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• How to access an SD card from a virtual machine?

  - by Punit Soni

  I want to format an SD card from my Linux virtual machine. I have a built-in SD card reader in my laptop. I tried using VirtualBox and VMware Player and installed Ubuntu 10.04 guest. None of them are showing the SD card reader as a device. I can access the SD card from the Windows host. I am not interested in solutions using shared folders as I want to access the SD card as hardware (it should show up in /dev). I basically want to set up the SD card for BeagleBoard, but I don't want to install physical Ubuntu in my PC.

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• Operation System Clone from a Motherboard to Another

  - by Devian

  Lately we had an idea with my Family of building a Super Computer from Scratch. So while we were planning on building our setup, one idea came to my head that it seems possible but i want also your opinions. Lets say that we have 2 ATX Motherboards and 1 MicroATX. Motherboard Setup: 1x ASUS Rampage Extreme Black Edition 1x Intel Core i7 4960x 4x GTX Titan 8x 8GB 1866 Ram Motherboard Setup: 1x SuperMicro X9DRG-QF 2x Intel Xeon E7-8890V2 1x nVIDIA QUADRO K6000 4x nVIDIA Tesla K40 128 GB 1866 Ram And imagine a Solid State Drive with a Switch connected to both of the MotherBoards Can i edit & copy all the data of The first motherboard's RAM to The Other's to be able to continue operating my current Operation System after switching the SSD to the Second Motherboard, from the Second MotherBoard and vice versa? Les say my "Switch Application" modifies everything the Kernel needs to believe nothing happend and continuing its operation from the same point the first motherboard stopped. (Changes on the Device List, CPU Cores, Drivers... etc)

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• Reverse rdesktop or VNC overlay image!

  - by carlesso

  Hi all. I've got a central server (linux based) and many clients (Windows XP Embedded, afaik) in public places around my country. I need to have these clients to connect to the server with a "reverse" tunnel, that is to say that I need to control the clients from the server but the connection is initialized by clients. The requirement is that, during the connection, an overlay image (or something like that, like a modified version of login screen) is displayed. Some stuff like "Work In Progress". My first idea was to use vncviewer -listen and vnc in reverse mode, but cannot understand how to obfuscate the work I'm doing. Other idea was to use rdesktop in "reverse" mode, but it seems it does not support it. Using rdekstop reverse seems the nicest solution (I can login back the user was in before connection, the login manager - which I can modified - is displayed), but any hint will be appreciated! Thanks in advance!

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• How to detect hard disk failure?

  - by Devator

  So, one of my servers has a hard disk failure. It's running software RAID, the system locked up and according to /proc/mdstat (and /var/log/messages), it's really down: Personalities : [raid1] md2 : active raid1 sdb2[1] 104320 blocks [2/1] [_U] md5 : active raid1 sdb5[1] 2104448 blocks [2/1] [_U] md6 : active raid1 sdb6[1] 830134656 blocks [2/1] [_U] md1 : active raid1 sdb1[1] 143363968 blocks [2/1] [_U] and Nov 5 22:04:37 m38501 smartd[4467]: Device: /dev/sda, not capable of SMART self-check However when I do smartctl -H /dev/sda, it passes the test. It also passes the test with smartctl --test=short /dev/sda. So, is smartctl a broken testing tool, or am I doing something completely off?

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• Songs/Movies are not being played

  - by romilnagrani

  Hi the problem i am facing is very odd. None of my songs (.mp3/.avi etc) are not able to run in any of the media players: Windows media player, Windows media center, VLC, DIV etc. What i have done before posting the question here. a. Check Device and Drivers and they are working OK and Updated even. b. Run Sample Audio (Downloaded from Internet) in Adobe Sound-booth and it worked. c. Plus i run a video in YouTube and i was able to hear it! d. I am able to hear windows Error Beeps too..!!! e. While running Movies i could see playing but not hear it What could be the problem? please help

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• Songs/Movies are not being played

  - by romilnagrani

  Hi the problem i am facing is very odd. None of my songs (.mp3/.avi etc) are not able to run in any of the media players: Windows media player, Windows media center, VLC, DIV etc. What i have done before posting the question here. a. Check Device and Drivers and they are working OK and Updated even. b. Run Sample Audio (Downloaded from Internet) in Adobe Sound-booth and it worked. c. Plus i run a video in YouTube and i was able to hear it! d. I am able to hear windows Error Beeps too..!!! e. While running Movies i could see playing but not hear it What could be the problem? please help thanks...

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• Songs/Movies are not being played

  - by romilnagrani

  Hi the problem i am facing is very odd. None of my songs (.mp3/.avi etc) are not able to run in any of the media players: Windows media player, Windows media center, VLC, DIV etc. What i have done before posting the question here. a. Check Device and Drivers and they are working OK and Updated even. b. Run Sample Audio (Downloaded from Internet) in Adobe Sound-booth and it worked. c. Plus i run a video in YouTube and i was able to hear it! d. I am able to hear windows Error Beeps too..!!! e. While running Movies i could see playing but not hear it What could be the problem? please help

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• kernel: journal commit I/O error

  - by jasondewitt

  I am having some problems with a Dell 1950 server. I am installing RHEL 4.6 along with Oracle and some other software on here. I am randomly getting an error message saying "kernel: journal commit I/O error" on my ssh session and on the monitor I have hooked up to the server I see an error scrolling by that says "EXT3-fs error (device sda5) in start_transaction: Journal has aborted." It has happened several times but never at the same point during the install. Actually, this last time the system was up and running and I was just trying to import a database into oracle. This has happened on several hard drives, so I'm pretty sure that is not the problem. This makes me think the raid controller is going bad. What do you guys think? ** UPDATE ** Pretty sure it was a bad hard drive. I threw another drive in the server and it's been running for about 48 hours with out problems.

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• How to prepare and secure a Macbook Pro for work/office?

  - by sunpech

  I plan to use my Macbook Pro at work/office. Before I do so, I will need to speak to my manager on how to properly prepare and secure it since this is the first Mac that will be regularly used on the network in the office and company intranet. The intranet comprises mostly of PCs running Microsoft Windows XP, Server 2003, and Windows 7. So there's definitely a Microsoft-only culture in the office, and the infrastructure/networking team are mostly unfamiliar with non-Microsoft technology and software. What steps and software would I need to prepare and secure my Macbook Pro for work/office? Antivirus/Spyware software for Mac required/necessary? What options do I have to encrypt files, or possibly the whole drive/partition? What network/firewall settings should be enabled?

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• Piping stream into tar on FreeBSD

  - by Casey Jordan

  I am trying to pipe a tar/gzip archive into tar to decompress it. The script I have is part of a self extracting installer, where my archive is appended to the script. This works fine on linux, and the script looks like this: export TMPDIR=`mktemp -d /tmp/selfextract.XXXXXX` echo "TEMP: $TMPDIR" ARCHIVE=`awk '/^__ARCHIVE_BELOW__/ {print NR + 1; exit 0; }' $0` tail -n+$ARCHIVE $0 | tar xz -C $TMPDIR exit 0 __ARCHIVE_BELOW__ The tar archive as a string is after the ARCHIVE_BELOW but I omitted it from here since it's huge. However, when I do this on FreeBSD I get the following error: tar: Failed to open '/dev/sa0' I read that this is because free BSD expects to read from that device by default and you can tell it to read from stdin by passing -f - like so: tail -n+$ARCHIVE $0 | tar zxf - -C $TMPDIR However, when I do this I just get the error: tar: Damaged tar archive tar: Retrying... Can anyone point out what I am doing wrong here? I need to do it this way (Via piping) for efficiency reasons. Thanks

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• Windows server 2008 R2 IIS7 file permissions

  - by StealthRT

  Hey all i am trying to figure out why i can not access a index.php file from within the wwwroot/mollify/backend directory. It keeps coming up with this: Server Error 403 - Forbidden: Access is denied. You do not have permission to view this directory or page using the credentials that you supplied. I've given all the permissions (Full control) to the wwwroot directory i could think of (IUSR, Guest, GUESTS, IIS_IUSRS, Users, Administrators, NETWORK, NETWORK SERVICE, SYSTEM, CREATOR OWNER & Everyone). I also added index.php to the "Default Document" under my website settings in IIS 7 manager. What else am i missing? Thanks! David

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• Keyboard doesn't load in windows xp after Alureon infection

  - by alureonissue

  AVAST detected alureon in a number of system files including atapi.sys and kbdclass.sys iple I quarantined those files, and restarted my machine. After restarting, my keyboard and cdrom did not work (I assumed those drivers would be automatically replaced, but was apparently wrong.) I went into device manager, and checked for hardware changes, it fixed the cdrom (which works now) and looked as though it fixed the keyboard as well. It did not. After multiple reboots the keyboard is still not recognized. It works up until the XP login screen loads, after which it is completely unresponsive. Any advice would be appreciated. Thanks :)

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• Forward a port with modem (with built-in but disabled router) + a separate router

  - by Youn

  I have a Motorola SBG6580 that is a modem and a wireless router in one. However, the wireless router part was bad so I disabled it and got a separate wireless router. I can go into the configuration pages of both the modem and the router now, and I'm confused as to which device needs to be configured for port-forwarding. I have a raspberry pi that I want to set up as a webserver. Do I configure the router, the modem, or both? Right now, the SBG6580's 1st LAN is connected to the wireless router's WAN, and the internet is working well. Note that the SBG6580 only has 4 ports, and I'm assuming they're LAN,as they are not labeled.

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• Why does storage's performance change at various queue depths?

  - by Mxx

  I'm in the market for a storage upgrade for our servers. I'm looking at benchmarks of various PCIe SSD devices and in comparisons I see that IOPS change at various queue depths. How can that be and why is that happening? The way I understand things is: I have a device with maximum (theoretical) of 100k IOPS. If my workload consistently produces 100,001 IOPS, I'll have a queue depth of 1, am I correct? However, from what I see in benchmarks some devices run slower at lower queue depths, then speedup at depth of 4-64 and then slow down again at even larger depths. Isn't queue depths a property of OS(or perhaps storage controller), so why would that affect IOPS?

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• No GUI after upgrade to Ubuntu 9.10 (boots to command line)

  - by Gathris

  I have just upgraded to Ubuntu 9.10 (network upgrade using the update manager, from 9.04 which had different graphics related problems) and when I try to boot into it all I get a small Ubuntu logo, flickering text and then the tty1 command line with a logon prompt. startx gives following error: Fatal server error: no screens found I traced down a tutorial that said I needed the latest graphics drivers (Gigabyte ATI Radeon 4650 HD installed with 9.10 catalyst drivers) so I did using the 'sh' command and a USB stick (I have a working Windows partition) and it installed fine but did not fix the problem. Edit: Thanks to UK and Arjan van Bentem below I was able to understand the full error message of start x: Parse error on lone 2 of /etc/X11/xorg.conf 'nameserver' is not a valid keyword in this section Fatal server error: no screens found This has nothing to do with a graphical error (sorry if I misled anyone) but the xorg.conf file has 3 lines in it and lines 2-3 have an entry 'nameserver'. Using the nano command I commented out (using a # before the entries) the nameservers and can now boot Ubuntu. Thanks to everyone for their help.

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• OpenVPN bandwith restrictrictions and cpu power needed

  - by user197664

  In Open VPN is there a way to set a maximum limit of data and speed per user? Say user "reptar' is abusing the VPN and I wanted to limit his/her speeds and/or data how would one go about doing this? Would I need to know the IP address of the abuser? Also, I have seen articles around the internet about turing a Rasberry PI in to a VPN server. If I did such a thing how many users would this device be able to handle at a given time? I believe it runs at 512 gb and clocks at around 700 mhz.

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• Moving my bcd from HDD to SSD - Windows 7

  - by lelouch

  I have windows 7 installed on my SSD, but the /boot/ and bootmgr are on my hard-drive. I want to move them to my SSD for faster booting times. So i figured that I can fix the problem using the Windows startup repair tool. I made a bootable windows 7 flash drive, and ran Windows startup repair. However, it exits with an error. I also can't see my OS in the list of installed OSs. I then tried fixing via the command prompt with bootrec /fixmbr, bootrec /fixboot, bootrec /rebuildbcd. Bootrec /rebuildbcd finds the OS, but gives me the error "The requested system device cannot be found" when i try fixing it. Does anyone know why this is failing? I read somewhere that the Windows Repair environment doesn't support a flash drive, which is why I'm getting that error. Is this true? Unforunately my dvd drive is playing up so I can't use it to test this.

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• Mac Mini 1.66 no sound on Windows 7

  - by Steph

  I've tried everything I could to get the sound working. I've tried to install the drivers from the Snow Leopard disk, then I went and got the latest RealTek drivers from the RealTek website. Then I read that old Mac mini's could have an integrated Cirrus chip, and I tried to grab the latest driver from the website, and it appeared to install, but nothing. There's also nothing listed under Sound and ... in the Device Manager. I've tried to manually include a legacy driver, which worked for RealTek but not for the Cirrus driver. Of course it said there was no RealTek hardware install, which makes me think it's a Cirrus chip. Any further suggestions or thoughts would be really appreciated. This is a Mac Mini 1.66. I'm also not sure how to be able to detect what card is integrated into the system, so that would be helpful too (remembering that there's no driver installed). Even just to get the chip type would be great to confirm.

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• F5 BigIP upgrade from 9.x to 10.x

  - by mbuk2k

  Having a few difficulties upgrading a Big IP 3400 from 9.4.8 to any version 10.x image. The following are the versions I've tried: 10.1.0.3341.0 10.2.2.763.3 10.2.3.112.0 10.2.4.577.0 To upgrade I'm running the following command: image2disk --format=volumes BIGIP-10.1.0.3341.0.iso Obviously replacing the version number with the relevant image I'm trying to upgrade to each time. The F5 reboots, and starts copying packages however after 30 seconds or so just stops copying. The cursor in the console is still flashing but no matter how long it's left, the package doesn't copy. It seems to be a different package with each version/image (but always the same package per version) at point of freezing, which I'm guessing is suggesting a space issue? I've checked free space on the device and it has over 2GB free at root which should surely be enough? If anyone has any advice or pointers, it would be kindly appreciated. Thank you

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• Installing SDM on a Cisco 2821 ISR

  - by Sam Sanders

  I trying to change the configuration of our router, it's a Cisco 2821 Integrated Services Router. I don't know much about Cisco products. While looking at the PDF manual for the router I notices it talked about SDM Security Device Manager. But when I point my web browser at the IP address of the router, it give me a very simple web interface. It's sort of like a string builder for CLI commands. I'm guessing SDM was not installed on it. So my question how would I go about do that? I found this link (below), but I'm a bit new to networking. So any advice would be welcome. http://www.cisco.com/en/US/docs/routers/access/cisco_router_and_security_device_manager/software/quick/guide/SDMq7.html

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• Does using a single cable to connect two switches create a bottleneck?

  - by Nick

  I realise this may be a stupid question for some, but it's something I've always wondered about. Let's say we have two gigabit switches and all of the devices on the network are also gigabit. If 10 computers connected to switch A need to transfer large amounts of data to a server on Switch B (at the same time), is the maximum transfer speed of each connection limited by the bandwidth of the connection between the two switches? In other words, would each computer only be able to transfer at a speed of one gigabit divided by the 10 machines trying to use the "bridge" between switches? If so, are there any workarounds so that every device can use it's maximum speed from point to point?

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• Separating user resources - Windows Server 2008 (Terminal Server)

  - by Christopher Wilson

  At the moment I am running a Windows Terminal Server 2008 for around 10 clients that use the server to run programs and access data. Is there anyway to separate the resources of each user so that they do not impact each other in terms of resources. User 1: Opens program User 2: Notices slow down I have looked into using Windows System Resource Manager but do not know if it provides what I need and if there are any other 3rd party tools that also provide this functionality. Any answer is appreciated. Server Specs: HP ProLiant ML110 G7 Processor: Intel® Xeon® E3-1220 (4 core, 3.1 GHz, 8MB, 80W, 1333/t) RAM: 12GB DDR3 ECC 1TB HDD

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• Apache is running; however, it reports that it is not, and it will not restart.

  - by solo

  Apache is running; however, it reports that it is not, and it will not restart. # /etc/init.d/httpd status httpd.worker is stopped # /usr/sbin/lsof -iTCP:80 COMMAND PID USER FD TYPE DEVICE SIZE NODE NAME httpd.wor 1169 root 3u IPv6 2974 TCP *:http (LISTEN) httpd.wor 1211 daemon 3u IPv6 2974 TCP *:http (LISTEN) httpd.wor 1213 daemon 3u IPv6 2974 TCP *:http (LISTEN) httpd.wor 1215 daemon 3u IPv6 2974 TCP *:http (LISTEN) httpd.wor 1352 daemon 3u IPv6 2974 TCP *:http (LISTEN) #/etc/init.d/httpd restart Stopping httpd: [FAILED] Starting httpd: [Wed Mar 24 10:33:51 2010] [warn] module proxy_ajp_module is already loaded, skipping (98)Address already in use: make_sock: could not bind to address [::]:80 (98)Address already in use: make_sock: could not bind to address 0.0.0.0:80 no listening sockets available, shutting down Unable to open logs [FAILED] OS: Linux DISTRO: CENTOS 5 Restarting the server didn't help, nor did killing apache and starting it. Any idea what is causing this inconsistency?

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• NFS-Root not working when booting over PXE

  - by Randy

  I am desperately trying to get a diskless client running over PXE-Boot using a NFS-Share as a root file system. I did this before some years ago but for some reason I am stucked at this since days. The TFTP-Server itself is running fine and booting a netinstaller works also fine. The kernel and initrd are loaded also but the bootprocess stops with this (screenshot) kernel panic. I'm using the squeeze standard i386-Kernel and I have prepared the initrd with this config: MODULES=most BUSYBOX=y KEYMAP=n COMPRESS=gzip BOOT=nfs DEVICE= NFSROOT=auto I also tried MODULES=netboot with the same outcome. My PXE-configuration looks like this: LABEL linux KERNEL diskless/debian-default/vmlinuz-2.6.32-5-686 APPEND root=/dev/nfs initrd=diskless/debian-default/vmlinuz-2.6.32-5-686 nfsroot=192.168.140.2:/storage/nfs-boot-images/default-squeeze ip=dhcp rw Furthermore I have captured the network communication of the client via tcpdump and learned that the client isn't even trying to connect to the NFS-share. Does anybody has got an idea what is going wrong here?

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• ECMP Load Balancing in JUNOS

  - by SpacemanSpiff

  I'm trying to figure out how to use ECMP load balancing in JUNOS. I know this isn't the best way to load balance, but its quick and dirty and gets done what I need to. In ScreenOS this was pretty easy. Device: SRX220 JunOS: 10.3R2.11 Here's what I've got so far: routing-options { static { route 0.0.0.0/0 { next-hop [ 1.1.1.1 1.1.1.2 ]; metric 10; } } maximum-paths 2; Will that do it? Tom

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