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• Testing a Virtualisation of a Debian Server (vmWare vSphere probably)

  - by xyza

  I'm soon getting access to a powerful root-server (quad-core, 16gb ram, 1gbit connection) where gameservers (like minecraft,counterstrike etc.) for different customers should be setup. My plan is to use programs such as vmWare vSphere to create some virtual machines for each customer. Inside such a virtual machine I'll setup the gameserver and maybe some kind of ftp server when its needed. Now that I'm kinda new to virtualisation of servers I want to test this local on my Desktop Computer. Is it possible to create a virtual machine of debian using vmWare Player on my Windows desktop computer and then install vmware vSphere in this VM to create multiple VM's inside that VM ? Or do I really need to install Debian on my desktop computer. (I want to use the time during installations etc. to work a bit at my windows installation) Some tips on virtualising debian servers are also appreciated :)

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• Managing service passwords with Puppet

  - by Jeff Ferland

  I'm setting up my Bacula configuration in Puppet. One thing I want to do is ensure that each password field is different. My current thought is to hash the hostname with a secret value that would ensure each file daemon has a unique password and that password can be written to both the director configuration and the file server. I definitely don't want to use one universal password as that would permit anybody who might compromise one machine to get access to any machine through Bacula. Is there another way to do this other than using a hash function to generate the passwords? Clarification: This is NOT about user accounts for services. This is about the authentication tokens (to use another term) in the client / server files. Example snippet: Director { # define myself Name = <%= hostname $>-dir QueryFile = "/etc/bacula/scripts/query.sql" WorkingDirectory = "/var/lib/bacula" PidDirectory = "/var/run/bacula" Maximum Concurrent Jobs = 3 Password = "<%= somePasswordFunction =>" # Console password Messages = Daemon }

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• Anything to share a printer from 32-bit to 64-bit Windows?

  - by marklam

  I've got a printer which only has 32-bit drivers, so it's installed on a 32-bit machine (XP). I need it to appear as a printer (with duplex control etc) on a 64-bit machine (Vista). I can't just share it using Windows printer sharing because the 64-bit client requires drivers to connect to it. There's no 64-bit driver for a similar printer that works (using the new port named \\server\printername). I've tried the ghostscript approach but that doesn't seem to help with the duplex control etc. Printeranywhere doesn't support 64-bit OS yet. Is there another way to do this?

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• How can I optimize ubuntu desktop to run my webserver

  - by Parry

  Hi, I am using ubuntu desktop edition to run My drupal website on Intranet. I know for running web servers best thing to install is ubuntu server editions, but due to some problem i am using Desktop edition. I installed XAMPP on my machine an my website is up and running. I want to know how can i optimize my machine?? Since I will not use very less features of desktop editions are there any things which I can remove or stop which will free memory and cpu consumption, are there any packages which i should install to increase the performance of my ubuntu??

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• Top ten most active programming sites to run an ad campaign [closed]

  - by fabbianni

  Hello friends, I'm looking for a new investment in the programming area, I'd like to know about the state of the art in the programming sites you usually visite, like stackoverflow. Not sure if sites like thecodeproject (and similar) are too old fashioned these days. I'm a programmer, but honestly haven't been too involved in the programming arena mostly for admin issues. I'm looking for sites with both great audience and great content, and open to ads, again, like stackoverflow. thanks !

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• Word 2007 "Out of Memory or Disk Space" Error on launch.

  - by Adam

  Word 2007 is installed on a Vista Home Premium machine and whenever it starts up it opens what appears to be a dynamic installer to do something and then throws up the "Out of Memory or Disk Space" error. Word 2007 never completes starting up. Reinstalling Word hasn't helped and if I can avoid reinstalling Windows until Windows 7 is released and get Word working in the mean time, that would be ideal. I've been looking around for a solution, once of which seemed to point to a problem with the user account. I created a second user on the machine and Word still had the same problem. The other solution that seems possible is a corrupted normal.dot/normal.dotm file. However, even in the location it should be, I can't seem to find it. Am I going in the right direction with this? Is there another solution I haven't come across that will fix this? If it is possible that renaming normal.dot/normal.dotm how can I find it?

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• Is there a way to make scp run faster on a Mac OS X?

  - by paul_sns

  I'm trying to a upload a Flex generated SWF file from my Macbook (running Snow Leopard) using the command scp main.swf server.com:/ I had setup key authentication to prevent typing the user/pass every time. This process normally takes up to two minutes using my connection at home (768kbps down/300+ kbps up). The interesting part is that when I use WinSCP in my Windows XP machine, the process only takes 30 seconds max. Both my MacBook and Windows XP machine use the same internet connection. The MacBook is connected to the router via cable (which should be faster right?) while the Windows XP connects through Wifi. Let me know if you need additional information in order to diagnose the problem. Thanks!

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• Feeding the kernels entropy source from other machines and/or increasing its maximum size

  - by David Spillett

  We have has a little trouble with a small box that acts as a VPN end-point and mail relay for our network, caused by the available entropy for /dev/random being too low (which causes TLS connection attempts by exim to fail). The machine doesn't do anything else, so the normal feed into the entropy pool (interrupt timings from things like disk access) is not enough. As a quick hack I've set a looping script that reads from /dev/hda at a couple of Mbyte/sec which keeps it topped up. Other than buying a hardware RNG, is there a clean way of piping data for entry from elsewhere, such as a copy of the data our file server uses for its entropy source? I've spotted several tips for using rng-tools to feed it from /dev/urandom on the same machine but that "feels dirty". Also, is it possible to increase the maximum pool size? It currently seems to max out at 3585.

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• How to automatically resize the Dash when screen dimensions change?

  - by St.W.

  I use a convertible thinkpad (x201t) and magick-rotation to rotate the screen by 90 degrees in tablet mode. Therefore after rotation the screen's width is only 800 points (the ordinary resolution is 1200x800). The Dash does not adapt to this new state and therefore if I click on it, it is oversized and I cannot reach the applications/files/buttons on its side. Is there a way to tell the Dash that it should only ever use a width of 800 pixels, or any other solution to automatically adapt its size when rotating?

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• Methodologies for performance-testing a WAN link

  - by Chopper3

  We have a pair of new diversely-routed 1Gbps Ethernet links between locations about 200 miles apart. The 'client' is a new reasonably-powerful machine (HP DL380 G6, dual E56xx Xeons, 48GB DDR3, R1 pair of 300GB 10krpm SAS disks, W2K8R2-x64) and the 'server' is a decent enough machine too (HP BL460c G6, dual E55xx Xeons, 72GB, R1 pair of 146GB 10krpm SAS disks, dual-port Emulex 4Gbps FC HBA linked to dual Cisco MDS9509s then onto dedicated HP EVA 8400 with 128 x 450GB 15krpm FC disks, RHEL 5.3-x64). Using SFTP from the client we're only seeing about 40Kbps of throughput using large (2GB) files. We've performed server to 'other local server' tests and see around 500Mbps through the local switches (Cat 6509s), we're going to do the same on the client side but that's a day or so away. What other testing methods would you use to prove to the link providers that the problem is theirs?

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• export block device over network without root

  - by dschatz

  I'm trying to export a file as a block device over the network. I do not have root access on the machine where the file exists. I do have root access on the machine(s) where I will mount the block device. I've seen ATA-Over-Ethernet and ISCSI but there don't seem to be any implementations which allow me to export the block without root at least (some even require kernel modules). Is there an implementation of either of these or some other protocol that doesn't require root? Perhaps I can tunnel ethernet over IP to do this?

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• Java JRE: Setting default heap size

  - by AndiDog

  I'm having trouble with Java on a virtual server, it always gives me the following error: # java Error occurred during initialization of VM Could not reserve enough space for object heap Could not create the Java virtual machine. I first solved this by using the CACAO virtual machine (of OpenJDK, by putting it first in jvm.cfg), but then I run into problems with my web application (Play! framework based, gives me nasty LinkageErrors). So I cannot use that VM. Instead I'd like to just use the normal server VM and set -Xmx128M by default. How can I do that? Related: this question

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• DD-WRT Router Can't hold a connection after initial setup...

  - by AC

  Struggeling with my new DDWRT router (Buffalo WZR-HP-G300NH) configuration. I configured it using one machine while comparing the settings on my existing Linksys WRT54GL on another machine. To the best of my knowledge, I've set it up the same way as my Linksys, but DDWRT has so many other options. After configuring it, I plugged it into the modem, VOIP device & my network. I see the phones come back online. However after a few minutes, it seems I lose the outbound connection (phones die and I can't get out over HTTP). What's confusing me is it works for a few minutes, then it fails. No idea what to look for. Ideas?

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• How do I run a batch file async using PSExec?

  - by Paul Mrozowski

  I have a batch file I run that, among other things, reset's the NICs in the machine. I have some watchdog software running on another machine that monitors the first one. I'd like to run this batch file using PSExec when it detects certain types of failures. The problem I'm having is that since the batch file reset's the NIC's it kills the connection PSExec has (I'm OK with that). The real issue is that when PSExec dies the batch file stops running (leaving the NIC's disabled). I've tried using the -i option with PSExec with no luck. Any ideas about basically just fire off the batch file and NOT have it stop when PSExec is disconnected?

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• connect to paltalk server using a proxy

  - by Navid

  Hi I want to use paltalk, which is a kind of chat software, but the ports that this applications uses are closed in my country. What I need to do is to use a proxy server. Unfortunately the software itself does not provide a proxy setting. I though it would be possible to run paltalk on an O.S. installed on a virtual machine (say virtualbox) and configure the network setting of virtual machine to direct all its traffic through a proxy on host Operating system, but I could not find a way to do so neither. can anyone please help me?

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• SQL Server store procedure encrypt is safe?

  - by George2

  I am using SQL Server 2008 Enterprise on Windows Server 2003 Enterprise. I developed some store procedure for SQL Server and the machine installed with SQL Server may not be fully under my control (may be used by un-trusted 3rd party). I want to protect my store procedure T-SQL source code (i.e. not viewable by some other party) by using encrypt store procedure function provided by SQL Server. I am not sure whether encrypt store procedure is 100% safe and whether the administrator of the machine (installed with SQL Server) still have ways to view store procedure's source codes? thanks in advance, George

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• How to uninstall Ubuntu Software Center in 11.10?

  - by sainath

  I am trying to uninstall software center for ubuntu oneric using the command sudo apt-get remove software center and get this as result Reading package lists... Done Building dependency tree Reading state information... Done E: Unable to locate package software E: Unable to locate package center I did it once and got it fixed but now it does't work. I have an issue with the software center it keeps on repeatedly giving message saying send error.

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• Best network tuning variables for a Linux proxy

  - by smarthall

  What are the best settings to tune so that Linux can handle a very large amount of TCP connections such as would be seen by a proxy server or a webserver? I'm using Centos6 and squid and am seeing a large amount of TIME_WAIT connections backing up until finally the machine stops responding. The machine isn't loaded at the time, and is having trouble making ingoing and outgoing connections. I've had several suggestions of tuning /proc/sys/net/ipv4/tcp_tw_reuse and /proc/sys/net/ipv4/tcp_tw_reuse but they mention bad interactions with load balancers and NAT both of which are used in my situation.

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• Converting an ancient RH8 system to VMware ESXi

  - by donatello

  I am curious to know what options I have to convert a very old RedHat8 machine to a virtual one on ESXi. Looking at VMware Converter it seems there's an option to login to the RH8 using SSH, and from there it will convert to the ESXi-server. That makes me a bit nervous though, exactly what is happening there? The RH8 machine is slightly critical, and if anything messes up it'll likely result in many hours extra work. :( Another option I thought of was to boot a LiveCD on RH8-system and create a raw "dd dump" of the disk. The similar method is used to restore the image, I boot a LiveCD on the VM in ESXi and use "dd" to write it to disk. Is there any other option I could use? I'm using the cheap version of ESXi, hence I have no access to the Converter BootCD so these rather cumbersome methods is the only I can think of. :)

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• Managing multiple people working on a project with GIT

  - by badZoke

  I'm very new to GIT/GitHub (as new as starting yesterday). I would like to know what is the best way to manage multiple people working on the same project with Github. Currently I'm managing one project with four developers. How do I go about the workflow and making sure everything is in sync? (Note: All developers will have one universal account.) Does each developer need to be on a different branch? Will I be able to handle 2 people working on the same file? Please post a detailed answer, I'm not a shy reader. I need to understand this well.

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• 32bit ODBC Postgres driver on Windows 2008 R2 x64

  - by uaise

  I'm trying to install the Postgres ODBC 32bit driver on a Windows 2008 R2 64bit machine. After installing it, with no errors, I go to the ODBC panel, the 32bit version under the /syswow64 folder and try to add the driver, select the Postgres driver from the list but I get an error 126, saying he can't find the driver at the specified path. The problem is that the path he shows me, is the exact path the driver is in, I double checked on the registery (on the HKLM\SOFTWARE\Wow6432Node\ODBC\ODBCINST.INI\ location) and it's fine there too. A couple more people on technet have the same issue too. Did anyone ever run into this? Any ideas would be greatly appreciated. edit: the driver works fine on my win7 x64 test machine, this behaviour only happens on the server.

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• Remote desktop connection drops before login can appear

  - by Keatly

  Hi Everyone, Someone asked this question a few months ago and I have the exact same problem. I have tried all of the suggested solutions in the other posting (in particular reinstalling the video card on the server), but have not had any luck. I have gone through this troubleshooting guide in detail with no results: http://theillustratednetwork.mvps.org/RemoteDesktop/RemoteDesktopSetupandTroubleshooting.html I have a client with Remote Desktop enabled that I can't connect to in our local network. When I enter in the machine ip/port in the connect box and hit Connect, it briefly gives the normal "Connecting..." dialog box. However, after 2 seconds it just drops. No error message, nothing. Just disappears as if nothing was happening. •Windows XP SP3 •Windows firewall is open for 3389TCP •Machine is on a domain •RDP is enabled in My Computer •User is a local admin I have loads of other machines on the same domain with the same GPO that work fine. Any ideas?

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• Removing surrounding noises from voice recording

  - by Peak Reconstruction Wavelength

  I have a wave file whose frequency spectrum looks like this. http://i.stack.imgur.com/2rRaS.png It contains audio, which I want to keep while removing the rest. The problem is that the surround noise changes, just those distinct voice patterns remain. I marked the voice patterns for clarity: http://i.stack.imgur.com/eLkBl.png What could an algorithm look like / a workflow in adobe audition look like that removes everything but the voice patterns? I think that the main characteristic is the line-shaped form over time. Loudness alone is not enough as the noise is loud aswell.

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• Understanding ESXi and Memory Usage

  - by John

  Hi, I am currently testing VMWare ESXi on a test machine. My host machine has 4gigs of ram. I have three guests and each is assigned a memory limit of 1 GB (and only 512 MB reserved). The host summary screen shows a memory capacity of 4082.55 MB and a usage of 2828 MB with two guests running. This seems to make sense, two gigs for each VM plus an overhead for the host. 800MB seems high but that is still reasonable. But on the Resource Allocation Screen I see a memory capacity of 2356 MB and an available capacity of 596 MB. Under the configuration tab, memory link I see a physical total of 4082.5 MB, System of 531.5 MB and VM of 3551.0 MB. I have only allocated my VMs for a gig each, and with two VMs running they are taking up almost two times the amount of ram allocated. Why is this, and why does the Resource Allocation screen short change me so much?

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• USB flash module giving errors

  - by vshenoy

  Hi, I have a SATA USB flash module which was earlier running a 2.4 linux kernel (2.4.36.6) and on which now I am trying to install ubuntu server 10.04.1 LTS. I have two such USB flash modules and on one of them the installation process itself giving these errors: sd 4:0:0:0 [sda] Device not ready sd 4:0:0:0 [sda] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE sd 4:0:0:0 [sda] Sense Key : Not Ready [current] sd 4:0:0:0 [sda] Add. Sense: Medium not present sd 4:0:0:0 [sda] CDB: Write(10): 2a 00 00 05 48 02 00 00 04 00 end_request: I/O error, dev sda, sector 46114 usb 1-1: reset high speed USB device using ehci_hcd and address 2 Buffer I/O error on device sda1, logical block 172033 lost page write due to I/O error on sda1 Buffer I/O error on device sda1, logical block 172034 lost page write due to I/O error on sda1 on the other the installation is successful, but after a day or two of running the machine hangs because of kernel spewing these messages: Remounting filesystem read-only EXT2-fs error (device sda1): read_block_bitmap: Cannot read block [bitmap - block_group = 105, block_bitmap = 860161] EXT2-fs error (device sda1): ext2_get_inode: unable to read inode block - inode=13083, block=24683 ext2_free_inode: bit already cleared for inode 83966 and the machine needs to be hard rebooted. On both the systems SCSI emulation with usb_storage driver is being used to detect the module. Here is the output of /proc/scsi/scsi on 2.4: # cat /proc/scsi/scsi Attached devices: Host: scsi0 Channel: 00 Id: 00 Lun: 00 Vendor: TS Model: UFM Rev: 1100 Type: Direct-Access ANSI SCSI revision: 02 and on 2.6: # cat /proc/scsi/scsi Attached devices: Host: scsi6 Channel: 00 Id: 00 Lun: 00 Vendor: TS Model: UFM Rev: 1100 Type: Direct-Access ANSI SCSI revision: 00 i.e. only 'ANSI SCSI revision:' is shown as different, although I am not sure if this can cause any problem. Really appreciate if someone can point as to how to debug this issue or any mailing list where I can further ask questions about this.

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