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• Invalid SSH key erron in juju

  - by Captain T

  This is the output of juju from a clean install with 2 nodes all running 12.04 Precise juju bootstrap - finishes with no errors and allocates the machine to the user but still no joy after juju environment-destroy and rebuild with different users and different nodes. root@cloudcontrol:/storage# juju -v status 2012-06-07 11:19:47,602 DEBUG Initializing juju status runtime 2012-06-07 11:19:47,621 INFO Connecting to environment... 2012-06-07 11:19:47,905 DEBUG Connecting to environment using node-386077143930... 2012-06-07 11:19:47,906 DEBUG Spawning SSH process with remote_user="ubuntu" remote_host="node-386077143930" remote_port="2181" local_port="57004". The authenticity of host 'node-386077143930 (10.5.5.113)' can't be established. ECDSA key fingerprint is 31:94:89:62:69:83:24:23:5f:02:70:53:93:54:b1:c5. Are you sure you want to continue connecting (yes/no)? yes 2012-06-07 11:19:52,102 ERROR Invalid SSH key 2012-06-07 11:19:52,426:18541(0x7feb13b58700):ZOO_INFO@log_env@658: Client environment:zookeeper.version=zookeeper C client 3.3.5 2012-06-07 11:19:52,426:18541(0x7feb13b58700):ZOO_INFO@log_env@662: Client environment:host.name=cloudcontrol 2012-06-07 11:19:52,426:18541(0x7feb13b58700):ZOO_INFO@log_env@669: Client environment:os.name=Linux 2012-06-07 11:19:52,426:18541(0x7feb13b58700):ZOO_INFO@log_env@670: Client environment:os.arch=3.2.0-23-generic 2012-06-07 11:19:52,426:18541(0x7feb13b58700):ZOO_INFO@log_env@671: Client environment:os.version=#36-Ubuntu SMP Tue Apr 10 20:39:51 UTC 2012 2012-06-07 11:19:52,428:18541(0x7feb13b58700):ZOO_INFO@log_env@679: Client environment:user.name=sysadmin 2012-06-07 11:19:52,428:18541(0x7feb13b58700):ZOO_INFO@log_env@687: Client environment:user.home=/root 2012-06-07 11:19:52,428:18541(0x7feb13b58700):ZOO_INFO@log_env@699: Client environment:user.dir=/storage 2012-06-07 11:19:52,428:18541(0x7feb13b58700):ZOO_INFO@zookeeper_init@727: Initiating client connection, host=localhost:57004 sessionTimeout=10000 watcher=0x7feb11afc6b0 sessionId=0 sessionPasswd=<null> context=0x2dc7d20 flags=0 2012-06-07 11:19:52,429:18541(0x7feb0e856700):ZOO_ERROR@handle_socket_error_msg@1579: Socket [127.0.0.1:57004] zk retcode=-4, errno=111(Connection refused): server refused to accept the client 2012-06-07 11:19:55,765:18541(0x7feb0e856700):ZOO_ERROR@handle_socket_error_msg@1579: Socket [127.0.0.1:57004] zk retcode=-4, errno=111(Connection refused): server refused to accept the client

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• Friday Fun: Fort Blaster – Ahoy There

  - by Asian Angel

  In this week’s game you and your pirate crew luck out and find a series of forts full of treasure waiting for you to claim in a campaign of high seas terror. So hoist the colors, grab your favorite cannon, and get ready to blast your way to fame and fortune! How to Banish Duplicate Photos with VisiPic How to Make Your Laptop Choose a Wired Connection Instead of Wireless HTG Explains: What Is Two-Factor Authentication and Should I Be Using It?

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• Determining Keyword Difficulty

  There's nothing worse than optimizing for a search phrase that has high search volume but not ranking in the top 10 for the search and missing out on all the traffic. Without a rating for the difficulty of a keyword, there is no way to know if you're wasting your time pursuing traffic from a search term that you have no chance of ever ranking for.

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• Adobe Flex to Develop Rich Web Applications in An Organized Manner

  AJAX is admired for the establishment of rich Internet applications, but there are high-quality options. This article will establish you to Flex applications, rich Internet applications that run inside the Adobe Flash player. The development of Rich Internet Applications is now in progress.

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• Understanding CTR in Google Webmaster Tools

  - by sam

  I've got a site that's showing a 9% CTR for a phrase in Google Webmaster Tools, but the average position for my site is 14th (this includes 7 local results for this phrase). I was a little confused as to what the CTR actually meant, is it : for each person who searches for that phrase 9% of them click my site. or for each person who actually sees my site in the search results 9% of them click through (bearing in mind 14th is high on page 2 when the local listings are used).

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• What Programming languages/technologies stack to use when building Facebook like website ?

  - by Blaze Boy

  I'm developing a website idea that will perform the same as Facebook functionality without the applications extensibility. the site will have a client application to perform a task similar to dropbox.com the site will be a social network of some sort of professionalism, it will highlight code of almost all languages has a high speed backend database Now what languages/techniques do I need to use to achieve that?

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• Basic Defensive Database Programming Techniques

  We can all recognise good-quality database code: It doesn't break with every change in the server's configuration, or on upgrade. It isn't affected by concurrent usage, or high workload. In an extract from his forthcoming book, Alex explains just how to go about producing resilient TSQL code that works, and carries on working.

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• why my server has a dir named "?"

  - by liuxingruo

  These are all the dirs in my server: ? bin boot dev etc home lib lost+found media media2 misc mnt net opt proc root sbin selinux srv sys tmp usr var why there is a "?" dir? Thanks very much. BTW: the touch command was found on my server(wiered). I list the bin dir: alsacard cp dd env hostname loadkeys more ps sed tcptraceroute alsaunmute cpio df ex igawk loadkeys.static mount pwd setfont traceroute6 arch csh dmesg false ipcalc logger mountpoint raw setserial tracert awk cut dnsdomainname fgrep kbd_mode login mv red sh view basename date doexec gawk keyctl ls netstat redhat_lsb_init sleep ypdomainname bash dbus-cleanup-sockets domainname gettext kill mail nice rm sort cat dbus-daemon dumpkeys grep ksh mailx nisdomainname rmdir stty chgrp dbus-monitor echo gtar ksh93 mkdir pgawk rpm su chmod dbus-send ed gunzip link mknod ping rvi sync chown dbus-uuidgen egrep gzip ln mktemp ping6 rview tar touch is missing, how can i get it back?

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• Beware of SQL Server and PerfMon differences in disk latency calculation

  - by Michael Zilberstein

  Recently sp_blitz procedure on one of my OLTP servers returned alarming notification about high latency on one of the disks (more than 100ms per IO). Our chief storage guy didn’t understand what I was talking about – according to his measures, average latency is only about 15ms. In order to investigate the issue, I’ve recorded 2 snapshots of sys.dm_io_virtual_file_stats and calculated latency per read and write separately. Results appeared to be even more alarming: while for read average latency...(read more)

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• Pressure Washer vs Power Washer

  We all know (or at least suspect) that "pressure" and "power" can be used interchangeably with respect to high-pressure cleaning equipment and services, but which one is more commonly used? This knowledge can be relevant to businesses for their online marketing campaigns and to consumers in their search for information.

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• Installing maven on Ubuntu by manual download

  - by WebDevHobo

  To install Maven, I downloaded the latest version from the website and then followed these steps: http://maven.apache.org/download.html#Installation The last step, the version control, does not work. It says that 'mvn' is currently not installed and that I should type sudo apt-get install maven2 If I go directly to the mvn file itself, it does work: root@ubuntu:~# /usr/local/apache-maven/apache-maven-2.2.1/bin/mvn --version Apache Maven 2.2.1 (r801777; 2009-08-06 12:16:01-0700) Java version: 1.6.0_21 Java home: /usr/java/jdk1.6.0_21/jre Default locale: en_US, platform encoding: UTF-8 OS name: "linux" version: "2.6.32-25-generic" arch: "i386" Family: "unix" So, what am I doing wrong here? Or what would and apt-get install do extra that I might have forgotten?

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• ubuntu 13.04 recognizes usb mobile broadband modem as ethernet connection

  - by Bence Mihalka

  When I plug in my usb mobile broadband modem (ZTE MF-667), in the network manager instead of a mobile broadband connection, I get an ethernet connection, called: Ethernet Network (ZTE WCDMA Technologies MSM), which of course doesn't work. Here is my lsusb output and the relevant parts of dmesg output: lsusb: Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 003: ID 0cf3:3005 Atheros Communications, Inc. AR3011 Bluetooth Bus 001 Device 004: ID 04f2:b1b9 Chicony Electronics Co., Ltd Asus Integrated Webcam Bus 001 Device 005: ID 058f:6366 Alcor Micro Corp. Multi Flash Reader Bus 002 Device 004: ID 19d2:1405 ZTE WCDMA Technologies MSM dmesg: [ 195.328467] usb 2-1.1: new high-speed USB device number 3 using ehci-pci [ 195.423545] usb 2-1.1: New USB device found, idVendor=19d2, idProduct=1225 [ 195.423555] usb 2-1.1: New USB device strings: Mfr=3, Product=2, SerialNumber=4 [ 195.423561] usb 2-1.1: Product: ZTE WCDMA Technologies MSM [ 195.423567] usb 2-1.1: Manufacturer: ZTE,Incorporated [ 195.423572] usb 2-1.1: SerialNumber: P680A1ZTED000000 [ 195.426319] scsi7 : usb-storage 2-1.1:1.0 [ 196.425354] scsi 7:0:0:0: CD-ROM CWID USB SCSI CD-ROM 2.31 PQ: 0 ANSI: 2 [ 197.447919] usb 2-1.1: USB disconnect, device number 3 [ 197.457582] sr0: scsi3-mmc drive: 243x/186x xa/form2 cdda pop-up [ 197.457594] cdrom: Uniform CD-ROM driver Revision: 3.20 [ 197.459058] sr 7:0:0:0: Attached scsi CD-ROM sr0 [ 197.459483] sr 7:0:0:0: Attached scsi generic sg2 type 5 [ 197.759186] usb 2-1.1: new high-speed USB device number 4 using ehci-pci [ 197.854543] usb 2-1.1: New USB device found, idVendor=19d2, idProduct=1405 [ 197.854556] usb 2-1.1: New USB device strings: Mfr=4, Product=3, SerialNumber=5 [ 197.854564] usb 2-1.1: Product: ZTE WCDMA Technologies MSM [ 197.854572] usb 2-1.1: Manufacturer: ZTE,Incorporated [ 197.854579] usb 2-1.1: SerialNumber: P680A1ZTED010000 [ 197.957739] scsi8 : usb-storage 2-1.1:1.2 [ 198.076554] cdc_ether 2-1.1:1.0 eth1: register 'cdc_ether' at usb-0000:00:1d.0-1.1, CDC Ethernet Device, 00:a0:c6:00:00:00 [ 198.076583] usbcore: registered new interface driver cdc_ether [ 198.955985] scsi 8:0:0:0: CD-ROM CWID USB SCSI CD-ROM 2.31 PQ: 0 ANSI: 2 [ 198.956797] scsi 8:0:0:1: Direct-Access ZTE MMC Storage 2.31 PQ: 0 ANSI: 2 I created the appropriate mobile broadband connection manually, but I cannot enable it in network manager, since the device is not recognized as mobile broadband. Any tips how to make it work?

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• A lot of "(direct) / (none)" traffic in Google Analytics

  - by Yoga

  my web site has a lot of "(direct) / (none)" traffic (over 50%) in Google Analytics, but under the "Audience", 100% are new visitors, why is that? I am quite sure most of the Audience should be new visitor, but why so many "(direct) / (none)" traffic? Update: Actually we have launch a new site which this number drop significantly, so I am interested in knowing why the number was so high in the past.

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• Changing x86 Server Market Leads to End of Itanium Development at Microsoft

  The arrival of Intel's Nehalem-EX has pretty much signaled the end of Microsoft's support. High-end x86 servers now sport many features previously available only in Itanium.

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• How to effectively use an overseas SEO team?

  - by Dan Gayle

  My company is currently in contract with a 20+ person team in the Philippines, previously used for comment linking and guest blogging spun content articles. This is a practice that we're stopping, but we don't want to sever our team because they work hard, they're really cheap, and they produce excellent accounting and reporting of their actions. What are ways that we can best put them to use as a link generating or content generating resource? Their English is fair, but not of high enough quality to use them for any direct content creation. Thanks

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• Current SPARC Architectures

  - by Darryl Gove

  Different generations of SPARC processors implement different architectures. The architecture that the compiler targets is controlled implicitly by the -xtarget flag and explicitly by the -arch flag. If an application targets a recent architecture, then the compiler gets to play with all the instructions that the new architecture provides. The downside is that the application won't work on older processors that don't have the new instructions. So for developer's there is a trade-off between performance and portability. The way we have solved this in the compiler is to assume a "generic" architecture, and we've made this the default behaviour of the compiler. The only flag that doesn't make this assumption is -fast which tells the compiler to assume that the build machine is also the deployment machine - so the compiler can use all the instructions that the build machine provides. The -xtarget=generic flag tells the compiler explicitly to use this generic model. We work hard on making generic code work well across all processors. So in most cases this is a very good choice. It is also of interest to know what processors support the various architectures. The following Venn diagram attempts to show this: A textual description is as follows: The T1 and T2 processors, in addition to most other SPARC processors that were shipped in the last 10+ years supported V9b, or sparcvis2. The SPARC64 processors from Fujitsu, used in the M-series machines, added support for the floating point multiply accumulate instruction in the sparcfmaf architecture. Support for this instruction also appeared in the T3 - this is called sparcvis3 Later SPARC64 processors added the integer multiply accumulate instruction, this architecture is sparcima. Finally the T4 includes support for both the integer and floating point multiply accumulate instructions in the sparc4 architecture. So the conclusion should be: Floating point multiply accumulate is supported in both the T-series and M-series machines, so it should be a relatively safe bet to start using it. The T4 is a very good machine to deploy to because it supports all the current instruction sets.

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• How can I setup my local Nginx server so I can edit the files?

  - by Shane Grant

  I have my local development machine running Arch Linux, Nginx, PHP-FPM and MySQL. In order for the websites I am working on to run the files need to be owned by the http user. The files are currently located in folders like this: /srv/http/site1/ /srv/http/site2/ When I use the following chown command on the http folder the sites work fine, but I cannot edit the files with my user: chown -R http.users /srv/http When I do this the sites do not work, but I can edit the files: chown -R shane.http /srv/http How can I make it so that my user can edit the files, and the web server can run them at the same time? Thank you

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• História de Sucesso

  - by Wesley Faria

  ? Neste mês o processador SPARC completa 25 anos, tudo começou  em 1992 quando a Sun lançou o primeiro servidor high-end SPARC. Hoje a família de processadores SPARC é usada nos servidores enterprise da Oracle criando uma arquitetura otimizada para obter o máximo de performance em todo tipo de aplicação, desde CRM, ERP até o Java/Web. Veja a tragetória de Glória do SPARC no link: http://www.oracle-downloads.com/sparc25info/ Parabéns por essa tragetória de sucesso e vida longa ao SPARC !!!!!

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• Harris Corporation Streamlines Manufacturing Assembly Operations with AutoVue

  - by Pam Petropoulos

  "AutoVue is a critical component to our business process; we can’t live without it.” – Charlie Davies, Principal ECAE Applications Engineer, Harris Corporation. Read how Harris Corporation, an international communications and information technology company in the high tech space, is using AutoVue to streamline their manufacturing assembly operations, enhance design reviews and improve communication of engineering changes. Click here to read the complete story.

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• Basic Defensive Database Programming Techniques

  We can all recognize good-quality database code: It doesn't break with every change in the server's configuration, or on upgrade. It isn't affected by concurrent usage, or high workload. In an extract from his forthcoming book, Alex explains just how to go about producing resilient TSQL code that works, and carries on working.

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• Difference between the terms Material & Effect

  - by codey

  I'm making an effect system right now (I think, because it may be a material system... or both!). The effects system follows the common (e.g. COLLADA, DirectX) effect framework abstraction of Effects have Techniques, Techniques have Passes, Passes have States & Shader Programs. An effect, according to COLLADA, defines the equations necessary for the visual appearance of geometry and screen-space image processing. Keeping with the abstraction, effects contain techniques. Each effect can contain one or many techniques (i.e. ways to generate the effect), each of which describes a different method for rendering that effect. The technique could be relate to quality (e.g. high precision, high LOD, etc.), or in-game-situation (e.g. night/day, power-up-mode, etc.). Techniques hold a description of the textures, samplers, shaders, parameters, & passes necessary for rendering this effect using one method. Some algorithms require several passes to render the effect. Pipeline descriptions are broken into an ordered collection of Pass objects. A pass provides a static declaration of all the render states, shaders, & settings for "one rendering pipeline" (i.e. one pass). Meshes usually contain a series of materials that define the model. According to the COLLADA spec (again), a material instantiates an effect, fills its parameters with values, & selects a technique. But I see material defined differently in other places, such as just the Lambert, Blinn, Phong "material types/shaded surfaces", or as Metal, Plastic, Wood, etc. In game dev forums, people often talk about implementing a "material/effect system". Is the material not an instance of an effect? Ergo, if I had effect objects, stored in a collection, & each effect instance object with there own parameter setting, then there is no need for the concept of a material... Or am I interpreting it wrong? Please help by contributing your interpretations as I want to be clear on a distinction (if any), & don't want to miss out on the concept of a material if it should be implemented to follow the abstraction of the DirectX FX framework & COLLADA definitions closely.

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• SQL Server 2012 - Upgrade Whitepaper

  - by JustinL

  Just a short note to mention Microsoft have released the Technical Reference Guide for upgrading to SQL Server 2012. The paper is available for download here: http://tinyurl.com/84xm5b4 There's some interesting details on approaches to upgrade, including features such as high availability, full-text search, service broker and other components (SSIS, SSAS, SSRS). Additionally, there's a (fairly) recent initiative to organise and present TechNet content more easily, there's some useful content (with interesting presentation) at the link below: http://technet.microsoft.com/en-us/library/hh393545.aspx Good luck planning your upgrades, Regards, Justin

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• What is the best way to generate income from mobile games?

  - by Thomas

  As the title states, what is the best way to get income from mobile games? (taking into consideration that creating the games only costs a lot of time and the games are relatively simple) As I see it, there are multiple ways of getting money from mobile games, Selling them for a fixed price (seems like a high threshold for potential buyers) In-game purchases (I can imagine this only works for several types of games, I don't see this working well for monopoly unless you like really fancy hotels ;) Ingame advertisements / sponsorships Which way will most likely bring the most profit?

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• Raspberry Pi stuck at splash screen

  - by Matthew

  I have a raspberry pi and I am stuck at the splash screen. In the top right of the screen there is an image of a Raspberry. When I first power on the device, I get the colored screen, and then I get the image of the raspberry followed by a white cursor which quickly freezes or disappears. I put on the debian version of wheezy that allows java. (the soft float version) Any assistance would be greatly appreciated. BTW I did have it working at one point in time and all I did was go to the terminal (logged out of the GUI) and did a shutdown -h now command. But since then I've even started with a brand new version of the image and it is still not working. Oh and I did try the same SD card with a version of arch linux and it worked fine.

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• Commercial product using a GPL OS

  - by pfried

  we are planning to create a commercial product. The product consists of come MCUs and a small computer (we are developping on a raspberry pi at the moment). The computer needs an operating system as we would like keep things like WLAN and booting as simple as possible. We create some software running on this computer (node.js application). The most operating systems like Arch Linux are licenced under the GPL. The product we would sell contains the computer with preinstalled OS and software. This system operates as a central access point to MCU devices and is able to control them. We use other's software in our product. We do not modify their source code. The product (the computer part) consists of a computer, an OS and software we create. How does the use of an OS affect our own code (licence)? Is there a possibility of avoiding GPL for our own code? eg. shipping the software seperated? Are there any effects to other components of our product, eg. the MCU part? The node.js application delivers a WebApp to the client where it is executed. Are there any effects (As we would like to sell parts of the code as an additional App on the App Stores)? I know we make use of the work of the community and i respect this. The problem is: The software alone is kind of useless without the MCU devices. I do not expect a legal advice.

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