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  • mounting external hard drive EXT4: "the unlocked device does not have a reckognizable filesystem on it"?

    - by user824924
    I'm having problems mounting ext4 partitions(inside a LUKS partition) in external drives. The drives are fine, there is no problem whatsoever with the drives and no filesystem corruption. This happened since a recent automatic system upgrade, and a manual upgrade to kernel 3.12.0. It goes like this: I plug in the external drive Passphrase is asked for luks device luks partition correctly unlocked/opened Instead of proceding with mounting the now exposed ext4 partition there's a pop-up saying: "the unlocked device does not have a recognizable filesystem on it". Same happens in this case: $ gvfs-mount -d /dev/sdc2 Enter a passphrase to unlock the volume The passphrase is needed to access encrypted data on WDC WD250... (250 GB Hard Disk). Password: Error mounting /dev/sdc2: The unlocked device does not have a recognizable file system on it Doing a manual sudo mount /dev/dm-1 /mnt/testfolder works with no errors and there is no problem with the filesystem (fscked). Also there doesn’t seem to be anything useful written to dmesg when this happens. What gives?

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  • How does apt-btrfs-snapshot work?

    - by Oli
    I read on the planet that apt-btrfs-snapshot would be available for Natty. The brief description of what it does sounds very nice: it will automatically create filesystem snapshot (of everything but /home) when apt installs/removes/upgrades. With the apt-btrfs-snapshot cli app its easy to list/remove/rollback the snapshots But before I convert my entire life to btrfs for the sole purpose of gaining a built-in backup system, can anybody tell me how btrfs's snapshots work. To my layman's brain, it sounds like this would eat a devastating amount of disk space if you're taking snapshots every time you install or upgrade something (I do this more than once a day). I assume the system is smarter than I'm allowing it but I really don't know. How do the snapshots work?

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  • What features of old computers helped you learn to be a better programmer?

    - by David Cary
    What features of old computers helped you learn to be a better programmer -- but don't seem to be available on new computers? I imagine that, while educational, you are really glad some features are gone, such as programs ran so slowly that I could almost see each pixel being plotted, so I got a visceral feel for the effect of various optimizations. I imagine other features you may be a little nostalgic for, such as I could turn on the computer, and write a short program that printed "Hello, World" on the printer, before ever "booting" a "disk". (I'm hoping that this is constructive enough to avoid the fate of the " What have we lost from computers 20 years ago ?" question).

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  • Ubuntu cannot boot

    - by Ibrahim Hammad
    I've Ubuntu 12.04 installed along with windows 7. After trying to update the Geforce driver on Ubuntu (already updated on windows), Ubuntu fails to boot. It will only give me a black screen and ask for log in user name and password and stays on the black screen. I've tried to fix it from a boot repair disk, which had generated a long report and then told me that Wubi.exe is not found. How can I retrieve my [revious installation, or fix it please? If not possible what is the best procedure to re install Ubuntu without affecting the partitions please. Regards,

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  • Ubuntu 12.04 LTS Realtek RTL8192E Problems

    - by Logan
    My wifi is not working. I have tried ndiswrapper with the XP driver but that still did not work. Please explain to me in layman's terms. I can run commands so if you tell me exactly what to put, i will put it. Basically, ubuntu is not showing a wireless networks option and when I ran some command yesterday it said the driver was UNCLAIMED. Please help. This is a wintec card with realtek rtl8192E chip on it. It is a desktop computer. On a 20gb partition, other 60gb is for windows(yeah its an old desktop). Use windows installer to install ubuntu(this is one of the dell desktops that wont boot ubuntu from disk). So any help is appreciated and I would like to get this done THIS weekend.

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  • Disable auto-mount for particular partitions on usb drives

    - by nealmcb
    I have a big USB disk with 3 partitions: one for backup and two other bootable ones for installing and testing new distros. I want the backup partition automounted on boot. But I don't want the two test partitions automounted. Despite my use of "noauto" in /etc/fstab, something (gnome?) seems to be mounting them when I plug the drive it. LABEL=mybook /srv/backup ext4 defaults 0 2 LABEL=mybook-root /media/mybook-root ext4 user,noauto 0 2 LABEL=mybook-spare /media/mybook-spare ext4 user,noauto 0 2 In previous Ubuntu distributions it seems that it was possible to configure gnome so it would avoid mounting particular partitions on removable drives like USB: gnome-mount --write-settings --mount-options noauto --device /dev/sda1 This is no longer available in Lucid (when did it go away?) Is there another way to do this now?

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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 can I find files quicker than find or locate?

    - by Chaitanya
    I have been using find command to find files on my 1 tb hard disk. it takes very long. then I used locate which proved to be faster with regular update using updatedb. But the limitation of locate is that I cannot find files with certain size or modified/created time. can you suggest me any ideas on how to find files at more speed or in that case how to pipe output of locate command in a way that all other information like size, time, etc. can be displayed or redirected to a file.

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  • How to fix an annoying ReSharper &ndash; NuGet error

    - by terje
    Originally posted on: http://geekswithblogs.net/terje/archive/2013/10/30/how-to-fix-an-annoying-resharper-ndash-nuget-error.aspxUsing NuGet in Visual Studio together with ReSharper may sometimes lead you into an annoying error where ReSharper indicates your code has an error, but the solution builds just fine. This may happen if you have a set of NuGet packages, and you either just restore them, or delete them on disk and then restore again.  Your code ends up looking like this, note the red missing functions, which comes from the Moq library - which is downloaded from NuGet:   while the Build is still fine, it compiles without any errors: This stackoverflow question gives some different approaches to solve this, but my experience have been that the Resharper Suspend-Resume trick most often solves the issue: In Visual Studio:  Go to Tools/Options/Resharper Press Suspend: When this is done the error markers disappear, since ReSharper now is inactive. Then just press Resume again: This has been submitted to Jetbrains support, ticket here: http://resharper-support.jetbrains.com/requests/3882) , if you want to follow it.

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  • programm and user data from an old hdd to a new installation on ssd

    - by hans wurst
    i tried everything since days, now i ask. i got a ubuntu system on my old hdd, wich is connectet via usb to this system and a sdd is build in my notebook. at the moment i am running a ubuntusystem from an usb stick. it have tried to clone my disk(cahnge uiid, etc), to transport the data via deja dup and much more. the result was nothing or strange things. my idea is to copy the important data form the old system to the new(home and whatever), but it is not allowed to do this. somebody her who know a tool wich can do this, or got an an other idea.

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  • phpbb users table entries deletion and its effects. what are all the clean up work before deleting an user

    - by Jayapal Chandran
    I am writing a window program which will run from the system tray. which will ping my phpbb board site to fetch new users registration information. So with the result i can check whether the user is spam user or not. if i feel it is a spam user then i will delete that entry from the users table. before deleting the users table what are all the other table that i should delete. so that there will not be any unlinked references which will then in due course of time gets numerous and waste of disk space. so i want to know what i should do before deleting an user so that all his other activities should be cleaned off before i deleting a user.

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  • About grub rescue command line

    - by khai
    Please help me.. I have two hard disk in my laptop..window 7 and ubuntu.. I have problem to back in option menu..because i enter one of the list of ubuntu.. In option menu,,have a list which operatg system i can choose between ubuntu n window7 but the list stil have another menu for ubuntu..i make mistake to choose the another list of ubuntu..and now i have to fix the command line that have grub rescue.. like this : error : no such partition grub rescue > i dont have any idea to fix this problem..i try the another step that i see at the other question but still dont have any answer..this problem is just i enter the another list but do not have any kernel,problem or somethg like that..

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  • ubuntu cant be installed as it says GPU lock

    - by piyush bhardwaj
    i have win 7 running on my system i just wanna move to ubuntu 12.10 desktop version 36 bit but when i try to install the CD gets loaded start screen comes but suddenly texts line appears and screen goes black the text are - [189.463934] [drm] [noveau] 0000:02:00.0: GPU LOCK- switching to software fbcon [194.248014] [drm] [noveau] 0000:02:00.0: failed to idle channel 1 [199.504009] [drm] [noveau] 0000:02:00.0: failed to idle channel 3 and it goes on.....like this iam new to the linux system so dnt know much abt it ..so if any body can help me to solve my prblm.. my laptop is of HCL and it has 3 gb ram or 350 gb hard disk with nvidia graphic card ..it has 2 ghz pentium dual core it was manufactured in 2009.. so if any body can help i would be greatful and can be able to join ubuntu..

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  • Netbook partitioning scheme suggestions

    - by David B
    I got a new Asus EEE PC 1015PEM with 2GB RAM and a 250GB HD. After playing with the netbook edition a little, I would like to install the desktop edition I'm used to. In addition to ubunto partition(s), I would like to have one separate partition for data (documents, music, etc.), so I could try other OSs in the future without losing the data. What partition scheme would you recommend? I usually like to let the installation do it by itself, but when I try to that I can only use the entire disk, so I don't get the desired data partition. I wish there was a way to see the recommended default partitioning scheme, then just tweak it a bit to fit your needs (instead of building one from scratch). So, how would you recommend I partition my HD? Please be specific since I never manually partitioned before. Thanks!

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  • How to recover data from NTFS partition that was made into a Swap partition?

    - by Raghav Mehta
    I have extremely important stuff on my windows partition which during the ubuntu 10.10 installation,when it said that I should create something called swap space, I selected it to be a swap space (without even knowing what it actually meant) The Grub2 doesn't show up so I don't get a choice to boot Ubuntu or Windows. I don't get my windows partition as a removable device in Ubuntu either. When I go to disk utility and select the sda2 (i.e.. my windows partition) and click edit partition and select HPFS/NTFS for the type and tick bootable and click OK the small processing sign keep on rotating on the bottom right of the sda2 in the chart and after about 10 to 15 minutes it gives an unknown error and thus, I am still unable to use my windows. I am even worse than a beginner who doesn't know a thing about Ubuntu so please be patient and help me out.

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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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  • Ubuntu not showing complete list of partitions while installing 10.04 and 10.10

    - by Ravi
    I am a total beginner to Ubuntu. I have tried to install Ubuntu on my 320 gb hard disk and am stuck at the partition page. The problem is, Ubuntu is not showing all the partitions. When I run the live CD and try to see all the drives these are not present. I have presently 4 drives, C: 58 GB D: 48 GB E: 87 GB and F: 102 GB. The F: drive is not shown; at the time of installing it does not show any of the drives, just a chunk of 257 GB, hence I am unable to install Ubuntu on my D: drive. On the C: drive, Windows 7 64 bit is installed.

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  • How to retrieve data from a corruped volume

    - by explorex
    Hi, My Ubuntu 10.10 just crashed(probably due to hardware error and in the end I was getting error like Unknown filesystem ..... grub> .. GRUB console before i could take some action) and i reinstalled the same version form USB stick. I had ubuntu installed in ext4 file system and I am also having the same filesystem in the same hard disk on different drive. When I try to access my previous filesystem, i get error Error mounting: mount: wrong fs type, bad option, bad superblock on /dev/sda6, missing codepage or helper program, or other error In some cases useful info is found in syslog - try dmesg | tail or so I had some important files in the previous volume, I don't know how to retrieve them. And what are the chances that I would get the same outcome (hardware error)? Please help me!

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  • Can you delete the Humanity icon theme safely?

    - by Alex
    I'm trying to reduce used space after running disk usage analyser, since I'm using a 40GB SSD. The icons use quite a bit of space! Could I delete those that I don't use, such as humanity? (I use Faenza-Dark) If it is possible, what would be the best way to this? as when I attempt to remove humanity in the Software Centre it says the software-centre itself must be removed. Similar problems arise with synaptic package manager. I was wary of just deleting the unused directories in usr/share/icons/. Thanks for the help!

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  • How can I get wireless working on an HP-Mini 110-3150?

    - by jfmessier
    I just got an HP Mini 110-3150, and booting from an external hard disk with Ubuntu 10.10 works all fine, except that there is no wireless detected. I noticed that the Wireless indicator is red under Ubuntu, but is enabled under whatever Windows 7 I got on it. So, I understand that it may not get detected at all by Ubuntu at startup time, and there is no manual switch that I can simply slide to turn on/off. How can I get the Wireless device turned ON by default at startup time, and is there any special driver I need to install (proprietary or not) to get it working ? Merci :-) Update: When actually installing on the computer, as a new install, the NIC is not detected at first, but upon restarting, I get a notification of a closed driver available for the wireless. Once installed, updated and restarted, it works fine.

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  • Finding files at more speed

    - by Chaitanya
    I have been using find command to find files on my 1 tb hard disk. it takes very long. then I used locate which proved to be faster with regular update using updatedb. But the limitation of locate is that I cannot find files with certain size or modified/created time. can you suggest me any ideas on how to find files at more speed or in that case how to pipe output of locate command in a way that all other information like size, time, etc. can be displayed or redirected to a file.

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  • USB-live does not save files between sessions

    - by Mads Skjern
    I created a USB-stick with Ubuntu, using the recommended tool "Startup Disk Creator" and the image for Ubuntu 13.10. The very simple interface looks like this: There can't be much to misunderstand in this GUI. I have chosen to create a USB stick with a live version of Ubuntu, which will save files and settings from session to session, on the USB drive, right? Well, it just doesn't save anything. I go in, create a file on Desktop, restart and it's gone. I did the whole procedure three times, i.e. first creating the USB, then testing if I could save. Have I misunderstood something?

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  • Is it safe to run upgrade with Pinned Applications in Synaptic

    - by BlueXrider
    I have firefox, thunderbird, thunderbird-locale-en, thunderbird-locale-en-us, xul-ext-calendar-timezones, xul-ext-gdata-provider and xul-ext-lightning pinned in Synaptic. When I run apt-get upgrade. I get the following The following packages will be upgraded: boot-repair boot-sav darktable firefox libvlc5 libvlccore5 thunderbird thunderbird-locale-en thunderbird-locale-en-us vlc vlc-data vlc-nox vlc-plugin-notify vlc-plugin-pulse xul-ext-calendar-timezones xul-ext-gdata-provider xul-ext-lightning 17 upgraded, 0 newly installed, 0 to remove and 0 not upgraded. Need to get 53.0 MB of archives. After this operation, 606 kB of additional disk space will be used. Do you want to continue [Y/n]? Are these packages really going to be upgraded?

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  • Drawing of a huge model - How to regain performance?

    - by marc wellman
    I have a huge model I want to draw in my XNA application but because of its size I am experiencing a tremendous loss of performance. The model has about ~50 000 000 edges and has a size on disk of 205 MB in DirectX Format. Please don't ask whether this model has to be that big - yes it has! Is there a way to transfer the model directly to my GPU in order to let the GPU do the drawing like when transferring a VertexBuffer like this: graphicsDevice.Vertices[1].SetSource(_instanceBuffers[i], 0, _sizeofMatrix); because when I try to fill a vertexBuffer with all the vertices I am getting a OutOfMemoryException.

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  • Build Your Own Adapter For Cheap Mains Power on Portable Devices

    - by Jason Fitzpatrick
    If you’re looking for a way to build a battery-to-wall-power adapter for one of your portable devices, this tutorial can serve as a template for your DIY adventures. Mike Worth wanted an outlet adapter for his Canon camera, but Canon wanted $75 for it. Not looking to spend that kind of cash on a very simple adapter, he set out to build his own. The build is quite simple, consisting of a transformer with the proper voltage, and a set of dummy battery casings with thumb tacks and washers to serve as the negative and positive leads. Hit up the link below to see the full build. Making a Mains Adapter [via Hack A Day] HTG Explains: What Is RSS and How Can I Benefit From Using It? HTG Explains: Why You Only Have to Wipe a Disk Once to Erase It HTG Explains: Learn How Websites Are Tracking You Online

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