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• Find and free disk space that is unused but unavailable (due to file system error, etc.)

  - by Voyagerfan5761

  Sometimes I get the feeling that if an app such as μTorrent allocates files on my FAT32-formatted flash drive, but then is killed or crashes (as happens more than a few times a month), that space just disappears from my file system. Whether or not that is the case, sometimes I do get a chill from wondering if I've lost hundreds of MB in available storage due to carelessness or malfunctions. Checking my disk with WinDirStat just makes it worse, because I see the huge "<Unknown>" item at the disk root staring at me, eating up well over a gigabyte. It might be FS inefficiency (due to 32 or 64kb sector/cluster size and a lot of tiny files) or it might be a glitch... Is there a tool I can download and run to check my file system and make sure that there aren't any unused allocated blocks on the disk? I want to make sure I'm not losing any disk space to I/O errors, etc.

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• Is it possible to a VM inside a VM (e.g., KVM on Vmware)?

  - by lorin

  I'd like to do some development on Eucalyptus, an open source project which provides an Amazon EC2 interface for launching virtual machine instances on a collection of privately managed nodes. I'd really like to be able to do some of the development on my desktop, rather than having to deploy Eucalyptus on our shared local cluster each time I make a change to the source code. (Especially since there are a group of us sharing that test cluster). Unfortunately, my desktop machine is a Mac, which won't run Eucalyptus natively. I do have VMWare Fusion, and it would be really nice if I could do my Eucalyptus testing inside a VMWare instance. The problem is, to test out Eucalyptus, it will have to launch (KVM or Xen) VM instances. I've got no idea if it's possible to actually launch a KVM or Xen instance inside a VMWare instance.

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• SQL Server 2008 Hardware Recommendation;

  - by Jay

  Hi,I work for a large fortune 500 company. We have several SQL 2005 Servers running on DELL Poweredge 2950 with 8 GB RAM and 4 CPU's. Storage is DMX RAID 10. We are in the process of migrating to sql 2008. We are planning on consolidating multiple sql 2005 into single SQL 2008 Server.If anyone can suggest hardware I would appreciate. We have looked at DELL R710, I was wondering if there are other servers that are good for running SQL 2008. Thanks

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• How to use qcow2 disk image in Linux?

  - by sauparna

  I have a large qcow2 formatted disk image, which I use as storage. Often I need to move data to and from this disk image. I mount the disk using the qemu-nbd tool as follows: modprobe nbd max_part=63 qemu-nbd -c /dev/nbd0 /host/disk100G.img mount /dev/nbd0p1 /home/rup/disk But disk access fails every now and then in the midst of some I/O operation with an "Input/output error". At that point I have to manually unmount the disk and re-mount it so that I can run the program again: qemu-nbd -d /dev/nbd0 umount joborkhaki/ What could be the reason for this? Is there a better tool that I can use to maintain a qcow2 disk image?

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• Why did my Cisco router hang?

  - by Mike Pennington

  We have a Cisco 1841 in our storage IDF that was originally running a 12.4(1) IP-BASE image; I wanted to upgrade to an advancedservicesk9-mz image, but the flash did not have enough space, so I deleted the running image. Later I tried inserting a larger CF from a Catalyst4500, which crashed the 1841 router (now without a bootable image). Using another 1800 series router, I loaded the 12.4(25g) advancedservicesk9 image and verified the image checksums. I set the confreg to 0x2102 from rommon and booted the new image; however the 1841 now hangs indefinitely after printing the IOS export control banner. I have tried four other images, all with the same results. What is wrong with this router? UPDATE 1: I tried loading images from a FAT16-formatted USB, but this didn't work either. I also tried tftpdnld from rommon, but got a get_mac_address(): Search T_IDPROM_MACADDR (0xc3) failed Illegal MAC address. error and the file would not load.

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• Monit and Thin and Unfound Gems

  - by TenJack

  I've been using Monit to monitor my Thin server and everything was working until I upgraded my Rails version from 2.3.4 to 2.3.14. Now when I try and start Thin using monit it gives me an unfound gem error: Missing the Rails 2.3.14 gem. Please `gem install -v=2.3.14 rails` I thought this may be a GEM PATH issue and also tried setting the GEM_HOME and PATH variables in the start command: check process thin3001 with pidfile /home/blahblah/apps/Vocab/shared/pids/thin.3001.pid start program = "/usr/bin/env PATH=/usr/lib/ruby/gems/1.8/gems GEM_HOME=/usr/lib/ruby/gems/1.8/gems /usr/bin/ruby /usr/bin/thin -C /etc/thin/vocab.yml start -o 3001" stop program = "/usr/bin/ruby /usr/bin/thin -C /etc/thin/vocab.yml stop -o 3001" if totalmem > 150.0 MB for 5 cycles then restart group thin It's strange because if I run the start command in the console it works fine, it's only within monit that I get the missing Gems error.

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• kvm memory changes via virsh not propagating to vm

  - by kevintmckay

  Hi I just started using kvm on rhel6 and after creating a vm I tried to increase the memory but the changes I amde in the xml file do not propogate to vm, even after bouncing vm and restarting libvert? [root@kvm01 qemu]# virsh dominfo dev-kvm01 Id: 2 Name: dev-kvm01 UUID: 9b2bf581-2807-3116-b176-60e9c0559943 OS Type: hvm State: running CPU(s): 2 CPU time: 1975.3s Max memory: 7864320 kB Used memory: 7864320 kB Persistent: yes Autostart: disable Security model: selinux Security DOI: 0 Security label: system_u:system_r:svirt_t:s0:c47,c760 (enforcing) [iknowmed@dev-kvm01 ~]$ free total used free shared buffers cached Mem: 3632284 3614508 17776 0 3980 3491676 -/+ buffers/cache: 118852 3513432 Swap: 5668856 0 5668856

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• Incredibly high latency for Ubuntu guest on Hyper-V

  - by Mark Henderson

  I've got several Ubuntu 10.04 virtual machines running as Hyper-V guests on Windows Server 2008 R2 SP1 and they're all perfectly fine. Today I installed my first Ubuntu 11.10 virtual machine and I'm seeing rediculous pings: These servers are all connected via gigabit to a local LAN, with almost no network traffic at all1, with a legacy network adapter in Hyper-V. I'm a bit of an Ubuntu n00b so I don't really know where to go from here. Any ideas? free -m reports: total used free shared buffers cached Mem: 485 470 15 0 63 299 -/+ buffers/cache: 107 378 Swap: 507 20 487 This is within a few mb of our other Ubuntu servers that are on 10.04. I removed the Legacy NIC and installed a Synthetic one in Hyper-V and this did improve the numbers, in that they're around 10-30ms now, but I would still be expecting <1ms response times. 1As a comparison, I have another Ubuntu 10.04 guest on Hyper-V almost 1,000km away that has a ping of 33ms

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• Command-line access to remote MySQL server

  - by Jerry Krinock

  I administer a website on a remote, shared host. My web host offers MySQL, and I am able to access this from my Mac OS X computer using a GUI program, Sequel Pro. That works great. But I want to script some queries, and Sequel Pro is not scriptable. What should I do? I've read about tunneling to mysql via SSH. I have shell access to the server, with an SSH key on my Mac, so ssh [email protected] -p 7978 gets me in. Should tunneling the MySQL port 3306 work? Like this? ssh [email protected] -L 3306:127.0.0.1:3306 (It "times out" after a minute.) Do I need to install mysql on my Mac?

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• Excel 2003 opening files on network

  - by Luke

  The network is laid out with an XP Pro computer as the server hosting files, then 3 XP computers connecting to it for filesharing, all on it's own router. One computer can open .xls files no problem, and she runs Office XP. The other two computers run Office 2003, and cannot open any shared files by double-clicking them, or by selecting File-Open in Excel. If the file gets copied to the local computer, it opens instantly. I have tried disabling the AV on all computers, disabling the Windows firewall, and doublechecking permissions on the server. I have also tried disabling DDE, but that doesn't help at all, just like Tools-Options-unticking Ignore other applications. Any ideas? This apparently started a couple days ago

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• How to set up a software VPN when moving a server to the cloud

  - by Neal L

  I work in a small company with one office in Dallas and another in Los Angeles. We run a Fedora server at our Dallas location and use a Linksys RV042 at each location to create a VPN connection between the sites. Every time the power or internet goes out in Dallas, our server is inaccessible so the entire company goes down. Because of this, we would like to use a shared server in the cloud (something like Linode) to avoid this problem. As a relative novice to VPN configurations, I would like to know if it is possible to set up a software VPN on the cloud server and connect our local networks in Dallas and LA to that VPN. I've read about openvpn and ssh vpns, but I don't know it is the best option. Could anyone with some experience point me in the right direction on the right combination of software VPN and hardware for this? We're open to new hardware to make this happen. Thanks!

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• Creating/Editing Existing Documents

  - by Caroline Jones

  A document was shared with me, enabling me to edit it. However, whenever I open it, it only lets me view it, and anytime I try to open the "Open with Google Docs" tab, it acts as if I never pressed it, same as if I try to download it. Same with whenever I try to create a new document. I'll click "Create" and then "Document" and it won't be registered. I really need these issues fixed pronto, as I have to use this software every day. Please help!!

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• PCs using certain IP addresses cannot ping out

  - by Steve McCall

  I'm having a very strange problem which I just can't get past. The way our network is set up, we have 2 locations. The main office with all our PCs, and servers/ We are then joined to a local ISP via microwave link and they provide our internet gateway and house an additional storage server for us. All of the network infrastructure is within our office The problem is... When some PCs (and servers) are assigned IP addresses, they cannot ping the gateway or remote server however the remote server can ping the PC. Most of our internal IP addresses work fine but specific ones (e.g. .29) has this problem all the time. There is nothing else using the ip address and no other network problems. When we switch the IP on the PC, it works fine. Please help, I'm going mad. Thanks, Steve

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• Setting up a Windows Server 2008 R2 DC + Fileserver : native or virtual?

  - by user126890

  I want to deploy a new DC + Fileserver using Windows Server 2008 R2 SP1 Standard Edition on a Dell PowerEdge R410 and iSCSI storage for a small business (~30 people). Should I install the system native on the server or use a virt layer? I don't have a budget for virtualization so i gotta go with something free... What's a better working routine, taking snapshots of vm's or taking backups (Acronis/CloneZilla) of systems? If I use a virt system, I need a GUI for some people in the business to reset the system to a earlier state in emergency situations. I wanted to install phpVirtualBox once but never finished, is it suitable in a productive environment? server specs: Intel Xeon E5620 CPU (2,40GHz, 4C, 12MB Cache) 8GB RAM Dual Rank LV RDIMMs 1333MHz 2x 1TB SATA 7,2K 3,5, RAID1

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• PostgreSQL server: 10k RPM SAS or Intel 520 Series SSD drives?

  - by Vlad

  We will be expanding the storage for a PostgreSQL server and one of the things we are considering is using SSDs (Intel 520 Series) instead of rotating discs (10k RPM). Price per GB is comparable and we expect improved performance, however we are concerned about longevity since our database usage pattern is quite write-heavy. We are also concerned about data corruption in case of power failure (due to SSDs write cache not flushing properly). We currently use RAID10 with 4 active HDDs (10k 146GB) and 1 spare configured in the controller. It's a HP DL380 G6 server with P410 Smart Array Controller and BBWC. What makes more sense: upgrading the drives to 300GB 10k RPM or using Intel 520 Series SSDs (240GB)?

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• forward all mail on a specified domain to script

  - by David

  Hey all! I run a disposable e-mail service that accepts all incoming mail and forwards it to a PHP script that stores it in a database for people to view. Before now, I have been on shared hosting with cPanel, which makes it easy to pipe e-mails to a script. Now, however, I got my own VPS, and it doesn't have cPanel. How do I pipe e-mails to script? Further, how do I pipe emails to any address on certain specified domains to my script? You see, aside from the main domain, there are several alternate domains that people can use if the main domain is blocked, and on each domain I want any address to be usable (xyz@domain, abc@domain, anythingelse@domain). The VPS has Ubuntu 9.04 installed, and I have been experimenting with Postfix, though I can switch to Exim or Sendmail if it is easier.

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• Best way to replicate / mirror 100s of databases in SQL 2005

  - by mrwayne

  Hi, I currently host around 400-500 SQL 2005 databases of varying sizes (1-10 gig) each. I am aware of most of the different methods available and the general pros/cons of mirroring, log shipping, replication and clustering, but i am not aware of how well they tend to perform when its employed at the size i have specified (400-500 unique databases). Does anyone have any good advice on what is likely the best method for having the ability to fail over to another server with this sort of setup? Fail over does not need to be immediate, i'm just looking for something better than taking backups every day and moving them to storage. I'm preferably looking for something that would also makes it easy to manage the databases in bulk (as opposed to one at a time). Thanks for your input!

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• git networking for small team

  - by takeshin

  I'm trying to set up git for my programming team. My setup is: 1. example.com (Ubuntu server) IP: 192.168.1.2 (public: xxx.yyy.yyy.zzz) main git repository in /var/www/testgit user: mot (root) 2. host2, Ubuntu IP: 192.168.1.101 git clone of main repo in ~/public_html/testgit1 user: nairda 3. host3, Ubuntu IP: 192.168.1.102 git clone of main repo in ~/www/testgit2 user: mot 4. host4, Windows Vista, Samba, msysgit IP: 192.168.1.103 git clone of main repo in c:\shared\testgit3 user: ataga I start a new main repo: cd /var/www/testgit1 git init Now, a lot of questions: Which groups and users do I have to create? How to set up required ssh keys? (I'm playing with gitosis, but with no success by now.) How to make the main repo visible to other hosts? How to clone this repo on the hosts? How to pull changes from others to main repo?

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• Windows XP Installation issue - cannot find hard disk

  - by Marco

  A friend of mine gave me a laptop with Windows 8 installed and nothing else. I don't like it so I am trying to remove it by installing Windows XP. I have a windows XP installation CD that I have used before and worked fine, but didn't work when I tried to install it on the Windows 8 machine. It keeps telling me I don't have a drive to install to. Then I log into Windows 8 again and install check partitions. I found 2 and tried to make a new one but it will only let me make one of 69mb. Next, I tied to find a way to go back to XP with BCD install and try to set the boot loader for XP but it wasnt there. Somehow I deleted the bootloader for Windows 8 and now it asks me for a recovery tool for media. I am not familiar with the laptop specs, but it is a Toshiba with about 250GB storage, and above 1GHz processor.

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• Setting up a NetApp as a simple FC LUN carver

  - by MikeyB

  For a particular application, I want to configure a NetApp filer (7-mode) to be as close as possible to an old-fashioned storage subsystem without snapshots or fancy features. vol create vol_ESX -s volume aggr1 1500M vol options vol_ESX nosnap on vol options vol_ESX nosnapdir on vol options vol_ESX fractional_reserve 0 snap sched vol_ESX 0 0 0 snap reserve vol_ESX 0 # Ensure no snapshots exist on vol_ESX snap list vol_ESX # Create a LUN or multiple LUNs that take up the entire volume lun create -s 1565523968 -t vmware /vol/vol_ESX/lun0 lun map /vol/vol_ESX/lun0 challenger Is this safe? Is this the Best Way of doing what I'm trying to accomplish? Is there anything else I should set?

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• USB Thumb Drive not recognized in Hyper-V Manager

  - by Vazgen

  I have the free, standalone core Hyper-V Server 2012 running on my physical machine. I set up remote management from my Windows 8 client. When I proceed to create a virtual machine I would like to install the OS from a usb thumb drive but it is not recognized in Hyper-V Manager on my client (when the USB is plugged into the physical server) nor is it recognized in Server Manager under File and Storage Services Volumes Is there a role needed to recognize external usb flash drives? Because I think this standalone version is just core Hyper-V role and that's it... but this is such a basic functionality. Can anybody comment.

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• User Permissions: Daemon and User

  - by Eddie Parker

  Hello: I often run into this issue on Linux, and I'd love to know the proper way of solving it. Say I have a daemon running. In my example, I'll use LigHTTPD, a webserver. Some software, like Wordpress, enjoys having read/write access to files for updating applications via a web interface, which I think is quite handy. At the same time, I enjoy being able to hack on my files using vim, using my local user account, 'eddie'. Herein lies the rub. Either I chown everything to lighttpd or eddie and a shared group between them both, and chmod it 660, or perpetually sudo to edit the damned things. The former isn't a bad solution, until I create a new file in which case I have to remember to chmod it appropriately, or create some hack like a cron job that chmods for me. Is there an easier way of doing this? Have I overlooked something? Cheers, -e-

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• Clone remote CentOS server to local test server?

  - by dannymcc

  We have a dedicated server running ContOS 5.5. The server runs our Magento store and a basic php website with mysql. I have a spare rack server in my office (HP ProLiant DL360 G4) that has more than enough storage space to store a duplicate of our dedicated server. I would like to clone the dedicated server entirely and have a local duplicate. It wouldn't need to be kept in sync because I can do that with GIT. The reason I want to do this is simple; learn more about the dedicated server and CentOS. Is this possible? I have SSH access to the dedicated server and obviously complete access to the local server.

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• Why are they putting "processors" on hard drives?

  - by Celeritas

  What does it mean when they have a processor on the hard drive, how does it work, and what benfit does it have? I don't understand - the CPU is the processor and the hard drive transfers it's contents to RAM. Do have additional processors, preprocess the data some how? Here's some examples Western Digital WD Black WD1002FAEX 1TB "Dual processor speed" NETGEAR ReadyNAS 312 2-Bay Diskless Network Attached Storage "Dual-core Intel 2.1GHz processor and 2GB on-board memory" and routers now have processors too, why's that nescecary? I guess it sort of makes sense - some logic needs to happen for the packets to be read in to know which ports to send them out on, but why did old routers not need them? Example or wireless router with processor: "Dual-core processor"

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• hosting people asking for my account username and password to enable curl and socket function only for me

  - by Jayapal Chandran

  I have hosted my site in a shared environment. My hosting people disabled socket function all together. and they said that we can enable only for you if i given a written statement. I did but they asked for my control panel login details so they will run some kind of script to enable it. Is it right for the hosting company to ask for credentials. They have the total control so why cant they do it? Edit: Before six months many websites in their server got hacked. So they think it would be because of socket functions and had disabled it. They say they can enable it for specific users who do programming using that and that is by email request.

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