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• Why is the console hanging randomly?

  - by Josh M.

  Ubuntu 10.10 Server x64 installed as Virtual Box VM. Fresh install plus postgresql and tomcat6 installed via aptitude. Rebooted the server and now when I run some command the console hangs. For instance, I run "sudo shutdown now" and then nothing happens but I am not returned to the prompt. I hit CTRL+C and nothing happens except ^C appears on the following line. I can type whatever and it will show up inline. I switch to tty2 and try to login and I only get as far as [username][enter] and that console hangs. One other thing - after "sudo reboot" the console appears to hang (just like above) when shutting down tomcat6. Any idea what's going on or what I should check? Thanks!

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• What is the need for 'discoverability' in a REST API when the clients are not advanced enough to make use of it anyway?

  - by aditya menon

  The various talks I have watched and tutorials I scanned on REST seem to stress something called 'discoverability'. To my limited understanding, the term seems to mean that a client should be able to go to http://URL - and automatically get a list of things it can do. What I am having trouble understanding - is that 'software clients' are not human beings. They are just programs that do not have the intuitive knowledge to understand what exactly to do with the links provided. Only people can go to a website and make sense of the text and links presented and act on it. So what is the point of discoverability, when the client code that accesses such discoverable URLs cannot actually do anything with it, unless the human developer of the client actually experiments with the resources presented? This looks like the exact same thing as defining the set of available functions in a Documentation manual, just from a different direction and actually involving more work for the developer. Why is this second approach of pre-defining what can be done in a document external to the actual REST resources, considered inferior?

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• Replace Broadcom "wl" driver with "b43"

  - by Laszlo Boros

  I'm using Ubuntu 10.04.4 LTS, and in my laptop there is a Broadcom BCM4312 wlan card. lspci output: 04:00.0 Network controller: Broadcom Corporation BCM4312 802.11b/g (rev 01) Subsystem: Broadcom Corporation Device 04b5 Flags: bus master, fast devsel, latency 0, IRQ 18 Memory at f4500000 (64-bit, non-prefetchable) [size=16K] Capabilities: [40] Power Management version 3 Capabilities: [58] Vendor Specific Information Capabilities: [e8] Message Signalled Interrupts: Mask- 64bit+ Queue=0/0 Enable- Capabilities: [d0] Express Endpoint, MSI 00 Capabilities: [100] Advanced Error Reporting Capabilities: [13c] Virtual Channel Capabilities: [160] Device Serial Number 81-ac-1d-ff-ff-12-54-92 Capabilities: [16c] Power Budgeting Kernel driver in use: wl Kernel modules: wl, ssb So as you can see, the current (and default) driver is wl - installed with jockey. But I have another Ubuntu based distribution on my laptop (BackTrack linux), which is also 10.04, but it has the b43 driver installed and the overall performance is MUCH better. So I would like to install it on this OS too, but even google didn't help me. So my question is how to install the latest b43 driver on my Ubuntu?

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• sysctl.conf ignore net settings

  - by Steffen Unland

  I have a little problem with sysctl on a Ubuntu 10.04 LTS system. When I set the sysctl values with "sysctl -w " all work fine, but when I try to use the sysctl.conf file. the net settings will be ignored. For example my sysctl.conf # /etc/sysctl.conf - Configuration file for setting system variables kernel.domainname=findme.sysctl # Corefiles information fs.suid_dumpable=2 kernel.core_pattern=/cores/core-%e-%s-%u-%g-%p-%t ##############################################################3 # Functions previously found in netbase net.ipv4.netfilter.ip_conntrack_tcp_timeout_fin_wait=1 net.ipv4.netfilter.ip_conntrack_tcp_timeout_close_wait=1 when I grep to the values, I can see that the sysctl settings for net.ipv4.netfilter don't set. [host:~ ] $ sysctl -a | grep domainname kernel.domainname = findme.sysctl [host:~ ] $ sysctl -a | grep "core_pattern" kernel.core_pattern = /cores/core-%e-%s-%u-%g-%p-%t [host:~ ] $ sysctl -a | grep "timeout_fin_wait" net.netfilter.nf_conntrack_tcp_timeout_fin_wait = 120 net.ipv4.netfilter.ip_conntrack_tcp_timeout_fin_wait = 120 [host:~ ] $ sysctl -a | grep "timeout_close_wait" net.netfilter.nf_conntrack_tcp_timeout_close_wait = 60 net.ipv4.netfilter.ip_conntrack_tcp_timeout_close_wait = 60 can somebody help me to solve the problem? If you need more information I can post it. Cheers, Steffen

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• How to setup ATI Mobility Radeon HD 4650?

  - by Thi An

  I'm currently using Ubuntu 12.04 64bit. After installing ATI/AMD proprietary FGLRX graphics drivers via Additional Drivers, I checked the status of my VGA card using lspci -v. Here's the output: 02:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI M96 [Mobility Radeon HD 4650] (prog-if 00 [VGA controller]) Subsystem: Dell Device 0456 Flags: bus master, fast devsel, latency 0, IRQ 46 Memory at d0000000 (32-bit, prefetchable) [size=256M] I/O ports at 2000 [size=256] Memory at cfef0000 (32-bit, non-prefetchable) [size=64K] [virtual] Expansion ROM at cfe00000 [disabled] [size=128K] Capabilities: Kernel driver in use: fglrx_pci Kernel modules: fglrx, radeon As mentioned in the title, my VGA card is 1GB and yet my computer only recognizes 256MB. My question is: "How to make my computer fully recognize the capacity of my ATI Mobility Radeon HD 4650 (1GB)?"

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• Good Practices for writing large (team/solo) projects (In C)

  - by Moshe Magnes

  Since I started learning C a few years ago, I have never been a part of a team that worked on a project. Im very interested to know what are the best practices for writing large projects in C. One of the things i want to know, is when (not how) do I split my project into different source files. My previous experience is with writing a header-source duo (the functions defined in the header are written in the source). I want to know what are the best practices for splitting a project, and some pointers on important things when writing a project as part of a team.

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• Do subdomains need to be defined through domain registerar?

  - by Johnny

  I have bought a new domain name from GoDaddy. Let's say it is abcd.com. On GoDaddy's DNS Managing page, I changed A(Host) part to @ = 74.125.232.215 which is www.google.co.uk's IP address. Now if I type www.abcd.com, it directly goes to www.google.co.uk. But if I type http://test.abcd.com, it cannot be loaded. Do I need to define every subdomain through GoDaddy? Is this how it work? P.S. Amazon EC2 directly generates a subdomain for users to reach their virtual PCs. It cannot be domain registerar dependant. P.S.2. Same question for using "www2" at the start of url.

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• Is there a more intelligent way to do this besides a long chain of if statements or switch?

  - by Harrison Nguyen

  I'm implementing an IRC bot that receives a message and I'm checking that message to determine which functions to call. Is there a more clever way of doing this? It seems like it'd quickly get out of hand after I got up to like 20 commands. Perhaps there's a better way to abstract this? public void onMessage(String channel, String sender, String login, String hostname, String message){ if (message.equalsIgnoreCase(".np")){ // TODO: Use Last.fm API to find the now playing } else if (message.toLowerCase().startsWith(".register")) { cmd.registerLastNick(channel, sender, message); } else if (message.toLowerCase().startsWith("give us a countdown")) { cmd.countdown(channel, message); } else if (message.toLowerCase().startsWith("remember am routine")) { cmd.updateAmRoutine(channel, message, sender); } }

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• How to Play Classic Arcade Games On Your PC

  - by Jason Fitzpatrick

  New games with their fancy textures, 3D modeling, and immersive environments have their charm, sure, but what if you crave some old-school arcade gaming? Read on to see how you can turn your computer into an virtual arcade cabinet. Vintage games ran on hardware significantly less powerful than that found in modern desktop computers. With the right software, a joystick or two (if you want to make experience feel more authentic), and a little digging online to find your favorite games, it’s easy to play the arcade hits of your childhood. How to Play Classic Arcade Games On Your PC How to Use an Xbox 360 Controller On Your Windows PC Download the Official How-To Geek Trivia App for Windows 8

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• BigQuery - Best Practices for Running Queries on Massive Datasets

  BigQuery - Best Practices for Running Queries on Massive Datasets Join Michael Manoochehri and Ryan Boyd from the big data Developer Relations team on Friday, September 21th, at 10am PDT, as they discuss best practices for answering questions about massive datasets with Google BigQuery. They'll explore interesting Big Data use cases with some of our public datasets, using BigQuery's SQL-like language to return query results in seconds. They will also cover some of BigQuery's unique query functions as well. For a general overview of BigQuery, watch our overview video: youtu.be Please use the moderator below (goo.gl to ask your questions, which will be answered live! More info here: developers.google.com From: GoogleDevelopers Views: 0 0 ratings Time: 00:00 More in Science & Technology

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• What are some easy techniques to scan books for new information?

  - by aditya menon

  I find it irresistible to keep purchasing cheap programming and technical e-books in fields such as Drupal, PHP, etc., and also compulsively download free material made available such as those from Microsoft's developer blog... The main problem with the large library I've developed is that there are many chapters (especially the first few) in these books packed with information I already know, but with helpful tidbits hidden in between. The logical step would be to skip those chapters and read the ones I don't seem to know anything about, but I'm afraid I may lose out on really important information this way. But naturally it is tedious to have to read about variables, functions and objects all over again when you are trying to know more about the Registry pattern, for example. It's hard to research on the net for this, because my question itself seems vague and difficult to formulate into a single search query. I need people-advice - what do you do in this situation?

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• Configure mailserver to make all the mails come to 1 single mailbox

  - by Vinod K

  mailserever domain name is "Vrk.com".. I want to store message sent to "yahoo.com" too...can i do tht.. I have /etc/postfix/virtual in which i have entered.. @yahoo.com root And 1 more thing...i have user named "vinod" in the mail server...now when i address any mails to "[email protected]"...it works....but when i do "[email protected]"...it gives me error saying...this doesnt exist in the the server...but when i send mails to "[email protected]"...it sends the mails (though it goes into the mail.log as an error entry)...it atleast doesnt stop me from sending it...why is that??

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• MySQL port forwarding

  - by Eduard Luca

  I am trying to help a colleague to connect to my MySQL server. However the situation is a bit special, and here's why (let's call him person A and me, person B): Person A has a PC, on which he has a virtual machine, which is in the same network as the actual PC he's running. However person A is also in the same network with person B (a different network). I want the site that lives on A's VM to be able to connect to the MySQL server on B's PC. For this I've thought a port forwarding would be appropriate: from ip-of-person-A:3306 to ip-of-person-B:3306. This way the site would connect to the IP of the PC it's living on (not the VM), which would forward to A's MySQL. I've seen several examples of port forwarding, but I don't think it's what I need, from what I've seen, it's kind of the opposite. So would something like this be achievable?

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• PowerShell programming conventions

  - by Tahir Hassan

  Do you follow any any conventions when programming in PowerShell? For example, in scripts which are to be maintained long-term do you: Use the real cmdlet name or alias? Specify the cmdlet parameter name in full or only partially (dir -Recurse versus dir -r) When specifying string arguments for cmdlets do you enclose them in quotes (New-Object 'System.Int32' versus New-Object System.Int32 When writing functions and filters do you specify the types of parameters? Do you write cmdlets in the (official) correct case? For keywords like BEGIN...PROCESS...END do you write them in uppercase only? Thanks for any replies.

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• Interactive manifest editing with the Automated Installer Manifest Wizard

  - by Glynn Foster

  Oracle Solaris 11.2 adds a new Automated Installer (AI) Manifest Wizard to allow administrators to more easily create AI manifests for use in provisioning new client systems in the data center. The AI Manifest Wizard is a web web based interface that steps administrators through the basics of the AI manifest - target disks and layout selection, additional ZFS pools and datasets, IPS publisher and package selection, and the creation of any Oracle Solaris Zone virtual environments. The end result is an AI manifest without having to directly edit XML, and this can then be associated with an appropriate AI service. To get started, check out How To Create an Automated Installer Manifest with an Interactive Wizard

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• Workflow Overview & Best Practices - EMEA

  - by Annemarie Provisero

  ADVISOR WEBCAST: Workflow Overview & Best Practices - EMEA PRODUCT FAMILY: EBS - ATG - Workflow   February 16, 2011 at 10:00 am CET, 02:30 pm India, 06:00 pm Japan, 08:00 pm Australia This 1.5-hour session is recommended for technical and functional Users who are interested to get an generic overview about the Tools and Utilities available to get a closer look into the Java Virtual Machine used in an E-Business Suite Environment and how to tune it. TOPICS WILL INCLUDE: Introduction of Workflow Useful Utilities and Tools Best Practices Q&A A short, live demonstration (only if applicable) and question and answer period will be included. Oracle Advisor Webcasts are dedicated to building your awareness around our products and services. This session does not replace offerings from Oracle Global Support Services. Click here to register for this session ------------------------------------------------------------------------------------------------------------- The above webcast is a service of the E-Business Suite Communities in My Oracle Support.For more information on other webcasts, please reference the Oracle Advisor Webcast Schedule.Click here to visit the E-Business Communities in My Oracle Support Note that all links require access to My Oracle Support.

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• Variable declaration versus assignment syntax

  - by rwallace

  Working on a statically typed language with type inference and streamlined syntax, and need to make final decision about syntax for variable declaration versus assignment. Specifically I'm trying to choose between: // Option 1. Create new local variable with :=, assign with = foo := 1 foo = 2 // Option 2. Create new local variable with =, assign with := foo = 1 foo := 2 Creating functions will use = regardless: // Indentation delimits blocks square x = x * x And assignment to compound objects will do likewise: sky.color = blue a[i] = 0 Which of options 1 or 2 would people find most convenient/least surprising/otherwise best?

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• LINQ Style preference

  - by Erin

  I have come to use LINQ in my every day programming a lot. In fact, I rarely, if ever, use an explicit loop. I have, however, found that I don't use the SQL like syntax anymore. I just use the extension functions. So rather then saying: from x in y select datatransform where filter I use: x.Where(c => filter).Select(c => datatransform) Which style of LINQ do you prefer and what are others on your team are comfortable with?

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• node-xmpp-bosh error on Ubuntu 11.10

  - by megueloby

  I am newbie in Linux word. I want to implement a bosh server. Because it is hard on Windows platform I decided to deploy it on a Ubuntu virtual machine via vmware. I made installation without problems. I followed the processes on this page. Now I want to test my bosh server with the command sudo bosh or sudo /etc/init.d/bosh start, after typing those I get on the terminal Starting bosh server after, nothing. I looked on the bosh.err file and I see exec: 2: /usr/local/lib/bosh/run-server.js: Permission denied I don? t know why this error with sudo. When I try ls -l /usr/local/lib/bosh/run-server.js it show -rw-r--r-- 1 root root 4889 2012-04-01 18:50 /usr/local/lib/bosh/run-server.js How can I make bosh start?

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• Should I use a Class or Dictionary to Store Form Values

  - by Shamim Hafiz

  I am working on a C# .NET Application, where I have a Form with lots of controls. I need to perform computations depending on the values of the controls. Therefore, I need to pass the Form values to a function and inside that function, several helper functions will be called depending on the Control element. Now, I can think of two ways to pass all the Form values: i) Save everything in a Dictionary and pass the Dictionary to the function or ii) Have a class with attributes that corresponds to each of the Form element. Which of these two approaches , or any other, is better?

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• Acceptable GC frequency for a SlimDX/Windows/.NET game?

  - by Rei Miyasaka

  I understand that the Windows GC is much better than the Xbox/WP7 GC, being that it's generational and multithreaded -- so I don't need to worry quite as much about avoiding memory allocation. SlimDX even has some unavoidable functions that generate some amount of garbage (specifically, MapSubresource creates DataBoxes), yet people don't seem to be too upset about it. I'd like to use some functional paradigms to write my code too, which also means creating objects like closures and monads. I know premature optimization isn't a good thing, but are there rules of thumb or metrics that I can follow to know whether I need to cut down on allocations? Is, say, one gen 0 GC per frame too much? One thing that has me stumped is object promotions. Gen 0 GCs will supposedly finish within a millisecond or two, but if I'm understanding correctly, it's the gen 1 and 2 promotions that start to hurt. I'm not too sure how I can predict/prevent these.

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• Are there web frameworks/tools that optimize for speed of development?

  - by Ahmet Yildirim

  I've been a PHP web developer for about 2 and a half years now. I have started using CodeIgniter framework to shorten development process a while ago. I developed 4 websites using CodeIgniter. It has been really tiring and boring due to code-repetition. Code repetition was vast on form handling functions in controllers.So in my last project , i developed a general form input handling function.This lead a realisation that it could get even faster by more automation. What i think i lack in my development is using CRUD & Code Generation tools. But i am wondering if there is any other utilities that shortens development process. Which web development language or framework more inclined towards code generation utilities?

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• Presentations about SARGability tomorrow

  - by Rob Farley

  Tomorrow, via LiveMeeting, I’m giving two presentations about SARGability. That’s April 27th , for anyone reading this later. The first will be at the Adelaide SQL Server User Group . If you’re in Adelaide, you should definitely come along. Both meetings are being broadcast to the PASS AppDev Virtual Chapter . The second will be in the Adelaide evening at 9:30pm, and will just be and my computer. The audience will be on the other end of a phone-line, which is very different for me. I’m very much...(read more)

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• Unable to install VMWare Workstation v8

  - by pst007x

  Installing VMware 8.0.2 64bit Ubuntu 12.04LTS 64bit BETA My Kernel version is: 3.2.0-20-generic pst007x@pst007x-Aspire-5741:~$ sudo sh VMware-Workstation-Full-8.0.2- 591240.x86_64.bundle Installs ok When I launch I am asked to install modules which are compiled and loaded into the running kernel. A window opens VMware Kernel Module Updater This fails on Virtual Network Device ERROR LOG. UPDATE: PATCH. When I try to add patch, following error: pst007x@pst007x-Aspire-5741:~$ sudo sh patch-modules_3.2.0.sh [sudo] password for pst007x: patch-modules_3.2.0.sh: 27: [: workstation8.0.2: unexpected operator patch-modules_3.2.0.sh: 28: [: workstation8.0.2: unexpected operator Sorry, this script is only for VMWare WorkStation 8.0.2 or VMWare Player 4.0.2. Exiting pst007x@pst007x-Aspire-5741:~$ I have fully un-installed, and re-installed. I am installing the correct version. Probably a problem with the patch. VMware installs perfectly on Ubuntu 11.10 This is how I uninstalled.

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• Installing an asp application on a dnn server

  - by Cody Henrichsen

  I created a registration db/web application in C# for some workshops. The organization requesting is hosted on a DotNetNuke server. What changes do I need to make to the web.config so it can run under the site. Currently when I try to go to a page it get an error: Server Error in '/' Application. Configuration Error Description: An error occurred during the processing of a configuration file required to service this request. Please review the specific error details below and modify your configuration file appropriately. Parser Error Message: It is an error to use a section registered as allowDefinition='MachineToApplication' beyond application level. This error can be caused by a virtual directory not being configured as an application in IIS.

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