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• VM: Windows 7 host, Linux guest, VT-d?

  - by chx

  I am sick of the driver issues of Linux. So I am planning to switch to Windows 7 as a host and virtualize my Linux into it. My laptop has integrated Intel graphics and supports VT-d. For speed reasons I would like to assign that card to Linux. Now, Parallels could do it but this page says Note: If you have only one PCIe video adapter, its name will be grayed out in the PCI Devices list and you will not be able to allocate it to your virtual machines. I would be perfectly fine with a headless Windows 7 (I can remotely admin from other computers or just the Linux guest) -- is there any VM software that doesn't have this restriction?

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• Overheating on Ubuntu 12.04

  - by mati

  I have a Dell Inspiron Q17R with two graphic cards and I noticed that it is overheating. I installed Bumblebee, Jupiter and Flashblock, and I followed this guide as well, but it still got up to 74C. Is there anything more I can do? It still doesn't really seem to be working well and the fan keeps spinning really fast. After performing the following test: sensors in the terminal, this is what I got: Adapter: Virtual device temp1: +75.0°C (crit = +100.0°C) temp2: +75.0°C (crit = +100.0°C) coretemp-isa-0000 Adapter: ISA adapter Physical id 0: +68.0°C (high = +86.0°C, crit = +100.0°C) Core 0: +68.0°C (high = +86.0°C, crit = +100.0°C) Core 1: +65.0°C (high = +86.0°C, crit = +100.0°C) it doesn't look good.

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• How is it possible for SSD's drives to have such a good latency?

  - by tigrou

  First time i read some information about SSD's, i was surprised to learn they internally use NAND flash chips. This kind of memory is generally slow (low bandwidth) and have high latency while SSD's are just the opposite. But here is how it works : SSD drives increase their bandwidth by using several NAND flash chips in parallel. In other words, they do some data striping (aka RAID0) across several chips (done by the controller). What i don't understand is how SSD's drives have such a low latency, whereas they are using NAND chips? (or at least lot better than what a typical single NAND chip would do) EDIT: I think under-estimate NAND chip capabilities. USB drives, while powered by NAND's are mostly limited by USB protocol (which have a pretty high latency) and the USB controller. That explain their poor performance in some cases.

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• df-h command in ubuntu

  - by Esha Sharma

  I am a new user of Ubuntu. When I type df -h in terminal , it gives me list of all storage devices and space usage. In my system I get this. Filesystem Size Used Avail Use% Mounted on /cow 934M 173M 761M 19% / udev 925M 4.0K 925M 1% /dev tmpfs 374M 856K 373M 1% /run /dev/sdb1 7.5G 2.8G 4.8G 37% /cdrom /dev/loop0 1.5G 1.5G 0 100% /rofs tmpfs 934M 16K 934M 1% /tmp none 5.0M 0 5.0M 0% /run/lock none 934M 76K 934M 1% /run/shm /dev/sda 299G 74M 299G 1% /media/q I understand that /dev/sda is my hard drive which is 320 gb(in gib it is 299 and hopefully that is what is being displayed) and /dev/sdb1 is pendrive of 8gb from which I am running the live cd. My question is what are the other folders and what is the physical location of these folders if complete memory is taken by the device dev/sda?

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• What would cause a query being ran from SSMS on local box to run slower then from remote box

  - by Racter

  When I run a simply query such as "Select Column1, Column2 from Table A" from within SSMS running on my production SQL Server the results seems to take extremely long (45Min). If I run the same query from my dev system’s SSMS connecting to the production SQL Server the results return within a few seconds (<60sec). One thing I have notices is if the system was just rebooted performance is good for a bit. It is hard to determine a time as I have had it start running slow very quickly after reboot but at most it performed good for 20min and then start acting up. Also, just restarting the SQL service does not resolve the issue or provide a temporary performance boost. Specs for Server are: Windows Server 2003, Enterprise Edition, SP2 4 X Intel Xeon 3.6GHz - 6GB System Memory Active/Active Cluster SQL Server 2005 SP2 (9.0.3239)

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• How do I now access my site for an installation

  - by user4524

  I have just rented a virtual private server with DirectAdmin. I have an ip address, lets say its: 178.239.60.18 Now I have made a new domain on the server. It resides in a folder called: example. Now when I would like to acces this in a browser, I type in 178.239.60.18/example or 178.239.60.18:example But this does not work. What am I doing wrong? When I look at the DNS record it does say the the ip address for example is 178.239.60.18

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• Set up Ubuntu in Virtualbox to have static ip

  - by Don H

  I frequently work in different locations, and need to have a virtualbox version of Ubuntu server running locally. While I was at home getting it set up, I was able to ssh into the server using the locally allocated IP address. However, now that I'm elsewhere, ifconfig is still showing the old 10.0.x.x ip address, but instead of being in the 10.0.x.x space, my laptop's ip starts with 192.168.x.x With that in mind, if there a straightforward way to set up the virtual box Ubuntu server in such a way that I can just connect using "ssh servername" regardless of it's ip address?

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• Are Rackspace's Cloud Servers really cloud hosting?

  - by sopppas

  I may be confused about what cloud hosting really is... I asked Rackspace how its Cloud Server (CS) 256MB/10GB compares to Slicehost's 256slice VPS, and they said it's exactly the same (only different billing and BW). I know they are the same company. So, why do they call it Cloud Server? Isn't it just a collection of VPS (virtual private servers)? For me, cloud hosting would be: if I need any additional horsepower at any given time, the cloud would automatically stack more VPS and then charge me at the end of the month for the surplus of resources. Reading Rackspace's info, it looks like it's for me to decide when to stack more CS and that its Cloud Servers don't AUTOMATICLY scale up. Am I confusing things?

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• Cannot install VS Team System 2008 on Windows 7 Ultimate (64bit)

  - by systemX

  I am trying to install VS TS 2008 on W7 Ultimate (64bit), but I have run into errors during the setup. Please take note that I have tried to mount the iso to a virtual drive, and also extracted the iso contents to a local folder. Both methods have failed and produce the same error log below. [10/26/09,03:02:40] Runtime Pre-requisites: [2] Error: Installation failed for component Runtime Pre-requisites. MSI returned error code 1603 [10/26/09,03:02:42] VS70pgui: [2] DepCheck indicates Runtime Pre-requisites is not installed. [10/26/09,03:02:42] VS70pgui: [2] DepCheck indicates Microsoft Visual Studio 2008 64bit Prerequisites (x64) was not attempted to be installed. And the list goes on and on.. This is a fresh install of W7, and I have not installed Microsoft Office 2007 at all yet, not sure if it would be causing my errors right now.. I appreciate any help I can get thank you.

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• Getting Started with windows server 2008/2012

  - by hbrock

  First let me say, I am a programmer(not a super star) but I want to get more into the system/network administration side of things. This because there are more jobs for system/network administrators in the area I live. Right now I am using virtual machines to learn how windows 2008/2012 works and to build labs with. But how would I prove to an employer what my skill set is with windows 2008/2012? As a programmer I would point to my past projects, code samples, and so on. Thanks for any help.

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• Flag outgoing message for follow-up in Thunderbird

  - by nw

  More and more I need to follow up on specific messages I have sent, but memory fades. Can anyone recommend a way to flag outgoing messages "for follow-up" in Thunderbird? (Not sure but I think MS Outlook supports this.) I have a little hack, which involves a custom rule to tag incoming messages from myself to myself. Then I simply include myself in the recipient list on messages I want to follow up on. But perhaps there is a more elegant extension or technique out there?

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• SSH disconnects active session after 20 minutes

  - by Paramaeleon

  I’ve just set up a new Linux box (OpenSuSE 12.3 on VmWare). Now I stated that my SSH shell sessions are disconnected exactly after 20 minutes, clearly with activity. (Putty: “Network error: Software caused connection abort”) I already set Putty to send keep alives every 64 sec. In sshd_config, I set ClientAliveInterval 50 ClientAliveCountMax 2 and did a deamon reload. Didn’t help. About two minutes after the link breakdown, ssh reports to /var/log/messages: … … sshd[…]: Timeout, client not responding. … … sshd[…]: pam_unix(sshd:session): session closed for user root I don’t encounter this behaviour when connecting to other virtual machines, so I guess the problem isn’t in the network. Any help is appreciated.

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• Dell PowerEdge 2950 III running XenServer with 2 VMs gets sluggish after a week and needs rebooted?

  - by Joshua Rountree

  It has weird hangs and then random CPU spikes that do a ton at once. While remoted into the VMs I get an update all at once then it hangs for another 20 seconds. When it lets it go through I get a CPU spike. Basic server specs for the HW node is: 8 CPUs, 16GB ram 1TB HDD total iPERC6 raid 10 The VMs are barely used but I have them spec'd at VM 1: 4 CPUs, 4GB Ram VM2: 4 CPUs 6GB ram The HW node currently says it's total CPU usage is 11% AND Used Memory is at 63%out of 16GB I'm new to this stuff so I'm not sure. I just recently installed this and set it all up. Please advise if you can!

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• MySQL cluster: 20Tb x 3K tables

  - by ethrbunny

  Over the next 2-3 years we will be scaling up data collection for a project. As a result the amount of data will grow 10-fold. Our current MySQL installation can keep up with the 2Tb of data but for larger queries there is a fair amount of IOWait. Im investigating a migration to a clustered solution to spread out the IO but am wondering about NDB and what happens to data that doesn't get accessed very often. The impression I get from reading about MySQL cluster is that it relies on memory tables for most of the data. What happens with tables that don't get accessed very often (or at all)? And how does backup work? Can I use MYSQLDUMP or is there a better solution?

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• xl create doesn't bring up console

  - by ineff

  I've tryed to run VM in Xen 4.2 using xl command (for what I get this should be standard toolstack, while xm is deprecated). In this case I've the following configuration file kernel = '/media/home_separata/domU_kernel/boot/vmlinuz-linux' ramdisk = '/media/home_separata/domU_kernel/boot/initramfs-linux.img' name = "domU_Arch_linux" memory = "512" root = '/dev/xvda1 ro' disk = ['file:/media/home_separata/domU_kernel/arch_linux_kernel.img,xvda1,w'] vif = ['mac=aa:::10:11:f1,ip=192.168.0.2,bridge=xenbr0'] when I try to start the virtual machine with xl create it seems it works (it also bring up the vif interfaces) but if I try to connect via xl console it gives an error: xenconsole: Could not read tty from store: No such file or directory the fun fact is that the I've the problem inverse using xend/xm (in that case xend doesn't bring up vif interfaces but activate console). Does anyone have any suggestion?

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• Linux and Windows machines sharing a network

  - by Saif Bechan

  I have different Windows and Linux machines that share an internal private network. From within this network I can SSH to every machine etc. This internal network works great. I have my main windows machine from where I control these machines either trough SSH or virtual desktop. Is there a way for me on my main machine to see all the machines that are connected to the network. I want to be able to see all the machines and maybe browse them, share files etc. I am very new to networking of this kind so any recommendations are welcome. Should I set up this network by workgroup? I do not think Linux supports that. Or should I set up the network with domain, I never did that before.

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• VMware player suspends on screensaver

  - by Chad

  I have this problem with my VMWare player. When my host operating system either goes into screen saver or I lock the work station with Windows Key + L. VMWare player pauses or halts everything. So when i come back to the computer and there is a background task working inside the virtual machine it does not progress until i've actualy loged back on. Is there any way to stop this behaviour with VMWare player and keep it running in the background even when the screen saver or the work station is locked? Version of VMWare is: 3.0.0 build-203739

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• Fastest OS for Java applications

  - by user33408

  Hello I have a multithreaded Java program. I am dealing with certain perfomance problems. I have improved everything. Hardware + Software. Now I think that it's time to move to proper Operating System. I was wondering, what OS is the fastest for Java Virtual machine? I am using Sun Java6. Do you think that Sun Solaris would be the best choice for Java applications? Or FreeBSD? or CentOS (I am using it currently)? Thanks

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• Multiple SQL Standard Instances on 4 Processor/32-core Server

  - by Theowood

  We have a large 4 processor/32-core server with 192GB of memory available in the data center and over twenty small SQL Standard databases to consolidate. They are a mix of SQL 2012 and 2008 R2 for 3rd-party apps. Is there any issue with simply installing two instances of SQL Standard on the server - one for 2012 and one for 2008 R2 ? Each instance will use up to 64GB out of the 192GB and 16 cores. If we did this with Enterprise, the licensing would be a fortune and the Enterprise features are not needed.

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• WebsitePanel 2 totally NOT working on Windows Server 2012 on Azure

  - by Carmine Giangregorio

  I’m having many troubles installing WebSitePanel on an Azure Virtual Machine, with Windows Server 2012. I followed the steps in http://www.websitepanel.net/documentation/deployment-guide/server-configuration/preparing-windows-server-2008-r2-for-websitepanel-installation/ and installed everything I needed. Then, I installed the WebSitePanel Standalone Server package with the installer. I opened the endpoint for the port 9002 on Windows Azure; so I pointed my browser to myhostname.cloudapp.net (note: in Azure you don’t have a static IP address, instead you have an hostname like [hostname].cloudapp.net). So, loading myhostname.cloudapp.net:9002 fails, and any browser shows something like “Unable to load page”. Notice: if I try to load the WebSitePanel Portal directly on the server, I get an error HTTP 400 Bad Request. How come? IIS works perfectly on the server, in fact the default website runs without problems on port 80.

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• RemoteApps and Cached Credentials

  - by user66774

  I'm looking for a guidance on an issue we're having. We are hosting an application over terminal services through RDWeb on Windows 2008 Server. To give users the ability to change their password we've exposed the iisadmpwd to allow the users to change their passwords. When the users change their password, they are prompted to log into broker server, even if they log off of the RDWeb page and log back in. What we've found is that the credentials seem to be cached in memory after logging in. Ending task on TSWBPRXY.EXE, WKSPRT.EXE, closing IE and logging back into the RDWEb page, then launching the application allows the user to log into the application without additional credentials. I'm wondering if there is a better way to either have the user change their password from a web interface, but allow them to reestablish their connection from the RDWeb login page rather than through the RDP login prompt that comes up.

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• Does nginx auth_basic work over HTTPS?

  - by monde_

  I've been trying to setup a password protected directory in a SSL website as follows: /etc/nginx/sites-available/default server { listen 443: ssl on; ssl_certificate /usr/certs/server.crt; ssl_certificate_key /usr/certs/server.key; server_name server1.example.com; root /var/www/example.com/htdocs/; index index.html; location /secure/ { auth_basic "Restricted"; auth_basic_user_file /var/www/example.com/.htpasswd; } } The problem is when I try to access the URL https://server1.example.com/secure/, I get a "404: Not Found" error page. My error.log shows the following error: 011/11/26 03:09:06 [error] 10913#0: *1 no user/password was provided for basic authentication, client: 192.168.0.24, server: server1.example.com, request: "GET /secure/ HTTP/1.1", host: "server1.example.com" However, I was able to setup password protected directories for a normal HTTP virtual host without any problems. Is it a problem with the config or something else?

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• Completely formatting a USB flash drive

  - by efcjoe

  I have a Verbatim Store 'n' Go drive which by default comes with software in a partition which password protects the drive. I want to erase this partition, as it only works on Windows (I'm having to look at it now through a virtual machine on my Mac). I've tried using KillDisk to totally wipe the whole thing, but it doesn't seem to work, and this password-protecting partition always remains intact. Is there any program which will completely wipe a flash drive, no questions asked? Or is there a way to do it through the Verbatim software? I have the password and everything, I just can't find a way to fully format it. Cheers.

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• Nameserver Problem

  - by Ruel

  I installed Virtualmin GPL with BIND, etc. I created a virtual host for my main domain, and edited the zone file, added the A records for the nameservers ns1.mydomain.com and ns2.mydomain.com. All looks good from the VPS, whenever I do a dig or nslookup, all seems fine, returning correct details. But when I test externally, there are no results. I tried several sites such as intodns, etc. It says my nameservers doesn't point to any IP. I have registered my nameservers with the appropriate IP in my registrar, and I even contacted support to verify this, and they told me that the registration was successful, but when they dig my nameservers, there's no ip address. I can also connect to my server IP's port 53. Also, I know that the DNS propagation is 24-48 hours. But there has to be some server that can return the correct results by now. Please lead me to the right direction, thanks.

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• Sharepoint 2010 reacts very badly to having it's IP address changed. How do I fix it?

  - by Jeff Sacksteder

  I have Sharepoint 2010 set up on a virtual host for prototyping various projects. If I restart the host, the IP changes. Afterwards, SP complains that it can't find it's configuration database. I can't find where it might be storing an IP. To clarify, the URL remains the same - I have a dynamic dns solution in place to handle that. I can't see anything in the web.config files or the database connection strings that would indicate a hardcoded IP. How can I fix this up in less time than re-installing every time I need to do a project?

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