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• "Unable to install GRUB in /dev/sda" when installing GRUB

  - by vicban3d

  I recently bought a shiny new Lenovo Yoga 2 Pro and I want to dual boot it with Ubuntu for studying purposes. Its built-in OS is Windows 8.1 and it has a 256GB SSD. I've made a separate 90GB partition just for Ubuntu and a live USB to install it. The first time everything seemed to work great, I solved the wifi issued by blacklisting ideapad_laptop, the installation went flawlessly and Ubuntu worked fine. When I got up the next morning and turned on my laptop it booted into Windows right away without ever showing the GRUB menu. So I tried to reset, and checked my partitions with the Disk Manager and everything looked fine. Since I couldn't find a solution online I went ahead and formatted the partition to try and install again. This time and every time since, the installation was aborted and I got a fatal error saying: Unable to install GRUB in /dev/sda Executing `grub-install /dev/sda` failed. This is a fatal error. Can anyone please suggest a solution to this problem? If any further information is needed I would be happy to provide it. Thanks. When installing I get the following in details: ubuntu kernel: [ 1946.372741] FAT-fs (sda2): error, fat_get_cluster: invalid cluster chain (i_pos 0). ubuntu grub-installer: error: Running 'grub-install --force failed.

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• Understanding Application binary interface (ABI)

  - by Tim

  I am trying to understand the concept of Application binary interface (ABI). From The Linux Kernel Primer: An ABI is a set of conventions that allows a linker to combine separately compiled modules into one unit without recompilation, such as calling conventions, machine interface, and operating-system interface. Among other things, an ABI defines the binary interface between these units. ... The benefits of conforming to an ABI are that it allows linking object files compiled by different compilers. From Wikipedia: an application binary interface (ABI) describes the low-level interface between an application (or any type of) program and the operating system or another application. ABIs cover details such as data type, size, and alignment; the calling convention, which controls how functions' arguments are passed and return values retrieved; the system call numbers and how an application should make system calls to the operating system; and in the case of a complete operating system ABI, the binary format of object files, program libraries and so on. I was wondering whether ABI depends on both the instruction set and the OS. Are the two all that ABI depends on? What kinds of role does ABI play in different stages of compilation: preprocessing, conversion of code from C to Assembly, conversion of code from Assembly to Machine code, and linking? From the first quote above, it seems to me that ABI is needed for only linking stage, not the other stages. Is it correct? When is ABI needed to be considered? Is ABI needed to be considered during programming in C, Assembly or other languages? If yes, how are ABI and API different? Or is it only for linker or compiler? Is ABI specified for/in machine code, Assembly language, and/or of C?

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• How to remove leading whitespace from file and folder names?

  - by timoto

  How to remove leading whitespace from file and folder names? (I'm running OS X 10.6 Snow Leopard.) As provided below by @Lri I was able to remove trailing whitespace using this: #!/bin/bash IFS=$'\n' for d in {1..9}; do find ~/Desktop -name '* ' -depth $d | while read f; do mv "$f" "$(sed 's/ *$//' <<< "$f")" done done Now I'm trying to remove leading whitespace with this: #!/bin/bash IFS=$'\n' for d in {1..9}; do find ~/Desktop -name '* ' -depth $d | while read f; do mv "$f" "$(sed 's/^ *//;s/ *$//' <<< "$f")" done done but it doesn't work. What am I doing wrong?

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• ProStar gaming laptop, which had Ubuntu 10.10, won't boot past Grub. Thoughts?

  - by Richard Zak

  At work we have some high-end gaming laptops we use for their dual GPUs. The machines have second generation i7 CPUs, and came with Windows 7. On most of them I installed Ubuntu 10.10, and all was fine. There were two laptops that I wanted to repurpose and wanted to reinstall the OS. It boots the CD (burned Ubuntu installation CD, I've tried 10.10, 11.10, and 12.04, as well as CentOS 6), and when Grub tried to boot the kernel, I just get a cursor blinking in the upper left corner of the screen. I tried the disabling of ACPI and the other items in the advanced menu, but nothing works. I could still boot to the current Linux installation though. I was able to install Windows 7 again, and use WUBI, but I think that works because it uses the Windows bootloader and not Grub. How could it have worked before and not now? I have confirmed that the CD is fine, as are the hard drive and CD drive. I also had the same problem with Debian, and had to boot through Windows 7 to install it.

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• Cannot boot from Yumi multiboot USB stick

  - by Amator

  I've just created a multiboot USB stick using Yumi. I tried to start my notebook (Asus K70IO) using it, but all I see is just a black screen with blinking underscore even after waiting for minutes. If during this time I remove the USB stick I get the message: "Operating system load error". How do I properly load my Yumi USB stick and use it? I've tried formatting it using Yumi's checkbox to format the stick in FAT32 too, but it didn't help. Now I tried to use Sardu 2.0.5 and met same problem: black screen and blinkin underscore, if I remove stick I see "Operating system load error" and my OS starts to boot. At the same time if I create bootable USB stick from ISO using UltraISO it boots smoothly.

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• Why am I seeing excessive disk activity when installing applications?

  - by Kev

  I'm running Windows 7 Ultimate 64 bit on a Dell Vostro 1720 with 8GB of RAM, 7200RPM Disk, 2.53 GHz Core2Duo (Windows 7 64 bit is a supported option and the laptop came with the OS pre-installed). I'm noticing some fairly excessive disk activity when running installers. For example the Visual Studio 2010 RC installer constantly accessed the disk for ~10 minutes. It was so excessive that I was unable to use the machine until this ceased. Today I installed Trillian Astra 4.1 for Windows (latest build from the website). Again when I ran the installer I was pretty much locked out of the machine until the disk activity calmed down. In both cases when I eventually managed to launch task manager I could see that the CPU was sitting at around 5% to 7% utilisation whilst this was going on. All other disk related activity is fine, the machine is snappy and applications launch without delay. It's just when I run an installer I see this odd behaviour. Why would this be?

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• Is it possible to run an Automator workflow when a USB device is connected?

  - by pkaeding

  I would like to run an Automator workflow every time I connect a certain thumbdrive to my OS X Snow Leopard system. This workflow will copy certain files from my hard drive onto the thumb drive. I have the workflow part figured out, but I don't know how to trigger it. Ideally, I wouldn't need to do anything; it would run as soon as the drive is mounted. Is this possible? Am I approaching this from the wrong angle? The solution only really needs to work on Snow Leopard. Thanks!

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• What "file system" is supported by Windows and Linux?

  - by Skiroid

  I'm setting up a media centre for my living room so that I'm able to watch downloaded films and TV shows on the big screen. The media centre is an old small computer which will have XBMCbuntu 12 installed on it. Right now, the media centre has a 300 GB HDD partitioned into two: 1) Ext4 50 GB (where I'll install the OS) 2) swap 6 GB (swap area) I'm wanting a third partition which I can store all my media on to. This partition will fill the rest of my HDD. Although, I'm stuck on which file system I should set it to. I need the file system to be fully compatible with Windows as I'm going to be removing the HDD from the media centre and plugging it into my main PC, running Windows 8, to transfer the media onto it. I can't transfer over Wi-Fi as the media centre won't be connected to the Internet. My options are: Ext4 journaling, Ext3 journaling, Ext2 journaling, ReiserFS journaling, btrfs journaling, JFS journaling, XFS journaling, FAT16 and FAT32. I know that FAT32 is compatible with Windows but it can only hold files that are 4 GB or less and my films are well over 4 GB. Some more than 10 GB. Is there a file system I can use which is supported by Linux and pops up under Computer in Windows?

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• Distribute Windows (XP or 7) as virtual appliance

  - by User32

  I'm looking at ways that may be possible to distribute a Microsoft Windows (e.g. 7) virtual appliance (such as VMWare image) pre-configured and installed with a large application of mine. Is this possible? If not, is it perhaps best to ask clients to perform a virtual appliance installation on their site and then install my application via a script of some sort? For these kinds of scenarios I see that open source OSes are heavily used, but in my case I cannot use Linux or any other open source OS due to some requirements.

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• Repairing a corrupt exFat file system

  - by Wandyer

  Long story short : I messed up my GPT and went on to try to fix it without asking anyone, just searching around. Didn't turn out too well. Right now all I'm concerned about is a 500GB that I formatted as exFat partition with some important files. But on my journey to fix, I may have used the 'fdisk' command on a GParted Live CD I have (couldn't get on any OS) and switched it to ext2. Now I can't get access to it, doesn't show up on Windows or Mac. Only on the partition table as ext2. I have got access to most of my files through recovery softwares but they cannot recover with the originial directory or file names, which would be a pain to fix. I want to know if there is a way to change back the file system to exFat without having to format it. Thanks in advance. EDIT: This is how my partitions look like right.

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• JDK8 New Build Infrastructure

  - by kto

  I unintentionally posted this before I verified everything, so once I have verified it all works, I'll updated this post. But this is what should work... Most Interesting Builder in the World: "I don't always build the jdk, but when I do, I prefer The New JDK8 Build Infrastructure. Stay built, my friends." So the new Build Infrastructure changes have been integrated into the jdk8/build forest along side the older Makefiles (newer in makefiles/ and older ones in make/). The default is still the older makefiles. Instructions can be found in the Build-Infra Project User Guide. The Build-Infra project's goal is to create the fastest build possible and correct many of the build issues we have been carrying around for years. I cannot take credit for much of this work, and wish to recognize the people who do so much work on this (and will probably still do more), see the New Build Infrastructure Changeset for a list of these talented and hard working JDK engineers. A big "THANK YOU" from me. Of course, every OS and system is different, and the focus has been on Linux X64 to start, Ubuntu 11.10 X64 in particular. So there are at least a base set of system packages you need. On Ubuntu 11.10 X64, you should run the following after getting into a root permissions situation (e.g. have run "sudo bash"): apt-get install aptitude aptitude update aptitude install mercurial openjdk-7-jdk rpm ssh expect tcsh csh ksh gawk g++ build-essential lesstif2-dev Then get the jdk8/build sources: hg clone http://hg.openjdk.java.net/jdk8/build jdk8-build cd jdk8-build sh ./get_source.sh Then do your build: cd common/makefiles bash ../autoconf/configure make We still have lots to do, but this is a tremendous start. -kto

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• Display Resolution Getting Changed Automatically (sometimes) - Win7x64 - ASUS M3A78-EM

  - by kamleshrao

  Hi Guys, AMD PC Motherboard - ASUS M3A78-EM (installed VGA drivers from ASUS website - AMD_VGA_V863200_XPVistaWin7.zip) It has VGA and HDMI inbuilt ports (ATI Radeon HD 3200 Graphics 256MB) VGA is connected to my ViewSonic Monitor. HDMI is connected to LG LCD TV OS - Windows 7 x64 Ultimate Sometimes, when I reboot/start my PC, my ViewSonic display resolution changes and does not show the recommended value(1440x900) in Resolution Settings. The HDMI display works well always. But after multiple reboots/starts, the problem gets fixed automatically and I get back my recommended resolution on ViewSonic display. I am not making any changes to the existing drivers. It sometimes work well, and sometimes doesn't work. Can someone assist me resolving this permanently.

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• Can't write to disk

  - by nofacts

  I have seen questions similar to this, but the answers are either beyond me or the situation doesn't quite match mine. Would appreciate some direction. I recently installed Ubuntu 12.04 LTS. The OS is on a disk formatted as ext4. I added another disk to the system and formatted it as W95 FAT 32 (LBA) (0x0c). I did this because I am moving from Windows to Linux, will be needing to go back and forth with data for a while, and might need to move the disk to a Windows machine. There may have been a better format to use, but if so I didn't know any better. I was able to transfer data from an external drive to this FAT32 drive with no problem. Now, though, when I try to create a new folder or write a file to the disk I get a message that the disk is read-only. If I go to the properties, permissions for the disk, for Folder Access it says 'create and delete files'. If I try to change File Access underneath to 'read and write', either nothing happens or I get a message it can't be done. Thank you for any help.

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• LVM mirroring VS RAID1

  - by syrenity

  Hi. Having learned a bit about LVM mirroring, I thought about replacing the current RAID-1 scheme I'm using to gain some flexibility. Problem is that according to what I found on the Internet, LVM is: 1) Slower then RAID-1, at least in reading (as only single volume being used for reading). 2) Non-reliable on power interrupts, and requires disk cache disabling for prevention of data loss. http://www.joshbryan.com/blog/2008/01/02/lvm2-mirrors-vs-md-raid-1/ Also it seems, at least to several setup guides I read (http://www.tcpdump.com/kb/os/linux/lvm-mirroring/intro.html), that one actually requires a 3rd disk for storing the LVM log. This makes the setup completely unusable on 2 disks installations, and lowers the amount of used mirror disks on higher amount of disks. Can anyone comment the above facts, and let me know his experience of using LVM mirroring? Thanks.

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• My 4 GB microSD card only allows me to use 1 GB

  - by James Litewski

  My phone came with a 4 GB microSD card. On the card it lists that 3 GB goes to Muve Music which is Cricket's music program, and I get 1 GB... Well, I don't pay for Muve Music, so why waste the space? I thought I'd be able to simply buy an adapter and reformat the microSD card to get the full 4 GB; but that wasn't the case... I could only find the 1 GB partition on the card. I even tried reformatting the disk, but I had no luck. How can I get the full 4 GB? BTW, I'm running Mac OS X v10.7 (Lion).

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• What does Libre Office do to an existing Excel sheet to bloat its size?

  - by Sn3akyP3t3

  I try to avoid using Libre Office on existing Excel created workbooks because of the potential for unpleasant results. In this case Libre Office bloated the size of the workbook for some reason unknown to me. I would like to know if Libre Office does this to all Excel workbooks or just something in that workbook that causes it. Software involved: Microsoft Office Excel 2010 Libre Office 3.5.x (exact version unknown) Dropbox (merely to sync changes) Platforms involved: Office on Windows (master of the obvious on that one I suppose..) Libre Office on Mac OS 10.6 Types of data stored in this workbook: Text Integers 1 column with a simple formula spanning the entire worksheet representing that particular row (=CONCATENATE(A2285,B2285,D2285), =CONCATENATE(A2286,B2286,D2286), etc.) Total of 3,500 plus rows Here is a photo with details described within, but I'll go ahead and explain the photo as well: This screenshot is from Dropbox history of the .xlsx workbook. Version 61 - 68 were Office Excel. Version 69 - 73 were Libre Office.

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• Why doesn't the Gtalk plugin work in Firefox 3.6 betas? [closed]

  - by etlovett

  I've done a quick Google search, Bugzilla search, and glanced at Google's site for the GTalk plugin, but I can't find an answer, so I thought I'd pose the question here: On OS X, in the Firefox 3.6 betas (I'm now on beta 5, but it's been happening since at least beta 3), the GTalk plugin doesn't work for me. I've been completely unable to use video chat in GChat, which forces me to open Firefox 3.5 whenever I want to use it. This happens even after I uninstall/reinstall the GTalk plugin. Anyone know why this is happening?

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• How to print TIFF files using MSFT Office Document imaging?

  - by Think Floyd

  OS: Vista and Windows7 I have Microsoft Office Document Imaging installed. .tif and .tiff files association is set to " Microsoft Office Document Imaging" When I open a TIFF file, it opens in " Microsoft Office Document Imaging". Good so far. However, when I right-click on the TIFF file and invoke print, I see a "Print Pictures" dialog, ("How do you want to print your pictures?") I have some applications installed on my machine that print incoming TIFF files on the printer. They work fine on XP. However, on Vista and Windows7, I get this "Print pictures" prompt requiring an user intervention (i.e, click on Print button). How do I get rid of this "Print Pictures" prompt?

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• Server reboots every 4.5-5.5 minutes...

  - by Andy

  Hi, I've recently installed a server in colocation, and my server is rebooting every 4.5-5.5 minutes. Regardless of the OS I run, it reboots. I have all ECC memory in the server, so it should correct errors if there is a bad bit in the memory, right? It's weird because it always happens about 4.5-5.5 minutes after bootup. My motherboard is a Supermicro X8DTL-iF. I read on a blog that another person had the problem, and supermicro recommended to do a BIOS update. Is this the right course of action?

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• Leveraging NuGet as a central repository for PowerShell modules

  - by cibrax

  We have been working a lot lately with PowerShell as part of our star product at Tellago Studios, “Moesion”. One of the main features we provide in Moesion is the ability to execute PowerShell commands remotely in a given server using a web mobile interface (You can read more in my previous post about Moesion). One of the things we realized in all this time is that PowerShell lacks of a central repository where IT guys or we, the developers, can easily grab and reuse commands.  All the commands or modules are basically spread across multiple places or websites, like personal blogs, TechNet or CodePlex projects to name a few making the search of them very hard. You are usually limited to use your favorite search engine and copy what you find. In addition, there is not an easy way to reuse, extend or version these commands, which also limits any contribution that you could make to the community.  My friend Jose wrote a great post the other day about the importance of reusing PowerShell modules, and what is the mechanism to reuse them. Jose, however, based his post in a custom implementation using a GIT repository for storing the modules. We have NuGet in the .NET platform for sharing and reusing existing libraries or code, so why can’t just leverage it for reusing PowerShell modules as well ?. Some teams in Microsoft are using NuGet for distributing libraries and binaries so it would be a great thing for all of us if they also distribute the scripting interfaces in PowerShell using NuGet. This applies to the .NET OS community as well. In fact, it looks like Andrew Nurse had the same idea and implemented a project for this in BitBucket, PsGet.

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• IPtables Traffic Quota - up and down

  - by Nick

  I've been trying to set up traffic quotas for users on a shared server and i believe [with my limited knowledge] that iptables --quota and ports which have been selected for each user [--dport] is the way to do this... iptables -A OUTPUT --dport 1,2,3,4... --quota 123412341234 -j ACCEPT iptables -A OUTPUT --dport 1,2,3,4... -j DROP I think something like this would work to limit the traffic [and reset every month] but its only for traffic going out. Is there something I could do to combine -A OUTPUT and -A INPUT into one quota? Or, is there a different method I could use to achieve the same thing more efficiently? OS is debian squeeze Thanks.

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• Sorting out mSSD acceleration on a Acer M3-581TG

  - by PhonicUK

  I recently purchased a Acer Timeline M3 Ultra, it ships with a 500GB HDD and a 20GB mSSD to use as a cache. First thing I did when I got it was format the drives and install a clean OS (on the HDD, the mSSD has nothing on it) - but now I can't figure out how everything needs to be configured in order to use the mSSD as a cache, it just looks like a standard storage drive. I've poked around in the BIOS and there is a SATA mode setting, but it only has one option (AHCI), most of the documentation I've seen on the subject says that the SATA controller needs to be in RAID mode otherwise 'Acceleration' isn't visible in the Intel SRT menu (which for me, it isn't) I've seen a few things that suggest I just need the correct partition layout, I tried this using fdisk from a Linux LiveCD but got nowhere. Any ideas? The laptop shipped with no recovery media so I'm marginally stumped. I don't have any issue with reformatting again if required.

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• Can't use command line – "command not found" after editing PATH

  - by MEM

  I'm running OS X Mavericks and was trying to install MAMP PRO 2.2. I was trying to configure the PATH variable to have the PHP binaries of MAMP PRO. I added the following line on my ~/.bash_profile file: export PATH=/Applications/MAMP PRO/bin/php/php5.5.3/bin:$PATH As you may notice, since I have MAMP PRO and not just MAMP, I've added a space. As a consequence, I know have the following error each time I run the terminal: -bash: export: `PRO/bin/php/php5.5.3/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin': not a valid identifier Worst: I can't get any command to run, like: ls, clear etc. I always get: "command not found" I don't even know the absolute path for ls. How can I make the commands work again, so that I can properly fix the path I was trying to setup on the .bash_profile file?

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• why is my Bamboo pen always drawing and a yellow note pad appears?

  - by cboi

  I have had a Bamboo pen and touch tablet for a couple years but have not used it in a long time. Now that I'm trying to use it again it is behaving very strangely. It won't drag anything on my desktop, the minute I try there is this yellow pad that appears and the pen draws a line on it instead of dragging the file. The yellow pad and drawn line disappear the second I lift the pen from the tablet. The most frustrating is it does the same thing when I try to draw in Photoshop. It won't draw with the paintbrush on my canvas because the minute I try to this yellow pad appears and it draws a line on it instead of on the canvas, which disappears the second I lift the pen from the tablet. It also bizarrely automatically switches from the paintbrush to the automatic selection tool. Has anyone had this problem? Any suggestions on how to fix this? I operate with Mac OS X 10.5.8

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• Identifying .doc/.docx files that contain images

  - by rev

  I'm moving my notes to evernote. To this end I need to convert .doc/.docx files to rtf. The reason for this is that I have a script to import rtf into evernote. However, some of my .doc/.docx files contain images. Is there any way to identify which .doc/.docx files contain images without viewing them all? I have thousands. This way I can simply open the few that have images and copy/paste the entire content straight into evernote. Should say that I'm using OS X 10.6.8.

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