiments in order to backup a remote account to my local system, Ubuntu 12.04 LTS. I'm not confident with duplicity and probably, due to wrong syntax, some local files have been replaced with remote files. This is just a supposition, I'm not sure this is the real cause of OS corruption. The corruption happened after experimenting with backups, so I think I did something wrong at this regard. I was aware there was a problem when I tried to access a command using sudo: $ sudo ls sudo: unable to open /etc/sudoers: Permission denied sudo: no valid sudoers sources found, quitting sudo: unable to initialize policy plugin This is how /etc/sudoers looks like: $ ls -ald /etc/sudoers -r--r----- 1 root root 788 Oct 2 18:30 /etc/sudoers At this point I tried to reboot and now this is the message I get: The system is running in low graphics mode. Your screen, graphics card and input device settings could not be detected correctly. You will need to configure these yourself. I tried to follow the wizard to configure these settings, but without luck (the system prevents me going on when I press "Next"). The thing that makes me a bit less worried is that all the data on the disk seems readable and I'm able to access them using a live cd. I run memtest and RAM seems to be OK. Do you have any idea about how to recover my system? I'm very glad to provide further information, just let me know what info could be helpful. UPDATE. The issue is about wrong permissions and this is how I discovered: I mounted the root partition of the broken OS on /mnt/broken/ (live CD) and did ls /mnt/broken/. I got a permission denied error, while I expected to have the directory listing. I had to do sudo ls /mnt/broken/ and this worked. Thus without having root permission via sudo it's impossible to access the root of broken os. The current output of ls -ld /mnt/broken/ is: drwxr-x--- 29 1000 812 4096 2012-12-08 21:58 /mnt/broken Any thoughts on how to restore the old (working) set of permissions?

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• Information About Mambo and Joomla

  JOOMLA and MAMBO was originally developed by a team called Mambo. In 2005, the main developers of Mambo left the team and build the JOOMLA system. Regardless of the history of these two systems, they have turn into a leading hosting system in the industry. These two CMS platform software is the most easiest to use and manage content management that is why it is the most preferred CMS software by most web developer.

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• Virtual Control - Linux, VirtualBox and OS/2 or eComStation

  <b>The ERACC Web Log:</b> "This is part one of a two part article about a &#8220;real life&#8221; control system that is a candidate for moving to a VM on Linux. This control system is being used right now in a real manufacturing facility."

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• How to enable dual monitors with two ATI Radeon 4350 HD graphics cards?

  - by Christophski

  I have bought two ATI Radeon 4350 HD graphics cards and they both work well seperately. But only the first one will output most of the time. If I go to System - Appearance - Monitors it will only detect the monitor on the first graphics card. I have check using hardinfo and the system has definitely detecting both of the graphics cards so I don't know why it isn't detecting the monitor. I am running Maverick 64 bit

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• If You Truly Want To Make the Best of Your Radeon 9800 Pro Driver Then You Should Get Focus on The F

  The Radeon 9800 pro driver needs connection to the inner power supply of your desktop system for it to operate. If your system does not have the necessary power source, a number of internal devices c... [Author: Sunny Makkar - Computers and Internet - March 20, 2010]

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• Graphic crash after Ubuntu 12.04 minor update

  - by user68753

  My problem came after doing a normal packages update in 12.04 and then reboot to never been able to boot normally, it appear the "The system is running in low-graphics mode" window and then I tried to fix the problem reinstalling the gmd. Now I'm reinstalling the whole system, from the USB boot it went everything as usual before that update. I just want to never have to reinstall Ubuntu in this way again. Any thoughts? I'm using Ubuntu 12.04 LTS on an Acer Aspire One D255

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• Connect to wifi ubuntu 14.04 (new ubuntu user)

  - by user289168

  I have recently changed my operating system from windows 8 to ubuntu 14.04, when trying to connect to the network via wifi the system just keeps asking for my password over and over without connecting. The connectivity through an Ethernet cable is perfectly fine however and my wifi worked fine through windows 8, I have very little ubuntu knowledge so i apologise if the right information is not shown in this question. Just wondering if there was any known problems or if anyone has seen this before? Thanks in advance for any help, Tom

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