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  • How to test video card memory

    - by oki
    I want to test the memory of my video card because lastly there are vertical lines on my screen. I do some basic troubleshoot and it seems that the problem is in video card. Therefore, I want to validate the error at the video card by using a video card memory test program. I find one that is used for nvidia card with CUDA support, but my card is Nvidia GeForce 7600 without CUDA support.

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  • Smartphone Emulator for checking emails are readable

    - by celenius
    Is there an emulator that would enable me to test the appearance of an email as it is being read on a smartphone (without specifying the phone type)? What I would like to be able to do, is to send an email to this emulator, and then scroll down through the email using the emulator. Ive searched online, and any emulators I found are for testing software rather than exploring the visual appearance of email. I'm using Mac OSX - thanks in advance.

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  • Noob proftpd questions

    - by Camran
    I have setup my VPS pretty much now, and want to upload some basic files to the server. How is this done in Ubuntu 9.10? I have PuTTY and use the terminal there... Is there any ftp program, like in regular managed hostings, to just upload files with? I was thinking about proftpd, but don't have a clue how to get it to work. I am using my home-laptop with windows xp to command the VPS. Thanks

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  • Noob proftpd questions

    - by Camran
    I have setup my VPS pretty much now, and want to upload some basic files to the server. How is this done in Ubuntu 9.10? I have PuTTY and use the terminal there... Is there any ftp program, like in regular managed hostings, to just upload files with? I was thinking about proftpd, but don't have a clue how to get it to work. I am using my home-laptop with windows xp to command the VPS. Thanks

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  • Internal mail flow between two sites

    - by Eric Hazen
    I have two sites: DATACENTER HQ Exchange Roles: HQ: Mailbox Store, Client Access, Hub Transport DATACENTER: Client Access, Hub Transport Here is the basic mail flow requirements: Outgoing Email: HQ > DATACENTER > INTERNET Incoming Email: INTERNET > DATACENTER > HQ I've been banging my head on this setting up different Hub Transport rules, etc. Any suggestions?

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  • High I/O latency with software RAID, LUKS encrypted and LVM partitioned KVM setup

    - by aef
    I found out a performance problems with a Mumble server, which I described in a previous question are caused by an I/O latency problem of unknown origin. As I have no idea what is causing this and how to further debug it, I'm asking for your ideas on the topic. I'm running a Hetzner EX4S root server as KVM hypervisor. The server is running Debian Wheezy Beta 4 and KVM virtualisation is utilized through LibVirt. The server has two different 3TB hard drives as one of the hard drives was replaced after S.M.A.R.T. errors were reported. The first hard disk is a Seagate Barracuda XT ST33000651AS (512 bytes logical, 4096 bytes physical sector size), the other one a Seagate Barracuda 7200.14 (AF) ST3000DM001-9YN166 (512 bytes logical and physical sector size). There are two Linux software RAID1 devices. One for the unencrypted boot partition and one as container for the encrypted rest, using both hard drives. Inside the latter RAID device lies an AES encrypted LUKS container. Inside the LUKS container there is a LVM physical volume. The hypervisor's VFS is split on three logical volumes on the described LVM physical volume: one for /, one for /home and one for swap. Here is a diagram of the block device configuration stack: sda (Physical HDD) - md0 (RAID1) - md1 (RAID1) sdb (Physical HDD) - md0 (RAID1) - md1 (RAID1) md0 (Boot RAID) - ext4 (/boot) md1 (Data RAID) - LUKS container - LVM Physical volume - LVM volume hypervisor-root - LVM volume hypervisor-home - LVM volume hypervisor-swap - … (Virtual machine volumes) The guest systems (virtual machines) are mostly running Debian Wheezy Beta 4 too. We have one additional Ubuntu Precise instance. They get their block devices from the LVM physical volume, too. The volumes are accessed through Virtio drivers in native writethrough mode. The IO scheduler (elevator) on both the hypervisor and the guest system is set to deadline instead of the default cfs as that happened to be the most performant setup according to our bonnie++ test series. The I/O latency problem is experienced not only inside the guest systems but is also affecting services running on the hypervisor system itself. The setup seems complex, but I'm sure that not the basic structure causes the latency problems, as my previous server ran four years with almost the same basic setup, without any of the performance problems. On the old setup the following things were different: Debian Lenny was the OS for both hypervisor and almost all guests Xen software virtualisation (therefore no Virtio, also) no LibVirt management Different hard drives, each 1.5TB in size (one of them was a Seagate Barracuda 7200.11 ST31500341AS, the other one I can't tell anymore) We had no IPv6 connectivity Neither in the hypervisor nor in guests we had noticable I/O latency problems According the the datasheets, the current hard drives and the one of the old machine have an average latency of 4.12ms.

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  • Best way to manually sort random text files?

    - by Jane
    I have about 1000 text files and I need to view each, and move it to a folder if it's the correct one. I can only do basic sorting by length/size, and I can't grep because the text is random. How can I do this besides manually openiing + saving each in gedit. I'm on Ubuntu Linux. Thanks

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  • Apple / Mac OS X - Is there a Package Manager like Linux

    - by Walter White
    I am a Linux/UNIX user and love the package management that comes with it. For the most part, I like Ubuntu, but just like anything else, it is the minor things that you live with daily that would be nice if they just worked. My main issue is my wacom tablet while it works, every time there is an OS update, I have to rebuild the wacom driver. The other slightly annoying issue is, my ATI video card is not fully supported. When I use the HDMI out, the sound doesn't go through it, and the screen is not entirely used. I would happily get an Apple if it had a similar package management system like Ubuntu, Gentoo, or other Linux distribution. This takes the work out of getting the latest enhancements or fixes. It also takes all the guess work out about what you need to get something to work. I just want to use my computer, not administer it. Aside from Apple applications, if I wanted to install the GIMP on an apple, would it go and fetch ufraw if I wanted support for that and whatever other dependencies GIMP has? If I want Netbeans installed, will it go and get a JDK and maven if I want that? If not, is there something in the works? I know I don't update my applications that frequently, but that is mainly because I'm not aware of the updates. The updates all happen in the background. Walter

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  • Error opening microsoft.com in Windows 7

    - by Ilnur
    I need help with my browsers. In Windows 7 Basic I have 2 browsers installed: Internet Explorer 8 and Google Chrome. When I try to open pages which are associated with Microsoft (like Live and others), my browser crashes; Internet Explorer 8 crashes too. But Opera (I've installed it later) works fine with those pages. P.S. I tried to scan my PC for trojans and viruses, but it's clean.

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  • open_basedir problems with APC and Symfony2

    - by Stephen Orr
    I'm currently setting up a shared staging environment for one of our applications, written in PHP5.3 and using the Symfony2 framework. If I only host a single instance of the application per server, everything works as it should. However, if I then deploy additional instances of the application (which may or may not share the exact same code, dependent on client customisations), I get errors like this: [Tue Nov 06 10:19:23 2012] [error] [client 127.0.0.1] PHP Warning: require(/var/www/vhosts/application1/httpdocs/vendor/doctrine-common/lib/Doctrine/Common/Annotations/AnnotationRegistry.php): failed to open stream: Operation not permitted in /var/www/vhosts/application2/httpdocs/app/bootstrap.php.cache on line 1193 [Tue Nov 06 10:19:23 2012] [error] [client 127.0.0.1] PHP Fatal error: require(): Failed opening required '/var/www/vhosts/application1/httpdocs/app/../vendor/doctrine-common/lib/Doctrine/Common/Annotations/AnnotationRegistry.php' (include_path='.:/usr/share/pear:/usr/share/php') in /var/www/vhosts/application2/httpdocs/app/bootstrap.php.cache on line 1193 Basically, the second site is trying to require the files from the first site, but due to open_basedir restrictions it can't do that. I'm not willing to disable open_basedir as that is only masking the problem instead of solving it, and creates a dependency between applications that should not be present. I initially believed this was related to a Symfony2 error, but I've now tracked it down to an issue with APC; disabling APC also solves the error, but I'm concerned about the performance impact of doing so. Does anyone have any suggestions on what I might be able to do?

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  • H/w suggestions for 24 port PoE switch.

    - by sunny
    Hi, I am looking for a 24 port PoE(IEEE 802.3af) switch to power some Snom phones that I have. Please suggest some appliances. I just need basic L2 functions and wouldn't want to go for a expensive Cisco switch. Here are my requirements: 1) IEEE 802.3af PoE 2) 802.1q VLAN 3) Full-Duplex I'd like a CLI also if possible, I've looked at Vyatta, but buying their 24 port appliance is way more expensive than a d-link or a netgear one. Thanks for your suggestions

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  • Different background images in Conemu tabs

    - by jasper
    Is it possible to assign different background images to tabs in Conemu? Console2 supports custom backgrounds per tab, and I'd like something similar to the functionality it provides. Perhaps I can set this in Startup - Tasks or via the command line of a running tab, but I can't find any information on it. e.g. Tab1 cmd "cmd.png" Tab2 powershell "ps.png" Tab3 Visual Studio Command Prompt "vs.png" Tab4 Admin:cmd "warning.png"

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  • Can't open cocoa emacs from terminal using open -a

    - by Shane
    I installed emacs on my MacBook Air running Mac OS X 10.6.5 from this site http://emacsformacosx.com/. I believe this is what used to be called cocoa emacs. I dragged it into my Application folder and it works fine when I run it from there. I want to be able to run it from the Terminal. After some googling, I tried open -a /Application/Emacs.app foo.txt (foo.txt was and existing file). I got two emacs windows - one with welcome screen and one with foo.txt loaded. I tried a few applications in the /Applications directory and they did not seem to behave like this. I had installed it using my own account (an admin account) so after doing ls -l on /Application I noticed that the owner and group were different from the other entries in this folder. I recursively changed the owner and group to root and wheel, like the others, but this did not help. The only thing that looks funny now is that there that ls -l show a @ character which has something to do with extended attributes but I don't know how to check these. Any suggestions on what to check next? Is using the open command the only to run the program? Can I simulate what it does using a shell script?

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  • SSL certificate for Oracle Application Server 11g

    - by Easter Sunshine
    I was asked to get an SSL certificate for an "Oracle Application Server 11g" which has a soon-to-expire certificate. Brushing aside the fact that 10g seems to be the newest version, I got a certificate from InCommon, as I usually do without problem (except this is the first time I supplied Oracle Application Server 11g as the software type on the CSR form). On the email containing links to download the certificate, it mentioned: Certificate Details: SSL Type : InCommon SSL Server : OTHER I forwarded the email over to the person responsible for installing it and got a reply that the server type must be Oracle Application Server for the certificate to work (the CN is the same as before). They were unable to install this certificate (no details provided to me) and mentioned they had this issue previously with Thawte when they didn't supply Oracle Application Server as the server type. I don't see any significant difference between the currently installed certificate (working) and the new one I just got signed by InCommon (not working). $ openssl x509 -in sso-current.cer -text shows, with irrelevant information ommitted. Data: Version: 3 (0x2) Signature Algorithm: sha1WithRSAEncryption Issuer: C=ZA, ST=Western Cape, L=Cape Town, O=Thawte Consulting cc, OU=Certification Services Division, CN=Thawte Premium Server CA/[email protected] Validity Not Before: Oct 1 00:00:00 2009 GMT Not After : Nov 28 23:59:59 2012 GMT Subject Public Key Info: Public Key Algorithm: rsaEncryption Public-Key: (2048 bit) Modulus: Exponent: 65537 (0x10001) X509v3 extensions: X509v3 Basic Constraints: critical CA:FALSE X509v3 CRL Distribution Points: Full Name: URI:http://crl.thawte.com/ThawteServerPremiumCA.crl X509v3 Extended Key Usage: TLS Web Server Authentication, TLS Web Client Authentication Authority Information Access: OCSP - URI:http://ocsp.thawte.com Signature Algorithm: sha1WithRSAEncryption and $ openssl x509 -in sso-new.cer -text shows Data: Version: 3 (0x2) Signature Algorithm: sha1WithRSAEncryption Issuer: C=US, O=Internet2, OU=InCommon, CN=InCommon Server CA Validity Not Before: Nov 8 00:00:00 2012 GMT Not After : Nov 8 23:59:59 2014 GMT Subject Public Key Info: Public Key Algorithm: rsaEncryption Public-Key: (2048 bit) Modulus: Exponent: 65537 (0x10001) X509v3 extensions: X509v3 Authority Key Identifier: keyid:48:4F:5A:FA:2F:4A:9A:5E:E0:50:F3:6B:7B:55:A5:DE:F5:BE:34:5D X509v3 Subject Key Identifier: 18:8D:F6:F5:87:4D:C4:08:7B:2B:3F:02:A1:C7:AC:6D:A7:90:93:02 X509v3 Key Usage: critical Digital Signature, Key Encipherment X509v3 Basic Constraints: critical CA:FALSE X509v3 Extended Key Usage: TLS Web Server Authentication, TLS Web Client Authentication X509v3 Certificate Policies: Policy: 1.3.6.1.4.1.5923.1.4.3.1.1 CPS: https://www.incommon.org/cert/repository/cps_ssl.pdf X509v3 CRL Distribution Points: Full Name: URI:http://crl.incommon.org/InCommonServerCA.crl Authority Information Access: CA Issuers - URI:http://cert.incommon.org/InCommonServerCA.crt OCSP - URI:http://ocsp.incommon.org Nothing jumps out at me as the reason one would not work so I don't have a specific request for the signer for what to do differently when re-signing.

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  • Windows Vista Corrupt Registry

    - by Peter
    Hey, I have a laptop with Windows Vista Basic. It won't boot. I have tried an automatic repair with the installation disc but the error cannot be repaired automatically. According to the test results the registry is corrupt. I have found this guide on how to recover from a corrupt registry with Windows XP here. Is this guide also applicable to Vista or is there an alternative method I can try (short of reinstalling Vista)? Cheers, Pete

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  • What super-calculator do you use?

    - by Jeremy Rudd
    Windows Calculator can switch into a "Scientific" mode, getting more math and logical operators, but that's not good enough. I know there are tons of features its missing, such as the ones we see in the Windows 7 calc, or simply making things more visual. Its been years and I still haven't found a good calculator replacement. Suggestions? And hopefully your calc replaces MS Calc when I press the dedicated "calculator key" on my Keyboard, so I don't have to hunt around for a shortcut.

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  • Linux - real-world hardware RAID controller tuning (scsi and cciss)

    - by ewwhite
    Most of the Linux systems I manage feature hardware RAID controllers (mostly HP Smart Array). They're all running RHEL or CentOS. I'm looking for real-world tunables to help optimize performance for setups that incorporate hardware RAID controllers with SAS disks (Smart Array, Perc, LSI, etc.) and battery-backed or flash-backed cache. Assume RAID 1+0 and multiple spindles (4+ disks). I spend a considerable amount of time tuning Linux network settings for low-latency and financial trading applications. But many of those options are well-documented (changing send/receive buffers, modifying TCP window settings, etc.). What are engineers doing on the storage side? Historically, I've made changes to the I/O scheduling elevator, recently opting for the deadline and noop schedulers to improve performance within my applications. As RHEL versions have progressed, I've also noticed that the compiled-in defaults for SCSI and CCISS block devices have changed as well. This has had an impact on the recommended storage subsystem settings over time. However, it's been awhile since I've seen any clear recommendations. And I know that the OS defaults aren't optimal. For example, it seems that the default read-ahead buffer of 128kb is extremely small for a deployment on server-class hardware. The following articles explore the performance impact of changing read-ahead cache and nr_requests values on the block queues. http://zackreed.me/articles/54-hp-smart-array-p410-controller-tuning http://www.overclock.net/t/515068/tuning-a-hp-smart-array-p400-with-linux-why-tuning-really-matters http://yoshinorimatsunobu.blogspot.com/2009/04/linux-io-scheduler-queue-size-and.html For example, these are suggested changes for an HP Smart Array RAID controller: echo "noop" > /sys/block/cciss\!c0d0/queue/scheduler blockdev --setra 65536 /dev/cciss/c0d0 echo 512 > /sys/block/cciss\!c0d0/queue/nr_requests echo 2048 > /sys/block/cciss\!c0d0/queue/read_ahead_kb What else can be reliably tuned to improve storage performance? I'm specifically looking for sysctl and sysfs options in production scenarios.

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  • How do you explain what the BIOS is to non-Super User?

    - by David Johnstone
    In a particularly nerdy Facebook status update I mentioned that I had flashed my BIOS. One of my friends asked what the BIOS is. My question is: How do you explain what the BIOS is and does to a layperson? (Hint: "The BIOS is the basic input/output system" is not going to be accepted as the answer.) (Of course, the real question is "does she like me?", but I'm not sure there's a site for this :-p )

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  • Software for managing a gamenet

    - by Isaac
    I need a software for managing gamenet (Gamenet is like a cybercafe except people play games in gamenet instead of surfing the web!) The software should have this basic features: Accounting features (defining users, assigning a usage time to them, etc) Denying access to regular windows features (windows explorer, creating/editing/deleting files) Showing a list of available games to users to run. Creating login report I've tested a software named GamePort but it has some bugs and shortcomings.

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