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• Migrating to Natty (or any other future versions of ubuntu)

  - by Nik

  I am hoping that this question would help other ubuntu users when migrating to a newer version of ubuntu. This should have all the info that they need. So please when you answer try to phrase them into points for easy understanding. I understand that some questions that I ask might have been asked before by other users. In that case just provide the links to those questions. I am running ubuntu 10.10 Maverick Meerkat in case that is important. I can say for sure that a clean install is definitely better than an upgrade since it gives you an opportunity to clean your system and get a fresh start. However some of us like to retain certain software configuration or files etc. The questions are as follows, How do you save the configuration files of certain application like for instance Thunderbird, firefox, etc...so that you can basically paste in the new version of ubuntu? (Thunderbird for instance has all my mail, so I definitely would like to backup its configuration and then use it the new installation that I do) I have some applications like MATLAB and Maple (Based on JAVA) installed. When I migrate, can I just copy the entire installation folder to the new version of ubuntu? Would it still work as now if I do that? When doing a backup which folders should be backed up? Obviously your personal files would be backup. But other than that, is it necessary to back up stuff in the home folder, /usr/bin etc? I have BURG installed. I am guessing that would be erased when I do a clean install along with the program's configuration and everything. How can I do a backup of it? I am dual booting my ubuntu alongside with Windows 7. When I perform the clean install of ubuntu, would GRUB (bootloader) be removed and in anyway jeopardize my windows installation? Over time I have added a lot of PPA which are of course compatible with my current ubuntu version. How do I make a backup of all my PPA and would they be compatible to the newer version of ubuntu when I restore them? I hope this covers all the questions or doubts that a user might face when thinking about performing a clean install of his system. If I missed anything please mention it as a comment and I will add it to my answer.

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• Desparately Need Help: After a mishap, a folder shows 0 files in it

  - by bobby

  I'm hoping some of you guys may be able to shed some light on this scenario: I had a odt document on which I was working from one of many files in a folder among many on an internal hard-drive. Some kind of glitch occured and the document crashed (this could have been some kind of power charge whilst another hard drive was being unmounted). As I looked into the folders surrounding the folder in which my odt document was stored, they start to show 0 files in them. I immediately switched off the PC and then re-started. Upon the re-start, the folders would show the 1,000s of files I've stored in them and then within 5 minutes, as I started to back them up, freeze, cut-off the process of transfer. When I tried to open anything on the internal hard-drive, be it an avi film, an mp3, a cbr or a word doc, they all showed blank or would work. Some folders had vastly less files showing. Eventually, things calmed down. I closed the PC, checked that the connections were in firmly, gave it a vacuum and restarted the PC. All the files eventually showed up and I started to back them up (which I'd brought a hard drive for anyway but been distracted and not done). All folders show except the one which contained the document I was working on at the time of the trouble. Strangely, it was one that should itself full on several occasions on restarts. It shows zero files now. Properties shows zero files and zero space taken by it. Yet when I drop a file into this folder by pasting it in, it disappears too. Opening the folder, there is nothing there. But if I paste that document again, the PC asks would I like to replace the existing file with the same name (that I can't see), when I click yes, the file appears. When I exit, the folder shows the 0 files in the folder. Going back into the folder, it has disappeared again. I'm hoping that someone can help give me tips to recover the files in the folder, it would be greatly, greatly appreciated. All other films, music, comics, documents show and are fine!

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• Things to do After installing Visual Studio Express 12.

  - by Anirudha

  Originally posted on: http://geekswithblogs.net/anirugu/archive/2013/06/25/things-to-do-after-install-visual-studio-express-12.aspx  1. Environment > Document > Check the option for auto-load changes. By checking this option You can modified the file outside the VWD and VWD don’t tell you for confirmation. 2. Environment > Tabs and Windows > Preview Tab > uncheck the solution Explorer option. This option don’t show you the file when you just click on them in solution explorer. 3. Project and solutions > Check the track active item in solution explorer This option help you to easily figure out which file you working on and where it is in solution explorer . 4. text editor > all settings > word wrap > check this feature to enable word wrap 5. Text-editor > Css > formatting > check the compact rule. this option make you file smaller in size and easily to read. 6. Text-editor > html > miscellaneous > uncheck the auto ID option. Actually When you copy paste the html code Visual studio change their ID if ID is already exist. this option disable that feature. This is useful to do when we write if{} else {} statement and this is not helpful on that case. 7. Package manager > General > browse > copy the location of cache folder and in package source add them as source. This way you can use package that you have use earlier when you are offline. Thanks for read my post

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• Unable to boot into 11.10 in normal (get a black screen) OR recovery (get just a flashing cursor, no cli)

  - by user1092284

  Okay, so I had a dual boot of Tango Studio (based on Ubuntu 10.04) and Windows XP. Yesterday I downloaded the .iso for Ubuntu 11.10 and attempted to install from a USB (my BIOS won't normally boot from USB but I had PLOP boot manager on a CD). I booted up Ubuntu from the USB and then from there formatted the partition with Tango on and installed Ubuntu 11.10. On booting up I came into Grub rescue mode. So I booted up from the USB again and used boot-repair to reinstall Grub. After this I would see the normal Grub menu, but on choosing Ubuntu I would come to a black screen. On choosing recovery mode it would begin starting normally with no obvious errors but instead of coming to a cli I would just get a blank screen with a flashing cursor on the top left, not accepting any input. I have since reformatted and reinstalled from a CD rather than USB and had the exact same problem. I used boot-repair again and the result is the same. Output of the most recent boot-repair is at http://paste.ubuntu.com/869805/ I have also tried editing the ubuntu grub entry and replacing quiet with text nomodeset as I saw in an answer to another question. This got me a bit further - I saw the purple ubuntu loading screen but still came to a blank screen after that. Anyway, in most of the other questions in which that is brought up the user is still able to boot into recovery, while I am not. Can anyone help? Thanks in advance, let me know if there's any more info I need to provide! EDIT FOR MORE INFO: I read something saying it's quiet splash that should be replaced with nomodeset. Earlier I had left splash in the line. So i tried it this way and it froze after displaying the following text: fsck from util-linux 2.19.1 mountall: Plymouth command failed mountall: Disconnected from Plymouth /dev/sda5:clean, 139359/1741488 files, 745830/6961125 blocks From a bit of googling it doesn't look like plymouth is essential, but I've checked and I do have the most current versions of mountall and plymouth installed so I don't know why there's a problem EDIT FOR MORE INFO AGAIN: I used dkpg --reconfigure plymouth cause I saw it mentioned in another forum and it still says plymouth command failed on boot

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• Making CopySourceAsHtml add-on work with VS2010

  - by DigiMortal

  As there are still bloggers who use CopySourceAsHtml add-on for Visual Studio to get syntax highlighted code to their blog posts and there is no guidance in CSAH site how to make it work with Visual Studio 2010 I will give my guidance here. Almost all code in this blog is syntax highlighted by this add-on (read more from my post Visual Studio add-in: CopySourceAsHTML). Last version of CSAH is available for VS2008 but it is easy to make it work with VS2010. Just follow these steps. Close VS2010 if it is opened. Goto folder MyDocuments\Visual Studio 2010. Move to AddIns subfolder (create it if there is no such subfolder). Create file called CopySourceAsHtml.AddIn and open it in text editor. Paste the following XML to editor:   <?xml version="1.0" encoding="utf-8" standalone="no"?> <Extensibility xmlns="http://schemas.microsoft.com/AutomationExtensibility"> <HostApplication> <Name>Microsoft Visual Studio Macros</Name> <Version>10.0</Version> </HostApplication> <HostApplication> <Name>Microsoft Visual Studio</Name> <Version>10.0</Version> </HostApplication> <Addin> <FriendlyName>CopySourceAsHtml</FriendlyName> <Description>Adds support to Microsoft Visual Studio 2010 for copying source code, syntax highlighting, and line numbers as HTML.</Description> <Assembly>JTLeigh.Tools.Development.CopySourceAsHtml, Version=3.0.3215.1, Culture=neutral, PublicKeyToken=bb2a58bdc03d2e14, processorArchitecture=MSIL</Assembly> <FullClassName>JTLeigh.Tools.Development.CopySourceAsHtml.Connect</FullClassName> <LoadBehavior>1</LoadBehavior> <CommandPreload>0</CommandPreload> <CommandLineSafe>0</CommandLineSafe> </Addin> </Extensibility> Save file and close it. Run VS2010 and activate add-on if it is not activated yet. That’s it. If you are heavy user of CSAH then I recommend you to bookmark this post. :)

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• How to do proper Alpha in XNA?

  - by Soshimo

  Okay, I've read several articles, tutorials, and questions regarding this. Most point to the same technique which doesn't solve my problem. I need the ability to create semi-transparent sprites (texture2D's really) and have them overlay another sprite. I can achieve that somewhat with the code samples I've found but I'm not satisfied with the results and I know there is a way to do this. In mobile programming (BREW) we did it old school and actually checked each pixel for transparency before rendering. In this case it seems to render the sprite below it blended with the alpha above it. This may be an artifact of how I'm rendering the texture but, as I said before, all examples point to this one technique. Before I go any further I'll go ahead and paste my example code. public void Draw(SpriteBatch batch, Camera camera, float alpha) { int tileMapWidth = Width; int tileMapHeight = Height; batch.Begin(SpriteSortMode.Texture, BlendState.AlphaBlend, SamplerState.PointWrap, DepthStencilState.Default, RasterizerState.CullNone, null, camera.TransformMatrix); for (int x = 0; x < tileMapWidth; x++) { for (int y = 0; y < tileMapHeight; y++) { int tileIndex = _map[y, x]; if (tileIndex != -1) { Texture2D texture = _tileTextures[tileIndex]; batch.Draw( texture, new Rectangle( (x * Engine.TileWidth), (y * Engine.TileHeight), Engine.TileWidth, Engine.TileHeight), new Color(new Vector4(1f, 1f, 1f, alpha ))); } } } batch.End(); } As you can see, in this code I'm using the overloaded SpriteBatch.Begin method which takes, among other things, a blend state. I'm almost positive that's my problem. I don't want to BLEND the sprites, I want them to be transparent when alpha is 0. In this example I can set alpha to 0 but it still renders both tiles, with the lower z ordered sprite showing through, discolored because of the blending. This is not a desired effect, I want the higher z-ordered sprite to fade out and not effect the color beneath it in such a manner. I might be way off here as I'm fairly new to XNA development so feel free to steer me in the correct direction in the event I'm going down the wrong rabbit hole. TIA

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• Best language on Linux to replace manual tasks that use SSH/Telnet? [on hold]

  - by Calab

  I've been tasked to create and maintain a web browser based interface to replace several of the manual tasks that we perform now. I currently have a "shakey" but working program written in Perl (2779 lines) that uses basic Expect coding, but it has some limitations that require a great deal of coding to get around. Because of this I am going to do a complete rewrite and want to do it "right" this time. My question is this... What would be the best language to use to create a web based interface to perform SSH/Telnet tasks that we would normally do manually? Keep in mind the following requirements: Runs on a CentOS Linux system v5.10 Http will be served by Apache2 This is an INTRANET site and only accessible within our organization. User load will be light. No more that 5 users accessing it at one time. perl 5.8.8, php 5.3.3, python 2.7.2 are available... Not sure what other languages to check for, or what modules might be installed in each language. The web interface will need to provide progress indicators and text output produced by the remote connection, in real time as it is generated. If we are running our process on multiple hosts, they should be in individual threads so that they can run side by side, not sequentially. I want the ability to "trap" on specific text generated by the remote host and display an alert to the user - such as when the remote host generates an error message. I would like to avoid as much client side scripting (javascript/vbscript) as I can. Most users will be on Windows PC's using Chrome or IE as a browser. Users will be downloading the resulting output so they can process it as they see fit. I currently have no experience with "Ajax" or the like. Most of my coding experience is old 6809 assembly, Visual Basic 6, and whatever I can cut/paste from online examples in various languages (hence my "shaky" Perl program) My coding environment is Eclipse for remote code editing, but I prefer stuff like UltraEdit if I can get a decent syntax file for the language I'm using. I do have su access on the server, but I'm not the only one using this server so I can't just upgrade/install blindly as I might impact other software currently running on the machine. One reason that I'm asking here, instead of searching (which I did) is that most replies were, "use language 'xyz', but you need to use an external SSH connection" - like I'm using Expect in my Perl script. Most also did not agree on what language that 'xyz' should be. ...so, after this long posting, can someone offer some advice?

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• A Windows Update Prevented Live Discs From Working? [migrated]

  - by user88311

  First off I'll state my system specs. Acer Aspire M1100 Windows Vista Home Basic 32bit OEM 2 Gigs of DDR2 ram 160Gig hard drive 2.7Ghz AMD Athlon 64 processor ATI Radeon X1250 Graphics card A few days ago my computer did automatic updates and updated windows defender to KB915597 (Definition 1.135.415.0), After which when shutting down and starting up I would receive BSOD with the information BUGCODE_USE_DRIVER and 0x000000FE (0x00000008, 0x00000006, 0x00000006, 0x877330000) upon where my computer would not start up with any USB devices plugged in and it always require me to run startup repair before it started. Upon when I first started it up and was able to fully boot windows, I had no use of the mouse so I was unable to install the fix that the windows solutions center brought up on my screen, so I restarted again and installed the fix hoping it would cease the problem, it did not. Upoon starting up after installing the fix and restarting I was confronted with the BSOD 0x000000FE (0x00000008, 0x00000006, 0x00000006, 0x83291000) at which I found the startup repair could not fix the problem and I restored, as I most like should have in the first place. After going through that I read that simply installing the latest defender version from the microsoft site had fixed this problem for others, so I did that, to find I still received the BSOD's. So in a attempt to find a fix to the problem I went to the microsoft answers site to try to find a way to fix the problem, there I was told to simply disable defender and reboot to see if that fixed the problem, upon doing this my computer would no longer even startup, when I boot normally I get to just when the loading screen finishes and then my computer restarts and when I run startup repair, it runs for about 15 seconds and then my computer restarts as well. I have tried running ubuntu live discs in order to simply access the drive and simply copy and paste the 2 month old physical backup I have of my C drive to the C drive, but whenever I run the live OS when it gets to the end of the load screen and is about to boot, the computer again restarts, yet if I put in a gparted disc, I am able to boot it fully, although it does not give me access to the file system just partition managing and when I attempt to access the internet through it, the computer once again restarts. So my question is, how could the update and what has happened prevent me from running the live OS's properly?

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• laptop will not boot after attempting upgrade to 13.10

  - by naerwenya

  I wanted to update my OS to the new 14.04 LTS. I was running 12.04 LTS before and followed the advice that upgrades should be done in steps. I first upgraded to 12.10, which seemed to work fine, and later to 13.10. This was all done through the Software Manager. After the last upgrade, I am no longer able to boot up my computer. The GNU GRUB menu opens up, but after selecting Ubuntu, it just stalls with a blank purple screen. If I select one of the other kernels, it also stalls after "Loading initial ramdisk...". I can't get into the Recovery Menu, either. I'm still rather new to Linux and may have possibly made the situation worse. Unfortunately, nothing has worked yet. I tried reinstalling from a flash drive and on my first attempt, the wizard recognised a previous installation. Unfortunately, the wizard also didn't like how my partitions were set up (I didn't change anything) and gave an error before closing. Unfortunately, I didn't write the error down, but it was about the boot partition. On the next attempt and ever since, the installation wizard has stated that "This computer currently has no detected operating systems." This is strange, because I could see the disk and even access my files when booting up from the USB. At this point, I decided to back up my important files using dropbox. Before losing all my files, I wanted to try the Boot-Repair tool, which also produced no results, and the files are no longer visible when booting from USB. The link to the Boot-Repair log is at http://paste.ubuntu.com/7457249/. If I then proceed through to the "Something else" installation option, I can see that the partitions still exist. This is what they look like: /dev/sda free space (size indicated 1MB) /dev/sda1 efi (33MB of 98 MB used) /dev/sda2 efi (352634MB of 746330MB used) /dev/sda3 swap (3725MB, none used) free space (0MB) Is there any way I might be able to get my computer to work and preserve my files as well?

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• LWJGL: Camera distance from image plane?

  - by Rogem

  Let me paste some code before I ask the question... public static void createWindow(int[] args) { try { Display.setFullscreen(false); DisplayMode d[] = Display.getAvailableDisplayModes(); for (int i = 0; i < d.length; i++) { if (d[i].getWidth() == args[0] && d[i].getHeight() == args[1] && d[i].getBitsPerPixel() == 32) { displayMode = d[i]; break; } } Display.setDisplayMode(displayMode); Display.create(); } catch (Exception e) { e.printStackTrace(); System.exit(0); } } public static void initGL() { GL11.glEnable(GL11.GL_TEXTURE_2D); GL11.glShadeModel(GL11.GL_SMOOTH); GL11.glClearColor(0.0f, 0.0f, 0.0f, 0.0f); GL11.glClearDepth(1.0); GL11.glEnable(GL11.GL_DEPTH_TEST); GL11.glDepthFunc(GL11.GL_LEQUAL); GL11.glMatrixMode(GL11.GL_PROJECTION); GL11.glLoadIdentity(); GLU.gluPerspective(45.0f, (float) displayMode.getWidth() / (float) displayMode.getHeight(), 0.1f, 100.0f); GL11.glMatrixMode(GL11.GL_MODELVIEW); GL11.glHint(GL11.GL_PERSPECTIVE_CORRECTION_HINT, GL11.GL_NICEST); } So, with the camera and screen setup out of the way, I can now ask the actual question: How do I know what the camera distance is from the image plane? I also would like to know what the angle between the image plane's center normal and a line drawn from the middle of one of the edges to the camera position is. This will be used to consequently draw a vector from the camera's position through the player's click-coordinates to determine the world coordinates they clicked (or could've clicked). Also, when I set the camera coordinates, do I set the coordinates of the camera or do I set the coordinates of the image plane? Thank you for your help. EDIT: So, I managed to solve how to calculate the distance of the camera... Here's the relevant code... private static float getScreenFOV(int dim) { if (dim == 0) { float dist = (float) Math.tan((Math.PI / 2 - Math.toRadians(FOV_Y))/2) * 0.5f; float FOV_X = 2 * (float) Math.atan(getScreenRatio() * 0.5f / dist); return FOV_X; } else if (dim == 1) { return FOV_Y; } return 0; } FOV_Y is the Field of View that one defines in gluPerspective (float fovy in javadoc). This seems to be (and would logically be) for the height of the screen. Now I just need to figure out how to calculate that vector.

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• IXRepository and test problems

  - by Ridermansb

  Recently had a doubt about how and where to test repository methods. Let the following situation: I have an interface IRepository like this: public interface IRepository<T> where T: class, IEntity { IQueryable<T> Query(Expression<Func<T, bool>> expression); // ... Omitted } And a generic implementation of IRepository public class Repository<T> : IRepository<T> where T : class, IEntity { public IQueryable<T> Query(Expression<Func<T, bool>> expression) { return All().Where(expression).AsQueryable(); } } This is an implementation base that can be used by any repository. It contains the basic implementation of my ORM. Some repositories have specific filters, in which case we will IEmployeeRepository with a specific filter: public interface IEmployeeRepository : IRepository<Employee> { IQueryable<Employee> GetInactiveEmployees(); } And the implementation of IEmployeeRepository: public class EmployeeRepository : Repository<Employee>, IEmployeeRepository // TODO: I have a dependency with ORM at this point in Repository<Employee>. How to solve? How to test the GetInactiveEmployees method { public IQueryable<Employee> GetInactiveEmployees() { return Query(p => p.Status != StatusEmployeeEnum.Active || p.StartDate < DateTime.Now); } } Questions Is right to inherit Repository<Employee>? The goal is to reuse code once all implementing IRepository already been made. If EmployeeRepository inherit only IEmployeeRepository, I have to literally copy and paste the code of Repository<T>. In our example, in EmployeeRepository : Repository<Employee> our Repository lies in our ORM layer. We have a dependency here with our ORM impossible to perform some unit test. How to create a unit test to ensure that the filter GetInactiveEmployees return all Employees in which the Status != Active and StartDate < DateTime.Now. I can not create a Fake/Mock of IEmployeeRepository because I would be testing? Need to test the actual implementation of GetInactiveEmployees. The complete code can be found on Github

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• SQL Server 2008 R2 Quiet Installation Failure

  - by pk

  I've downloaded the SQL Server 2008 R2 software from Microsoft and am working on scripting a silent installation. I'm getting the following errors (and the duplicate paste job is not an accident, that's how it shows up for me) The following error occurred: Exception has been thrown by the target of an invocation. Error result: 1152035024 Result facility code: 1194 Result error code: 43216 Please review the summary.txt log for further details The following error occurred: Exception has been thrown by the target of an invocation. Error result: 1152035024 Result facility code: 1194 Result error code: 43216 Please review the summary.txt log for further details Microsoft (R) SQL Server 2008 R2 Setup 10.50.1600.01 This is what shows up in the detailed SQL install log. 2011-02-23 09:53:13 Slp: Running Action: ExecuteInitWorkflow 2011-02-23 09:53:13 Slp: Workflow to execute: 'INITIALIZATION' 2011-02-23 09:53:13 Slp: Error: Action "Microsoft.SqlServer.Configuration.BootstrapExtension.ExecuteWorkflowAction" threw an exception during execution. 2011-02-23 09:53:13 Slp: Microsoft.SqlServer.Setup.Chainer.Workflow.ActionExecutionException: Exception has been thrown by the target of an invocation. ---> System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.ArgumentNullException: Value cannot be null. 2011-02-23 09:53:13 Slp: Parameter name: InstallMediaPath Hopefully someone can help me work through this. Here is a simple version of my PowerShell code. $arguments = @() $arguments += "/q" $arguments += "/ACTION=Install" $arguments += "/FEATURES=SQL,Tools" $arguments += "/INSTANCENAME=MSSQLSERVER" $arguments += "/SQLSVCACCOUNT=`"$NetBIOSDomainName\$SQLServerServiceAccount`"" $arguments += "/SQLSVCPASSWORD=`"$SQLServerServiceAccountPassword`"" $arguments += "/SQLSYSADMINACCOUNTS=`"$NetBIOSDomainName\$SQLSysAdminAccount`"" $arguments += "/AGTSVCACCOUNT=`"$NetBIOSDomainName\$SQLServerAgentAccount`"" $arguments += "/IACCEPTSQLSERVERLICENSETERMS" Start-Process "$SQLServerSetupLocation\setup.exe" -Wait -ArgumentList $arguments -RedirectStandardOutput error.txt

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• Adaptec 6405 RAID controller turned on red LED

  - by nn4l

  I have a server with an Adaptec 6405 RAID controller and 4 disks in a RAID 5 configuration. Staff in the data center called me because they noticed a red LED was turned on in one of the drive bays. I have then checked the status using 'arcconf getconfig 1' and I got the status message 'Logical devices/Failed/Degraded: 2/0/1'. The status of the logical devices was listed as 'Rebuilding'. However, I did not get any suspicious status of the affected physical device, the S.M.A.R.T. setting was 'no', the S.M.A.R.T. warnings were '0' and also 'arcconf getsmartstatus 1' returned no problems with any of the disk drives. The 'arcconf getlogs 1 events tabular' command gives lots of output (sorry, can't paste the log file here as I only have remote console access, I could post a screenshot though). Here are some sample entries: eventtype FSA_EM_EXPANDED_EVENT grouptype FSA_EXE_SCSI_GROUP subtype FSA_EXE_SCSI_SENSE_DATA subtypecode 12 cdb 28 00 17 c4 74 00 00 02 00 00 00 00 data 70 00 06 00 00 00 00 00 00 00 00 00 02 00 00 00 00 00 00 00 00 00 00 00 00 0 The 'arcconf getlogs 1 device tabular' command reports mediumErrors 1 for two of the disks. Today, I have checked the status of the controller again. Everything is back to normal, the controller status is now 'Logical devices/Failed/Degraded: 2/0/0', the logical devices are also all back to 'Optimal'. I was not able to check the LED status, my guess is that the red LED is off again. Now I have a lot of questions: what is a possible cause for the medium error, why it is not reported by the SMART log too? Should I replace the disk drives? They were purchased just a month ago. The rebuilding process took one or two days, is that normal? The disks are 2 TByte each and the storage system is mostly idling. the timestamp of the logs seem to show the moment of the log retrieval, not the moment of the incident. Please advise, all help is very appreciated.

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• Issues with ProxyPass and ProxyPassReverse when proxying to localhost and a different TCP port

  - by mbrownnyc

  I am attempting to use ProxyPass and ProxyPassReverse to proxy requests through Apache to another server instance that is bound to the localhost on a different TCP port that the Vhost exists (VHost is bound to :80, when the target is bound to :5000). However, I am repeatedly receiving HTTP 503 when accessing the Location. According to the ProxyPass documentation... <VirtualHost *:80> ServerName apacheserver.domain.local DocumentRoot /var/www/redmine/public ErrorLog logs/redmine_error <Directory /var/www/redmine/public> Allow from all Options -MultiViews Order allow,deny AllowOverride all </Directory> </VirtualHost> PassengerTempDir /tmp/passenger <Location /rhodecode> ProxyPass http://127.0.0.1:5000/rhodecode ProxyPassReverse http://127.0.0.1:5000/rhodecode SetEnvIf X-Url-Scheme https HTTPS=1 </Location> I have tested binding the alternate server to the interface IP address, and the same issue occurs. The server servicing request is an instance of python paste:httpserver, and it has been configured to use the /rhodecode suffix (as I saw this to be mentioned in other posts about ProxyPass). The documentation from the project itself, Rhodecode, reports to use the above. The issue is persistent if I target another server that is serving on a different port. Does ProxyPass allow proxying to a different TCP port? [update] I won't delete this, in case someone comes across the same issue. I had set an ErrorLog, and in that ErrorLog the following error was reported: [Wed Nov 09 11:36:35 2011] [error] (13)Permission denied: proxy: HTTP: attempt to connect to 127.0.0.1:5000 (192.168.100.100) failed [Wed Nov 09 11:36:35 2011] [error] ap_proxy_connect_backend disabling worker for (192.168.100.100) After some more research, I attempted to set SELinux to permissive (echo 0 >/selinux/enforce), and try again. It turns out the SELinux boolean httpd_can_network_connect must be set to 1. For persistence on reboot: setsebool -P httpd_can_network_connect=1

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• Useful Excel keyboard shortcuts

  - by Ben Lings

  What keyboard shortcuts do you use in Excel? Things I've discovered recently and found very useful are: Shift + Space - select the current row Ctrl + Space - select the current column Ctrl + Shift + Space - select the block of contiguous cell Ctrl + + - Insert (as in the context menu). If the current row is selected, will insert a new row. Ctrl + - - Delete (as in the context menu). If the current row is selected, will delete entire row. What (apart from the normal cut, copy, paste, etc) do you use? Ctrl + 1 to open the Format dialog. Shift + F2 to add/edit a cell comment. Shift + F2, followed by Esc to select the current cell comment, which can then be moved around with the arrow keys (????) or deleted by pressing Del. Ctrl + ???? to move to the last non-blank cell in a series. This is usually the edge of a table, but not if you have blank cells in the path. Pressing End followed by an arrow key does the same thing. Alt + F11 to open the VBA editor. Alt + = to start a SUM() formula and go straight to selecting cells to be summed. Ctrl + G or F5 to jump to a cell by typing its coordinates (e.g. C3) Ctrl + Home to jump to the top left, usually A1 unless you you are in a frozen split view, in which case it will jump to the top left of the "data" area. Ctrl + ; and Ctrl + Shift + ; to insert the current date and time, respectively. I know Ben Lings already posted this one, but I find it indispensable.

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• Why isn't the scripts in my autoload folder being executed in Vim?

  - by Codemonkey

  I'm trying to use Pathogen to manage my Vim extensions. My bundle folder looks like this: .../bundle/ +-- vim-pathogen ¦   +-- autoload ¦   +-- pathogen.vim +-- vim-smoothscroll +-- autoload +-- smooth_scroll.vim And my vimrc file includes this: let s:root = fnamemodify(resolve(expand(":p")), ":h") " Initiate pathogen. exec "source " . s:root . "/vimfiles/bundle/vim-pathogen/autoload/pathogen.vim" exec pathogen#infect() My vimrc file is a symlink located in ~ but pointing to a folder inside my Dropbox folder. This appears to work when I start Vim. Pathogen has added vim-smoothscroll to my runtimepath: :set runtimepath? runtimepath=~/Dropbox/Personal/config_sync/vim/vimfiles,~/Dropbox/Personal/config_sync/vim/vimfiles/bundle/vim-p athogen,~/Dropbox/Personal/config_sync/vim/vimfiles/bundle/vim-smoothscroll,~/.vim,~/vim/share/vim/vimfiles,~/vim/ share/vim/vim74,~/vim/share/vim/vimfiles/after,~/.vim/after The problem is that the script smooth_scroll.vim hasn't been loaded: 1: ~/.vimrc 2: ~/Dropbox/Personal/config_sync/vim/vimfiles/bundle/vim-pathogen/autoload/pathogen.vim 3: ~/vim/share/vim/vim74/syntax/syntax.vim 4: ~/vim/share/vim/vim74/syntax/synload.vim 5: ~/vim/share/vim/vim74/syntax/syncolor.vim 6: ~/vim/share/vim/vim74/filetype.vim 7: ~/vim/share/vim/vim74/menu.vim 8: ~/vim/share/vim/vim74/autoload/paste.vim 9: ~/Dropbox/Personal/config_sync/vim/vimfiles/colors/codeschool.vim 10: ~/Dropbox/Personal/config_sync/vim/_vimrc_gui 11: ~/Dropbox/Personal/config_sync/vim/_vimrc_keybinds 12: ~/vim/share/vim/vim74/plugin/getscriptPlugin.vim 13: ~/vim/share/vim/vim74/plugin/gzip.vim 14: ~/vim/share/vim/vim74/plugin/matchparen.vim 15: ~/vim/share/vim/vim74/plugin/netrwPlugin.vim 16: ~/vim/share/vim/vim74/plugin/rrhelper.vim 17: ~/vim/share/vim/vim74/plugin/spellfile.vim 18: ~/vim/share/vim/vim74/plugin/tarPlugin.vim 19: ~/vim/share/vim/vim74/plugin/tohtml.vim 20: ~/vim/share/vim/vim74/plugin/vimballPlugin.vim 21: ~/vim/share/vim/vim74/plugin/zipPlugin.vim 22: ~/vim/share/vim/vim74/syntax/ruby.vim 23: ~/vim/share/vim/vim74/syntax/vim.vim 24: ~/vim/share/vim/vim74/syntax/python.vim Why is that? Loading the script manually works fine.

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• Why Hebrew letters in the address bar break the ARR gateway (Only With Explorer 8,9,10)?

  - by Noamway

  The ARR is working great in all browsers except Internet Explorer 8,9,10. When I paste Hebrew URL directly to the address bar it's working good, but when I surf (click on a simple href URL) from one Hebrew URL page to another Hebrew URL the ARR return me that error: "502 - Web server received an invalid response while acting as a gateway or proxy server." There is a problem with the page you are looking for, and it cannot be displayed. When the Web server (while acting as a gateway or proxy) contacted the upstream content server, it received an invalid response from the content server. I checked it number of times including with HTTP analyzer and I saw that the "referer" is making all the problems and cause to that error. For example when I enter to that page: mydomain.com/somehebrewchars (mydomain.com/???? you will need Hebrew install) And click in the page on a link to: mydomain.com/somehebrewchars2 (mydomain.com/???????? you will need Hebrew install) I will get the error above and when you look at the referrer you will see something like that: mydomain.com/עמוד-× ×—×™×ª×” We use other proxies application to others projects and we don't have the same issue like that. For this example we used WIN 2008 and 2012 with ARR 2.5 and also 3 beta. Any help is welcome :-) Thanks, Noam

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• IIS 7.5 Basic authorization issue

  - by Alsin

  When I log on using correct user name\password (I always copy-paste them) I get 401.1 error. User name and password are correct (user is created on server locally, not a domain one). I can run program as this user (runas /noprofile /user:tmp notepad.exe). Basic authorization's default domain is a server name, realm is empty. I've saved FailedReqLogFile. AUTH_BASIC_LOGON_FAILED shows ErrorCode="Logon failure: unknown user name or bad password. (0x8007052e)" and MODULE_SET_RESPONSE_ERROR_STATUS shows ModuleName="BasicAuthenticationModule", Notification="AUTHENTICATE_REQUEST", HttpStatus="401", HttpReason="Unauthorized", HttpSubStatus="1", ErrorCode="Logon failure: unknown user name or bad password. (0x8007052e)", ConfigExceptionInfo="" And one more thing - if I use my domain login\password it woks! Basic Authentications is only enabled authentication in application... Could you please suggest me how I can troubleshoot and fix this issue? Maybe somebody hit it before... Best regards, Alex UPDATE: I get 401.1 when I trying to access site from local host. I can actually access files from remote host.

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• Nginx + uWSGI on a fresh Ubuntu install - bind error port 80

  - by knuckfubuck

  I know this is a common problem usually having to do with apache or another service already running on port 80 and I have done a lot of searching and running netstat and still have not figured out why I am getting this error. I rebuilt my slice, did a fresh install of Ubuntu 10.04 and setup nginx + uwsgi. It worked and I was able to see my Django site. I then installed Postgres8.4 and the rest of the stack needed for Geodjango from this link. After that was done I tried to restart nginx and I get this error: sudo /etc/init.d/nginx start Starting nginx: the configuration file /usr/local/nginx/conf/nginx.conf syntax is ok configuration file /usr/local/nginx/conf/nginx.conf test is successful [emerg]: bind() to 0.0.0.0:80 failed (98: Address already in use) [emerg]: bind() to 0.0.0.0:80 failed (98: Address already in use) [emerg]: bind() to 0.0.0.0:80 failed (98: Address already in use) [emerg]: bind() to 0.0.0.0:80 failed (98: Address already in use) [emerg]: bind() to 0.0.0.0:80 failed (98: Address already in use) [emerg]: still could not bind() I have nginx set to listen 80. Here's an output from netstat -l --numeric-ports | grep 80: tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN tcp 0 0 127.0.0.1:8000 0.0.0.0:* LISTEN Output from sudo lsof +M -i4: nginx 2330 root 8u IPv4 3195 0t0 TCP *:www (LISTEN) nginx 2331 www-data 8u IPv4 3195 0t0 TCP *:www (LISTEN) uwsgi 2335 s 4u IPv4 3259 0t0 TCP localhost:8000 (LISTEN) uwsgi 2352 s 4u IPv4 3259 0t0 TCP localhost:8000 (LISTEN) uwsgi 2353 s 4u IPv4 3259 0t0 TCP localhost:8000 (LISTEN) uwsgi 2354 s 4u IPv4 3259 0t0 TCP localhost:8000 (LISTEN) uwsgi 2355 s 4u IPv4 3259 0t0 TCP localhost:8000 (LISTEN) Anyone have any other ideas how I can figure out what is blocking port 80? edit Paste of my /etc/init.d/nginx script here: http://dpaste.com/hold/400937/

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• Virtual Machines Renaming/Backing up/Sharing

  - by evan

  I've started using VMware virtual machines for all of my software development projects and have a few questions for others doing the same thing. First, how can you rename the virtual machine and the name of the virtual hard drive? I have a base development machine that I clone for different projects. I'd like to name the machine and it's hard drive according the the project (right now when I copy them via cut and paste, the file names remain the same and I can only organize them by putting them in a specific directory). Second, what is the best way to back up a virtual machine? Is it possible (by breaking the virtual hard drive up into chunks instead of one big file) to get incremental backups working? It seems time machine always tries to make a copy of the whole thing which is time consuming because each virtual machine is around 30GB. Finally, how slow would it be to have a virtual machine shared on an NFS mount on a wireless N network and used from multiple computers (but with only one person using it at a time.) Would it be more reasonable on a gigabit lan connection? Thanks for your input! And please feel free to share any advice or wisdom about using virtual machines for software development and the best ways to speed them up!

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• nginx 301 redirect to subfolder on primary domain

  - by 187j3x1

  hello there, sorry for my poor english. i just set up wordpress on my vps, so far its the only item on my site. there for seo reason, i think is better redirect all primary domain to the blog folder. primary domain is example.com wordpress is at example.com/blog what i want is rewrite www.example.com and example.com to example.com/blog. googled got some scripts, and make some change paste into nginx config file. here is: #301 redirect www to non-www server { server_name www.example.com; location = / { rewrite ^/(.*) http://example.com/$1 permanent; } } #301 non-www to subfolder server { server_name example.com; location = / { rewrite ^/(.*) http://example.com/blog$1 permanent; } } it works at some degree, successfully redirect to example.com/blog. the only problem is i get 404 not found error. then i only make nginx redirect www to example.com/blog. ok, this time i can access blog page. i know there is something wrong in the non-www to subfolder script. but do not how to fix it :(

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• How to configure a Router (TL-WR1043ND) to work in WDS mode?

  - by LanceBaynes

  I have a WRT160NL router (192.168.1.0/24 - OpenWrt 10.04) as AP. It's: - WAN port: connected to the ISP - WLAN: working as an AP, using 64 bit WEP/SSID: "MYWORKINGSSID", channel 5, using password: "MYPASSWORDHERE" - It's IP Address is: 192.168.1.1 Ok! It's working great! But: I have a TL-WR1043ND router that I want to configure as a "WDS". (My purpose is to extend the wireless range of the original WRT160NL.) Here is how I configure the TL-WR1043ND: 1) I enable WDS bridging. 2) In the "Survey" I select my already working network. 3) I set up the encryption (exact same like the already working one) 4) I choose channel 5 5) I type the SSID 6) I disable the DHCP server on it. After I reboot the router and connect to this router (TL-WR1043ND) over wireless I'm trying to ping google.com. From the ping I see that I can reach this router, that's ok, but it seems like that this router can't connect to the original one, the WRT160NL (so I don't get ping reply from Google). The encryption settings/password is good I checked it many-many-many times. what could be the problem? I'm thinking it could be a routing problem, but what should I add to the "Static Routing" menu? I tried to change the IP address of the TL-WR1043ND to: 192.168.1.2 So if this a routing issue then I should add a static routing rule that says: If destination: any then forward the packet to 192.168.1.1 p.s.: I updated the Firmware to the latest version. It's still the same. p.s.2: The HW version of the TL-WR1043ND is 1.8 p.s.3: Could that be the problem that I use different routers? (If I would buy.. another TL-WR1043ND and use it instead of the WRT160NL, and with normal Firmware, not OpenWrt, then it would work?? The "WDS" is different on different routers?) p.s.4: I will try to check the router logs@night - and paste it here! :\

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• Time drift in Cloud Server - need to mainpulate GRUB config

  - by Aditya Advani

  We are hosting a VPS on a popular host and are experiencing a regular time drift of several minutes a day forward (approx 7). Linux Kernel: 2.6.18-164.11.1.el5 GNU/Linux Distro: CentOS release 5.4 (Final) We reached out to our hosting provider and their support advised us " This is a known issue with Cloud Servers. To fix this you will need to add one line to your grub config located at: /boot/grub/menu.lst The line you need to add is: noapic nolapic divider=10 nolapic_timer This should correct this issue. You will need to restart after this is added in. " Because I am wary of manipulating grub, mostly I'm terrified that our server may fail to restart - I ask you guys, the pro *nix admins - where exactly in this file does the recommended insertion below: # line from 1&1 for time syncing issue (Case 5163) noapic nolapic divider=10 nolapic_timer go? Please specify where exactly, and whether the order of commands is or is not important. Why is the block below "title CentOS ..." indented? If someone could give me an overview of how this works or point me to a resource that's easy to follow, that's what I'm looking for immediately, a light overview or basic understanding of what I;m doing. If GRUB and bootloaders are a deep dark treasure trove of kernel hacking or something, that's great well-recommended in-depth resources are also very welcome. This is my current /boot/grub/menu.lst # grub.conf generated by anaconda # # Note that you do not have to rerun grub after making changes to this file #boot=/dev/sda # serial --unit=0 --speed=57600 terminal --timeout=5 serial console timeout=5 title CentOS (2.6.18-164.11.1.el5) root (hd0,0) kernel /boot/vmlinuz-2.6.18-164.11.1.el5 ro root=/dev/hda1 console=tty0 console=tty initrd /boot/initrd-2.6.18-164.11.1.el5.img MOST IMPORTANT: I need to know where in the file above it is appropriate to paste the suggested line so I can confidently restart my VPS after manipulating GRUB config

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• compose-key mappings differ between gtk and qt apps

  - by intuited

  I'm noticing that there is an inconsistency in the output of one of the compose-key combos. When I type ( [Compose] . . ) under Chrome, gedit, gnome-terminal, or roxterm I get the character '?'. This is a small raised dot: $ echo -n '?' | xxd 0000000: cb99 .. When I type the same combo under konsole, yakuake, or kate, I get the character '…'. This is an ellipsis: $ echo -n '…' | xxd 0000000: e280 a6 ... This is not a font issue: if I copy-paste the characters from an app using one toolkit to an app using the other, its appearance is maintained. I use a few other combos pretty regularly and they seem to work consistently across toolkits. I think this is a pretty recent phenomenon. I upgraded from Ubuntu 8.10 to 9.10 fairly recently so this might be related. I'm not sure if this will reoccur if I restart X, and I'd rather not find out. Can someone explain how this is possible, and what I can do to resolve it? I'd like to have the ellipsis appear in all apps when that combo is entered.

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• Black Screen and System Hang - Possibly CPU overheating

  - by Mahesh

  I have this old computer - P4 2.0ghz, 1.2GB RAM and onboard graphics(no external card), 80GBHDD. It has xubuntu installed on it and it regularly hangs when it takes more system resources for say like graphical programs, too many tabs on firefox etc. It just either hangs the system or shows black screen. Tested if it was issue of HD but it wasn't because i have used linux livecd and problem is still the same even if I have removed the HD. I have also tested with USB linux (puppy linux and ubuntu linux on 8gb drives). Tested windows XP as well on this HD and results are the same. Tested another HD on this machine, results are still the same with it. System hangs or goes black screen and requires restart. I thought later it could be thermal heat issue and then applied thermal paste on heatsink but still it fails to work for me. It continues to show symptoms. Another thing which was yet to be tested is changing of CPU fan which was not done because I have not found any fan for old pentium 4 machine in the market. I have to hit online stores (but i am in india and it's hard to find it in online shops which can deliver it to me). So far I don't see this as HD or Monitor or OS issue because I have tested with other HD and results are the same. So it could be either CPU fan or motherboard? What could be possible issue with the hardware?

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