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• Creating rescue / install USB flash disk for CentOS

  - by wwwpanda

  For CentOS installation CDs, you can install OS, as well as booting into "rescue" mode so that you can do a chroot mount on the system partition for problem solving, even the system is installed in hardware RAID drives. How can we create a similar thing but on usb flash drive? I tried to do it with unetbootin, but when booting into the USB, eventually the CentOS setup still requires presence of CDs. Ultimately, I want to use this usb flash drive for remote disaster recovery through say HP iLo remote console / Dell iDrac etc.

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• running a web server with encrypted file system (all or part of it)

  - by Carlos

  Hi, I need a webserver (lamp) running inside a virtual machine (#1) running as a service (#2) in headless mode (#3) with part or the whole filesystem encrypted (#4). The virtual machine will be started with no user intervention and provide access to a web application for users in the host machine. Points #1,#2 and #3 are checked and proved to be working fine with Sun VirtualBox, so my question is for #4: Can I encrypt the all filesystem and still access the webserver (using a browser) or will grub ask me for a password? If encrypting the all filesystem is not an option, can I encrypt only /home and /var/www ? will apache/php be able to use files in /home or /var/www without asking for a password or mounting these partitions manually? Thanks

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• Apache Virtual host points to main domain

  - by user37143

  Listen 80 ServerName www.mydomain.com:80 DocumentRoot "/www/tomcat/webapps" Options Indexes FollowSymLinks Order allow,deny Allow from all Options ExecCGI NameVirtualHost *:80 ServerName blog.mydomain.com DocumentRoot /www/blog DirectoryIndex index.php index.html Options All AllowOverride All Allow from all on ssl.conf I have: *Listen 443 * Now if I access mydomain.com or blog.mydomain.com both are forwarded to /www/tomcat/webapps any idea where I went wrong? I have source complied Apache2. Should I add a virtual for the mydomain.com too? Thanks, Anpl

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• Disk operations in windows 7 are slow

  - by Skadlig

  My computer started lagging last Sunday. I tried to reboot it and it failed. Trying to boot into failsafe mode takes around two hours. It mainly freezes on two files: scsiport.sys and classpnp.sys When it finally has started all disc operations are really slow. When it has run for a while it goes faster, probably due to data moved into RAM instead. It froze on an other file before that was associated with Avast but uninstalling it didn't really help. A critical windows update was installed on Sunday but rolling back the update didn't help. I had a guess about the sound card but disabling the sound card drivers also didn’t help. I have an inkling of an idea that it might be Intel rapid storage technology that might be acting up but it doesn't allow me to reinstall it from failsafe mode and I haven't been able to log into normal mode for a while. I would appreciate suggestions regarding how to get into normal mode again and/or what can be the root cause.

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• Program keeping encrypted files.

  - by Giorgi

  I am looking for a program which will encrypt files specified by me and allow me to view/edit/delete those files without creating a virtual disk. I do not want to have virtual disk as a domain administrator can access it so truecrypt is not the possibility. One possibility is to use winrar with password protected archive but winrar serves a different goal so it is not very user friendly for this purpose. If it's possible it would be nice if the program does not creates temp files while I open the files. Any suggestions?

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• How to mount encrypted volume at login (Ubuntu 12.04, pam_mount)

  - by Nick Lothian

  I'm trying to get pam_mount working on Ubuntu 12.04. I have /dev/sda1 (encrypted partition) with /dev/dm-1 (ext4 formatted) inside it. Should ~/.pam_mount.conf.xml be trying to mount /dev/sda1 or /dev/dm-1? If I use the line: <volume fstype="ext4" path="/dev/dm-1" mountpoint="~/slowstore" options="rw" /> then it nearly works. It prompts for the password (ok, I'd like pam_mount to do that for me, but still..) then I get: pam_mount(rdconf2.c:126): checking sanity of luserconf volume record (/dev/dm-1) pam_mount(rdconf2.c:132): user-defined volume (/dev/dm-1), volume not owned by user If I do: sudo chown nick:disk /dev/dm-1 Then re-login the encrypted partition mounts correctly (ignoring th fact I have to reneter the password). However, if I log out completely the ownership on /dev/dm-1 gets reset to root:disk. What am I doing wrong?

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• Is it possible to run my other partition inside of a VM?

  - by Parris

  So I have dual boot machine with windows 7 and ubuntu 11. I would like to, at times, run a vm from one partition to another. For example sometimes I would like to do certain things in windows while still using ubuntu. At other times, perhaps the opposite would be more effective. Why? Well running a vm is fairly resource intensive, and depending on what I am doing primarily I would rather be in one operating system vs the other, or perhaps it is just convenient. An important consideration is that you should NOT need to "copy" or "duplicate" the partition in any way. The VM should just read the partition as if it were a standard image. Any ideas? I am using virtual box currently. I have also used virtual pc. I could probably get a copy of vmware workstation if needed.

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• How do i Change a Dammage Disk in a Raid 5

  - by Egakagoc2xI

  Hi, I have a 4 drives Raid 5 Server, which one of them is dammage, all drivers are hot plugged. My Question is, I Want to replace the dammage with a new one, Do I have to shutdown the server or just change the hard drives with the server on a it'll rebuild the every or there is a procedure to follow? My Server is a HP. Regards.

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• Toshiba Satellite A105-S4374 Hard Disk Failing

  - by Scott

  What do I need to get to replace my failing drive on my Toshiba Satellite A105 Laptop (approximately 3 years old)? Thanks!

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• Is it safe to remove Per user queued Windows Error Reporting?

  - by Rewinder

  I was cleaning up my laptop hard-disk, running Windows 7, and as part of the process I ran the Disk Cleanup utility. To my surprise I saw 2 items in the list that were quite large (both ~300MB). Per user queued Windows Error Reporting System queued Windows Error Reporting I guess I had never noticed these, because they were never that big. So, what are these items? Any particular reason why they became so large all of a sudden? And finally, is it safe to remove them?

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• How do I log file system read/writes by filename in Linux?

  - by Casey

  I'm looking for a simple method that will log file system operations. It should display the name of the file being accessed or modified. I'm familiar with powertop, and it appears this works to an extent, in so much that it show the user files that were written to. Is there any other utilities that support this feature. Some of my findings: powertop: best for write access logging, but more focused on CPU activity iotop: shows real time disk access by process, but not file name lsof: shows the open files per process, but not real time file access iostat: shows the real time I/O performance of disk/arrays but does not indicate file or process

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• Port-Forwarding in Virtual Box

  - by davidzaz

  I have Virtual Box setup with the following commands: vboxmanage setextradata myVm "VBoxInternal/Devices/pcnet/0/LUN#0/Config/transfer/HostPort" 50000 vboxmanage setextradata myVm `"VBoxInternal/Devices/pcnet/0/LUN#0/Config/transfer/GuestPort" 50000 vboxmanage setextradata myVm "VBoxInternal/Devices/pcnet/0/LUN#0/Config/transfer/Protocol" TCP On the host machine, the following command times out: telnet localhost 50000 What am I doing wrong? The above command does work on the guest machine.

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• Can I use VT-D with a windows host for a VM?

  - by Journeyman Geek

  I've got a fairly beefy gaming system that I also run occational virtual machines on. It runs windows 8 and the built in hyper V virtual machine software at the moment and has a core i7 3770 (which unlike the unlocked model, should support VT-D), an Asus P8Z77V and a gforce 660 video card(also asus). I figure that if I could use VT-D I could add a cheap dedicated 3d card for a VM, in case I wanted somewhat more than the 'basics'. I know KVM and Xen support this to some level on linux, but can I do so on windows? I'm open to switching VM software if need be.

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• Program for keeping encrypted files.

  - by Giorgi

  I am looking for a program which will encrypt files specified by me and allow me to view/edit/delete those files without creating a virtual disk. I do not want to have virtual disk as a domain administrator can access it so truecrypt is not the possibility. One possibility is to use winrar with password protected archive but winrar serves a different goal so it is not very user friendly for this purpose. If it's possible it would be nice if the program does not creates temp files while I open the files. Any suggestions?

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• VMware Studio: create Ubuntu 64bit virtual appliance

  - by Tom

  I'm using VMware Studio 2 to create virtual appliances. Now we want to make an appliance of a 64 bit Ubuntu distro, but it's not in the template list, like Redhat 64bit and CentOS 64bit. Is there a way to do this?

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• Subversion hard disk full

  - by user37914

  Our SVN server hd was full. Deleted a load of unwanted data on there, and all appeared to be well. However, new check-ins are now failing. Can't move '/repos/db/txn-protorevs/1000-vr.rev' to '/repos/db/revs/1/1001': Permission denied 1000-vr.rev does not exist. There are two other files in there: 9-9.rev and 9-9.rev-lock Edit: I have checked file permissions just in case, and all is as it should be.

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• 'Unlimited' free trial of Windows Server 2008 by deleting and reinstalling VM? [closed]

  - by MrVimes

  I am using Virtual Machine software (VirtualBox) to learn Windows Server 2008 R2 Network Infrastructure (70-642). Trouble is - I'm learning at an extremely slow pace and so the trial periods of my virtual machines are close to running out. If I delete the VMs then install WS2008R2 from scratch on new VMs is that violating the acceptable use policy of Microsoft? I am aware that I can extend the trial, but it seems I can only do that by 10 days at a time. Also I think having to re-install from scratch is a good way to reinforce the knowledge.

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• Nginx-Virtualmin : virtual server template

  - by Zulkhaery Basrul

  I want to edit nginx server template. I want every new virtual server created to use some specific nginx server configs and location settings. I want to add this line each time virtualmin created a server: if (!-f $request_filename) { rewrite ^/(.*)$ /index.php?q=$1 last; break; } Where can i find it? or what is the best way to add these line automatic ?

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• Rescue data from damaged hard disk

  - by Lexsys

  Hello. I have a 500 GB hard drive with one NTFS-partition on it. I can mount it with Ubuntu and view the contents. But when I try to copy something, I get an I/O error. Ok, I tried to make its image with dd. I/O error as soon as it starts. I have installed ddrescue, but its manual page says not to use it with drives, failing on I/O. Can I manage to get some information from this drive and how to do this?

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• How do I know if my disks are being hit with too much IO reads or writes or both?

  - by Mark F

  Hi All, So I know a bit about disk I/O and bottlenecks relating to this especially when relating to databases. But how do I really know what the max IO numbers will be for my disks? What metric might be available to me for working out roughly (but needs to be a good approximation) of how much capacity (if you will) have I got left available in I/O. I've seen it before where things are bubbling along nicely and then all of a sudden, everything screams to a halt, and it ends up being an IO bound problem. Is there a better way to predict when IO is reaching its limits? This article was interesting but not giving the answer I desire. "http://serverfault.com/questions/61510/linux-how-can-i-see-whats-waiting-for-disk-io". So is my best bet surrounding just looking at 'CPU IO WAIT'? There must be a more reactive method for this? Best, M

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• Windows XP x64 virtual machine (VMWare ESX) using only 2 CPUs (out of 4)

  - by Mac

  I just converted a physical Windows XP x64 machine with 4 CPUs to a VMWare virtual machine with 4CPUs (on a ESX server) using the VMWare Standalone Converter. Everything worked just great, except that the OS now seems to use only 2 CPUs (when 4 are installed, see the following image). This must be a Windows XP issue rather than a VMWare issue, but I can not really rule out any reason at this stage. What can I do?

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• backing up ntfs disk using rsync on ubuntu

  - by user70366

  For a long time I was using windows. I have a separate drive I use to keep copies of my media files, photos etc. on, which I periodically backup to an external drive. In Windows I used SyncToy to do this. After my Windows stopped booting, I decided to switch to Linux (Ubuntu 10.10). That seems to be going fine, but now I want to backup my drive to the external drive like before. Mostly the two drives will be already the same with maybe about 10GB of extra files added. So I try to use rsync to synchronise the two drives like this: rsync --dry-run -rvlt --modify-window=1 /media/Antonio1TB/Backup /media/FREECOM\ HDD/Backup The problem is the dry run indicates that every file on the drive will be copied. Not just the files I have recently added. What is the correct command to synch two NTFS drives under Ubuntu so that files that already exist don't get copied again? Thanks.

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• Disk controller speed responsible for slow write speeds?

  - by vizvayu

  I have question. I'm using ESXi 4.0U1 in an IBM x3200M2 with an integrated LSI 1064e RAID controller, without any kind of cache. I have 3 250GB HOT-SWAP SATA HDs configured in RAID1E (IME). ESXi works fine, read speed are quite OK, but write speeds are incredible slow, never more than 8MB/s, and this is the best case scenario, benchmarking with iozone streaming writes, using a VMWare Paravirtual controller and with only this VM active, no swapping of any kind (total vm memory reserved). Already wrote to IBM but I don't have any kind of pay support so they didn't even answered, so I'm just wondering... anybody has any experience with a similar setup? I just want to be sure this is hardware related and can't be fixed with some kind of config option, because I'm thinking on buying a new RAID controller (Adaptec 2405 looks nice). Thanks again!

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• Adding new virtual disks to a Windows host in ESX “live”

  - by warren

  Building on my previous question about RHEL, how do you add get the guest OS to recognize that you've added new drives to it without a reboot? I have Windows 2003, XP, and 2008 guests running on ESX 4. I've added new virtual disks to the VM, but have not figured-out how to get the guest to recognize them without a reboot. Is this possible? If so, how?

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• windows 7 virtual wireless adapter keeps going to sleep

  - by conners

  Just a quick question that I can't see mentioned anywhere online. I have a Windows 7 box configured like these guys recommend http://www.itgeekdiary.com/windows-7-as-an-wi-fi-access-point/ simply so that I can have my Windows 7 box as a wifi access point or a wifi emitter. It's also called a Microsoft Virtual WiFi Miniport Adapter. But it powers off and shuts down automatically and stops working. Basically everything works as intended and then - well -it will stopped working when I am not at the Windows 7 PC for a long time. The problem seems to be that every time my PC goes to "power save / sleep" and in the morning the Windows 7 machine "wakes" but blooming heck the wifi has stopped and you have to power cycle the PC (which is very uncool). When I power Cycle I have to do the following as administrator C:\Windows\System32\netsh.exe wlan start hostednetwork I then tried a gazllion things involving services and power management and eventually discovered that if I run the following commands as administrator it will be ok (for a bit) but every 3rd ot 4th time I try this "trick" it simply fails. the trick that seems to work 3 out of 4 times (i.e. "most" of the time) C:\Windows\System32\netsh.exe wlan stop hostednetwork C:\Windows\System32\netsh.exe wlan start hostednetwork But why does this only work "some" of the time? What else I did by myself: on every manage adapter properties (that relates to the wifi) I right clicked [configure] [power management] /disabled/ "allow the computer to power off to save power" <- this made no difference Also (and this is a bit annoying) there is no system tray app/GUI for the Microsoft Virtual WiFi Miniport Adapter output signal ... none... so (lame as it sounds) the ONLY way I can check if it's on is to physically go to another device and SCAN.. lame so my question can probably be solved by any of the following: a) can I stop Windows 7 sleeping this wifi when the machine sleeps b) can I force Windows to force wake this process on wake? if so how? c) what is the service / process REALLY called and how do I restart it if it crashes d) how can I flush the wifi properly rather power cycle the host machine e) anyone have a link to an program or app that can sit in the system tray that shows windows 7 wifi hotspot emission status (on/off/etc etc) Since I am a programmer I can easily write a vbs script / windows exe to fix this (and I will share this solution) and the gui problem if I can work out the actual service that is running that netsh stops/starts

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