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• Can't install Ubuntu 12 into VirtualBox (USB not recognized, ISO would not boot)

  - by wvxvw

  I'm trying out VirtualBox 4.18 and wanted to install Ubuntu 12 as a test. After installing VirtualBox (on Debian squeeze/sid), creating a virtual machine for Ubuntu and pointing it in Settings Storage IDE Controllers to the ISO with the proper version of Ubuntu, checked the "Live CD" option. Tried to define the IDE as master / slave, primary / secondary - all to no effect, and trying to boot this system, I'm getting to the screen which says: FATAL: could not read from the boot medium! System halted I've copied the same ISO to the USB stick, and I can boot from the USB (outside VirtualBox). I've looked at couple of tutorials / walk-through, there's nothing I can see that I would've done wrong. So, how would I configure it to boot from the desired ISO? Below is the snapshot with the current settings (sorry, I don't know how to get them as text).

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• Restrict access to SSH for one specific user

  - by j0nes

  I am looking for a way to secure my servers with the following setup: I have a server where I can log in via SSH. The main account there (named "foo") is secured by a keybased login with password. I have another user account (named "bar") that I use to log in via cronjobs running on other servers - this one also has keybased login, but without password. Now I want to limit access to this machine for the "bar" account. The account should only be accessible via known IPs. However, the "foo" account should not be affected by this, this one should basically be accessible from any IP. How can I manage this? Or is there a simpler solution to everything?

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• WebLogic 12c training in Dutch–May 10th & 11th 2012 Utrecht Netherlands

  - by JuergenKress

  Axis into ICT offers you the opportunity to increase your skills. We are organizing ‘Bring Your Own Laptop Knowledge Sessions‘. In a small group of up to 8 people we are going discuss all the practical aspects of WebLogic Server you ever wanted to know. This is not a standard course, but a training where applying the material in practice is of importance. All participants will receive their own virtual machine, which offers you to ability to continue afterwards with your own practice environment. By keeping the groups small we create an informal atmosphere with plenty of room for all your questions or to even discuss your specific situation. The approach is highly interactive; after all you are attending to increase your knowledge. Topics that will be covered Introduction JVM Tuning Deployment Diagnostic Framework Class Loading Security Configure Resources Clustering Scripting Register for this session You are interested in the ‘Bring Your Own Laptop Knowledge Sessions: WebLogic 12c’? Register for one of two possibilities by using the form below. After registration you will receive a confirmation by e-mail. Training will be in Dutch! Date: May 10 & 11 2012 from 09:30 – 17:00 hrs Location: Axis into ICT Headquarters (Utrecht) Expenses: € 700,- per person (VAT excluded) For registration and details please visit our website. Want to promote your event? Let us know Twitter @wlscommunity! WebLogic Partner Community For regular information become a member in the WebLogic Partner Community please visit: http://www.oracle.com/partners/goto/wls-emea ( OPN account required). If you need support with your account please contact the Oracle Partner Business Center. Blog Twitter LinkedIn Mix Forum Wiki Technorati Tags: Axis,education,WebLogic training,WebLogic,WebLogic Community,OPN,Oracle,Jürgen Kress,WebLogic 12c

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• Flash drive doesn't mount on mac

  - by Doug Harris

  I've got two different USB flash drives which are formatted MS-DOS(FAT-16). When I plug each into my MacBook Pro (running MacOS 10.6 - Snow Leopard), they don't mount. I can see them using Disk Utility. When I run an Ubuntu VM inside of VMWare Fusion, Ubuntu has no trouble mounting these either. I've tested with the drives plugged directly into the machine and plugged into a usb hub -- both give the same results. Is there a setting I've inadvertently set which disables automounting? Is there an issue with mounting FAT-16 drives?

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• When copying VM filesystem over netcat, dd copies double the disk size

  - by JivanAmara

  I'm attempting to copy the disk of a working headless virtualbox VM (VM1) on one server to a new VM (VM2) on a vCloud server. I don't have access to the host of VM2. The OS is Windows Server 2003 (32-bit) I start both VMs with a live Knoppix image. I run 'nc -l | dd of=/dev/sda bs=512' on VM2 I run 'dd if=/dev/sda bs=512 | nc ' on VM1 I previously did this with another windows VM and it worked fine. VM1 has a disk of size ~70GB (verified with fdisk); however, the amount of data dd reports read/written is ~139GB. Of course the target machine doesn't work properly. I get a Windows splash screen, then blue error screen with general 'system not working' information. I'm at a loss what could cause this. Any ideas?

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• Windows 7: Server disappearing from Network window

  - by David Veeneman

  I am running a small (three computer) network on a Windows Server 2003 domain. All of the computers were just upgraded to Windows 7. Since the upgrade, the icon for the domain server periodically disappears from the Network window on all three computers. It doesn't happen at the same time on all computers--the icon typically disappears from one machine, but not the others. And it's not always the same computer. The network connection is still there--I can type \\myserver and get to the network shares. It's simply the icon that's disappearing. Has this happened to anyone else? Any suggestions for a fix? Thanks in advance.

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• Could a computer act (dependably) as a wireless router for 200+ clients? [closed]

  - by awkwardusername

  That is, I have a Core 2 Duo E7500 at 2.93GHz, with 2GB memory. I plan to install either Windows Server 2012 or Zeroshell 2.0RC1, and it also (planning to) includes two PCIe Wireless Card Adapters. It also has one ethernet port, and I will connect that to another machine which will be a Database and a Web Server. My plan is to have a corporate level wireless intranet with 200+ clients. I cannot afford to buy routers because I want to operate at zero costs as possible, utilizing my available resources. Is that plan plausible? Also, what minimum specs should my wireless card have? @SvenW: Oh, I meant corporate on the deployment level. I am still an undergraduate and this is more of an educational and expiremental work than an actual project. I got Windows Server 2012 for free though, and this isn't actually for commercial use.

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• How can I get the best performance for playing games?

  - by Oli

  I've been playing a couple of Wine-games today and decided to switch to metacity to see what the performance difference was like. If you've never done it before, you just run metacity --replace but don't do that if you use Unity! Anyway, surprise surprise it was like playing on a dedicated Windows gaming machine. Playing under metacity today was bliss. Much higher framerates and just a fluidity that you'd expect from a native game. I'm not sure I can go back. Switching to metacity is no hardship but I wonder if there's anything else in the WM landscape that I should try out. I'm essentially looking for suggestions for the best way to play games. Mix up WMs, dedicated X sessions, whatever... As long as it makes Wine games run faster. Small print One process per answer (eg: New X session + OpenBox) We should probably land on a benchmark so we can show percentage improvement over a stock Compiz desktop. I'm open to suggestions in the comments. If people could test it and submit their how much it improves things for them in the comments, that would give others a good idea of if it's worth the pain.

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• Symmetrix gatekeepers on Solaris 10

  - by Milner

  I have some Solaris machines that are connected to EMC Symmetrix for SAN storage. Apparently the Symm has a gatekeeper device that is used with the symmetrix CLI. We don't need the CLI, but I have these gatekeeper devices that constantly fill /var/adm/messages and the like with corrupt label errors. Is there anything I can do (short of deleting the devices on machine start) to get rid of them? Or should I just try to get our SAN guy to get the installer for the CLI? These things are getting annoying, and the devfsadmd daemon keeps rediscovering them on boot.

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• Is it safe to use a single switch for multiple subnets?

  - by George Bailey

  For a moment, forget about whether the following is typical or easy to explain, is it safe and sound? Internet | ISP supplied router x.x.x.1 (public subnet) | switch-------------------------------------+ | (public subnet) | (public subnet) BVI router (switch with an access list) NAT router | (public subnet) | (private subnet 192.168.50.1) +--------------------------------switch----+ (both subnets) | | computer with IP 192.168.50.2 ------+ +----computer with IP x.x.x.2 I don't plan to implement this setup, but I am curious about it. The 50.2 computer may send a packet to the x.2 computer, but it will use 50.1 as the router, since 50.2 knows that the subnet is different. Would this result in the packet being received twice by the x.2 machine, first directly through the switch, second by way of the two routers? Do you see any problems with this aside from how confusing it is, and that it would put one switch doing the work of two subnets?

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• Certain drives in RAID 5 set intermittently are not recognized

  - by hydroparadise

  I have a curious problem in that 1 (sometimes 2) drives do not get recognized in a RAID 5 set. The server is getting rather old at 5 to 6 years, but still seems to function well once the machine sees all drives. So that leaves me with three areas to consider: the motherboard, the SATA RAID card, or the individual hard drives themselves. I am leaning toward the RAID card, but have not had much dealings with RAID cards. What would cause individual drives not to be recognized in the set? If it was the card, I would think that it would be all or nothing. If it were a single drive, is it possible that it would only work sometimes? The only other thing to consider is that that they are different drives (Seagate and Western Digital) but all around 80 GB. SATA RAID controller is 3ware Escalade 8506-4LP Motherboard is a SuperMicro P4SPA+ Am open and available for more details if needed...

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• Why would http & https be blocked, even in safe mode with firewall disabled?

  - by Cogwheel

  I have a windows 7 machine (dell studio xps). Everything on it seems to be in working order. The network device says it has internet connectivity, and indeed I can ping websites, transfer files via ftp, connect to vpns and remote desktop, but the web won't work. I've disabled the windows firewall and still no go. There are no other firewalls installed. The computer came with a trial of norton 360 so I also used the norton removal tool (which solved a similar problem on another computer for me previously). Any thoughts?

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• Cannot access folder locally, but can remotely

  - by Cylindric

  I'm having a peculiar problem on one of my servers at the moment, which seems to be related to authentication in some way, but I have no idea how to find the root of the problem. I have a folder on the server D:\Somefolder\Logs. If I am connected to the server via an RDP terminal, so essentially "local", I cannot access that folder - I get an access denied. If I am connecting from my machine to it using the share \server\d$\Somefolder\Logs, I can access it. I'm logging in to both machines as the same user. Permissions on the folder seem quite simple, CREATOR OWNER, SYSTEM and Administrators. I am a Domain Admin, and they are in the local "Administrators" group. It is also affecting things like access to SQL Server, so I don't think it's a simple folder-permissions thing. For example, I cannot connect SQL Management Studio to all the local SQL instances using a domain account, but I can if I connect remotely to it.

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• How do I revert back to official Linksys firmware from dd-wrt on WRT56G2 v1?

  - by Chris Moore

  I've been having trouble with dd-wrt on my Linksys WRT56G2 v1 router and want to go back to the stock Linksys firmware for it. The router has only 2MB of flash memory, and so I'm running the 'micro' version of dd-wrt. My question is what is the best way to do that? I could use the http://router/Upgrade.asp dd-wrt "firmware upgrade" web interface to do it, in which case there's a dropdown menu choice for "After flashing, reset to": "don't reset" or "reset to default settings". Which should I pick? Some people say that I should use a program called tftp.exe instead. I can probably gain access to a Windows machine if this is necessary. Which of these is the way to proceed? I don't want to brick the router if at all possible! Note: I used the 'wrt54g' tag because I wasn't allowed to create a 'wrt54g2' tag due my low rep here.

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• KB980408: Fix for Explorer freezing: does anyone know what app caused it?

  - by Ian Boyd

  Microsoft released an update for Windows 7 today (Tuesday, April 27, 2010): KB980408: The April 2010 stability and reliability update for Windows 7 and Windows Server 2008 R2 is available. The update fixes, among other things: Windows Explorer may stop responding for 30 seconds when a file or a directory is created or renamed after certain applications are installed. i'm not experiencing it on my own Windows 7 machine, but two colleagues at work were experiencing the problem. i would really like to know what applications were causing problems. Microsoft will never call out the misbehaving applications. i want to know what software i should be ridiculing and insulting. And avoid in the future. Did anyone who was experiencing this problem isolate the applications?

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• nginx proxy pass redirect through load balancer

  - by Brian

  I have several backend webservers that are load-balanced using LVS. These machines have only internal non-routable IPs on them. The load-balancer is the only machine with an external IP. This setup works great. I would like to add another webserver for image serving, but it will not be part of the load-balanced pool. Is it possible to proxy pass from the load-balanced web servers to the image server and have the response redirected to the client? Client--external LB--internal web server--internal image server I've gotten proxy pass working when I remove the LB from the equation, but no luck when trying to use it.

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• In Windows XP, is it possible to disable user credential caching for particular users

  - by kdt

  I understand that when windows caches user credentials, these can sometimes be used by malicious parties to access other machines once a machine containing cached credentials is compromised, a method known as "pass the hash"[1]. For this reason I would like to get control over what's cached to reduce the risk of cached credentials being used maliciously. It is possible to prevent all caching by zeroing HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\CachedLogonsCount, but this is too indiscriminate: laptops users need to be able to login when away from the network. What I would like to do is prevent the caching of credentials of certain users, such as administrators -- is there any way to do that in Windows XP? http://www.lbl.gov/cyber/systems/pass-the-hash.html

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• How to execute a script while booting Linux from flashdrive?

  - by Usman Ajmal

  I know i can make my script run at boot time in runlevel 2 by putting it in /etc/init.d/ and creating a symbolic to it in /etc/rc2.d but thats when Linux is on hard drive. I want to run my script from a flashdrive such that when a user plug in a flashdrive and powers ON the machine, it may start booting from the OS in flash drive and eventually executing my script. How can I achieve such a functionality? I have tried burning OS to flashdrive but I never succeeded in booting OS from flashdrive.

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• Cannot install wine on Ubuntu natty 64bit [broken dependency]

  - by MHK

  I've just installed Ubuntu natty 64bit. Now I'm trying to install wine and no matter how I do it (Software center/synaptic/terminal), it fails. Here's what I tried on terminal: sudo apt-get update sudo apt-get install wine It shows: Reading package lists... Done Building dependency tree Reading state information... Done Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation: The following packages have unmet dependencies: wine : Depends: wine1.3 but it is not going to be installed Depends: ia32-libs (>= 1.6) but it is not going to be installed Depends: lib32asound2 (> 1.0.14) but it is not going to be installed Depends: libc6-i386 (>= 2.6-1) but it is not going to be installed Depends: lib32nss-mdns (>= 0.10-3) but it is not going to be installed E: Broken packages Any body faced this? Is this a bug or something is broken on my end? Any hints on how to solve? Edit: I've tried with aptitude, it gives more clear message: sudo aptitude install wine Output: The following NEW packages will be installed: gnome-exe-thumbnailer{a} ia32-libs{a} icoutils{a} imagemagick{a} lib32asound2{ab} lib32bz2-1.0{a} lib32gcc1{ab} lib32ncurses5{a} lib32nss-mdns{a} lib32stdc++6{ab} lib32v4l-0{ab} lib32z1{a} libc6-i386{ab} libcdt4{a} libgraph4{a} libgvc5{a} libilmbase6{a} liblqr-1-0{a} libmagickcore3{a} libmagickcore3-extra{a} libmagickwand3{a} libnetpbm10{a} libopenexr6{a} libpathplan4{a} netpbm{a} ttf-droid{a} ttf-symbol-replacement-wine1.3{a} ttf-umefont{a} winbind{a} wine wine1.3{a} wine1.3-gecko{a} winetricks{a} 0 packages upgraded, 33 newly installed, 0 to remove and 0 not upgraded. Need to get 135 MB of archives. After unpacking 421 MB will be used. The following packages have unmet dependencies: libc6-i386: Depends: libc6 (= 2.12.1-0ubuntu16) but 2.13-0ubuntu13 is installed. lib32gcc1: Depends: gcc-4.5-base (= 4.5.2-2ubuntu3) but 4.5.2-8ubuntu4 is installed. lib32asound2: Depends: libasound2 (= 1.0.23-2.1ubuntu2) but 1.0.24.1-0ubuntu5 is installed. lib32stdc++6: Depends: gcc-4.5-base (= 4.5.2-2ubuntu3) but 4.5.2-8ubuntu4 is installed. lib32v4l-0: Depends: libv4l-0 (= 0.8.1-2) but 0.8.3-1 is installed. The following actions will resolve these dependencies: Keep the following packages at their current version: 1) ia32-libs [Not Installed] 2) lib32asound2 [Not Installed] 3) lib32bz2-1.0 [Not Installed] 4) lib32gcc1 [Not Installed] 5) lib32ncurses5 [Not Installed] 6) lib32nss-mdns [Not Installed] 7) lib32stdc++6 [Not Installed] 8) lib32v4l-0 [Not Installed] 9) lib32z1 [Not Installed] 10) libc6-i386 [Not Installed] 11) wine [Not Installed] 12) wine1.3 [Not Installed] Leave the following dependencies unresolved: 13) wine1.3-gecko recommends wine1.3 14) winetricks recommends wine1.2 | wine1.3 | cxoffice5 | cxgames5 It seems the wine package hasn't been updated in the repo. What should I do now?

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• sp_releaseapplock timeout expired cause?

  - by Darian Miller

  I've been using a combination of sp_getapplock and sp_releaseapplock for some custom application locking purposes for years now with success and just the last few days I've started to get some timeout expired errors on a sp_releaseapplock which is a bit puzzling. When listing the current locks, there's less than a dozen of these active, and the rest of the dedicated server is way underutilized at the moment (less than 100 batches/sec with a mutli-processor, 32GB Ram, higher end machine.) Is there a specific resource to be monitored that may point me in the right direction for determing why such a lightweight operation is timing out? This is called within a stored proc with a timeout of 120 seconds which seems to be amazingly long for this operation to timeout on. SQL 2000 SP4 running on Windows 2003 Server. TSQL used (@pLockUniqueName is VarChar(255)) EXEC @pLockSuccess = sp_getapplock @pLockUniqueName, 'Exclusive', 'Session', 0 EXEC @pUnLockSuccess = sp_releaseapplock @pLockUniqueName, 'Session' Thanks, Darian

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• DHCPPloc.exe or equivalent for Windows 7?

  - by Bart B

  There seems to be some DHCP funnyness going on so I need to run something to show me what's going at a DHCP level. Before I upgraded my machine to Windows 7 I used DHCPloc.exe from the Windows XP support tools, and it worked like a charm. I can't seem to find Support Tools for Windows 7, and trying to use the XP tools in compatibility mode doesn't work (I tried, it fails to open a receiving socket). I need a tool to monitor DHCP traffic, and ideally one that lets me filter it to exclude DHCP traffic from our trusted DHCP servers and only show me un-authorised DHCP traffic.

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• Mounting root failed. Dropping into basic maintenance shell

  - by vmsystem

  Hi, I have purchased AMD Phenom X4 955 3.2GHZ processor with supporting gigabyte GA-MA785GM-US2H mother board / 6GB DDR2 RAM / 500GB SATA drive for learning Vmware ESX 3.5 product. In the above configuration, I have installed windows xp 64 bit operating systems and continue to installed vmware workstation 6.5. From the VM workstation, I can able to install ESX3.5 update2, but I unable to start properly, please refer the below mention error. “Mounting root failed. Dropping into basic maintenance shell. To collect logs for VMware, connect a USB storage device and run 'bin/vm-support '. Machine will be rebooted when you exit from this shell.” The same was tested in the windows 2003 Enterprise Edition server / windows 7 32bit / windows 7 64bit also, Please help me to resolve the issue.

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• Weird windows quirk when renaming file

  - by Roy Rico

  Hi, I am finding when I try to rename a file in windows 7, i typically select the file i want to rename, hit F2 (rename) and type the new name. I've been getting this weird bug which the while file name gets selected again, sometimes right in the middle of me typing. I can sit there and watch it reselect the entire filename every second or so as if someone is invisibly hitting control+a while type. I have tried making sure that my keys aren't being pressed, and also have even gotten a new keyboard and this problem still consists. I know it'll probably be a long shot, but just hoping someone's seen this issue and has a resolution. UPDATE: This is on a desktop machine, not a laptop, so there's no issue with Trackpad.

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• Possible to use DRBD on two ESXi virtualized servers?

  - by chen

  I have two servers (attached disks have been set up as hardware RAID1 for disk device level failure resilience). Here is the setup in my mind: 1) Install ESXi on each of the physical server, M1, M2; 2) Start one VM on each of the ESXi virtualized physical server V1, V2; 3) Install the DRDB drivers within V1 and V2. Essentially, this is a "virtualizing machine running DRBD in the VM's instead of bare metal hardware" idea. My question is whether the above setup can achieve the same "networked RAID1" goal that DRDB can achieve in the bare-metal physical machines (http://www.drbd.org/). Thanks. [EDIT] I found this (http://serverfault.com/questions/49305/drbd-experimentation-and-virtualization) is a similar question, but the answer does not seem to be firmative enough for me to follow.

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• Serverlocation moved and how can I Move the files

  - by Bernhard

  Hello together, I´ve a big problem. I have to move data from an old Webspace which is only accessibla by ftp. No we have a new root server which is accessible by ssh of course :-) No i Need to move all data from the old space but there is a lot of Gb of files. Is there a way to fetch all files directly from the old ftp to the storage and not over a third station (my local machine)? I´ve tried it with ftp but without success. I think I´ve used the wrong commands. Is there a way to etablish something like this including all files and directorys? Thank you in advance Bernhard

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