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• Booting a Windows 7 installation on different hardware

  - by tomfanning

  I'm in a situation where I could do with very quickly migrating a Windows 7 (RTM x64) installation from one machine to another. What options are open to me in terms of getting W7 to boot after the drive is picked up and moved from one box to another? I thought it was supposed to be a little less sensitive to this kind of move than XP, but it doesn't work - it is stuck in a reboot loop and never reaches a GUI. Tried a few things so far, none of which have worked: Changed SATA mode in the BIOS of the target machine between ATA and AHCI run Windows 7 Startup Repair tried safe mode, no change (I will keep this list up to date as suggestions come in) UPDATE: I can confirm this reboot loop is due to STOP error 0x0000007B, and these codes follow: 0xFFFFF880009A98E8 0xFFFFFFFFC0000034 0x0000000000000000 0x0000000000000000 UPDATE: I didn't get anywhere on this and I ended up just rebuilding the machine. I think it should be theoretically possible, so I'm going to leave the question open in case someone comes along in future with an answer.

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• MAAS fails to Commission nodes

  - by user3644848

  I'm evaluating MaaS/Juju. I followed instructions in this link http://maas.ubuntu.com/docs1.5/install.html to setup MaaS. I'm running this in Oracle VirtualBox environment so Power options are not configured for the VMs. PXE booting VM works fine. The node shuts down itself and registers with MaaS in Declared state. Issues: a) When I Commission the VM (which is in the Declared state), first it gets IP-Config: no response after 60 secs - giving up errors. (See link below for a screenshot). b) Fails to mount the boot device and drops into initramfs prompt. I've copied logs here: https://www.dropbox.com/sh/5gy9nnonbnccufo/AAD9o4awSOtyaCCmRe5q7rBva Any help to get past this is greatly appreciated. Thanks!

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• How to see whats taking up space on your hard drive

  - by sam

  Im thinking of switching to one of the macbook pro retinas with a 256gb ssd, im making the move from a 512gb hd, which at the moment is split into a 60bg windows partition (which i dont think im going to have on my new machine) and a 440gb main partition of the main partition ive got 140gb free. So all in if i disregard the 60gb windows part ive got about 200gb free so im using 300gb, which is still a bit to much, ive had this machine 4/5 yrs so its likely to be clogged with files that i no longer need, is there a tool that i can use to view my current hd and see whats taking up the most room, so i can begin to see where i can cut down ? just for a bit of background my current machine runs osx.

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• Strange behavior of excel 2007 on WinXP

  - by bdecaf

  I'm on a machine that had quite some bloat ware and no update in ages. I made all the updates, removed the bloatware and cleaned using ccleaner. So far so good. Now excel shows some really strange behavior when I open .xls files through windows. The current behavior is: it opens a new excel process window which will then stay empty. One has then to drag the xls file into the window to open it. I would like to restore the default behavior. So far I have tried: running the Microsoft Office Diagnosis copied excel related registry keys from a machine with working excel and imported them had a look into the registry entry for .xls files myself - which seems correct. It was of no use and I'm out of ideas. I would try to avoid a reinstall as we have a very bureaucratic IT department and the machine then would be gone for some undetermined time period. So any idea what to do would be great.

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• How can I see logs in a server after a kernel panic hang?

  - by Low Kian Seong

  I am running a production gentoo Linux machine, and recently there was a situation where the server hung in my co-located premises and when I got there I noticed that the server was hung on what appeared to be a kernel panic hang. I rebooted the machine with a hard reboot and was disappointed to find out that I could not find a shred of evidence anywhere on why the machine hung. Is it true that when I do a hard reboot the messages itself will get lost or is there a setting I can do somewhere say in syslog-ng or maybe in sysctl to at least preserve the error log so that I can prevent such mishaps from happening in the future ? I am running a 2.6.x kernel by the way. Thanks in advance.

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• how to stream audio and video files, but use any media player on Windows (without using Windows file

  - by RamyenHead

  I want to access and play media files on machine S (Windows XP) from machine C (Windows XP). Using Windows File Sharing ("share this folder" stuff), if it works, I would share the folder containing media files on machine S, and I would be able to play media files, sitting in front of C, using any media player I want. Windows somehow ensures that the remote files behave like local files. But Windows file sharing won't work for me, is there any alternative? If two machines were both Linux, I would install an SSH server on S and use Nautilus from C to access and play media files. The reason why I can't use Windows file sharing is, my campus use two different subnets, I have S and C on different subnets and it seems that the firewall governing the whole network in campus doesn't allow file sharing between different subnets. I tried changing Windows Firewall settings on S to allow C in, it still wouldn't work, so it must be the other firewall.

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• Is it possible to tunnel ICMP over TCP?

  - by Robert Atkins

  I don't want to tunnel TCP over ICMP (as ptunnel does), I want to go the other way around. I'm in the situation where I have TCP (HTTP) connectivity to a machine but an internal firewall over which I have no control is swallowing pings. The monitoring software I'm using appears to determine connectivity by attempting to send a ping before it tries to just connect to the web service on the target machine. It's failing this ping test and giving up. I believe if I could fool my monitoring software into thinking pings were getting through, it would then connect to the web service and be on its merry way. Anyone know how I can do this? I have SSH and root access on the destination machine.

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• Destination host unreachable, but the errorlevel is 0 (from a win7)

  - by Doron

  From a windows 7 machine, I ping a non existing ip address. C:ping 192.168.1.222 Pinging 192.168.1.222 with 32 bytes of data: Reply from 192.168.1.222: Destination host unreachable. Reply from 192.168.1.222: Destination host unreachable. Reply from 192.168.1.222: Destination host unreachable. Ping statistics for 192.168.1.222: Packets: Sent = 3, Received = 3, Lost = 0 (0% loss) Even though there is no reply, the errorlevel is set to 0. *what I am trying to do, is figure out if a remote machine is replying to ping. One of my test is to turn off the machine and ping it. For some reason, ping sets errorlevel to 0 *

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• Securing a persistent reverse SSH connection for management

  - by bVector

  I am deploying demo Ubuntu 10.04 LTS servers in environments I do not control and would like to have an easy and secure way to administer these machines without having to have the destination firewall forward port 22 for SSH access. I've found a few guides to do this with reverse port (e.g. howtoforge reverse ssh tunneling guide) but I'm concerned with security of the stored ssh credentials required for the tunnel to be opened automatically. If the machine is compromised (primary concern is physical access to the machine is out of my control) how can I stop someone from using the stored credentials to poke around in the reverse ssh tunnel target machine? Is it possible to secure this setup, or would you suggest an alternate method?

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• how to create a mirror of minimum size to install Ubuntu

  - by Registered User

  I need to create an http url at my laptop to have a Ubuntu installation begin within my laptop on a Xen environment. This is how the final thing will look like http://bderzhavets.wordpress.com/2008/10/28/install-ubuntu-intrepid-server-pv-domu-at-xen-33-port-via-httpgetco-centos-52-dom0/ the host and client are both going to be my laptop, I Google d and came across apt-mirror and some other packages. I do not want to archive entire 15 GB Ubuntu repositories on my machine. It is not possible to use a CD,ISO,loop mounted disk (reason mentioned below). I have tried using netboot image on local machine which failed because if you are attempting to create a virtual machine on a hardware which does not support VT virt-manager installer necessarily needs a URL of this sort http://archive.ubuntu.com/ubuntu/dists/hardy/main/installer-i386/current/images/netboot/ any other option to create guest OS is simply grayed out. The unfortunate part is my Ethernet connections do not work when I boot with Xen-4.0 and a pv-ops Dom0 kernel from Jeremy's tree.Which is where I have to do this work.So I have to create a URL structure which is similar to Ubuntu mirrors.So how can I do this in bare minimum so that at least the console boots and once the console comes I can do some work.

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• Do I really need Microsoft Updates?

  - by Tony Wong

  When I install a fresh copy of Windows XP Home (I bought it from the store.. not a copy), my PC rocks like lightening speed. But when I start installing all the updates, patches & less .NET 4.0 client (as the .NET 4.0 Client seems to bring machine to slow crawl). The PC starts to slow down.. like there are more resources to watch or something is happening in the background. So could I not get away with an awesome virus protector and an awesome firewall set-up and avoid all the patches? The machine I have is a quad 4, 4 GB RAM and 2.3 GHz process. Tons of room and the machine can run several applications at one time.. but when the updates happen.. it's s-l-o-w!

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• FTP Access Denied when uploading to server

  - by Albert

  Ok, here's the story. I have a server running FTP 'out there' I can connect to it using the admin account, browse files, download files. When I try to upload files, I get 550 Access Denied. I have tried through FileZilla and command line. I have windows firewall turned off (on my machine) I can UPLOAD files from another machine (using the same admin account) on our local network (that means, same public IP) what is the problem? I am running Windows 7, Build 7100 and the other machine on the network is running XP SP3 The thing that gets me though, is that this worked for the last probably 4 months, without a problem, I get back in the office after a weekend today and it won't work...

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• Gmail flagging emails as spam despite SPF being enabled and working perfectly

  - by Asif

  I have a website where people can recommend contents to their friends using their email. The issue is that emails are being flagged as spam whereas if I do the same from my development machine things are working out fine. I have enabled SPF and it is perfect. When sending through website, the email appears as this in Gmail Inbox: From [email protected] to [email protected]. When I send it from my development machine it appears as : From xyz.com via mywebsite.com to [email protected] mailed by mywebsite.com and this is exactly how I envisioned it. From what little I could figure out by looking at the source of emails in Gmail is that when sending from my development machine Gmail correctly recognizes my domain as mywebsite.com for which SPF is enabled and hence it treats it as genuine email. Whereas Gmail recognizes my domain as [email protected] when sent through the website. Can someone tell me why it does so? Any help would be really appreciated.

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• Bad request - Invalid Hostname Error when using ARR IP address

  - by syloc

  I'm trying to setup a simple ARR system. I have 1 ARR machine load balancing between 2 APP servers. I can reach the app sites if i use the server name of the ARR machine. (http://arrserver/app) But i can't do it with its IP address. (http://10.7.10.25/app). It gives the "Bad Request - Invalid Hostname". In the ARR machine i configured the default site's bindings to "All Unassigned","80" (default values). Do i need to change the binding rule or need additional url rewrite rules? And also, in the ARR server http://127.0.0.1/app doesn't work. But http://localhost/app works fine. Thx in advance

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• Cannot access internet or remote network after connecting to Windows VPN

  - by Kiewic

  I set up a VPN by creating an incoming VPN connection (VPN server) in my Windows 8 machine at home (not a Windows Server). I forwarded the PPTP port in my router (port 1723) to this machine and enabled PPTP passthrough. In a second Windows 8 machine out of home, I created an outgoing VPN connection (VPN client). And I am able to connect to my home VPN, but I don't have access to any home resource or even internet. This is the output of the client ipconfig: And this are the settings of my VPN server: UPDATE: My VPN server has assigned the 192.168.1.144 IP adress at my home network. So, I tried setting the "IP address assignment" range from 192.168.1.150 to 192.168.1.200. And when a VPN client gets connected, it gets an address in that range, but it doesn't make any difference.

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• Snow Leopard connecting to Unbuntu 10.04 through Samba failure -- need help fixing.

  - by Chris Altman

  I have a Ubuntu 10.04 web server. I want to connect to it with my OSX 10.6 machine and Finder. I have installed openSSH and Samba on the Ubuntu machine. In my smb.conf I have a Share Definition: [www] comment = Development Computer WWW path = /var/www writeable = yes browseable = yes allow hosts = 192.168.1. I can connect to the machine through Finder using a non-root user. When I attempt to add files thought Finder I get an "Insufficient Permissions" error. Please help. I am not sure if the issue is in the Samba configuration or OSX 10.6 Thank you

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• Adding Thunderbird-stable repository gives "can't find signing_key_fingerprint" error

  - by EBV2010

  I'm trying to install Thunderbird 11 on Kubuntu 10.04. I was able to do it on the machine I'm working on. To get a clean process that I can roll out to other clients, I re-installed the machine and repeated the process. This is what I did (I've left out the sudo for clarity): add-apt-repository ppa:ubuntu-mozilla-security/ppa apt-get update add-apt-repository ppa:mozilla-team/thunderbird-stable The last one resulted in this error: Error: can't find signing_key_fingerprint at https://launchpad.net/api/1.0/~mozilla-team/+archive/thunderbird-stable The machine as it was before re-installation gave no such message. It was built from the same sources. Bottomline: I got Thunderbird 11.0 to run on Kubuntu 10.04 but after re-installation, adding the repository gives an error and won't add. Is there a way to solve the signing_key_fingerprint error?

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• How do I restore a Dell Inspiron 1521 laptop to factory defaults?

  - by Solignis

  I got a Dell Inspiron 1521 laptop from a local computer store that a buddy of mine works at. When I turned it on I had come to realize it has not been wiped and reverted to factory defaults. How can revert the machine to factory defaults? I do not have any of the CDs that came with the machine, all I have is the computer and the power brick. But if it helps any I can able to get into Windows so I full access to the machine.

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• See network computer description in Explorer

  - by John Gardeniers

  When viewing the list of network computers in Windows Explorer on a Win 7 machine there appears to be no way of readily seeing the description field, which makes that pretty well useless. I believe this problem started with Vista but I'm seeing it for the first time because I was fortunate enough to skip over Vista. We're currently rolling out Win 7 on new boxes and although I'm changing the naming system to something more sensible, the old boxes have names such as FWS01, FWS02, etc. Managing a network of computers with such names is made more difficult when you can't readily see who's machine each one is. Googling the problem brought up a workaround involving creating a shortcut on an XP machine and copying that to the Win 7 box but that's a long way from ideal. Is there some kind of hack that can be applied to machines, the operator of which needs to be able to see the description field?

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• iptables: built-in INPUT chain in nat table?

  - by ughmandaem

  I have a Gentoo Linux system running linux 2.6.38-rc8. I also have a machine running Ubuntu with linux 2.6.35-27. I also have a virtual machine running Debian Unstable with linux 2.6.37-2. On the Gentoo and Debian systems I have an INPUT chain built into my nat table in addition to PREROUTING, OUTPUT, and POSTROUTING. On Ubuntu, I only have PREROUTING, OUTPUT, and POSTROUTING. I am able to use this INPUT chain to use SNAT to modify the source of a packet that is destined to the local machine (imagine simulating an incoming spoofed IP to a local application or just to test a virtual host configuration). This is possible with 2 firewall rules on Gentoo and Debian but seemingly not so on Ubuntu. I looked around for documentation on changes to the SNAT target and the INPUT chain of the nat table and I couldn't find anything. Does anyone know if this is a configuration issue or is it something that was just added in more recent versions of linux?

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• Can't access LAN computers with SSH

  - by endolith

  I got a new Windows 7 machine, and was using VNC,SSH etc to connect to my Ubuntu machine, and it worked fine previously. Now it doesn't work if I use the machine's hostname or local IP, but if I use the DynDNS name, it works. I can also access it from my Android phone using the local hostname over SSH. If I try to connect with SSH to the hostname, it says "Host does not exist". VNC says "Failed to get server address". NX says "no address associated with name", and I don't see it in Windows' "Network" folder. I've rebooted everything. I've turned off Windows firewall. It was working fine a few days ago, but now it's not. How do I figure out what's blocking it?

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• Nexenta under KVM?

  - by Nick

  I have an Ubuntu Server running KVM. I'd like to get the benefits of ZFS so I was thinking of installing a virtual machine under KVM running Nexenta (or NexentaStor), allowing that virtual machine to have raw access to a couple of physical hard disks, and then having it share its file system with NFS so that Ubuntu can access it. I've never tried setting up KVM so that the virtual machine has access to physical drives. Does this sound feasible, and is there anything I need to watch out for? Has someone already documented something like this? Does Nexenta/ZFS function basically as well in the virtual environment as if they were running base bones? I can take a small performance hit, but I don't want it to not be as reliable because of the virtualization. Thanks.

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• Ubuntu 12.04 desktop, VNC viewer not refreshing screen

  - by user73279

  I've had this issues across multiple machines and multiple versions of Ubuntu desktop (all 10.04 or later). Usually it happens with an old laptop I've put Ubuntu on but now it's happening on my primary dev machine (a quad-core PC recently upgraded to Ubuntu 12.04 desktop). The problem is this - I can connect to the machine and login with the password, the initial screen looks fine but never refreshes. I can see the monitor for the machine across the room and can see the mouse move and the menus pop up but the image of the screen on the PC in front me running the VNC viewer never updates. So the mouse and keyboard commands are working. Ubuntu 12.04 Desktop Ultra VNC Viewer (also seen with RealVNC's free VNC viewer) Desktop Sharing Static IP on eth0; Dynamic ID on eth1 I think it is an Ubuntu config issue because this PC used to work just fine with 9.04, 10.04, and 11.10 (over the past couple of years). I've also had a couple of laptops that used to have this issue with older Ubuntu's but don't with 12.04. Additional info: The Win7 PC I'm trying to use to control the Ubuntu PC is connected via 2 DLink 8-port gigabit routers. The Ubuntu laptop I usually control via VNC is typically only connected to the network via wireless. The screen refresh is choppy but usable. I've repeated the issue on a Win7 laptop which was connected via ethernet and wireless.

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• "static" as a semantic clue about statelessness?

  - by leoger

  this might be a little philosophical but I hope someone can help me find a good way to think about this. I've recently undertaken a refactoring of a medium sized project in Java to go back and add unit tests. When I realized what a pain it was to mock singletons and statics, I finally "got" what I've been reading about them all this time. (I'm one of those people that needs to learn from experience. Oh well.) So, now that I'm using Spring to create the objects and wire them around, I'm getting rid of static keywords left and right. (If I could potentially want to mock it, it's not really static in the same sense that Math.abs() is, right?) The thing is, I had gotten into the habit of using static to denote that a method didn't rely on any object state. For example: //Before import com.thirdparty.ThirdPartyLibrary.Thingy; public class ThirdPartyLibraryWrapper { public static Thingy newThingy(InputType input) { new Thingy.Builder().withInput(input).alwaysFrobnicate().build(); } } //called as... ThirdPartyLibraryWrapper.newThingy(input); //After public class ThirdPartyFactory { public Thingy newThingy(InputType input) { new Thingy.Builder().withInput(input).alwaysFrobnicate().build(); } } //called as... thirdPartyFactoryInstance.newThingy(input); So, here's where it gets touchy-feely. I liked the old way because the capital letter told me that, just like Math.sin(x), ThirdPartyLibraryWrapper.newThingy(x) did the same thing the same way every time. There's no object state to change how the object does what I'm asking it to do. Here are some possible answers I'm considering. Nobody else feels this way so there's something wrong with me. Maybe I just haven't really internalized the OO way of doing things! Maybe I'm writing in Java but thinking in FORTRAN or somesuch. (Which would be impressive since I've never written FORTRAN.) Maybe I'm using staticness as a sort of proxy for immutability for the purposes of reasoning about code. That being said, what clues should I have in my code for someone coming along to maintain it to know what's stateful and what's not? Perhaps this should just come for free if I choose good object metaphors? e.g. thingyWrapper doesn't sound like it has state indepdent of the wrapped Thingy which may itself be mutable. Similarly, a thingyFactory sounds like it should be immutable but could have different strategies that are chosen among at creation. I hope I've been clear and thanks in advance for your advice!

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• How to get Hyper-V to recognize that a VM isn't stopping, it's stopped.

  - by Matt Burke

  I have a Hyper-V virtual machine that has some problems. First, its settings are apparently corrupt: The WMI object contained an invalid value in property BIOSNumLock. The WMI object contained an invalid value in property AutomaticStartupAction. Second, I saw something that implied that I could toggle the NumLock checkbox on the BIOS property page to fix the first problem, but the checkbox didn't show up. So I connected to the VM and shut it down. Now (many hours later) Hyper-V claims that the VM is "Stopping". However, when I follow the interweb's directions on forcing a VM offline (i.e. find vmwp and kill it), I can't find vmwp. The VM's WMI object has a PID that doesn't exist, and none of the vmwp processes have this machine's GUID. So, how do I trick Hyper-V into seeing that the machine is offline (or letting me delete it)?

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