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• Best use of new express card on Windows

  - by jckdnk111

  I just bought a 48GB SSD express card for my laptop and I am trying to decide how best to use it. I will be running some sort of virtualization (prob VirtualBox) to test / learn Windows Server administration. I am running Windows 7 Ultimate 64 bit. I have 4GB of RAM and a 7200 RPM SATA hard disk. The express card will read at 115MB/s and write at 65MB/s. So how best to use this new disk? Readyboost, relocate pagefile, store VM disks, mix / match?

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• What is the best way to setup a heartbeat agent for failover between two VMs?

  - by EGr

  I have two VMs in VirtualBox that use NAT for their network adapters. They are both getting the same IP address, so I will need to reconfigure that; but knowing that, is it possible to set up a heartbeat agent to failover an apache server if one of the two VMs go down? The way I pictured it would be that the webserver would be able to be accessed externally via :80. No matter what VM was running, I would be able to access the website at that IP/port since failover would be setup. I'm running into trouble setting up IPs when the network adapters are set to NAT, and people have told me that I shouldn't be setting the IPs in this configuration. So what should I do to achieve what I'm looking for? Is it even feasible?

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• Can the JVM(Oracle) run into an OutOfMemory error if the heap size is below the max?

  - by user439407

  I am running a Tomcat site(with an NGinx front end) that seems to be randomly running out of memory even though the max heap size is pretty large. My question is is it possible for the JVM to get an OutOfMemory error even if the heap size is significantly less than -Xmx? For instance, here is a snapshot I took just 15 seconds before an OutOfMemory error: Tue Dec 18 23:13:28 JST 2012 Free memory: 162.31 MB Total memory: 727.75 MB Max memory: 3808.00 MB I guess theoretically it's possible that my code generated 3 gigs worth of objects in 15 seconds, but I highly doubt it. It seems like the JVM was unable to grow the heap even though it theoretically had room....Is it possible that other processes started using memory to the point that the JVM could not grow? I am running 64-bit Oracle Hotspot on a 64 bit vm running CentOS 5 with 6 gigs of ram.

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• send mail via smtp on debian 6?

  - by acidzombie24

  i followed this tutorial http://library.linode.com/email/exim/send-only-mta-debian-6-squeeze?format=print When i got to the end, i sent the email to [email protected]. I didnt receive it. I didnt get spam either, i got nothing. I also didnt get an error message on the console. How do i properly sent up a smtp server and send an email from it? I'll not i am testing this on my VM on my local computer. My ISP doesnt block any traffic whatsoever (which is one reason why i use them) so... what can i do? i also tried this tutorial

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• If an old Exchange server is not part of a domain, does that imply that it can be safely removed without affecting mailflow?

  - by Bigbio2002

  We are doing some cleanup, and there is an old Exchange VM hanging around that we want to get rid of. We do not have the local admin credentials, but we can ascertain that it is not part of the current domain. Seeing as the new production Exchange server is working fine, is it safe to power off and remove the old server? *I should probably note that this is not an Edge Transport server. There was an upgrade to Exchange 2013 at some point in the past, and there is only one functioning Exchange server now.

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• Xen VGA passthrough: is it possible to have dual GPU's with single monitor

  - by user489481

  I hate dual-booting between Windows when I want to play a game and Linux when I need to work. I don't fancy running Linux in a VM and Wine almost never works for me. So, I'm thinking about buying a new mainboard and CPU that is compatible with Xen's VGA passthrough and HVM virtualization. I want to be able to switch between the Linux Dom0 and Windows DomU with ease, but the problem is I need two GPU's and have only one monitor. Right now I have a nVidia GTX 260 in my PC, but I also have a Radeon 4850 sitting in my closet that I was going to sell. My question is, can I salvage the Radeon card to run the Dom0 and have the nVidia card run the DomU while having some kind of device/software to connect them a single monitor? Power supply and airflow issues aside. If not, what would you suggest? Is this even possible?

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• How to Extending a logical volume in WMWare

  - by Mercer

  down vote favorite i have a CentOS 6.3 into my Virtual Machine. I have 2 Disk: Disk#1 = 18G Disk#2 = 20G [root@vm ~]# df -h Filesystem Filesystem Size Used Avail Use% Mounted on /dev/mapper/vg_system-lv_root 1008M 250M 708M 27% / tmpfs 1.9G 0 1.9G 0% /dev/shm /dev/sda1 194M 31M 154M 17% /boot /dev/mapper/vg_system-lv_home 504M 17M 462M 4% /home /dev/mapper/vg_system-lv_opt 2.0G 68M 1.9G 4% /opt /dev/mapper/vg_produits-lv_grid 6.9G 2.5G 4.1G 38% /opt/grid /dev/mapper/vg_produits-lv_oracle 6.9G 144M 6.4G 3% /opt/oracle /dev/mapper/vg_system-lv_tmp 2.8G 71M 2.6G 3% /tmp /dev/mapper/vg_system-lv_usr 2.5G 1.6G 799M 67% /usr /dev/mapper/vg_system-lv_var 2.0G 278M 1.6G 15% /var So i want to extend my /tmp and my /opt/oracle like this: 10Go in/tmp 13Go in /opt/oracle Thx.

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• Restoring Dell recovery disks while preserving Linux partition

  - by Flup

  I have a Dell laptop dual-booting to Windows 7 and Linux. I have through my own stupidity royally stuffed the Windows partition. I have the set of recovery DVDs that I created when I first got the laptop, and I've successfully booted from them in a VirtualBox VM and ended up with a fresh (albeit virtualised) installation of Windows 7. When I started the recovery process, there was mention of other partitions being preserved, but it was unclear as to whether non-NTFS partitions would survive the process. The question is: can I run the recovery procedure without risking my Linux partition?

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• "SIOCSIFADDR: No such device" after restoring backup

  - by Paul Tomblin

  I bought some new hardware, and tried to restore my backup on it. When I boot, I don't get a network connection. If I type "ifup eth0" on the command line, I see the messages: SIOCSIFADDR: No such device eth0: No such device lspci shows an ethernet controller (Intel 82546GB). ifconfig does not show any controller except loopback. I tried installing bare Debian on the machine and the network worked then, but now I want to make it like my old machine was. Googling this problem only seems to find people having this problem in VMs. I'm not in a VM.

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• Uploading many large files to a remote server

  - by TiernanO

  I am in the process of creating an offsite backup, and need to do a initial load of data. Currently, that's about 400Gb, give or take 10Gb or so... The backup system is producing files which are about 4Gb each, and has some other, smaller related files also. So, i need to transfer all 400ish gigs to a remote server, but how? What is the best method? I have full remote access to the server, so i can install anything i need to install. There are Windows, Linux and a Solaris VM running on the box itself, so any of those can be used there, and i have Windows and Linux at home. I have 2 internet connections in house, 10Mb/s uploading on each, so something that could potentially split the number of connections would be handy (kind of like GetRight, but in reverse... PutRight?).

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• Error connecting ESX 5.0.0 to domain

  - by Saariko

  I am trying to connect an ESX 5.0.0 to our Domain Controler, in order to give a Domain group specific roles security. But I do not see any groups after the host connects to the domain. Under Configuration - Authentication Services - I connected the host to the domain: I created the role I wanted, with the selected approved features But when I want to add a permission to a set of VM's, I can not see "my domain" on the drop down, only the: "localhost" How do I see "my domain" on the Domain drop down - so I can select the domain group to give the role to? To note: I followed the instructions to connect to the domain form VMware site.

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• Cannot access Samba Share that is on Linux

  - by doug

  I have 3 virtual machines; Windows Server 2012, Windows 8, and CentOS Linux. The Server is configured with active domain. The CentOS VM has a Samba Share which has rights for the domain Administrator. Now, the Windows Server 2012 DC can successfully locate the share, but cannot access it (with Admin) ? Is it not possible for the Server to have access to it has Domain Client Admin, not Server Admin ? Hope this is clear? Thanks

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• How do you reset the range of available ports that libvirt autoport can use?

  - by bcmcfc

  Libvirt is using its autoport setting to automatically allocate ports within a range starting at 5900. Example excerpt from an XML configuration for a VM: <graphics type='spice' port='6000' autoport='yes' listen='127.0.0.1' keymap='en-gb'> <listen type='address' address='127.0.0.1'/> </graphics> Currently, there are free ports at various points within the range 5900 to 5999. However, newly booted VMs are picking up ports from 6000 on. I need for it to reuse the available ports in the 59xx range. Is this possible? If so, how do I do this? The problem arose because VMs are being accessed via websockets, and it tried to use 6000 which is a reserved port for X11. A solution that explains how to blacklist ports from being picked up by autport would also be sufficient.

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• Setting up a transparent proxy with only one box.

  - by Scott Chamberlain

  I am playing around with transparent proxies, unfortunately I do not have two machines to test it out with. The current way I am doing things is the program makes a request to a computer on port 80, I use iptables -t nat -A OUTPUT -p tcp --destination-port 80 -j REDIRECT --to-port 1234 to redirect to my proxy that I am playing with. the proxy will send out a request to port 81 (as all outbound port 80 are being fed back in to the proxy so I want to do something like iptables -t nat -A OUTPUT -p tcp --destination-port 81 -j DNAT --to-destination xxxx:80 The problem lies with the xxxx part. How do I change the destination port without changing changing the destination ip? Or am I doing this setup completely wrong, I am learning after all and constructive criticism is definitely appreciated. The machine I am using is pretty low end so I would like not not have to create a VM with a second box unless absolutely necessary.

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• Using VMware's ESXi, can I plug in 30 USB Wireless adapters and allow each of 30 VMs one?

  - by 31eee384

  I'm assuming ESXi will act very similarly to VMware Workstation or other products, so answers based on knowledge of those programs might also help. I want to plug in 30 USB Wireless or Ethernet adapters into my server, and let each VM access one and only one of these devices. Unfortunately, I don't have the hardware to just try it out as the purchase of hubs and adapters hinges on the result of this question. The answer could be a resounding "yes, easy!" and that would be great. I couldn't find any answers to this question with google, and it's possible that this is because it's so easy to do.

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• In place SQL 2008 upgrade vs. Side by side?

  - by Jim

  I have a SQL 2005 Std edition server with 5 databases in production, 4 db's are used by web-based apps the 5th is a desktop application. My question is should I perform an in-place upgrade or a side-by-side by creating an sql2008 instance on the same box? The machine is a VM on vmware and I'm planning on taking a snapshot before the upgrade and having a 'blackout' window during the upgrade so that I could roll back to the snapshot if things go really bad. Any previous experience and advice is appreciated.

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• How to trigger chef-client on all nodes from my workstation

  - by divyanshm

  I have 5 nodes and all of them have one setup cook-book in common. Now I would like to add another task in this common cookbook that would configure SQL server for me on all the nodes. Is there a way/command to manually trigger this change across all clients right away? I use azure VM's. All the nodes are Windows Server 2012 machines. I could do a knife winrm machine-name chef-client -m -x username -P password on all the machines, but i'm sure there should be a better way of doing this. I'm new to using chef, so I might be missing a very basic command here.

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• debian installation without internet connection

  - by Gobliins

  Hi i want to install some Debian distributions (Grip, Crush, Lenny...) for arm / armel architectures. www.emdebian.org/ i refer to this guide www.aurel32.net/info/debian_arm_qemu.php The Problem i have is that i dont have internet connection with My Linux VM or Qemu i am behind a Proxy. I want to know is there a way where i can dl all the needed files and save them to disk that i don´t need an i.c. during the installation? I am working under Windows now. my regards

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• Change MacOS X guest screen resolution for VirtualBox

  - by Pymoo

  I have tried all alternatives and resources that I found on internet to achieve to change screen resolution in my MacOS X guest. I have the latest VirtualBox version (4.1.22) and I have MacOS X 10.6.3 Snow Leopard running in a vm guest. Some solutions that don't work for me are: Tuning virtual machine settings: Adding and in the .vbox file, or running these two commands: vboxmanage setextradata "MAC OS X" "CustomVideoMode1" "1360x768x32" vboxmanage setextradata "MAC OS X" "GUI/CustomVideoMode1" "1360x768x32" Editing Guest OS boot configuration: Modify /Library/Preferences/SystemConfiguration/com.apple.boot.plist with these lines: <key>Kernel Flags</key> <string>"Graphics Mode"="1360x768x32"</string> <key>Graphics Mode</key> <string>1360x768x32</string> Any other suggestion, something that I was missing. Thanks in advance,

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• Type 1 Hypervisor on the desktop

  - by Blazemore

  I have a powerful home PC, and I've used VirtualBox to run Linux distros in Windows (and vice versa). I'm interested in trying out a lightweight type 1 hypervisor to run all my operating systems (Windows 7, Debian, Arch) and was looking for suggestions of which to pick and how to implement this. From what I gather, a type 1 hypervisor is a lightweight OS which simply provides VM management functionality. Will I get reasonable performance under each guest OS? Can all the guest OSs have access to a shared data drive, or is is best to have a storage server in another guest OS and mount it over the virtual network? What about gaming, is this feasible, or will I realistically need to run Win7 on bare metal? I'd appreciate any input.

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• CPU/RAM usage log over a period of time to file on CentOS

  - by joel_gil

  Hi everyone Im looking for an app pr line of code that could let me observe a process, save the info in a number of variable and then put the gathered info on a file. Ive been trying with variations of top but no luck. I am running several CentOS virtual servers, VM is 2gb ram 2 processor. Maybe a script that works over a specified amount of time while writing lines with the info on a text file so at the end i can have a sort of table with the data. The thing is Im going to stress test the server and I would like to have the data to make some statistics. Any comments and suggestions are most welcome.

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• VMware Workstation 7 build 203739 - Capture Movie Mouse Pointer Not Visible

  - by BMIVM

  Hi, I have noticed that whenever I create a Capture Movie, the movie is fine but the mouse pointer is not visible at all. The clicks are on buttons file menus are executed but is hard for a viewer of the capturre movie session to follow the recording smoothly. This was not a problem in previous versions of WorkStation. Is this a bug or is there a setting I can set to see the mouse pointer? Note: VM Tools are installed, Host is Vista Ultimate Edtion SP1, x64 and the guest is a Win XP SP2. Thanks in advance for your help.

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• Autosaving on emacs or xemacs files (preferably on loss of focus)

  - by Spencer

  Ideally I want to replicate with emacs functionality from TextMate, whereby on loss of focus i.e. I click away from the buffer, my file saves. If this isn't possible, I want to customize emacs so that it will autosave the file for every character I write. When I say this I don't mean I want to autosave to the ~ backup files. I want to save the file I am currently working on. I am working on a Fedora VM. Note I am not looking for a backup or autosave. I want the file I am actually in to save, so that if I loaded the html file I am editing in a web browser it would reflect my new changes without me having to explicitly change it.

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• What is shrink_slab, and why is it showing up in /var/log/messages?

  - by Steve Kehlet

  I'm investigating some application issues on a Linux system and noticed this around the time of the most recent problem, but not close enough to be definitively related: Jun 7 17:51:49 localhost kernel: shrink_slab: nr=-155456000 Jun 7 17:51:49 localhost kernel: shrink_slab: nr=-157859400 Jun 7 17:51:49 localhost kernel: shrink_slab: nr=-157833400 Jun 8 06:20:23 localhost kernel: shrink_slab: nr=-284172800 What is this? Googling isn't helping, I get that it's something with VM, but why is it suddenly showing up in /var/log/messages? Edit: I take it it's showing this because the number of pages it could free ("nr") is negative. Which is presumably a bad thing. I found patches for newer kernels that display a more useful message to this effect. Still not sure what this means though, or what I need to do about it.

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• Error installing Java on Ubuntu Server

  - by Camran

  I get this error almost when installation is finished: /proc is not mounted; some java apps may fail Could not create the Java virtual machine. Error occurred during initialization of VM Could not reserve enough space for object heap Ignoring error generating classes.jsa Why is this? I just entered sudo apt-get install sun-java6-jre sun-java6-plugin sun-java6-fonts Is there something I must do first? What is Proc? If you need more input let me know. Thanks

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