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• How to retrieve data from a corrupted volume

  - by explorex

  Hi, My Ubuntu 10.10 just crashed, probably due to hardware error (and in the end I was getting errors like Unknown filesystem ..... grub> .., and it went to the GRUB console before I could take any other action). I reinstalled the same version from a USB stick. I had Ubuntu installed with the ext4 file system and I also have the same filesystem in the same hard disk on a different drive. When I try to access my previous filesystem, I get errors: 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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• How to remove Ubunto from boot screen?

  - by Alaa M.

  I tried to install Ubuntu 14.04 on my Windows 8, and in the installation wizard I chose "Help me boot from CD". Now I have something like this when I restart the computer: http://i.stack.imgur.com/HxDQr.png If I click Ubuntu I get an error about a missing file (wubildr.mbr). I found a solution here. But that's not my concern now. I don't know if that means I have Ubuntu installed on my computer now or not, but I wanna delete it from the boot screen. I figured that I need to delete its partition, so I went to Disk Management and found the following: http://i.stack.imgur.com/W0oP4.png My question is: which one should I delete?

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• Deleted entire harddisk. Now my laptop won't boot anything and stuck at grub rescue!

  - by Jahan

  My laptop is Dell Inspiron N4030. I used to use Ubuntu 12.04 and it was on the entire hard drive. I tried to install windows 7 but my laptop couldn't install it. So, I decided to delete the entire hard drive and do a fresh install of Windows 7. But after deletion I immediately removed the gparted live usb which I was using to delete the partitions of my hard drive. And then tried booting from windows 7 cd, didn't work, tried ubuntu live cd, didn't work, tried hiren's boot cd, didn't work, tried super grub disk, didn't work. Probably I'm not doing it right. Help needed badly.

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• How to get rid of 'grub rescue'?

  - by SaM

  While logged into Windows, I deleted a disk partition which was containing Ubuntu. When I restarted my pc, it is showing 'grub rescue' command prompt. How to boot windows now? I no longer require Ubuntu. I have Ubuntu live CD When I tried the following commend: sudo apt-get install lilo the following error is shown: Err http://archive.ubuntu.com/ubuntu/ natty/main lilo i386 1:22.8-10ubuntu1 404 Not Found [IP: 91.189.92.156 80] Failed to fetch http://archive.ubuntu.com/ubuntu/pool/main/l/lilo/lilo_22.8-10ubuntu1_i386.deb 404 Not Found [IP: 91.189.92.156 80] E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?

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• Uninstalling Ubuntu dual-boot bootrec issues

  - by Raymond Standen

  So on my laptop I am currently planning on uninstalling Ubuntu 12.04 so I can upgrade my Windows 7 partition to Windows 8, then install Ubuntu 12.10. My issue being that when I boot the Windows 7 recovery disk, I believe i Need to use cmd to run bootrec /fixboot and bootrec /fixmbr. Now, whilst fixmbr works, fixboot yields me with an error regarding an unrecognised volume. When I turn on my PC now, I am no longer met the GRUB option, so I boot straight into Windows. My question is: As such, do I still need to have fixboot run or can I just format and resize the partitions now even with the error when running fixboot?

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• How to convert an XFS file system to HFS+

  - by user219350

  I have repeatedly convinced of the reliability of the XFS file system , and I was more than satisfied . I was happy with everything in Ubuntu 14.04 ( great software) , but there is a little "but ! " Basically, I work on OSX-Mavericks 10.9.3, which sees very Windows 8.1 and works wonders with NTFS, but does not see Ubuntu! Briefly describe the equipment: ASRock B75 Pro3-M i5 3330 GeForce GTX 650 Ti SATA 500GB running OS X Mavericks + Clover - a boot disk Toshiba 2TB running Windows 8.1 (x64) and Ubuntu 14.04 (amd64) If you boot from the Toshiba (where there is Ubuntu and boot Windows + GRUB) after restart boot from Clover, it is impossible. Tried a lot of options - as Clover installation and boot priority, and various settings for GRUB, but have not found an acceptable option and have no desire to reinstall again Clover (Mavericks reboots 20 seconds - excellent!) So please help on the file system - how to convert from XFS to HFS+ journaled. Mavericks to saw it all synced on Mac. Thank you for the sensible answer and help! Originally in Russian.

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• What Happens When You Load a Web Page? [Video]

  - by Jason Fitzpatrick

  When you type in a URL and the web page loads, everything seems so simple. Peel back the layers, however, and you see a complex delivery system built around data packets. Watch this informative video to see how your web requests actually work. Courtesy of The World Science Festival, we find this well put together video demonstrating how a trans-Atlantic web page request works. [via Boing Boing] 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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• Can't install Ubuntu in a HP DV6 Laptop

  - by EApubs

  I just bought an HP DV6 6011tx (link) Laptop... I formated the disk through Windows and prepared for installing Ubuntu... When I insert the live CD, it shows the ubuntu start screen and then everything goes black (no cursor... Just like the screen is switched off (but the system is working)) When i try to install from the USB, it says Live media is not found! Some times it also give a black screen like the CD... Have any idea how to fix this? Thanks

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• Install/upgrade ubuntu from another system

  - by Samarth Agarwal

  I have a new Laptop with latest Ubuntu preinstalled on it, its 12.04. I have another laptop with Ubuntu 10.04 on it. What I lack is a fast internet connection. I want to upgrade my Ubuntu 10 laptop to a ubuntu 12 version. How is this possible without using internet connection? Can I move/copy the installation from the new laptop to the older one? Is there a way so that the newer laptop can upgrade the older one using a usb disk or dvd/cd?

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• Unable to mount /dev/loop0 during install

  - by AJP

  I was installing 32-bit Ubuntu(ubuntu-10.10-desktop-i386.iso) on VMWare workstation 7.1. During installation an error came up with the following text. (initramfs) mount: mounting dev/loop0 on //filesystem.squashfs failed: Input/Output error Can not mount /dev/loop0 (/cdrom/casper/filesystem.squashfs) on //filesystem.squashfs I did a memory test which was successful, but when selecting "Try Ubuntu without installing", "Install Ubuntu" or "Check disk for defects" the same error is showing up. I download the ISO image from Ubuntu website "http://www.ubuntu.com/desktop/get-ubuntu/download". As I couldn't find the checksum data, the ISO image was verified by mounting to a virtual drive and browsing the contents. The ISO image is mounted to a virtual drive in VMWare and not burnt to a CD.

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• Copy a Ubuntu install?

  - by Hailwood

  So short story is that I am wanting to grab my ubuntu install, back up to an external disk, delete everything from my hdd, repartition my hdd, put my ubuntu install back. Long story is. I finally got my recovery discs, so I do not need to recovery partitions, not the mention my hdd is kinda messy, So I am going to wipe it and put everything back. Thing is I don't want to have to re-install everything, I would rather just copy/paste my ubuntu install if possible. Oh, What I should also mention is that I will be dual booting windows!

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• Swap on Ubuntu: No primary partition

  - by 3l4ng

  I am running Ubuntu 13.10 64bit on a system with 4GB RAM, dual booting with Windows Most people say that it is good to have swap on a system, and results in speed, so I used it with my previous Ubuntu installations. In my new HDD, I use 3 primary partitions: 1 for Windows OS, 1 for Ubuntu and 1 for data. The windows system also took up one primary partition for system, and I have only 4 MBR slots. Effectively I have no primary partition for SWAP. I do not know it happened earlier, but back then I had a partition for swap as well My CURRENT disk partitioning looks like this: http://imgur.com/YMTr879 How can I create swap in my current setup?

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• How to capture the screen in DirectX 9 to a raw bitmap in memory without using D3DXSaveSurfaceToFile

  - by cloudraven

  I know that in OpenGL I can do something like this glReadBuffer( GL_FRONT ); glReadPixels( 0, 0, _width, _height, GL_RGB, GL_UNSIGNED_BYTE, _buffer ); And its pretty fast, I get the raw bitmap in _buffer. When I try to do this in DirectX. Assuming that I have a D3DDevice object I can do something like this if (SUCCEEDED(D3DDevice->GetBackBuffer(0, 0, D3DBACKBUFFER_TYPE_MONO, &pBackbuffer))) { HResult hr = D3DXSaveSurfaceToFileA(filename, D3DXIFF_BMP, pBackbuffer, NULL, NULL); But D3DXSaveSurfaceToFile is pretty slow, and I don't need to write the capture to disk anyway, so I was wondering if there was a faster way to do this

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• Is it possible to create a virtual drive and share via USB?

  - by Matthew

  My question is kind of hard to follow, but I'm asking if it's possible to make a virtual flash drive and sync it to another device with a USB to USB cable? To make things more clear, think of a typical flash drive. You connect it to a laptop and it shows up as a removable disk. Is it possible to make a computer a host of a "Virtual Drive" that would be connected to a USB cord on one end, and the other end connecting to another device such as a Xbox 360, or another computer.

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• Trouble with 12.10 lag

  - by Brennan

  Well basicly lately I have been having lag problems with 12.10. I will post my specs, but before the update to 12.10, it said that I had intel graphics. Now it says I have Gallium. My specs: *Memory: 3.9 GiB *Processor: Pentium(R) Dual-Core CPU E5500 @ 2.80GHz × 2 *Graphics: Gallium 0.4 on llvmpipe (LLVM 3.2, 128 bits) (used to say intel graphics) *OS Type: 32-bit *Disk: 486.1 GB The output of the command sudo apt-cache check is this: E: Invalid operation check The output of the command sudo lspci -nnk | grep -A5 VGA is this: 00:02.0 VGA compatible controller [0300]: Intel Corporation 4 Series Chipset Integrated Graphics Controller [8086:2e32] (rev 03) Subsystem: ASUSTeK Computer Inc. Device [1043:836d] Kernel driver in use: i915 00:1b.0 Audio device [0403]: Intel Corporation NM10/ICH7 Family High Definition Audio Controller [8086:27d8] (rev 01) Subsystem: ASUSTeK Computer Inc. Device [1043:8445] Kernel driver in use: snd_hda_intel

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• How To Get a Better Wireless Signal and Reduce Wireless Network Interference

  - by Chris Hoffman

  Like all sufficiently advanced technologies, Wi-Fi can feel like magic. But Wi-Fi isn’t magic – it’s radio waves. A variety of things can interfere with these radio waves, making your wireless connection weaker and more unreliable. The main keys to improving your wireless network’s signal are positioning your router properly — taking obstructions into account — and reducing interference from other wireless networks and household appliances. Image Credit: John Taylor on Flickr How To Get a Better Wireless Signal and Reduce Wireless Network Interference How To Troubleshoot Internet Connection Problems 7 Ways To Free Up Hard Disk Space On Windows

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• How much configurability to give to users regarding concurrency?

  - by rwong

  This question is a narrowing-down of these related questions: How much effort should we spend to programming for multiple cores? Concurrency: How do you approach the design and debug the implementation? Given that each user's computers may have different performance characteristics with respect to calculations, memory, disk I/O bandwidth and network I/O bandwidth, and that it is difficult to implement an automated self-tuning system in your software, how much configurability should we give to the end-users so that they can find ways (by trial-and-error?) to improve our software's efficiency? If we give users the ability to change these settings, how do we give visual feedback to users so they can measure the performance changes?

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• Unable to install 11.10 to new OCZ Agility 3 SSD

  - by Masi

  I know the discussion here where they are not getting the same error as I. I use Lenovo Thinkpad X60. The default partition table: sd1 ext4 53.91GB, sd2 extended 1.99GB and sd5 swap 1.99GB. I get Input/output error during read on /dev/sda when trying to install from LiveCD -mode and when trying to install directly. I get the error normally at the stage of choosing time zone or very last at choosing the keyboard layout. Then there is the box with buttons: back, ignore and continue. Neither of them put the process forward so I need to cancel it. How can you install Ubuntu to SDD disk?

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• Can't install Ubuntu in a HP DV6 Laptop

  - by EApubs

  I just bought an HP DV6 6011tx (link) Laptop... I formated the disk through Windows and prepared for installing Ubuntu... When I insert the live CD, it shows the ubuntu start screen and then everything goes black (no cursor... Just like the screen is switched off (but the system is working)) When i try to install from the USB, it says Live media is not found! Some times it also give a black screen like the CD... Have any idea how to fix this? Thanks

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• How to See Which Group Policies are Applied to Your PC and User Account

  - by Taylor Gibb

  We have shown you a lot of tips and tricks here at How-To Geek that require the modification of  a Group Policy Object. Over time you may have wondered which Group Policy settings you have edited–so here’s how to figure that out. Note: This will work on Windows 7 Professional and higher, as well as the Windows 8 Release Preview. 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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• Windows 7/Ubuntu 12 dual boot deleted for Windows 8 installation. How to make grub rescue go away?

  - by dimious

  I had a Windows 7/Ubuntu 12 dual boot and I decided to clean install Windows 8 over them. The problem is that after I deleted all partitions and installed windows I was getting an "Operation system not found", however after an "enter" the system will normally boot into Windows 8. I realized that Windows did their trick and put the system (not partition anymore?!?) "tag" (Disk Management) on my media hard drive. After trying to fix the boot/mbr to be able to boot from my main drive the "Operation system not found" changed to the "grub rescue" prompt. I know that I cannot use that because I have killed the grub files. Windows can still boot as long as I choose to boot from the media drive. The question is, is there any way to move the "system", whatever it is now, to the main drive and have the PC boot from there, while making grub disappear? And if that is possible after that, can I just make the Media drive inactive or I will have to somehow remove the "system" tag?

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• Quantal analyzes the HD in any boot

  - by Lucio

  I have installed Ubuntu 12.10 formating the HDD. Any time that I turn on the PC and boot Ubuntu, it always analyzes my HDD in search for bad blocks. This is what happens: When I turn on the PC and load Ubuntu, before I can login my user, appears the following image. If I press C, the process ends and I can work, if I wait until the process can finish by itself also I can work. Also I had this problem, related to the HDD. My Hard Disk Driver is a Western Digital. Is there any problem on the system? Can I stop this procedure? Information that can help: tune2fs -l output

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• Trying to update Asus BIOS: FreeDOS crashes

  - by ZekeDroid

  My UX31 zenbook is experiencing some weird shutdown behavior when the battery drops below 50% and the internet seems to agree that updating the BIOS is a good step forward since there were issue with the kernel before. I downloaded both the correct BIOS file and the windows 7 utility tool and now need to boot FreeDOS to run, however, I've tried every method out there and they all fail (or so I think): Using unetbootin's FreeDOS 1.0 image I get to an error saying it couldn't run drivers then I get to a command line on disk A:. I assumed a dead end. Using unetbootin but with the FreeDOS 1.1 version image downloaded directly: get an error of "bad or missing command interpreter". I looked online and the solutions didn't work either. So, is there an alternative to FreeDOS or to installing a BIOS that I could use?

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• Grub errors during UEFI dual boot for Windows 8 (can't find command 'drivemap')

  - by luca-mastro

  I have got a newly bought ASUS N56V with Windows 8 preinstalled. I needed to install Ubuntu so i partitioned the disk and after having disabled the Secure Boot option from Windows 8 i successfully installed Ubuntu 12.10 from a Live USB. The problem is that if i try to access both to Windows 8 (loader) and Windows Recovery System (loader) from the GRUB menu, these two errors show: can't find command 'drivemap' and invalid EFI file path and it goes back to the grub menu. In conclusion I do not have access to my Windows 8 partition but can only use Ubuntu. How can I solve the problem? I am pretty new to the matter. Thank you!

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• Split a partition with GParted

  - by Eray

  These are my current disk partitions. /yedek is for some personal backup files. As you can see there is only Ubuntu on my PC. I will install Windows, too. Because of this I want to shrink /dev/sda3 . It currently 546GB and I want to split it: 300GB for / and 246GB for Windows (NTFS) is OK for me. I'm using GParted for the first time. How can I shrink /? I don't want to lose any datas from Ubuntu.

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