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  • Podcast: Dell Perot Systems Relies on Oracle In-Memory Database Cache

    - by john.brust
    Recently we spoke with Bill Binko, Technology Consultant at Dell Perot Systems, about a high volume web-based content delivery system they implemented for a client with Oracle In-Memory Database Cache. Their client needed to respond to ~1 billion hits (web requests) per day, but hadn't been able to support this load. Oracle In-Memory Database Cache allowed for multiple & complicated queries to take place without ever hitting the disk...providing sub-millisecond response time and ability to manage much higher high volumes of data. Old System: Old SQL Server Database, over 300 servers, difficult to maintain. New System: One Oracle Database 11g instance, multiple Oracle RAC nodes, backed up by Oracle Data Guard, and Oracle In-Memory Database Cache to cut query response times by 10x. Listen to the podcast.

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  • Wubi 12.04 installation error executing command command

    - by Erik Lau
    I have tried to install wubi but have not had luck because there is an error executing command: command=C:\Users\Me\AppData\Local\Temp\pyl4266.tmp\bin\resize2fs.exe-f C:\ubuntu\disks\root.disk 17744M retval=1 stderr= stdout=resize2fs1.40.6 (09-Feb-2008) Usage: /cygdrive/c/Users/Eriks/AppData/Local/Temp/pyl4266.tmp/bin/resize2fs.exe-f C:/unbuntu/disks.root.disk17744M [-d debug_flags][-f][-F][-p] device[new_size] I do not understand what is the problem. Here is my log file. https://skydrive.live.com/redir?resid=B4F19CA027FFAD89!324 Please let me know what can be done to fix this error.

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  • Install unetbootin on Ubuntu 12.04

    - by Matteo
    I'm trying to install UNetbootin on Ubuntu 12.04 LTS. I downloaded the executable file from this link and followed the instructions below: If using Linux, make the file executable (using either the command chmod +x ./unetbootin-linux, or going to Properties-Permissions and checking "Execute"), then start the application, you will be prompted for your password to grant the application administrative rights, then the main dialog will appear, where you select a distribution and install target (USB Drive or Hard Disk), then reboot when prompted.\ So I typed on my terminal sudo chmod +x unetbootin-linux-584 and tried to execute the binary file with ./unetbootin-linux-584 but got this output: ./unetbootin-linux-584: error while loading shared libraries: libXrandr.so.2: cannot open shared object file: No such file or directory However when I checked for libraries libXrandr on my system I actually found them $> locate libXrandr /usr/lib/x86_64-linux-gnu/libXrandr.so.2 /usr/lib/x86_64-linux-gnu/libXrandr.so.2.2.0 /usr/lib/x86_64-linux-gnu/libXrandr_ltsq.so.2 /usr/lib/x86_64-linux-gnu/libXrandr_ltsq.so.2.2.0 so I really don't have a clue of what's the problem and how can I fix it, any ideas?

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  • I dont know how to run e2fsck or fsck and what are their differences

    - by Salvador
    My Kern.log file advise me to run e2fsck. Aug 30 14:10:11 ubuntu kernel: [ 122.378292] EXT4-fs (sda11): warning: maximal mount count reached, running e2fsck is recommended Aug 30 14:10:11 ubuntu kernel: [ 122.387488] EXT4-fs (sda11): mounted filesystem with ordered data mode. Opts: (null) /dev/sda11 is not mounted within my current OS (Ubuntu 10.04) I have known that e2fsck is a dangerous command when running against the root partition which is at the same hard disk as sda11. I would trust in this solution better than others: Can I run fsck or e2fsck when Linux file system is mounted?

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  • Coherence 3.7.1 Released

    - by JuergenKress
    Oracle Coherence 3.7.1 introduces REST API, exalogic infiniband integration, improved data access performance due to more efficient in-memory and disk-based storage, and query explain plan support and much more, download now! View the webcast: Unbeatable Performance for your Cloud Application Foundation. To download Coherence 3.7.1 please visit OTN. Coherence Screencasts: Coherence 3.7.1 – Extend Only Keys Coherence 3.7.1 – REST Support Coherence 3.7.1 – POF Object Identities and References Coherence 3.7.1 – POF Annotation Support Coherence 3.7.1 – Query Explain Plan For more information please visit the Oracle Coherence Knowledge Base For regular Coherence information become a member in the WebLogic Partner Community please first login at http://partner.oracle.com and then visit: http://www.oracle.com/partners/goto/wls-emea Blog Twitter LinkedIn Mix Forum Wiki Technorati Tags: Coherence,Coherence 3.7.1,Oracle,WebLogic,J2EE caching,OPN,Jürgen Kress

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  • Unable to Install GRUB in /dev/sda on raid drives

    - by Henry
    I'm trying to install 12.04LTS on a server but keep running into the unable to install grub error like so "Unable to Install GRUB in /dev/sda". The drives are in raid1 and I'm using fakeraid on a supermicro motherboard, which according to the manual is fully supported. I've tried installing both from USB and CD-R but still no luck. I'm not dual booting with any other OS, just using 2x320gb drives and have been choosing to install using the entire disk. Any ideas what I'm doing wrong or can do to fix this? Thanks

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  • Disable suspend / hibernate via the policykit

    - by redonath
    I am trying to run Lubuntu 12.04, but if the computer suspends I am unable to bootup again. Instead I see the bios post, the hard disk light flickers once and I have to install again (I have tried to re-install grub2). I am new to Linux and what I found that best answered my question was posted by James Henstridge. The instructions say to create disable-shutdown.pkla in etc/polkit-1/50-local.d/ but this directory does not exist, so do I create a folder titled 50-local.d in poolkit-1 or do I have to place this file elsewhere?

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  • subprocess installed post-installation script returned error exit code 1

    - by Laura quintero
    I had installed snort on ubuntu 11.04 and uninstall it because I had problems, to reinstall it leaves a problem: Reading package lists ... done Building dependency tree Reading state information ... done Calculating upgrade ... ready 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded. 1 not fully installed or removed. 0 B will be used for additional disk space after this operation. Do you want to continue [S / n]? s Configuring snort (2.8.5.2-9.1) ... * Stopping Network Intrusion Detection System snort * - No running snort instance found * Starting Network Intrusion Detection System snort [fail] invoke-rc.d: initscript snort, action "start" failed. dpkg: error processing snort (- configure): subprocess installed post-installation script returned error exit code 1 Errors were encountered while processing: snort E: Sub-process / usr / bin / dpkg Returned an error code (1) any solution? Commands allready used apt-get clean apt-get remove snort sudo apt-get dist-upgrade dpkg - remove - force-remove-reinstreq snort and nothing.

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  • Recover files from a SATA drive from USB

    - by Shane
    I've damaged the drive I had in my windows laptop and now I want to try to recover as many files as possible. I know very little about linux though. I have Ubuntu 10.04. I have a docking station for the drive and it is connected to my linux machine. The drive appears in disk utility. Unfortunately, this is where I have no idea where to proceed. Any help is appreciated and I can provide more info if needed.

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  • Unable to add host running ubuntu for nagios monitoring?

    - by karthick87
    I am unable to add ubuntu server in nagios monitoring. I am getting "CHECK_NRPE: Socket timeout after 40 seconds." error for few services "CPU Load, Cron File Check, Current Users, Disk Check, NTP Daemon, Time Check, Total Processes, Zombie Processes". Please find the snapshot for the same below, Details: Installed nrpe plugin in ubuntu host. On running the below command from remote host running ubuntu (not nagios server) am getting the following output, root@ubuntu-cacher:~# /usr/local/nagios/libexec/check_nrpe -H localhost NRPE v2.13 But in nagios server i am getting "CHECK_NRPE: Socket timeout after 40 seconds." error. Additional Information: Am running nrpe under xinetd, when i execute the following command i dont get any output, root@ubuntu-cacher:~# netstat -at | grep nrpe But getting the following output when checking, root@ubuntu-cacher:~# netstat -ant|grep 5666 tcp 0 0 0.0.0.0:5666 0.0.0.0:* LISTEN tcp 0 0 172.29.*.*:5666 172.29.*.*:33693 ESTABLISHED tcp 0 0 172.29.*.*:5666 172.29.*.*:33692 ESTABLISHED

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  • grub-probe: error: cannot find a GRUB drive for /dev/sda1

    - by Thilina
    I'm trying to add windows 7 for my new 12.10 grub bootloader. None of the things worked out; such as .. copying bootx64.efi methods, I'm getting this output: grub-probe --target=fs_uuid /boot/efi/EFI/Microsoft/Boot/bootmgfw.efi grub-probe: error: cannot find a GRUB drive for /dev/sda1. Check your device.map. ....... my device map ....... (hd0) /dev/disk/by-id/ata-WDC_WD6400BPVT-55HXZT3_WD-WXD1EA1MSVR4 ....... 40_custom ..... menuentry "Microsoft Windows x86_64 UEFI-GPT" { insmod part_gpt insmod fat insmod search_fs_uuid insmod chain search --fs-uuid --no-floppy --set=root 80BD-E086 chainloader (${root})/efi/Microsoft/Boot/bootmgfw.efi } When booting to windows 7 give me blank black screen with a cursor blinks for 2 seconds then reboot, I've tried boot-repair too. I think I'm missing Windows UEFI Bootloader files.

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  • Windows7 Gone after Ubuntu dual boot install

    - by Adi
    I had a very hard time to dual boot install Ubuntu 12.04 Apparently, Ubuntu has restriction of 4 partitions and I already had 4, so it just couldn't recognise my partitions. This was something I realised too late, but finally got to install Ubuntu. Now, even though Windows 7 option is listed when I try to boot my laptop, it doesn't really let me boot and just loops back to begin. I tried windows repair DVD also, didn't work. I was fine with complete fresh install of windows too, but Windows CD didn't detect my Hard Disk Drive or any partitions (even though the original C drive with Windows is still an NTFS partition, according to gParted, and I can access the data from same using Ubuntu log in). My Ubuntu works fine, but I need windows log in also. Any suggestions anyone?

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  • Can't boot freshly burned Ubuntu cd

    - by user89004
    So I just burned a Ubuntu 12.04.1 powerpc .iso on a cd for my iMac G5 running Mac OS X 10.4.11 and it won't even recognize the cd. I burned it on my dad's Windows 7 laptop as the process is way easier (just 2 clicks). Mac OS X 10.4.11 gives me an error when it starts and when the CD is in saying "the disk you inserted was not readable by this computer". What's funny is that I burned a Ubuntu Minimal .iso on a CD and it would totally read that and even boot it though it gave me some errors afterwards and I couldn't install. I even tried going into openfirmware and hitting boot cd:,\tbxi but I get the error "Warning sector size mismatch can't OPEN cd:,\tbxi Can't open device or file" Was there something wrong with the .iso I burned? Mac OS X 10.4.11 won't even mount that .iso it tells me that the HFS file system is corrupt or something, but I know the .iso doesn't contain HFS file system. Any help? I downloaded the .iso from http://cdimage.ubuntu.com/releases/precise/release/ubuntu-12.04-desktop-powerpc.iso

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  • Incremental file system backups

    - by brunopereira81
    I use Virtual Box a lot for distro / applications testing purposes. One of the features I simply love about it is virtual machines snapshots, its saves a state of a virtual machine and is able to restore it to its former glory if something you did went wrong without any problems and without consuming your all hard disk space. On my live systems I know how to create a 1:1 image of the file system but all the solutions I'v known will create a new image of the complete file system. Are there any programs / file systems that are capable of taking a snapshot of a current file system, save it on another location but instead of making a complete new image it creates incremental backups? To easy describe what I want, it should be as dd images of a file system, but instead of only a full backup it would also create incremental. I am not looking for clonezilla, etc. It should run within the system itself with no (or almost none) intervention from the user, but contain all the data of the file systems.

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  • Unable to boot either Ubuntu or Windows after kernel panic

    - by Josh Taylor
    Hi, Today I have been unable to boot into my Ubuntu (10.10) or Windows (7) partition. Ubuntu kernel panics on boot with the error: init: hash.c:296: Assertion failed in nih_hash_search: hash != NULL I can boot into a LiveUSB environment, and from there can access all my files on my 3 partitions (1 ext4, 2 NTFS). I have also ran fsck on the ext4 partition and ntfsfix on the 2 NTFS partitions, both not finding any errors at all. And Grub is intact and have also tried a reinstall of it. So at the moment I'm currently stuck using a LiveUSB, and would like to see if there are any other options other than reinstalling. Thanks. Update I've now ran chkdsk using my Windows recovery disk, and it found errors and fixed them, but I am still unable to boot into either Windows or Ubuntu Update #2 I've decided to just re-install Ubuntu and start again as I didn't really want to spend any more time looking around whilst I need this computer for work. Thanks for all your help though.

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  • Can't boot without Flash Drive plugged in

    - by vlad
    (Sorry for my bad English) I had Ubuntu 12.04 Beta installed on my computer. When 12.04 was finally released, I made a bootable USB Flash Drive using Startup Disk Creator. Then I decided to check if this drive works properly and to reinstall the system on my desktop. I must add, my desktop behaves a bit strange when it comes to bootable USB's, it recognizes them as HDD. In BIOS I changed priority of boot so USB Flash Drive (recognized as HDD) was first. Successfully booted, I installed Ubuntu. Everything worked fine, but... Now I cannot boot from my real HDD. Every time I want to boot, I put the USB Flash Drive into my computer, boot, safely remove it and everything works. What have I to do, to repair boot? Thank you for your time!

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  • CD/DVD drive not mounted when inserted with Disc of any kind

    - by Cisco Sán
    I just noticed that if a insert a CD or a DVD of any kind, the Drive will start spinning but it will not show the mounted disc. Before it used to ask me what to do with the media inserted. Now it doesn't even do that. I ran in the terminal this code: eject -n and it displays this: " eject: device is `/dev/sr0'" what can I do to get the functionality back on my drive. also ran this command: sudo mount -o ro,unhide,uid=1000 /dev/cdrom /mnt/cdrom but in return i get this: " mount: mount point /mnt/cdrom does not exist" Running Ubuntu 11.10 HERE IS THE HISTORY UNTIL NOW thanks Waltinator: I ran the 'dmesg' but don't know what I'm looking for. Im a newbie on this. The same thing with the 'ls -rlt /var/log' command. Should I create the directory for the mount? at this point really don't know what to do. – Cisco Sán 7 hours ago Here are 3 lines from my dmesg after I successfully inserted a CD: [ 4804.416018] wlan0: no IPv6 routers present [ 8214.125450] ISdit ISO 9660 Extensions: Microsoft Joliet Level 3 [ 8214.136556] ISO 9660 Extensions: RRIP_1991A The first line is a previous event, my wireless going online. The next 2 lines are a good result. The number in square brackets is "seconds since boot", the rest of the line is usually helpful. And no, you should NOT create the mount point. Let's try to get the automatic mounting to work. – waltinator 7 hours ago ok this are my last 3 lines on the 'dmesg' [ 18.130819] init: plymouth-stop pre-start process (1396) terminated with status 1 [ 28.780011] wlan0: no IPv6 routers present [ 505.632119] CE: hpet increased min_delta_ns to 20113 nsec – Cisco Sán 6 hours ago It looks like your CD/DVD drive is not connected to the data bus, and not causing an interrupt when you insert a platter. – waltinator 6 hours ago Try dmesg | grep -A8 CD-ROM which should show you what the system thought was available when it came up. – waltinator 6 hours ago here is my printout [0.774351] scsi 0:0:0:0: CD-ROM HL-DT-ST DVD+-RW GSA-T40N A100 PQ: 0 ANSI: 5 [0.778117] sr0: scsi3-mmc drive: 24x/24x writer dvd-ram cd/rw xa/form2 cdda tray [0.778122] cdrom: Uniform CD-ROM driver Revision: 3.20 [0.778282] sr 0:0:0:0: Attached scsi CD-ROM sr0 [0.778340] sr 0:0:0:0: Attached scsi generic sg0 type 5 [0.780416] Freeing unused kernel memory: 984k freed [0.780732] Write protecting the kernel read-only data: 10240k [0.780986] Freeing unused kernel memory: 20k freed [0.786331] Freeing unused kernel memory: 1400k freed [0.804912] udevd[90]: starting version 173 [0.874178] r8169 Gigabit Ethernet driver 2.3LK-NAPI loaded [0.874208] r8169 0000:02:00.0: PCI INT A - GSI 16 (level, low) - IRQ 16 OK, your system sees the drive. Can you open and close the tray with eject and eject -t? Run udevadm monitor while you insert a CD (type ^C when done) and see if you get "change" and "add" messages. – waltinator 6 hours ago ok, "eject" works perfectly "eject -t" does nothing. this is the message for "udevadm monitor": KERNEL[13771.009267] change /devices/pci0000:00/0000:00:1f.1/host0/target0:0:0/0:0:0:0/block/sr0 (block) UDEV [13773.878887] change /devices/pci0000:00/0000:00:1f.1/host0/target0:0:0/0:0:0 /block/sr0 (block) – Cisco Sán 6 hours ago sudo hwinfo --cdrom (the hwinfo package is installable through Software Center) describes my CD-ROM, try it. – waltinator 4 hours ago My read out from the "sudo hwinfo --cdrom" are the following: hal.1: read hal dataprocess 2753: arguments to dbus_move_error() were incorrect, assertion "(dest) == NULL || !dbus_error_is_set ((dest))" failed in file ../../dbus/dbus-errors.c line 280. This is normally a bug in some application using the D-Bus library. libhal.c 3483 : Error unsubscribing to signals, error=The name org.freedesktop.Hal was not provided by any .service files 22: SCSI 00.0: 10602 CD-ROM (DVD) [Created at block.247] Unique ID: KD9E.JgkxTS4hgl2 Parent ID: 3p2J.gdUMCD83e+E SysFS ID: /class/block/sr0 SysFS BusID: 0:0:0:0 SysFS Device Link: /devices/pci0000:00/0000:00:1f.1/host0/target0:0:0/0:0:0:0 Hardware Class: cdrom Model: "HL-DT-ST DVD+-RW GSA-T40N" Vendor: "HL-DT-ST" Device: "DVD+-RW GSA-T40N" Revision: "A100" Driver: "ata_piix", "sr" Driver Modules: "ata_piix" Device File: /dev/sr0 (/dev/sg0) Device Files: /dev/sr0, /dev/scd0, /dev/disk/by-id/ata-HL-DT-ST_DVD+_-RW_GSA-T40N_K048BJ74257, /dev/disk/by-path/pci-0000:00:1f.1-scsi-0:0:0:0, /dev/cdrom, /dev/cdrw, /dev/dvd, /dev/dvdrw Device Number: block 11:0 (char 21:0) Features: DVD Config Status: cfg=new, avail=yes, need=no, active=unknown Attached to: #17 (IDE interface) Drive Speed: 31 Volume ID: "Movie" Publisher: "INTERVIDEO" Creation date: "20050424162207000" Thanks for the help. To Castro, hope this is what you meant and sorry for the comments..

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  • How to create an auto-grader in and for Python

    - by recluze
    I'm trying to create an auto-grader for one of my beginning programming courses for python. From my online search, I've come to know that it is effectively a unit test framework that tests the student's code rather than production code but I'm not really sure how to structure the flow of the program. Can anyone please provide a strategy for submission of code by students and automating the whole process of marking? For instance, how would the student code be submitted and then stored/structured on disk, how would the grades be stored/reported? I'm only looking for a broad strategy and will try on my own to fill in the blanks. (I asked this on stockoverflow.com initially but it's considered as off-topic and I was suggested to ask here.)

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  • Initramfs error during boot

    - by PoohJuice
    Boot from (hd0,0) ext3 238ac8ca-9576-443d-8e23-8dd836cd2683 Starting up ... mount: mounting /dev/disk/by-uuid/238ac8ca-9576-443d-8e23-8dd836cd2683 on /root failed: Invalid argument mount: mounting /dev on /root/dev failed: No such file or directory mount: mounting /sys on /root/sys failed: No such file or directory mount: mounting /proc on /root/proc failed: No such file or directory Target filesystem doesn't have requested /sbin/init. No init found. Try passing init= bootarg. BusyBox v1.15.3 (Ubuntu 1:1.15.3-1ubuntu5) built in shell (ash) Enter 'help' for a list of built-in commands.

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  • How to use Btrfs with compression on external USB hard drive?

    - by Andre
    I would like to make use of Btrfs' transparent compression on an external drive. Which tool is best for formatting the drive? Disk Utility or GParted? How do I activate the compression? During formatting or when I mount the drive? I guess at mount time. I'm using usbmount to automatically mount newly attached devices, because nobody is logged in on the desktop. Would I have to set general default options somewhere in a system configuration file to get Btrfs mounted with compression, or would I specify this via FS_MOUNTOPTIONS in /etc/usbmount/usbmount.conf and how? Thanks!

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  • Kindle Paperwhite Jailbroken; Ready for Custom Screensavers

    - by Jason Fitzpatrick
    If you’re already longing for some custom screensavers on your new Kindle Paperwhite, you’re in luck. The new Kindle has been jailbroken, opening it up to all sorts of custom hacks and modifications. For extra guidance on what to do once you’ve jailbroken, check out our guide to adding the screensaver hack and creating/adding screensaver images–make sure to grab the updated screensaver hack while you’re at it. Kindle 5.1.x Jailbreak [via Hack A Day] 7 Ways To Free Up Hard Disk Space On Windows HTG Explains: How System Restore Works in Windows HTG Explains: How Antivirus Software Works

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  • What You Said: How You Monitor Your Computer

    - by Jason Fitzpatrick
    Earlier this week we asked you to share your computer monitoring tips and tricks, now we’re back to share the wealth. Read on to see how your fellow reader monitor their gear. One of the more popular monitoring tools, thanks in part to the amount of things beyond just hardware it can monitor, in the comments was Rainmeter. Lee writes: I don’t really monitor my computer constantly, only when something is hanging up and I need to see what’s causing it. That being said, I do have Rainmeter so I can quickly see how much RAM or CPU is being used. For anything more detailed, I just go into the task manager and sort by RAM or CPU. Shinigamibob uses a wider range of tools to get a more in-depth look at difference aspects of his computer: 7 Ways To Free Up Hard Disk Space On Windows HTG Explains: How System Restore Works in Windows HTG Explains: How Antivirus Software Works

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  • Together at Last

    - by [email protected]
    OpenWorld, JavaOne, and Oracle Develop Get ready to converge on the ultimate IT convergence. Join us September 19-23 in San Francisco to attend Oracle OpenWorld, JavaOne, and Oracle Develop. With our new and complete technology stack apps-to-disk approach, there's something here for everyone. For all the nitty-gritty details, check out this recent article from Oracle Magazine. Better yet, reserve your place now on our registration page. We'll turn your visit to the city of the Golden Gate into a golden opportunity for your enterprise.

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  • Ubuntu Server 12 HD full

    - by julio
    I have a server with Ubuntu Server 12, today it stops some services and I found some comments about full disk, so I made a df -h S.files Size Used Disp Use% /dev/mapper/ubuntu-root 455G 434G 0 100% / udev 1,7G 4,0K 1,7G 1% /dev tmpfs 689M 4,2M 685M 1% /run none 5,0M 0 5,0M 0% /run/lock none 1,7G 0 1,7G 0% /run/shm /dev/sda1 228M 51M 166M 24% /boot overflow 1,0M 0 1,0M 0% /tmp Then I tried to delete some files but I made it from a windows remote computer just right clic and "delete" option on files, but HD still full. Is in Ubuntu Server any Trash file or what could be happeing?

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  • Why did Ubuntu and Windows start hanging mysteriously after I took a vacation?

    - by Ashrey Goel
    I installed Ubuntu alongside my Windows 7, after partitioning my HDD using Easeus partitioning manager. It was working perfectly, no problems, no data lost or corruption. Then I went away for 2 days and in my absence I don't know what happened in that period, now both Windows 7 and Ubuntu keep hanging continuously, like when you paint and change a brush it'll hang, I mean on very simple commands and I know my computer does not hang on such petty things. I use it for developing music and the specification are: Model: DELL-XPS Processor: Intel i5, 2.53 GHz RAM/Memory: 4GB Hard disk size: 500GB HDD Windows 7 partition: 417 GB Ubuntu Partition: 50 GB Please Help.

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