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  • Change library load order at run time (like LD_PRELOAD but during execution)

    - by tylerl
    How do I change the library a function loads from during run time? For example, say I want to replace the standard printf function with something new, I can write my own version and compile it into a shared library, then put "LD_PRELOAD=/my/library.so" in the environment before running my executable. But let's say that instead, I want to change that linkage from within the program itself. Surely that must be possible... right?

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  • Ubuntu Server upgrade over SSH hang

    - by Chris
    I was upgrading an Ubuntu server (using the do-release-upgrade) command over SSH (I know it's a bad idea, but it was the only choice; I don't have physical access to the server). It seemed to go fine and was going thru the 'setting up package name' part when it froze on the line Installing new version of config file /etc/mysql/debian-start ... The SSH connection appears to be still active, as pressing the up arrow echoes back ^[[A, and so on. When I log in on another SSH connection I can log in fine, but the ** system needs restart ** message shows up. Is it safe to ^C the release-upgrade command, or try to reboot the server? Should I ^C the upgrade and try it again? Anything else I could try?

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  • Recovering database files from a corrupted VHD

    - by Apocalypse9
    We have a SQL server hosted on a virtual machine. Our hosting company updated/restarted the server and for some reason the virtual machines became unbootable. We've spoken to Microsoft and used a few higher level tools to attempt to recover the virtual machines but were unsuccessful. In browsing the file system the database folder doesn't even appear. I'm wondering if there are any lower level tools that might be able to find and copy the database files. As far as I know the physical hard drive is ok, so I'm hoping there may be some way to recover the files themselves even if the rest of the virtual machine file-system is a loss. Obviously we're in a bit of a bind, and any help/ suggestions are very much appreciated.

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  • Running OpenMPI on Windows XP

    - by iamweird
    Hi there. I'm trying to build a simple cluster based on Windows XP. I compiled OpenMPI-1.4.2 successfully, and tools like mpicc and ompi_info work too, but I can't get my mpirun working properly. The only output I can see is Z:\orterun --hostfile z:\hosts.txt -np 2 hostname [host0:04728] Failed to initialize COM library. Error code = -2147417850 [host0:04728] [[8946,0],0] ORTE_ERROR_LOG: Error in file ..\..\openmpi-1.4.2 \orte\mca\ess\hnp\ess_hnp_module.c at line 218 -------------------------------------------------------------------------- It looks like orte_init failed for some reason; your parallel process is likely to abort. There are many reasons that a parallel process can fail during orte_init; some of which are due to configuration or environment problems. This failure appears to be an internal failure; here's some additional information (which may only be relevant to an Open MPI developer): orte_plm_init failed -- Returned value Error (-1) instead of ORTE_SUCCESS -------------------------------------------------------------------------- [host0:04728] [[8946,0],0] ORTE_ERROR_LOG: Error in file ..\..\openmpi-1.4.2 \orte\runtime\orte_init.c at line 132 -------------------------------------------------------------------------- It looks like orte_init failed for some reason; your parallel process is likely to abort. There are many reasons that a parallel process can fail during orte_init; some of which are due to configuration or environment problems. This failure appears to be an internal failure; here's some additional information (which may only be relevant to an Open MPI developer): orte_ess_set_name failed -- Returned value Error (-1) instead of ORTE_SUCCESS -------------------------------------------------------------------------- [host0:04728] [[8946,0],0] ORTE_ERROR_LOG: Error in file ..\..\..\..\openmpi -1.4.2\orte\tools\orterun\orterun.c at line 543 Where z:\hosts.txt appears as follows: host0 host1 Z: is a shared network drive available to both host0 and host1. What my problem is and how do I fix it? Upd: Ok, this problem seems to be fixed. It seems to me that WideCap driver and/or software components causes this error to appear. A "clean" machine runs local task successfully. Anyway, I still cannot run a task within at least 2 machines, I'm getting following message: Z:\mpirun --hostfile z:\hosts.txt -np 2 hostname connecting to host1 username:cluster password:******** Save Credential?(Y/N) y [host0:04728] This feature hasn't been implemented yet. [host0:04728] Could not connect to namespace cimv2 on node host1. Error code =-2147024891 -------------------------------------------------------------------------- mpirun was unable to start the specified application as it encountered an error. More information may be available above. -------------------------------------------------------------------------- I googled a little and did all the things as described here: http://www.open-mpi.org/community/lists/users/2010/03/12355.php but I'm still getting the same error. Can anyone help me? Upd2: Error code -2147024891 might be WMI error WBEM_E_INVALID_PARAMETER (0x80041008) which occures when one of the parameters passed to the WMI call is not correct. Does this mean that the problem is in OpenMPI source code itself? Or maybe it's because of wrong/outdated wincred.h and credui.lib I used while building OpenMPI from the source code?

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  • Web server replica not working in other server

    - by user761076
    I have a Drupal installation (php+mysql) in a server, and I'm trying to copy this installation to another server with the same configuration, same physical and virtual path, same db configuration, etc. The thing is, in my new server I get the homepage to work, but not the inner pages, so I guess has something to do with rewrite (mod_rewrite is installed) (both .htaccess are the same). When I access http://localhost/myweb/content/mypage I get a 404 or a "Forbidden" if I uncomment this in httpd.conf (original httpd.conf does not have this entry): <Directory path/to/docs"> DirectoryIndex index.php index.html Options Indexes FollowSymLinks AllowOverride None Order allow,deny Allow from all </Directory> Any clue? Thank you

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  • Which is the correct way to use PDO in PHP?

    - by Runner
    One from here: $sth->execute(array(':calories' => $calories, ':colour' => $colour)); The other from here: /*** reassign the variables again ***/ $data = array('animal_id'=>4, 'animal_name' => 'bruce'); /*** execute the prepared statement ***/ $stmt->execute($data); My question is: :key or key ? Sorry I don't have the PHP environment here.

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  • WD Passport Won't Mount

    - by Scott7278
    My WD Passport won't mount. However, it turns on when plugged into my macbook and doesn't make any strange noises. It took a small fall (just a few inches and it was on my couch) and I'm very concerned about physical damage. When I open up disk utility it shows the root 500 GB WD My Passport drive which seems to be OK when I verify it and repair it. However, the "External Hard Drive", the directory underneath the "500 GB WD My Passport drive" is grayed out. When I verify the External Hard Drive it says it needs to be rapaired. When I try and repair it it gives me the following message and does not seem to progress: "Updating boot support partitions for the volume as required." Is there hope for me recovering my data? I stupidly have important data on it that I don't have anywhere else.

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  • Network Block Device (NBD) clients for Windows or similar solutions

    - by przemoc
    Are there any NBD clients for Windows? Strangely, I cannot find any, or I am searching for them in a wrong way. Such client should be possibly a driver with front-end tool (may be a command-line one) allowing to create virtual drives and associate them with given hosts (or simply localhost) and ports where NBD servers are listening. From user perspective virtual drive should be close to what physical drive is, so it should be accessible as something like \\.\PhysicalDriveX (maybe \\.\VirtualDriveX?), be visible in Disk Management (diskmgmt.msc) and mountvol tools at least. (The only thing I found remotely close to NBD on Windows is ImDisk's proxy mode and companion tool devio, but AFAIK ImDisk only works at partition level (so no virtual drive) and devio uses different protocol.) Secondary question is: Are there any (preferably simple) Windows-specific solutions allowing creation of virtual drive delegating read/write request to user-space via some explicit way (like via TCP, IPC, DLL implementing given API, etc.)?

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  • Eclipse: Should I create a workspace for each project ?

    - by Zombies
    I am simply wondering whether it is best to put all of my Eclipse projects into one workspace, or do a 1 workspace per 1 project. I am just a solo developer, for hobby more or less, but the apps I create do actually have production versions that are running on rather frequent cron jobs, so its almost like an amateur production environment. The only problems I have noticed so far is for exporting JARs, I have the potential to include source files from other projects which seems like it could get messy (maybe?).

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  • xDebug : Output traces in php script?

    - by Industrial
    Hi! I have tried to use xDebug on my local Ubuntu environment to speed up development and it's a great asset. However, I would like to see the output of the Trace function directly in the browser, at the end of the script. How can this be done?

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  • VPN server on Windows Server 2008 for a small office

    - by cmbrnt
    I'm going to refurbish the IT-infrastructure for a small organization with one single office, and I'm not sure what VPN server to use. In your opinion, would the built-in Windows Server 2008 VPN server suffice or are there any specific problems with it as opposed to, for example, OpenVPN? I'd rather run a Windows native VPN server, but if there are few (preferably free) good alternatives, I could install VMware ESXi and virtualize both Windows and an OpenVPN-server. By the way, because of a low budget this office runs a solution with only one physical server. Any advice would be great to help me grasp this field of which I'm quite a novice. Thank you!

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  • Why is my platform variable defined as 'BNB'?

    - by Scott Langham
    Hi, Something, maybe the windows sdk or visual studio installer, has defined the Platform environment variable and given it the value BNB. What does BNB mean, and why is Platform set to BNB? Thanks. I've seen this, but it doesn't answer my question: http://social.msdn.microsoft.com/Forums/en-US/msbuild/thread/1d229d75-aa89-42bf-809b-ef98f42072bb

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  • Deleting a partition on dual boot

    - by blade4
    I have split my C:\ physical disk into 3 seperate partitions: C, H, and K. C has my original OS and is the active partition, H has another OS (dual boot), and K has song files. I want to keep the other OS (Windows Server) and when I am in this OS, I can't delete C ("Windows cannot format this partition"). What is the best way for me to get rid of C, keep all the songs intact, and the Server OS partition, so I replace C with another OS, and then get rid of the original Windows Server OS (So revert the dual boot to a single boot).

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  • When using Oracle load balancing and ADO.NET, how do you know which host the command executed on?

    - by Leeks and Leaks
    It's possible to use Microsoft's OracleClient assembly to connect to an Oracle database, and using Oracle's connection string format, set it up to use load balancing, provided your Oracle environment supports it. The question I have is how do you know after the fact, which db host the command actually executed against? Is there a way to retrieve the machine name from the load balanced set of machines?

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