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• Is LightDM is broken? Autologin works

  - by Ben

  I recently upgraded my Mythbuntu box to 11.10. LightDM worked for a while and then I configured autologin on my user account. After some time, I've removed some packages to lean down the system. Now when I log out (from either Unity or Gnome Shell) I lose the X session, LightDM doesn't start back up. If I disable autologin through /etc/lightdm/lightdm.conf I get no login screen & no X. As I said, autologin works and gives me a Ubuntu Classic desktop. This is the only reference in dmesg to lightdm; [ 17.351023] type=1400 audit(1329530135.420:19): apparmor="STATUS" operation="profile_load" name="/usr/lib/lightdm/lightdm-guest-session-wrapper" pid=1097 comm="apparmor_parser" Can anyone help?

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• Python as a first language?

  - by user64085

  I have just started working in Information Security World. I want to learn the Python language for creating my own automated tool for Fuzzing, SQL-Injection etc. My question is I don't know much about C language (only basic knowledge) but I want to learn directly Python Language so is it good? I have seen there is lots of difference between Python and C (obviously) and for Information Security field Python = GOD so I want to know learning Python need any experience on C language? If not so can I start learning Python directly?

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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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• How do you end up with event-sourcing if you use a xDD approach?

  - by Tomas Jansson

  When working in a TDD or BDD manner your unit tests are supposed to drive your design. But how do you end up with event-sourcing using a xDD techniques? As I see it event sourcing is something you need to adopt early on to take full advantage of it. Lets say that you start without event-sourcing and do a release. Later on when you are releasing version 2.0 you realize that it would be great to use event-sourcing, but at that point you alread have missed all the events from version 1.0 so it makes it much harder to implement. Or do you take some kind of backup of your db from before event-sourcing and use that as base line and then add event-sourcing on top of that?

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• using x11 forwarding with ssh and vnc?

  - by simona

  I am working on a remote cluster via ssh with the -X option, because I need to visualize data and graphs, over a vpn protocol. Sometime due to the instability of the internet connection I lose my session. They told me I could use vnc in order to not lose my current session, so that if the internet connection drops I can reconnect and continue with my previously open session. What I do is to log in the remote cluster 'remote.cluster' and type vncserver :1 then I open another terminal on my system and I type ssh -C -NL 5901:remote.cluster:5901 [email protected] & Then I start vinagre on my system and I connect using ssh protocol. The problem is that I do not have x11 forwarding and I cannot open windows. If I try to connect using the vnc protocol with vinagre it doesn't connect, because I get something as connection timeout. What should I do?

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• Ubiquity crashes when installing Ubuntu 10.10 from CD

  - by Ashes

  I didn't want to take any risks so I ordered a CD from Canonical to get Ubuntu. Thing is, another CD was given to me about 2 days before the CD from Canonical got to me, so I installed Ubuntu 10.10 but there was a problem with the login screen (When the Ubuntu logo should be displayed, it wasn't, instead it would just say "Ubuntu 10.10") so I decided to reinstall Ubuntu 10.10 with the CD that arrived a few days later. Whenever it's finishing the installation, the installer (ubiquity) crashes, or sometimes it gets to the part where the boot loader should be installed and for some reason it is unable to install the boot loader (if I choose not to install it, I don't get how to start Ubuntu, since you have to reboot my laptop after the installation is over). I'm currently running Ubuntu 10.10 from the CD I ordered, since I have no other OS on this laptop.

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• GPT Not mounting using "normal" GPT mounting techniques 12.04

  - by Roy Markham

  I've got two 2TB drivess: one MBR and the other GPT. sudo blckid /dev/sdb1 returns a blank. gdisk shows: Partition table scan: MBR: protective BSD: not present APM: not present GPT: present Found valid GPT with protective MBR; using GPT. Warning! Secondary partition table overlaps the last partition by 1970 blocks! You will need to delete this partition or resize it in another utility. Disk /dev/sdb: 3907027055 sectors, 1.8 TiB Logical sector size: 512 bytes Disk identifier (GUID): 38A1113D-B5E9-4B69-ABFF-ACB27AFB3DDD Partition table holds up to 128 entries First usable sector is 34, last usable sector is 3907027021 Partitions will be aligned on 8-sector boundaries Total free space is 2014 sectors (1007.0 KiB) Number Start (sector) End (sector) Size Code Name 1 34 262177 128.0 MiB 0C01 Microsoft reserved part 2 264192 3907028991 1.8 TiB 0700 Basic data partition mounting via fstab or -t gives same error when using NTFS or NTFS-3g "NTFS signature is missing" GParted says one partition is overwriting another, yet windows shows no errors at all. The drive is also mounted easily via MacOs (triple boot)

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• Spending the summer at camp Web Camp, that is

  Microsoft is sponsoring a series of Web Camps this summer. Theyre a series of free two day events being held worldwide, and Im really excited about being taking part. The camp is targeted at a broad range of developer background and experience. Content builds from 101 level introductory material to 200-300 level coverage, but we hit some advanced bits (e.g. MVC 2 features, jQuery templating, IIS 7 features, etc.) that advanced developers may not yet have seen. We start with a lap around ASP.NET...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• How to Use Windows 8's Storage Spaces to Mirror & Combine Drives

  - by Chris Hoffman

  “Storage Spaces” is a new feature in Windows 8 that can combine multiple hard drives into a single virtual drive. It can mirror data across multiple drives for redundancy or combine multiple physical drives into a single pool of storage. You can even create pools of storage larger than the amount of physical storage space you have available. When the physical storage fills up, you can plug in another drive and take advantage of it with no additional configuration required. Storage Spaces is similar to RAID or LVM on Linux. The HTG Guide to Hiding Your Data in a TrueCrypt Hidden Volume Make Your Own Windows 8 Start Button with Zero Memory Usage Reader Request: How To Repair Blurry Photos

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• Workshop in Denver canceled - thanks to hurricane Isaac

  - by Mike Dietrich

  Yesterday Roy did start his journey on time to travel to Denver, CO for today's Upgrade and Migration Workshop.  But unfortunately due to the remnants of  hurricane Issac moving up the East Coast and scrambling up flight schedules Roy's flight from NYC to Denver got canceled after a 3 hour delay leaving Manchester, NH, and there was no option to arrive in Denver this morning on time. So we apologize for canceling that workshop. The local marketing department will contact you regarding an alternative date. Sorry for any inconvenience!

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• ntfsresize volume and size information

  - by antonio

  I am going to resize my sda2 NTFS partition. When gathering info with ntfsresize, I get: ntfsresize --info /dev/sda2 ntfsresize v2013.1.13 (libntfs-3g) Device name : /dev/sda2 NTFS volume version: 3.1 Cluster size : 4096 bytes Current volume size: 21999993344 bytes (22000 MB) Current device size: 23622320128 bytes (23623 MB) Checking filesystem consistency ... Accounting clusters ... Space in use : 10673 MB (48.5%) Collecting resizing constraints ... You might resize at 10672590848 bytes or 10673 MB (freeing 11327 MB). Please make a test run using both the -n and -s options before real resizing! Can you tell me what is the difference between volume and device size? As for device size, 23622320128 bytes / 1000^2 = 23622.3 MB. Why is 23623 MB reported instead of 23622? Note that parted confirms this value: parted /dev/sda2 unit MB p Model: Unknown (unknown) Disk /dev/sda2: 23622MB Sector size (logical/physical): 512B/512B Partition Table: loop Disk Flags: Number Start End Size File system Flags 1 0.00MB 23622MB 23622MB ntfs

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• Running UBUNTU from a USB Flash drive on Acer

  - by Byron Blue

  I've made a bootable USB flash drive to run UBUNTU. The drive works fine on MOST laptops/computers I try: It does not want to start on my (favourite) Acer Aspire 5745 (Windows 7 64 bit). The opening screen has SYSLINUX 4.06 EDD 4.06-pre1 (...) and simply sits there. I was using UBUNTU 12.04.1 64 bit until I tried booting to the Acer this morning. I've tried booting to 10.04 as well (saw this as a fix on a discussion) with the same result. I really want to use the Acer for development and do not want to wipe my Windows 7 from the hard disk. Are there any solutions/answers?

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• Why can't I upgrade my kernel via the terminal?

  - by Alvar

  If I type sudo apt-get update && sudo apt-get upgrade I can only see that the kernel packages are kept back, and not installed. As the screenshot shows. If I then start the update manager I can install the kernel, with no problems at all. As the second screenshot shows. Why is this? The kernel is a new package and not an upgrade of an old one, this is why you can't use the command upgrade that upgrades packages. You need to use the command dist-upgrade to install new packages.

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• The SQL Beat Podcast-Capturing a SQL Rockstar

  - by SQLBeat

    This is the first permissible (waiting for signed disclaimers) episode of the SQL Beat Podcast featuring the gracious and famous Thomas La Rock. We talk about gay marriage, abortion, SQL community and a 9 inch pipe with a hole in it at the tip. No really. If there ever was a gentleman, SQL Rockstar is one and I want to thank him from the bottom of my digital recorder for agreeing to talk to me and my audience. All forty of them will appreciate the candor. Enjoy World. I did. Oh and a special rock start drum intro from me to you. CLICK HERE TO PLAY >>

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• Enabling multitouch on an acer 5742?

  - by Ben

  I am trying to get multitouch to work on my touchpad. I am currently trying to run a script to get it to work. It is set to start on boot, saved as .run and has been made executable. here is the code: #!/bin/bash #enable multitouch sleep 10 xinput set-int-prop "SynPS/2 Synaptics TouchPad" "Two-Finger Scrolling" 8 1 xinput set-int-prop "SynPS/2 Synaptics TouchPad" "Synaptics Two-Finger Scrolling" 8 1 1 xinput set-int-prop "SynPS/2 Synaptics TouchPad" "Synaptics Two-Finger Pressure" 32 10 xinput set-int-prop "SynPS/2 Synaptics TouchPad" "Synaptics Two-Finger Width" 32 8 xinput set-int-prop "SynPS/2 Synaptics TouchPad" "Synaptics Edge Scrolling" 8 0 0 0 xinput set-int-prop "SynPS/2 Synaptics TouchPad" "Synaptics Jumpy Cursor Threshold" 32 110 synclient TapButton2=2 exit the commands make multi touch work if I enter them in the terminal, but the script itself does not work. any suggestions?

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• How are buttons made to be clicked?

  - by Johnny

  I just want to ask a general question. According to that answer, Ill continue thinking. You know in games there are lots of clickable items. Play button, exit, comboboxes maybe etc. My question is are those buttons drawn in same canvas with background and all other things, or for every different thing there is another canvas object? My question is about for general. Im not asking about a specific game, im asking how they are made generally. Im planning to start a game on Android, and Im confused actually how to design buttons, and other object. Probably Im going to use View/SurfaceView for now. I don't have much experience with OpenGL yet. Thanks in advance.

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• Getting up and started with the Windows Phone Developer Tools 7.1 Beta 2

  - by mbcrump

  Windows Phone Developer Tools 7.1 Beta 2 was released on 6/29/2011. Are you ready for it? If not then let my guide help you get your system prepared and go through a few new features. Download links: Web Installer of Windows Phone 7.1 Beta 2 SDK ISO Image of Windows Phone 7.1 Beta 2 SDK - (723 MB) To get started you are going to need to remove the previous version of your Windows Phone Developer Tools 7.1 Beta 1.   This kicks off the process of uninstalling the Beta.   Once it is uninstalled then you are going to want to grab the bits from: http://www.microsoft.com/download/en/details.aspx?id=26648. The only thing your interested in here is the vm_web2.exe.   Make sure before you start that Zune is not running or you will get this error message like this one and have to restart from scratch. Now just go through your normal Install Screens. It should be installed and ready to go: A couple of things to note: 1) When creating a new phone application you now have several new templates to choose from as shown below. I welcome this addition because I’m a firm believer that we need more templates in order to get more people started. 2) Once you select an application template you can now pick which version of the Windows Phone platform that you wish to target: 3) If you created a WP7 7.1 Beta 1 project that it will still work properly in WP7 7.1 Beta 2. 4) You now have access to the search app icon. Once pressed then you will see something like this: 5) Under Settings –> Applications. You now have background tasks. 6) You will notice that the Web Browser looks a little different with the URL now located at the bottom of the screen and completely removing the “add”, “favorites” and “tabs” icon. Those icons are now moved to the menu bar.   That is it for my “Getting up and going with the Windows Phone Developer Tools 7.1 Beta 2”. I hope you enjoyed it and please feel free to subscribe to my feed or follow me on Twitter.   Subscribe to my feed

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• Setting up Oracle Linux 6 with public-yum for all updates

  - by wcoekaer

  I just wanted to give you a quick example on how to get started with Oracle Linux 6 and start using the updates we published on http://public-yum.oracle.com. Download Oracle Linux (without the requirement of a support subscription) from http://edelivery.oracle.com/linux. Install Oracle Linux from the ISO or DVD image Log in as user root Download the yum repo file from http://public-yum.oracle.com # cd /etc/yum.repos.d # wget http://public-yum.oracle.com/public-yum-ol6.repo If you want, you can edit the repo file and enable other repositories, I enabled [ol6_UEK_latest] by just setting enabled=1 in the file with a text editor. Run yum repolist to show the registered channels and you see we are including everything including the latest published RPMs. Now you can just run yum update and any time we release new security errata or bugfix errata for OL6, they will be posted and you will automatically get them. It's very easy, very convenient and actually very cool. We do a lot more than just build OL RPMs and distribute them, we have a very comprehensive test farm where we test the packages extensively.

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• How to setup NX server and client?

  - by javanoob

  I installed NX server on my desktop and able to run it successfully following this tutorial: http://michigantelephone.wordpress.com/2007/10/15/how-to-install-nx-server-and-client-under-ubuntukubuntu-linux/ When i run the command sudo /usr/NX/bin/nxserver –status I am seeing the following output : NX 900 Connecting to server .. NX 110 NX Server is running. NX 999 Bye. It means i have setup NX server correctly.. But on other machine when i open NX client it is asking for hostname..what name should i give there? Every tutorial is explaining about how to install and start NX server but not about how to connect to the server from client.. Could you guys please help me? Thanks in Advance Deter

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• Azure Blob storage defrag

  - by kaleidoscope

  The Blob Storage is really handy for storing temporary data structures during a scaled-out distributed processing. Yet, the lifespan of those data structures should not exceed the one of the underlying operation, otherwise clutter and dead data could potentially start filling up your Blob Storage Temporary data in cloud computing is very similar to memory collection in object oriented languages, when it's not done automatically by the framework, temp data tends to leak. In particular, in cloud computing,  it's pretty easy to end up with storage leaks due to: Collection omission. App crash. Service interruption. All those events cause garbage to accumulate into your Blob Storage. Then, it must be noted that for most cloud apps, I/O costs are usually predominant compared to pure storage costs. Enumerating through your whole Blob Storage to clean the garbage is likely to be an expensive solution. Lokesh, M

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• Does syntax really matter in a programming language?

  - by Saif al Harthi

  One of my professors says "the syntax is the UI of a programming language", languages like Ruby have great readability and it's growing, but we see a lot of programmers productive with C\C++, so as programmers does it really matter that the syntax should be acceptable? I would love to know your opinion on that. Disclaimer: I'm not trying to start an argument. I thought this is a good topic of discussion. Update: This turns out to be a good topic. I'm glad you are all participating in it.

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• What You Said: Your Favorite Windows Customization Tricks

  - by Jason Fitzpatrick

  Earlier this week we asked you to share your favorite Windows customization tricks and now we’re back to highlight some of the tips, tricks, and tweaks you shared. Your customization tips ranged from cosmetic to behind the scenes tweaks and offered a wide variety of ways to customize the Windows experience. Ted Lilley’s favorite must-have tweak involves Windows Explorer: The most fundamental change I make to Windows 7 is to immediately add tabs to Explorer via the QTTabbar add-on. I also add the good old cut/copy/paste/delete/new folder buttons alongside the tabs by installing Classic Shell (I skip Classic Start). Robin sets up virtual desktops: How to Use an Xbox 360 Controller On Your Windows PC Download the Official How-To Geek Trivia App for Windows 8 How to Banish Duplicate Photos with VisiPic

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• creating a simulation game, what type of knowledge is needed? [closed]

  - by Jordan

  I am a beginner in game development. As a part of learning and fun, want to create a game in java-script and html5. I am planning a game that we were used to play in childhood, that is "new business"- a monopoly game, in that we used to buy ,rent,sell places and bank we get some money to play and etc. are features. Its just simple ludo like game. So can anyone suggest me from where to start? what will be the designing? Is it possible to create it only in a html5 and java-script.

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• Computer vision algorithms (how is this possible?)

  - by Maxim Gershkovich

  I recently stumbled across a company that has created what appears to be a computer vision technology that is capable of detecting shoplifting automatically and alert its users. LINK Watching some of the videos and examples provided by the company has left me completely baffled and amazed as to how on earth they may have achieved this functionality. I understand that no-one here will be able to tell me exactly how this may have been achieved but is anyone aware - and could point me to - research in this field or alternatively perhaps provide details as to how something like this could be implemented or guidance of where one might start? My understanding was the computer vision algorithms were many years away from being this sophisticated. Is this sort of application really possible? Anyone willing to hazard a guess at how they achieved this?

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• Announcement: Oracle Solaris 11.1

  - by uwes

  On October 3rd at Oracle OpenWorld John Fowler announced Oracle Solaris 11.1 . This first update to Oracle Solaris 11 increases uptime for the Oracle Database: 8x faster database shutdown and start-up Helps DBAs find and resolve I/O issues increasing performance 1.2x Oracle RAC throughput Oracle Solaris 11.1 drives up network utilization by extending network virtualization to include Edge Virtual Bridging and Data Center Bridging that help manage network bandwidth for high priority services and applications. Learn more and share these valuable tools with your customers to encourage them to deploy Oracle Solaris 11.1 Read Press Release here Oracle Solaris 11.1 Data Sheet (PDF) What's New in Solaris 11.1 Oracle Solaris 11.1 FAQs Join the the online web event Oracle Solaris 11 Innovations for your Data Center on November 7, 2012

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