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• Use System Restore to rescue lost user profile in Win XP?

  - by im_chc

  Hi! My win XP account profile has recently been "reset". Many app settings are lost. For example, the "recent project" list in VS 2005 is empty. There should be lots of other stuffs that are painfully lost without me knowing! What can I do? Can I retrieve the app settings from System Restore? I don't have much confidence on this util, even tho I think restoring to a point when the profile still works, and back up away the C:\Documents and Settings (is it where all the app setting files are located?), that should work... Is it reliable to restore to a previous restore pt and then goes back to the latest RP? I've googled on System Restore, looks like what the util does is just back up some physical files, and restore them when doing System Restore. That sounds quite safe, but I am still uncomfortable to this. Thx for u guys' help in advance!

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• How to access vm inside a vm via VNC?

  - by can.

  For some reasons I installed virtual machines inside a virtual machine, like this: A( B( C )) where A is the physical machine, B is a vm and the network type is NAT. And C is also a virtual machine and the network type is bridged. The OSes are Ubuntu 12.04 and the hypervisors are kvm. I can access B via VNC and via ssh from A, but for C I can't use ssh because C has no IP address at the start. And I assume I can only access C via VNC. I tried something like(on A): iptables -t nat -A PREROUTING -d $ip-of-A -p tcp --dport 6500 -j DNAT --to-destination $ip-of-B:5900 (I referred to this) But it doesn't work. And I'm reading the man pages of iptables and hope someone could help :)

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• Partition and mount my secondary hard drive on CentOS 5.5 64bit?

  - by Andrew Fashion

  I am trying to prepare my second hard drive for user image uploads. Here is the current layout: # sudo parted /dev/sda print Model: ATA WDC WD2500KS-00M (scsi) Disk /dev/sda: 250GB Sector size (logical/physical): 512B/512B Partition Table: msdos Number Start End Size Type File system Flags 1 32.3kB 107MB 107MB primary ext3 boot 2 107MB 8595MB 8488MB primary linux-swap 3 8595MB 10.7GB 2147MB primary ext3 4 10.7GB 250GB 239GB extended 5 10.7GB 250GB 239GB logical ext3 Information: Don't forget to update /etc/fstab, if necessary. I am assuming #4 is my secondary drive? How do I partition and mount it so I can begin using it? And how do I add to fstab? I understand if it's to many questions in one, just help me with whatever you can I guess :) Thank you for any help!

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• Why are Asynchronous processes not called Synchronous?

  - by Balk

  So I'm a little confused by this terminology. Everyone refers to "Asynchronous" computing as running different processes on seperate threads, which gives the illusion that these processes are running at the same time. This is not the definition of the word asynchronous. a·syn·chro·nous –adjective 1. not occurring at the same time. 2. (of a computer or other electrical machine) having each operation started only after the preceding operation is completed. What am I not understanding here?

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• Creating bootable Fedora USB with persistent storage

  - by dooffas

  I am attempting to burn the full Fedora 19 x86_64 DVD iso to a USB drive and have a separate partition on it for a kickstart file / other media that will be installed in the kickstart process. With the Ubuntu server 12 iso, you can simply dd the iso to the usb drive: dd if=/path/to/iso of=/dev/sdb Once the iso has been burnt, open gparted and create a ext2 parition in the allocated space. However, this does not seem to work with the Fedora ISO. When loading the USB drive in gparted I get a warning and an error: Warning: The driver descriptor says the physical block size is 2048 bytes, but Linux says it is 512 bytes. Error: The partition's data region doesn't occupy the entire partition. Ignoring both of these errors allows gparted to load the usb drive, however it shows a blank drive with no partition table. Has anyone come across this before? From what I have found, it may have something to do with the fact that Fedora use isohybrid.

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• Citrix Xen VM's lose networking

  - by Ash

  My client has a XenServer 6.0.2 installation with 2 Window Server 2008 R2 virtual machines. Whenever the virtual machines are rebooted they lose their IP settings (IP address, subnet, gateway). Each time after a reboot I need to login to each VM via XenCenter and re-apply the required static IP settings. This causes issues with connected iSCSI drives within each VM - drives need to be reconnected after each reboot. For example, a network adapter has the following settings pre-reboot: Description . . . . . . . . . . . : Citrix PV Ethernet Adapter #0 Physical Address. . . . . . . . . : C6-FB-A2-4F-2C-F3 IPv4 Address. . . . . . . . . . . : 10.101.0.101(Preferred) Subnet Mask . . . . . . . . . . . : 255.255.255.0 Default Gateway . . . . . . . . . : 10.101.0.10 DNS Servers . . . . . . . . . . . : 10.101.0.100 NetBIOS over Tcpip. . . . . . . . : Enabled Post-reboot: Description . . . . . . . . . . . : Citrix PV Ethernet Adapter #0 Physical Address. . . . . . . . . : C6-FB-A2-4F-2C-F3 Autoconfiguration IPv4 Address. . : 169.254.153.174(Preferred) Subnet Mask . . . . . . . . . . . : 255.255.0.0 Default Gateway . . . . . . . . . : DNS Servers . . . . . . . . . . . : 10.101.0.100 NetBIOS over Tcpip. . . . . . . . : Enabled Under XenCenter -- Virtual Network Interfaces, each adapter is set to a static MAC address (i.e. "Use this MAC address"). I have tried the following commands within one VM but this had no effect: netsh winsock reset catalog netsh int ip reset Can someone please help?

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• How (much) is virtualization used today?

  - by BLAKE

  I know that where I have worked, I have pushed alot for virtualizing our servers. I think that it is much easier to implement and maintain than physical servers. I have been using Microsoft's Virtual Server 2005 R2 since it was released. Right now at my workplace we have 12 VMHosts that hold about 55 VMs. We have 6 other servers that we have been unable to convert to VMs. I want to know how other people in our field view virtualization. I know that I have had developers dislike the notion of VMs claiming major performance hits. What do other Sys Admins think about virtualized servers?

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• Remotely Managing Storage on Hyper-V 2012 Core

  - by Vazgen

  I have a core Hyper-V Server 2012 that I am remotely managing from a Windows 8 client. I can connect in Hyper-V Manager, Server Manager, and MMC. However, I don't understand how I can manage the physical hard drive (for ex, deleting vhdx files, creating folders, etc) from my Windows 8 client. I tried to attach the remote share as follows: q: \\MyServer\c$ It said command completed successfully, but I don't see the drive on my client's Explorer. I can get to it in cmd.exe on the client but how can I manage it in a GUI? explorer q: Throws error:

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• Mathematica & J/Link: Memory Constraints?

  - by D-Bug

  I am doing a computing-intensive benchmark using Mathematica and its J/Link Java interface. The benchmark grinds to a halt if a memory footprint of about 320 MB is reached, since this seems to be the limit and the garbage collector needs more and more time and will eventually fail. The Mathematica function ReinstallJava takes the argument command line. I tried to do ReinstallJava[CommandLine -> "java -Xmx2000m ..."] but Mathematica seems to ignore the -Xmx option completely. How can I set the -Xmx memory option for my java program? Where does the limit of 320 MB come from? Any help would be greatly appreciated.

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• Cannot login to server after file permissions change

  - by John

  I am using Ubuntu server. I ran: chmod -R 700 / when I was logged in as root. Now when I try to login as my normal user I immediately get kicked out. Is there anyway to log back in to the server whether it is root or whoever so that I can change the permissions? or am I totally screwed? I dont think I have root access enabled in the /etc/ssh/sshd_config file. I do have physical access to the server. I really need some help here.

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• Make user uploads go to different hard drive?

  - by Andrew Fashion

  I am using a pre-made social networking script where all user uploads go to site.com/public/user/ How can I make /public/user/ my secondary hard drive so all user uploads are uploaded to my second harddrive and not the primary hard drive. I have over 100GB of images, and I want them on my other HDD now. Thank you. I am running CentOS 5.5 64bit w/ Apache and PHP I have two 250GB Sata HDDs sudo parted /dev/sda print Model: ATA WDC WD2500KS-00M (scsi) Disk /dev/sda: 250GB Sector size (logical/physical): 512B/512B Partition Table: msdos Number Start End Size Type File system Flags 1 32.3kB 107MB 107MB primary ext3 boot 2 107MB 8595MB 8488MB primary linux-swap 3 8595MB 10.7GB 2147MB primary ext3 4 10.7GB 250GB 239GB extended 5 10.7GB 250GB 239GB logical ext3 Information: Don't forget to update /etc/fstab, if necessary. 5 10.7GB 250GB 239GB logical ext3

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• Splitting an archive on multiple media

  - by Robert Munteanu

  I'm generating archives which are larger than my current physical media ( DVD ). I'd like to split those archives: automatically - instead of generating mini-archives by hand; consistently - so that an archive can be extracted independently of another. For instance for a tree of 24GB which would be archived into 10GB I would get 3 archives, all of them < 4.7 GB and each of them being able to be extracted without the other 2. I'm using dirvish so I'm archiving a filesystem tree. Update: I'm using Linux.

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• Default Program With Multiple Versions Installed

  - by Optimal Solutions

  I have multiple versions of Excel installed. Excel 2010, 2007 and 2003. I have them installed on one hard drive with Windows 7 Ultimate as the OS. When I double-click on an XLS file, Excel 2007 opens. I would like Excel 2010 to open. I read and followed the instructions to go to the Control Panel at "Control Panel\All Control Panel Items\Default Programs" and set the default programs. I changed the default to the physical EXE for Excel 2010 at the proper folder that it is installed. When I double-click on the XLS files, Excel 2007 still opens. So I tried to change it to Excel 2003 just to see if it changed to that and it still opens Excel 2007. What am I missing? I would really like the file extension to open Excel 2010, but can not seem to do that.

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• VPN server on Windows Server 2008 for a small office

  - by cmbrnt

  I'm going to refurbish the IT-infrastructure for a small organization with one single office, and I'm not sure what VPN server to use. In your opinion, would the built-in Windows Server 2008 VPN server suffice or are there any specific problems with it as opposed to, for example, OpenVPN? I'd rather run a Windows native VPN server, but if there are few (preferably free) good alternatives, I could install VMware ESXi and virtualize both Windows and an OpenVPN-server. By the way, because of a low budget this office runs a solution with only one physical server. Any advice would be great to help me grasp this field of which I'm quite a novice. Thank you!

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• After moving our Servers to a virtual environment using VMware - SQL timeouts came in, why?

  - by RayofCommand

  We moved our servers to a virtual cloud (VMware) where only our servers are in. But as soon as we finished migrating everything we are fighting against SQL Timeouts and machine slowdowns we can't explain. Even though we ~ doubled the servers capacity while switching from physical to virtual. Now I googled and found that we are not alone. People are complaining about poor performance after moving to a cloud managed by VMware. Are there any known issues? Sometimes our services can't access a disk or SQL receives a timeout and we have no idea why.

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• KVM vs Hyper-V. Which hypervisor is best for windows guests?

  - by user198851

  I am currently testing openstack for windows guests (XP and 7). I have deployed openstack "all in one" on system with following specs Processor corei5. (4 physical cores and 8 Threads with HT Technology) RAM 8 GB. HD 500 GB. I have created 4 windows xp guests with 512MB RAM and 1VCPU. On each windows guest i have installed visual studio 2008 only. In nova.conf CPU Over-Commit ratio is 2 for better performance (as mentioned in openstack operation guide). Using KVM as hyerpvisor. I have observed poor performance when simultaneously using visual studio in four windows instances. How i can improve performance ? Should i use KVM or Hyper-V ? or any other suggestion ?

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• Practical way of keeping up-to-date backup servers?

  - by ftkg

  What is the approach generally used when you want to have backup physical servers? Currently I have a Linux server running a database, a samba share, a webapp and some scripts; and a Windows Server, running some third-party software. What I would like was to be able to have a ready backup server to enter in production in case of failure, but how to keep them up-to-date? I've seen some expensive solutions for Windows; for Linux I've wondered if I really have to build an array of scripts.

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• Perl: Fastest way to get directory (and subdirs) size on unix - using stat() at the moment

  - by ivicas

  I am using Perl stat() function to get the size of directory and it's subdirectories. I have a list of about 20 parent directories which have few thousand recursive subdirs and every subdir has few hundred records. Main computing part of script looks like this: sub getDirSize { my $dirSize = 0; my @dirContent = <*>; my $sizeOfFilesInDir = 0; foreach my $dirContent (@dirContent) { if (-f $dirContent) { my $size = (stat($dirContent))[7]; $dirSize += $size; } elsif (-d $dirContent) { $dirSize += getDirSize($dirContent); } } return $dirSize; } The script is executing for more than one hour and I want to make it faster. I was trying with the shell du command, but the output of du (transfered to bytes) is not accurate. And it is also quite time consuming. I am working on HP-UNIX 11i v1.

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• Deciding to use VM or native install for new hardware

  - by Billy Moon

  I have a Ubuntu 10.10 installation running on hardware. I upgraded the hardware, and am planning to move the system over. Whilst reading the many various ways to do this, I came across tools for making a virtual machine out of a hardware installation. I think this might make managing my server easier in the future if I run it as a virtual machine. Also, I will be able to easily split responsibilities of my server, for example running MySQL on a separate virtual machine hosted on the same physical machine. Is it a good idea to install my production server as a virtual machine inside another thin server installation? What are the pros/cons and pitfalls?

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• What could be causing LVM errors on first boot after install in Debian?

  - by ianfuture

  Hi, I've installed Debian (lenny) on a machine at home. It was set up during install to have a /boot partition, then the rest was encrypted, then had an LVM ontop of that, then all the other partitons inside LVM. After install completed and on first boot it asked for password to un-encrypt(same password for both drives) then it showed an error which said LVM could not find a physical device with a particular UUID or something similar. LVM install is over two HDs. One is 120GB and one 40GB. 120GB is Master on its IDE cable and this has /boot on it. 40GB is slave on the other IDE cable. Is there anything that could be done to rescue this install? Or diagnose problem? It took ages to get installed due to time spent enrypting drives and I'd rather not go through that again. :( Thanks.. Ian

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• VPC on Windows 7 very slow network

  - by Shigg

  I have a Windows 2003 virtual machine which I use for website testing. I've just installed Windows 7 and am using the new version VPC (not xp mode). When I try to copy a file - I need to copy some big databases across - I get a file copy speed of about 20k per sec. Copying from one PC to another on the real network transfers files at 13mb per second. Any ideas what may be causing this? I've turned off differential network compression on win 7. The Virtual HD is on a seperate physical drive to the OS. Running Windows 7 64 bit on a dual xeon with 16gb ram and 10,000 rpm drives. Tried installing VPC 2007 but windows blocks it running saying its not compatable. Many thanks for any ideas.

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• How to avoid loop limitation in a openvz container?

  - by mat.viguier

  On a openVZ containing Deb7 I need to lock the maximum size of a folder, which is used to upload on a php based web server. The directory is synced, so I have to lock the maxsize. MAXSIZE should be upgradable by adding some physical disk later ... I want to use a file as a block device for a file system. So I have done : dd if=/dev/zero of=/disk2/filesystem.dat bs=1M count=100 Then, I made the filesystem on it mkfs.ext4 filesystem.dat Then I tried to mount it : mkdir /opt/filesystem ; mount /disk2/filesystem.dat /opt/filesystem My OpenVZ (it is on a VPS) has no loop module in the kernerl. So I got Could not find any loop device as usual under OpenVz So i think I have to use FUSE, but I really do not know HOW .... Any idea on locking the size of directory under OpenVZ ?

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• Win7 Professional x64 16GB (4.99GB usable)

  - by Killrawr

  I've installed Corsair Vengeance CMZ16GX3M2A1600C10, 2x8GB, DDR3-1600, PC3-12800, CL10, DIMM and my BIOS picks up that there is 16GB, Windows says there is 16GB, CPU-z says there is 16GB. But it only says I can use 4.99GB out of 16GB. Motherboard is P55-GD65 (MS-7583) Supports four unbuffered DIMM of 1.5 Volt DDR3 1066/1333/1600*/2000*/2133* (OC) DRAM, 16GB Max Windows (Above screenshot specifies that I am on a System type: 64-bit OS) CPU-z Microsoft says that the physical memory limit on a 64 bit win7 professional operating system is 192GB. Dxdiag Run Command BIOS Screenshot #1 BIOS Screenshot #2 Why is my OS limiting me to just over a quarter of the available memory? is there anyway to increase it?

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• Intercepting LAN network traffic via WiFi

  - by user1613655

  Let's get straight to the point. This is my fictive network architecture: My question is: Would it be possible for Laptop B to intercept traffic sent and received by Laptop A? Please note that B only has WiFi access and no physical control over Router B. Furthermore, Router A and B create different wireless networks with different encryption keys. If both shared the same wireless network or Laptop B had LAN-access to Router B, the answer would be trivial, but I'm not sure how the answer turns out in this scenario :-/ Thanks for your valuable help!

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• HP DL380 G5 Predictive failure of a new drive

  - by CharlieJ

  Consolidated Error Report: Controller: Smart Array P400 in slot 3 Device: Physical Drive 1I:1:1 Message: Predictive failure. We have an HP DL380 G5 server with two 72GB 15k SAS drives configured in RAID1. A couple weeks ago, the server reported a drive failure on Drive 1. We replaced the drive with a brand new HDD -- same spares number. A few days ago, the server started reporting a predictive drive failure on the new drive, in the same bay. Is it likely the new drive is bad... or more likely we have a bay failure problem? This is a production server, so any advice would be appreciated. I have another spare drive, so I can hot swap it if this is a fluke and new drive is just bad. THANKS! CharlieJ

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