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• Likeliness of obtaining same IP address after restarting a router

  - by ?affael

  My actual objective is to simulate logged IPs of web-site users who are all assumed to use dynamically assigned IPs. There will be two kinds of users: good users who only change IP when the ISP assignes a new one bad users who will restart their router to obtain a new IP So what I would like to understand is what assignment mechanics are usually at work here deciding from what pool of IPs one is chosen and whether the probability is uniformly distributed. I know there is no definite and global answer as this process can be adjusted be the ISP but maybe there is something like a technological frame and common process that allows some plausible assumptions. UPDATE: A bad user will restart the router as often as possible if necessary. So here the central question is how many IP changes on average are necessary to end up with a previously used IP.

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• Installing CentOS on remote machine.

  - by vijay.shad

  Hi, Can I do a fresh install of centos linux distribution on a remote machine? I have got a machine with windows NT system in a remote location. Now i want to use that system as my deployment machine. To proceed on my plan i need to install a linux os(have chosen CentOS). The guy with machine there is not very much aware of the installation process of any OS. So i thought of the remotely install. Please give me some insight how can i achieve this?

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• Saving each layer of a Photoshop image to separate files

  - by BadKnees

  I have a PSD file with all icons in separate layers as vectors. I would like to save them in different sizes to use in iPhone, iPhone4 and iPad. I tried Files Scripts Export Layers to Files That took about 15 minutes to save each layer while the computer was overheating from the work. Tried with two different computers, one with CS4 and the other with CS5. Same result. And that doesn't allow me to set sizes. Seem like most icon packs, like pictos, glyphish and iconsweets are distributed in this way, in one PSD file. Is some easy way to get them out of the PSD and into PNG files?

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• webmail suite recommendation

  - by hoball

  Hello, I have serveral emails in a few domains (email@domain1, email@domain2, email@domain3). Currently they are on an owned email server and I am collecting emails via IMAP protocol (i would not like to use POP..) in Thunderbird. I have a few partners and I want to allow them to access the same email address. Here is what I desired: All users can open All the inboxes via IMAP @ Thunderbird (with proper configuration) at the same time, there are a webmail system, every user can login their account (userA, userB, userC), and they will see all inboxes (email@domain1, email@domain2, email@domain3) Would you recommend any suite that fits my needs? Either (a system to be installed on my server) or (a remote service where I need to config MX records) will do. Thank you.

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• Linux-Vserver: How to do upgrade Debian 5.0 to 6.0 on vservers and main machine?

  - by Bartosz Kowalczyk

  I have server with debian lenny. I installed vserver on this server a few years ago. Summary I have 5 guest of vservers and main system, now. Each guest is debian lenny. Now, I'm wanting upgrade from lenny to squeezy on this servers (each Vservers and main machine). Do you do it? I should upgrade as usually system ? First I should upgrade every vserver next main machines and I have to do reset all machines and vservers? Please, advise me how to do it ?

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• Shared storage solution for our sql server backups

  - by Gokhan

  We have 3 clustered sql servers. We have 5+ multi terrabyte databases and their backup files (compressed using quest litespeed) are hitting over 600gb each, We are required to keep at least a week or two weeks (if we can) of weekly full backups and then 6 days differential backups, and a week or 2 weeks worth of log backups local. We are currently limited to 2TB volumes from our san team, we can have multiple volumes but they are expensive ($200 per raw TB per month) and having to deal with many backup volumes instead of a single big volume is difficult. I think if we could have a shared network storage of 20TB+ raid 10 or so for all our servers for keeping the backups and another department will copy them to tape from the network storage and delete files according to the retention period would be good, if this box would be a build in operating system (even unix a complete file storage system) that would be good. What do you guys think, does this make sense to you, is there any manufacturer that sells a storage product like that which that work in a clustered environment? Thank you

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• Configuring BitLocker on existing Windows Server 2008

  - by neildeadman

  On our file server, we want to enable BitLocker so that we can encrypt a single drive and I know that we have to also encrypt the drive the system is installed on. In my tests with VMs, I have to create a partition on the same disk as Windows is installed either before I install Windows or after (I can use the BitLocker Drive Preparation Tool). This tool shrinks the C: drive to make way for a 1.5GB partition. I'm a little concerned about doing this with a live system so wanted to see if it was possible to get BitLocker to use a partition on another drive?

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• Mac OS X Server 10.6.6 "disables" CPU in VMware Fusion

  - by wjlafrance

  Hello! I installed Mac OS X Server 10.6.0 in VMWare Fusion the other night and it worked perfectly, until I ran Software Update. I upgraded to 10.6.6 through the combo updater, and now when I start the VM it says: "The CPU has been disabled by the guest operating system. You will need to power off or reset the virtual machine at this point." I've switched the operating system in the options to OS X Server 32bit, 64bit, and even to Windows 7, and nothing has worked. Does anyone have any ideas?

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• Fedora12 Slow USB 2.0 Write Speed, ehci_hcd module is missing.

  - by MA1

  I am using Fedora 12, the problem i am facing is USB 2.0 write speed. I have a dual boot system with Window XP and Fedora 12. USB 2.0 write speed in Windows XP is much faster then what i am getting in Fedora 12. After some googling i came to know that ehci_hcd module is missing/not present in my system. ehci_hcd module is neither loaded nor it is present in the available list of modules. Can someone guide me how to fix this issue? Is ehci_hcd have something to do with USB 2.0 write speed or? Should i have to recompile the kernel and add/enable he ehci_hcd module?

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• Prevent Windows 7 from unpluging External HDD

  - by marverix

  I have installed Windows 7 as my media server. I pluged in 500GB external HDD via USB. I have changed power plan to Best Performance and changed advenced power settings to never turn off HDD etc. I even yesterday wrote powershell script (create and delete folder on this disk) and I have added it to harmonogram to run every 5 minutes starting from system boot. And nothing! Disk after some time (I realy can't say when) is turning off and Windows show "Unknown Device" in Device Manager. Then only system reboot or disk reboot helps. Any ideas how to prevent Windows 7 from stopping my external HDD? Cheers!

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• suggestions for migrating a windows 7 install to a new 4K sector disk

  - by myCubeIsMyCell

  Hi, I'm looking to upgrade the disk on a windows 7 box to a new larger drive. In the past for such migrations I'd just hook both drives up and use a linux boot disk and use dd to copy from one disk to the next... boot up the new drive & expand the partition. The drive I just purchased however is a western digital using 4k sectors... not sure if there'd be any complications using my old method moving from a 512b sector drive. Current plan is to try the migration by doing a win7 system image backup to an external drive... then restore the image to the new drive via system restore boot disk. Any suggestions or recommendations on how to best complete this migration would be greatly appreciated. Thanks!

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• How can I copy the output from a remote command into the local clipboard?

  - by cwd

  I use iTerm2 as my terminal client in Mac OS X. On the local system I can use pbcopy and pbpaste to transfer data between the system clipboard and the terminal, but of course this doesn't work when you're ssh'ed to another machine. Is there some way which I can take the result of a command and copy it to the clipboard automatically? Perhaps an applescript to grab the text on the iTerm windows, then get the next to last line? For instance, if I wanted to copy the current working directory: I run pwd, then use the mouse to select the text, and then press command + c. Is there any better / faster / automatic way of doing this? I'm not looking for a bulletproof solution that would work for every command (eg: might not work when there is a huge scrollback) - I'm just looking for something to make this task that I do quite often a little less tedious. Update I'm looking into using screen to do this, but I'm still not sure if it is possible.

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• Few questions about SLI

  - by toomanyairmiles

  Hi all, thanks in advance for your help. I've just added a second card to my system so I can add a third monitor. I'd got as far as determining both cards need to use the same driver (after a blind alley with another cheap ATi card) so I'm now the proud owner of a second BFG 9800 GTX+ card. One is a BFG OCX and the other an BFG OC (small difference in clock speeds but they are in all other respects the same) but wanted to know the following:- 1) Is it worth adding the SLI connector, will it really boost overall performance (I'm guessing that the OCX card will then perform as the OC card does)? 2) Are SLI connectors (the one's that run across the top of the cards) motherboard or manufacturer specific? 3) If I do SLI the cards will I still be able to use all four monitor connectors or just the two on the master card? I'm not a gamer, I'm an IA and web designer so the system is mostly for Photoshop and Illustrator work and the occasional knock around in command and conquer.

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• SQL Server NETWORK SERVICE account permissions

  - by RemotecUk

  My SQL Server Windows service is set to use the NETWORK SERVICE account. The server is installed to C:\Program Files\Microsoft SQL Server\MSSQL10_50.MSSQLSERVER\MSSQL. However looking at the permissions on that folder, NETWORK SERVICE does not have any permissions. The groups which are allowed access to that folder are... CREATOR OWNER - who is this? SYSTEM - sounds fine - so that Windows can access the folder I presume? SQLServerMSSQLUser$Computer_Name$MSSQLSERVER - this is the interesting one - what is this? Administrators Users If NETWORK SERVICE is a user with minimal permissions on the system and looks to the O/S as someone connecting from a network how does it have permissions to access any files in the SQL Server install folder? Thanks.

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• Client-based program to track response time for online webservice

  - by Søren Haagerup

  I am helping a customer with general IT support, and they have a problem with a hosted web-based system being slow. The provider of the system blames the client's computer, and the client calls me for help. I blame the provider, but it is hard to get them to do something about it without rock-solid evidence. And every time the provider comes around for a TeamViewer session, everything of course runs smoothly. Does there exist a client program or browser plugin that tracks statistics about response time for specific web services?

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• Default Critique branch office setup: VPNTunnel->HQ, subnets for VOIP/PC, + several Q's

  - by CHickenTaragon

  We're setting up a new branch office. * ~10 users. * Each user has a VOIP phone provided by a hosted solution. * Users need access to resources on HQ (located in another state), so setting up VPN tunnel * HQ only supports certain Cisco/Juniper devices. VOIP provider only supports SonicWall, so current plan is to have two routers w/ separate subnets for VOIP vs. PC traffic. * PC's will plug into pass-thru Ethernet jacks on the VOIP phones, but the phones vs. PC's will point to different subnets. * Cable Modem is 50Mbps / 5Mbps DOCSIS 3.0 business line w/ 5 static IP's. * Each of the 2 subnets will map to one of the 5 public IP's. * May or may not also need to support a VPN tunnel with a second branch office because of a file server they have there that some in the new office use. I'm pushing to have them move the files to a server on the HQ's network so we don't have to worry about setting up an additional tunnel. Questions: Do you foresee any issues with the below set-up? Router recommendations by HQ IT staff: Cisco Router 2811, or Juniper SSG5 or SSG20. Any recommendations about these routers? We need Wi-Fi too – looks like the above routers have models that support this, any reason not to use this? Users need to be able to work from home. If so, how is authentication handled? Right now we use AD credentials for the HQ's domain, but we currently don't plan to have an AD system in the new location since it's only 10 users. We can't tie the authentication system from the new location's router to the AD system of the HQ. All the PC's that will be in the new location are currently in the existing office that is closing down, and are already joined to the domain of the HQ. Please confirm: this + the VPN tunnel will be sufficient for them to connect to authenticated resources on the HQ's network from the new location, correct? Mainly SQL servers and file servers, and a few remote desktop sessions. I'm sure I'll have some more questions, but can't think of them right now.

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• UUID in Mountain Lion

  - by Naji

  I am trying to find my external HDD UUID in Mountain Lion but diskutil info /dev/disk1s1 returns: Najis-MacBook-Air:~ ****$ diskutil info disk1s1 Device Identifier: disk1s1 Device Node: /dev/disk1s1 Part of Whole: disk1 Device / Media Name: Untitled 1 Volume Name: My Book Escaped with Unicode: My%FF%FE%20%00Book Mounted: Yes Mount Point: /Volumes/My Book Escaped with Unicode: /Volumes/My%FF%FE%20%00Book File System Personality: NTFS Type (Bundle): ntfs Name (User Visible): Windows NT File System (NTFS) Partition Type: Windows_NTFS OS Can Be Installed: No Media Type: Generic Protocol: USB SMART Status: Not Supported Total Size: 2.0 TB (2000364240896 Bytes) (exactly 3906961408 512-Byte-Blocks) Volume Free Space: 212.5 GB (212506509312 Bytes) (exactly 415051776 512-Byte-Blocks) Device Block Size: 512 Bytes Read-Only Media: No Read-Only Volume: Yes Ejectable: Yes Whole: No Internal: No And there is no UUID. What is wrong exactly? Thank you.

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• Missing HDD space - says 65GB used, selecting all folders shows 40GB used

  - by Igor K

  Hi Running Windows Server 2008, 74GB raptor drive and noticed we only had about 500MB left - yikes! So deleted some old backups we don't need, but can't track down where about 25GB seems to be taken up. If I go to C: and select all folders and go to properties, this comes to around 40GB but in My Computer I can see 65GB is used. How can I find out whats eating the space? Just IIS + MSSQL Express + Smartermail on the server EDIT Checked to show hidden folders plus protected operating system files - 41.8GB usage, so 24.6GB is missing somewhere. Theres no system restore even installed on the server

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• MacBook Pro Trackpad freeze / holds click on its own

  - by lajuette

  My MacBook Pro's Trackpad shows an annoying behavior in the last few days. I think the only relevant thing that changed is the firmware for the Trackpad. An update has been distributed via Software Update a few days ago. Sometimes when i click somewhere the Trackpad won't recognize the mouseup, i.e. hold the click on its own. Clicking again seems to stop the holding and issue a new mousedown, but then again, no mouseup I.e. when i click on a file on the desktop the file will be dragged. But i can't stop dragging! Clicking in a browser or text document will select the text/images. Did anyone notice similar behavior? Any ideas or fixes?

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• How can I change ACLs recursively using cacls.exe?

  - by maaartinus

  I want to restrict the access for everything inside the work directory to me and the system only. I tried this with the following command: cacls.exe work /t /p 'PIXLA09\Maaartin:f' 'NT AUTHORITY\SYSTEM':f However it doesn't work at all. The following command should show only the two specified users but instead shows a very long list of permissions: cacls.exe work/somedirectory I tried to use /g instead of /p, too. Since I didn't use /e the permissions shouldn't get edited but replaced. Any ideas what's wrong?

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• Why does diskpart set the volume attributes on all volumes?

  - by Nick

  I was trying to migrate a Win7 OS from a HDD to a SSD. I've created 2 partition with 1024KB offset, with diskpart: 100MB System Reserved and a 60GB for C:. I've cloned their contents using Easeus Disk Copy. I've loaded the Windows 7 Boot DVD, and wanted to use diskpart to drop the letter for the System Reserved partition and make it hidden. select volume 0 detail volume attribute volume set nodefaultdriveletter attribute volume set hidden These 2 attribute set commands actioned on both volumes (0 and 1, MSR and C:) instead of the selected one, and viceversa. I've tried to clear these attributes from volume 1, but it cleared them also from volume 0. Why does DiskPart have this behaviour?

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• Transferring DHCP using Windows Server Migration Tool - Why is Powershell is crashing on the import of the .mig file?

  - by Mike

  I am migrating DHCP from a windows server 2003R2 DC to a Windows Server 2008R2 DC I've followed this video and its predecessor (Installing Windows Server Migration Tools) http://technet.microsoft.com/en-us/video/migrating-dhcp-using-the-windows-server-2008-r2-migration-tools.aspx I went through everything smoothly until the last step. I have exported a .mig file with my DHCP configuration on the old 2003r2 server. I transferred this .mig file over to my 2008R2 server, when running the import command, it will appear to work for a minute or two and then I get a generic windows "Powershell has stopped working" error and I have to close the program. Under the problem details I see the following: FileVersionOfSystemManagementAutomation: 6.1.7600.16385 InnermostExceptionType: System.AccessViolationException OutermostExceptionType: System.AccessViolationException DeepestPowerShellFrame: unknown OS Version: 6.1.7600.2.0.0.272.7 LocaleID: 1033 Seems like there are permissions issues maybe? I am running powershell as an admin and am logged in to the server as a domain administrator. Any Ideas? Thanks

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• What the best way to recover from when your RAID H/W incorrectly thinks a disk is missing

  - by Software Monkey

  I have a Windows 7 system with an MSI motherboard (running the latest AMD BIOS) and two of my four disks (not the system boot disk) configured via the Mobo as RAID-1. After a normal system restart today, the RAID BIOS reports that one of the two drives has been disconnected or has failed. It's not really failed; via recovery tools I can verify that if I take the BIOS out of RAID mode. But I can find no way to re-add the second hard disk to the array and rebuild via the BIOS - the only option seems be to delete the array and recreate it, but I've done that once before and it blows away the disk. It's done this once before, however on a subsequent reboot after double-checking the drive cabling (but not changing anything) and it boot up fine. So I think the mobo RAID is a little bit flaky. At this point I would like to remove the RAID drivers, change to AHCI mode and switch over to using a Windows 7 dynamic mirror disk. But the RAID drivers seem somehow deeply bound into the Windows startup - I can't find anything like the good ol' safe-mode in Windows 7. If I boot from the Win 7 install disk in ACHI mode I can use recovery tools to log in to the Windows 7 installation, so the boot drive it seems fine with ACHI mode. Additionally, I can see all my other disks, run chkdsk on them and they seem to be fine. If I try to boot from the HDD in AHCI mode, it just reboots part way through, presumably because the RAID drivers load and conflict with the BIOS being set to AHCI. So: How do I strip the RAID drivers from my Win 7 installation? If I delete the RAID logical disk, will it really delete partitioning information, or is that just a poorly worded message when it says the data on the disk will be deleted? If I disconnect the 2 disks in a RAID array, then delete the logical disk array, and then reconnect and reboot still in RAID mode, will the disks simply revert to RAID single-disks like my other 2 and then maybe I can leave windows with RAID drivers by operate the disks as singles with 2 of them in a Windows dynamic disk mirrored setup? Does Windows 7 have anything like the Windows XP Repair Install, where it will reinstall the O/S binaries from CD, but leave apps and setup alone. I am really hoping I don't have to do a complete reinstall of Windows 7 - the last one, when I upgraded from XP, took me two days to get everything set up and installed.

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• How do Windows 7 encrypted files look like?

  - by Sean Farrell

  Ok this is kind of an odd question: How do Windows 7 (Home Premium) encrypted files look like "from the outside"? Now here is the story. An acquaintance of a freind of mine got a nasty virus / scareware. So I wiped out my PC technician cap and went to work on it. What I did was remove the drive from the laptop and put drive into my external drive bay. I scanned the drive and yes it was loaded with stuff. That basically cured the infection and I could start the system back up. To check if it cured the problem I wanted to see the system while running. There where two user accounts, on with a password and one without (both admin users !?!). So I logged into the unprotected user and cleaned up the residual issues, like proxy server to localhost in the browser config. Now I wanted to do the same for the password protected user. What I noticed that from my system and the unprotected user account the files of the protected user looked garbled. The files are something like 12 random alphanum chars, but the folders looked ok. Naive as was thought this might be how encrypted files looked "from the outside". (I never use Microsoft's own security features, so how would I know. TrueCrypt is one big blob.) Since the second user could not be reached, I though sod it and removed the password from the account. (That might have been a mistake, I know.) Now I did the same clean up tasks and all nice and fine; except for the files which where still "encrypted". So I looked into many Windows Encrypted Files recovery posts and not all hope is lost, since I should be able to extract the certificate and with the password regain access to the files. Also note that windows did "only" prompt me that removing the password would be insecure, not that access to encrypted files would be lost, like it is claimed in most recovery articles. Resetting the password did not help and I gave up for the night. The question that nagged me half of the last night was, what if the files are not encrypted, but the scare-ware encrypted / destroyed the files? I don't want to spend hours of work trying to recover files that are not recoverable. The ting is that the user does not remember turning it on and aren't the files marked in blue and the filename is readable? Many thanks for input from users who have more knowledge about WEF...

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• Is a reboot required to refresh permissions after adding a user to a new group?

  - by Michael Prescott

  On ubuntu server, I've noticed more than once now that after adding a user to a group that user doesn't have group permissions until I reboot the system. For example: User 'hudson' needs permission to read directory 'root:shadow /etc/shadow' So I add hudson to the shadow group. hudson still cannot read. So, I 'sudo shutdown -h -r now' and when the system comes up again user hudson can read. Is a reboot required or is there a better way to get permissions applied after adding the user to the group?

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