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• Server memory issues, and expected level of service from hosting company

  - by Greg

  I'm involved in maintaining an Ubuntu VPS which runs our django websites (nginx/apache/mod_wsgi) and we've been having some memory spikes which have either caused the database to die, or induced kernel panic when the memory management system can't find any killable processes. I'm working on fixing the memory spikes, but I'm wondering whether there's anything I can do to better deal with the problem if it occurs again. Are there any tools I could use to detect the memory spikes and then, say, kill the offending process and email the server admin to fix it up? Killing off one website so that the server can remain operational is certainly preferable to the whole thing falling over. Also, we were charged $600 for after-hours service because we had to get the hosting company to restart the server - is this standard practice among hosting companies? Another provider I work with provides a panel with which I can stop and start the server myself, and given that a restart was all that was needed, $600 seems mightily excessive. (That's NZD, it's around $445 USD)

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• Creating floppy drive special devices under Quantal

  - by JCCyC

  First, I'd like for the various special devices for different floppy capacities (like /dev/fd0u720 etc.) to be available. I tried to adapt some udev rules I found online. I tried this, which I saved as /etc/udev/rules.d/70-persistent-floppy.rules: # change floppy device ownership and permissions # default permissions are 640, which prevents group users from having write access # first fix primary devices (/dev/fd0, /dev/fd1, etc.) # also change group ownership from disk to floppy SUBSYSTEM=="block", KERNEL=="fd[0-9]*", GROUP="floppy", MODE="0660" # next recreate secondary devices (/dev/fd0u720, /dev/fd0u1440, etc.) SUBSYSTEM=="block", KERNEL=="fd[0-9]*", ACTION=="add", RUN+="create_floppy_devices -c -t $attr{cmos} -m %M -M 0660 -G floppy $root/%k" But to no avail. It seems the create_floppy_devices script isn't provided with 12.10. How do I obtain it? Second: I'm using MATE, and whenever I log in I get a message box saying it tried to mount the drive but failed. How do I disable this? Third (which is probably related to the second): Whenever there's a disk in the drive, the motor won't stop spinning. If I do a mdir of it, after it returns, the motor stops, and then starts again. I suspect there's some process in MATE doing this. UPDATE: For CentOS 6 (who does have a create_floppy_devices program) the following rules file worked. Saved as /etc/udev/rules.d/98-floppy.rules: # change floppy device ownership and permissions # default permissions are 640, which prevents group users from having write access # first fix primary devices (/dev/fd0, /dev/fd1, etc.) # also change group ownership from disk to floppy KERNEL=="fd[0-9]*", GROUP="floppy", MODE="0660" # next recreate secondary devices (/dev/fd0u720, /dev/fd0u1440, etc.) # drive A: is type 4 (1.44MB) - add other lines for other drives KERNEL=="fd0*", ACTION=="add", RUN+="/lib/udev/create_floppy_devices -c -t 4 -m %M -M 0660 -G floppy $root/%k"

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• FreeDOS reinstallation -- accidental script change

  - by jerry2144

  I'm extremely new to FreeDOS and I got a new HP desktop computer with the FreeDOS operating system. I messed up and accidentally changed its scripts and messed around with it's boot order. Long story short, I'm getting a disk error when I boot up. I believe I need to just reinstall FreeDOS and all should be good, but I want to get someone's opinion with much more experience than my own. Also, if someone could guide me through the installation process using a DVD installer that would be amazing. I have already downloaded the FreeDOS iso image and unzipped it. I don't know what I need to do now though. Should I even have unzipped it?

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• Need to run a .sh as root on boot or login

  - by Graymayre

  Still new with linux and running ubuntu 12.10 I have a wireless stick (ae2500) which has known issues that has been partially solved using ndiswrapper. However, to use it I must run the same scripts every time I reboot, effectively uninstalling and reinstalling the driver. I made a .sh file to run every time to make it easy, but I must do the sudo login everytime. There are three solutions I am looking for and although not all are necessary to solve this particular problem, I would still like to know them all for learning purposes. run scripts or file.sh on boot (as well as other programs) run scripts or file.sh automatically with root privileges make the install permanent so as not to have to go through the process every time. Any additional information that can help me regarding this that I did not think to ask (including streamlining my commands), or general knowledge, would be greatly appreciated. Following are the contents of the file. I pretty much just made it as I would have entered it. cd ~/ndiswrapper-1.58rc1 sudo modprobe -rf ndiswrapper sudo rm /etc/modprobe.d/ndiswrapper.conf sudo rm -r /etc/ndiswrapper/* sudo depmod -a sudo make uninstall sudo make sudo make install sudo ndiswrapper -i bcmwlhigh5.inf ndiswrapper -l sudo modprobe ndiswrapper

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• Tracking down Data Execution

  - by Agnel Kurian

  I have some malware infecting one of our machines at home. It first showed up as winulty.exe. After investigating, I am of the opinion that winulty.exe itself is an uninfected file but is being modified after it has loaded into memory. Turning on Data Execution Prevention for all processes and services has confirmed this to be true. How do I track down the process responsible for this? I've used File Monitor from sysinternals.com to monitor winulty.exe and see this being accessed by the svchost.exe instance hosting most of the system services and also by dfrgntfs.exe. How do I know which service or which DLL has been infected?

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• Kill xserver from command line (init 3/5 does not work)

  - by John Smith

  Hi, I'm running Linux Mint 10, although I've had this same issue with other variants of Linux. I've been told/found while researching that if the X server hangs or otherwise errors, one can drop to a root prompt, usually at another tty, and execute init 3 (to drop to single user mode) and then init 5 to return to the default, graphical session. Needless to say, I've tried this before in multiple configurations on multiple machines to no avail. The only feedback I receive form executing those two commands is a listing of VMWare services (from a kernel module) that are stopped and then restarted. Note: If I run startx (either before or after init 3), then I am told that the xserver is still running and that I should remove /tmp/.X0-lock. Having tried that, it removes that error message, but claims that the xserver cannot be attached as another instance is running. How do I kill the xserver completely? Can I killall some process name?

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• Can I pass the LHS of a cfengine3 processes: line to the RHS?

  - by joeforker

  I'm using cfengine to start the foobar process. Apparently the LHS is discarded when I use process_select? Can I simply pass the LHS to a function, rather than having to put the command match pattern in a body argument? bundle agent foobar { processes: "foobar" # documented way would be to use .* here process_select => command("foobar"), restart_class => start_foobar; commands: start_foobar:: "/usr/bin/foobar"; } body process_select command(c) { command => "$(c)"; process_result => "command"; }

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• UDP Reverse Proxy

  - by user180195

  I have found a way to make reverse-proxy to an external IP. Here is how someone making a request will see it's request being passed: Clients sends request Request reaches the Datacenter one in some place That datacenter, acting as a reverse proxy will redirect the same exact request to another datacenter. The datacenter will then process the request Although, this only works with TCP/HTTP (Looking currently at HaProxy). I am hosting game servers at the other datacenter (where the proxy is not) that are using UDP protocol. Do you know how can I setup a reverse proxy using the UDP protocol.

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• OS2/Warp - Remotely Stop and Restart a Program

  - by Justin S

  Our current phone system runs off of a legacy OS2/Warp box. Periodically we have to log into the machine and restart OS2RSD.exe and then start it again and the phone system starts working again. The problem is we have to physically get in front of the box and use the GUI to stop and restart the process. Is it possibly to remotely run a script to kill OS2RSD.exe if its running and then start it again? I have been unable to figure this out on my own. The OS is OS2/Warp Version 3 if that helps.

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• Mac OS X: pushing all traffic through a VMWare VM

  - by bj99

  I want to set up an Astaro (Sophos) UTM in a Virtual Machine. The Setup should be at the end the following: Cable Modem (one IP adress) | [Ethernet] Sophos UTM (running as VM [VMWare Fusion 5] on the MacMini) | [WIFI] Airport Express v2 (for sharing Local Network to wireless and wired clients) 1)| [WIFI] 2)| [Ethernet over Thunderbolt Ethernet Adapter]* Clients MacMini (Local File Server) *To have the Mini also protected behind the UTM So the setup process for the UTM works fine, but then the problems start: I just have one external IP (from my cable modem provider)== So if I put the VM in briged mode my Internet connection drops, because the MacMini also has its IP adress. If I put the VM to NAT mode the Mini itself is not protected by the UTM So: is there a way to hide the en0 interface(Ethernet) and the en1 interface (Wifi) from the MacMini, so that they not even appear in System Preferences Network section but are available to the VM? That way the Mini must connect to the en2 interface (Thunderbolt adapter) to make any Internet/LAN connection and I just use the given single IP from the Cable Modem. Thaks for any suggestions... Sebastian

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• Error encountered compiling kernel 2.6.35-25.44

  - by Matt

  I downloaded the linux-source-2.6.35 package and tried to compile it using the command "fakeroot make-kpkg --append-to-version=.dbg kernel_image kernel_source kernel_headers --initrd" after "make menuconfig". The image .deb file is produced and installs fine, but an error stops the build process while trying to make the source package: scripts/Makefile.clean:17: /home/ade/linux-source-2.6.35/debian/linux-source-2.6.35.10.dbg/usr/src/linux-source-2.6.35.10.dbg/crypto/Makefile: No such file or directory make[1]: *** No rule to make target `/home/ade/linux-source-2.6.35/debian/linux-source-2.6.35.10.dbg/usr/src/linux-source-2.6.35.10.dbg/crypto/Makefile'. Stop. make: *** [_clean_crypto] Error 2 Sure enough, the folder linux-source-2.6.35/debian/linux-source-2.6.35.10.dbg/usr/src/linux-source-2.6.35.10.dbg/crypto does not exist (although all of the other kernel source folders appear to be there). I haven't even been able to determine where the folder is supposed to be copied over, or what's supposed to invoke clean. Am I doing something wrong here? It should be noted that I am running 10.04.

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• How does one find out which application is associated with an indicator icon in Ubuntu 12.04?

  - by Amos Annoy

  It is trivial to do this in Ubuntu 10.04. The question is specific to Ubuntu 12.04. This has nothing to do (does it?) with right click. How can an indicator's icon in Ubuntu 12.04 be matched with the program responsible for it's manifestation on the top panel? A list of running applications can include all processes using System Monitor. How is the correct matching process found for an indicator? (the examination of SM points out a rather poignant factor in the faster depletion and shortened run time on battery - the ambient quiescent CPU rate in 12.04 is now well over 20% when previously it was well under 10% in 10.04, between 5% and 7%!) (I have a problem with the battery indicator - it sometimes has % and other times hh:mm - it is necessary to know the ap. & v. to get more info on controlling same. ditto: There are issues with other indicator aps.) Details from: How can I find Application Indicator ID's? suggests looking at: file:///usr/share/indicator-application/ordering-override.keyfile [Ordering Index Overrides] nm-applet=1 gnome-power-manager=2 ibus=3 gst-keyboard-xkb=4 gsd-keyboard-xkb=5 which solves the battery identification, and presumably nm is NetworkManager for the rf icon, but the envelope, blue tooth and speaker indicator aps. are still a mystery. (Also, the ordering is not correlated.) Mind you, it was simple in the past to simply right click to get the About option to find the ap. & v. info. browsing around and about: file:///usr/share/indicator-application/ordering-override.keyfile examined: file:///usr/share/indicators file:///usr/share/indicators/messages/applications/ ... perhaps?/presumably? the information sought may be buried in file:///usr/share/indicators

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• Terminal closing itself after 14.04 upgrade

  - by David

  All was fine in 12.04, in this case I'm using virtualbox in Windows. Last days the warning message about my Ubuntu version no longer being supported was coming up pretty often, so, yesterday I finally decided to upgrade. The upgrading process ran ok, no errors, no warnings. After rebooting the errors started to happen. Just after booting up there were some errors about video, gnome, and video textures (sorry I didn't care in that moment so I don't remember well). Luckly that went away after installing VirtualBox additions. But the big problem here is that I can't use the terminal. It opens Ok when pressing control+alt+t, but most of the commands cause instant closing. For example, df, ls, mv, cd... usually work, although it has closed few times. But 'find' causes instant close. 'apt-get' update kills it too, just after it gets the package list from the sources, when it starts processing them. I've tried xterm, everything works and I have none of that problems. I have tried reinstalling konsole, bash-static, bash-completion, but nothing worked. I have no idea what to do as there is no error message to search for the cause. It seems something related to bash, but that's all I know.

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• How to determine the best byte size for the dd command

  - by James

  I know that doing a dd if=/dev/hda of=/dev/hdb does a deep hard drive copy. I've heard that people have been able to speed up the process by increasing the number of bytes that are read and written at a time (512) with the "bs" option. People have suggested that the optimal byte size is due to sector size. I personally think it would have something to do with the amount of cache that the hard drive has. My question is: What determines the ideal byte size for copying from a hard drive? and Why does that determine the ideal byte size?

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• How do I make a Windows virtual machine replicate to another datacenter/cloud?

  - by zippy

  We have a Windows 2008 VM running IIS and SQL Server Express (it's an all-in-one web application). We need to have another copy at our secondary datacenter site. What is the best way to do this? It doesn't have to be running all the time but it has to have almost the latest copy of the current VM. I took a look at VMWare Fault Tolerance and after the heart attack at the price I starting looking for another solution. If need be I wouldn't mind copying it over to a cloud VM provider, if I can find one that lets me copy my own VMs up and start them up without any conversion process.

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• Webserver insists on opening "blog1.php" instead of "index.php"

  - by pepoluan

  I'm at my wits' end. I have just ripped out a website and in the process of rebuilding everything. Previously, the 'home page' of the website is a blog, with the address "www.mydomain.com/blog1.php". After exporting everything, I deleted the whole directory, and -- based on request -- immediately create a blog/ directory. The idea is to get the blog back up as soon as possible, and temporarily redirect people accessing www.mydomain.com to the blog. Accessing the blog via http://www.mydomain.com/blog/ works. So I put in an index.php file containing a (temporary) redirect to the blog's address. The problem: The server insists on opening blog1.php instead of index.php. Even after we deleted all the files (including .htaccess). And even putting in a new .htaccess file with the single line of DirectoryIndex index.php doesn't work. The server stubbornly wants blog1.php. Now, the server is actually a webhosting, so I have no actual access to it. I have to do my work via cPanel. Currently, I work around this issue by creating blog1.php; but I really want to know why the server does not revert to opening index.php. Did I perhaps miss some important settings in the byzantine cPanel menu page?

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• XPath & XML EDI B2B

  - by PearlFactory

  GoodToGo :) Best XML Editor is Altova XMLSpy 2011 http://www.torrenthound.com/hash/bfdbf55baa4ca6f8e93464c9a42cbd66450bb950/torrent-info/Altova-XMLSpy-Enterprise-Edition-SP1-2011-v13-0-1-0-h33t-com-Full For whatever reason Piratebay has trojans and other nasties..Search in torrent.eu for Altova XMLSpy Enterprise Edition SP1 2011 v13.0.1.0 Also if you like the product purchase it in a Commercial Enviroment Any well structured/complex XML can be parsed @ the speed of light using XPATH querys and not the C# objects XPathNodeIterator and others etc ....Never do loops  or Genirics or whatever highlevel language technology. Use the power of XPATH i.e Will use a Simple (Do while) as an example. We could have many different techs all achieveing the same result Instead of   xmlNI2 = xmlNav.Select("/p:BookShop")         if (xmlNI2.Count != 0)            {                                 while ((xmlNI2.MoveNext()))              string aNode =xmlNI2.SelectSingleNode('Book', nsmgr); if (aNode =="The Book I am after")       Console.WriteLine("Found My Book);   This lengthy cumbersome task can be achieved with a simple XPATH query Console.WriteLine((xmlNavg.SelectSingleNode("/p:BookShop/Book[.='The Book I am aFter ']", nsmgr)).Value.ToString()); Use the power of the parser and eliminate the middleman C#/MSIL/JIT etc etc Get Started Fast and use the parser as Outlined 1) Open XML and goto Grid Mode 2) Select XPATH tab on the bottom viewer/window as shown  From here you get intellisense and can quickly learn how to navigate/find the data using XPATH A key component to Navigation with XPATH is to use the "../ " command . This basically says from where I am now go up 1 level . With Xpath all commands are cumalative. i.e you can search for a book title @ the 2nd level of the XML and from there traverse 15 layers to paragraphs or words on a page with expression validation occuring throughout this process etc  (So in essence you may have arrived @ a node within the XML and have met 15 conditions along the way ) Given 1-2 days with XmlSpy and XPATH you unlock a technology that is super fast and simple to use. XML is a core component to what lays under the hood of so many techs. So it is no wonder that you want to be able to goto  the atomic level to achieve the result you want Justin P.S For a long time I saw XML as slow and a bit boring but now converted

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• team viewer 8 beta wont run

  - by Conner Jones

  I installed team viewer 7 and then one of my friends using windows got version 8 so I installed the beta of version 8 for linux. When I try to run it for terminal I get these errors i atempted to do as the comment bellow said and when trying to run teamveiwer i stil got an error conner@DemonicGrace:~$ teamviewer Init... Checking setup... Launching TeamViewer... wine: cannot find L"C:\windows\system32\winemenubuilder.exe" err:wineboot:ProcessRunKeys Error running cmd L"C:\windows\system32\winemenubuilder.exe -a -r" (2) err:winedevice:ServiceMain driver L"MountMgr" failed to load err:secur32:SECUR32_initSchannelSP libgnutls not found, SSL connections will fail fixme:heap:HeapSetInformation (nil) 1 (nil) 0 fixme:ole:CoInitializeSecurity ((nil),-1,(nil),(nil),0,3,(nil),0,(nil)) - stub! fixme:heap:HeapSetInformation (nil) 1 (nil) 0 fixme:process:SetProcessShutdownParameters (00000100, 00000000): partial stub. fixme:resource:GetGuiResources (0xffffffff,0): stub fixme:win:EnumDisplayDevicesW ((null),0,0x32df64,0x00000000), stub! fixme:win:EnumDisplayDevicesW (L"\\.\DISPLAY1",0,0x32dc1c,0x00000000), stub! fixme:win:EnumDisplayDevicesW ((null),1,0x32df64,0x00000000), stub! please help me out if anyone has ideas im more than willing to listen

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• adding a route entry to linux routing table

  - by netg

  hi, I have two systems with ip address say 64.103.56.1(A)(Dev name -wlan0) and 64.103.225.18(B),now what i want is , everytime I ping B from my system A, it has to be routed via a router say with address 10.0.0.251(C)(I want this to be my next hop to reach B) , but this router is on a different subnetwork than the two systems.How do I do this? /* Things I tried: I used 'route add -host B gw C wlan0', and got an error saying " no such process exist or no such device found". Tried ping C and traceroute and found the gw addr at my side is some 63.103.236.3(D), so added another entry route add -host C gw D wlan0, I was able to do this without any error! */

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• Smooth waypoint traversing

  - by TheBroodian

  There are a dozen ways I could word this question, but to keep my thoughts in line, I'm phrasing it in line with my problem at hand. So I'm creating a floating platform that I would like to be able to simply travel from one designated point to another, and then return back to the first, and just pass between the two in a straight line. However, just to make it a little more interesting, I want to add a few rules to the platform. I'm coding it to travel multiples of whole tile values of world data. So if the platform is not stationary, then it will travel at least one whole tile width or tile height. Within one tile length, I would like it to accelerate from a stop to a given max speed. Upon reaching one tile length's distance, I would like it to slow to a stop at given tile coordinate and then repeat the process in reverse. The first two parts aren't too difficult, essentially I'm having trouble with the third part. I would like the platform to stop exactly at a tile coordinate, but being as I'm working with acceleration, it would seem easy to simply begin applying acceleration in the opposite direction to a value storing the platform's current speed once it reaches one tile's length of distance (assuming that the tile is traveling more than one tile-length, but to keep things simple, let's just assume it is)- but then the question is what would the correct value be for acceleration to increment from to produce this effect? How would I find that value?

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• Upgrade went wrong, laptop essentially 'bricked'

  - by hexagonheat

  I have an old netbook I was trying to upgrade from 10.04 to 10.10. Ubuntu was in the process of upgrading when everything completely froze. I left it sit for an hour but it would not respond to anything. So I powered down the machine and it didn't have the necessary files to run Ubuntu. I went to the terminal and it told me to put in some command that I can not remember to 'rebuild' something. That takes me to now, when I turn on the laptop it comes up with a screen "GNU GRUB version 1.98+20100804-5ubuntu3.3" and has a bunch of options such as: 1. Ubuntu, with Linux 2.6.35-32-generic 2. Ubuntu, with Linux 2.6.35-32-generic (recover mode) etc. (there are like 15 of these with different numbers after 2.6.35 and the word 'generic'. It doesn't seem to matter what I pick, it will go to the "Ubuntu" loading screen with the colored dots but then every time it will freeze and I have to reboot to the same thing. I can't seem to get a terminal prompt anywhere either. Any ideas? I can't think of what to do :(

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• Offshoring: does it ever work?

  - by DanSingerman

  I know there has been a fair amount of discussion on here about outsourcing/offshoring, and the general opinion seems to be that at best it is difficult, and at worst it fails. I have direct experience of offshoring myself; a previous company where I was a dev manager wanted to send some development offshore, and we ran a pilot scheme to see how well it would work. Of course it was a complete failure, although it is not completely clear to me whether this was down to the offshore devs being less talented, the process, or other factors (no doubt it was really a combination). I can see as a business how offshoring looks attractive (much lower day rate), but as far as I can see, the only way it could possibly work is if you do exceptionally detailed design up front, with incredibly detailed specifications; and by the time you have invested in producing that, you have probably spent as nearly as much as if you had written the actual code locally (which I think is an instance of No Silver Bullet) So, what I want to know is, does anyone here have any experience of offshoring actually working ever? Especially if there are any success stories of it working in a semi-agile way? I know there are developers here from all over the World; has anyone worked on an offshore project they consider successful?

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• Suphp connection reset by peer in error logs

  - by trante

  In my Linux server's logs I have this record nearly every 5 minutes. I couldn't find the reason for two weeks and I would be very happy if you can recommend me a way to diagnose the problem. It is inside error_log file. I use php 5.3.8 and litespeed. 2012-09-03 16:01:28.399 [INFO] [95.7.223.91:63814-0#APVH_example.com] connection to [/tmp/lshttpd/ APVH_example.com_Suphp.sock. 781] on request #151, confirmed, 0, associated process: 845244, running: 0, error: Connection reset by peer!

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• ssh crashes connecting using host names on windows

  - by AliGibbs

  On a new install of Windows Server 2008, I attempting to use ssh to connect to another host. I have installed putty/openssh. This works without a problem when trying a command such as: ssh 192.168.0.2 However, this will crash when trying something like: ssh testserver with the error as follows in the windows event viewer: Faulting application ssh.exe, version 0.0.0.0, time stamp 0x40843497, faulting module kernel32.dll, version 6.0.6001.18000, time stamp 0x4791a76d, exception code 0xc0000005, fault offset 0x0004bbb8, process id 0xe94, application start time 0x01cb873195e795d5. Any suggestions? thanks in advance

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• Reimage several of the same model PC by copying the hard disk

  - by Tim Lehner

  I have several of the same machine (Dell Precision T3500) that originally came with Windows 7 Pro (there is a Windows 7 Pro OA product key sticker on top of each one). These were initially downgraded to XP by a former IT colleague, but are now back in the pool of unused machines. I am looking to format and install Windows 7 Pro on one of them using the latest official Win7 installer ISO with SP1 and then clone the hard drive to the other machines. The questions then, are: Does this even make sense, or is there a better way to do this considering I'm only doing it to 6 machines? Does this jive with MS licensing (we are the original purchaser of the machines, and thus, presumably, the license holder...but I'm no expert)? Is it possible to apply the individual 25-char product keys to the cloned machines after cloning? How far can I go in the config process (installing corporate standard apps and such) before I have to clone to the other machines considering the licensing/key questions?

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