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• Unable to boot from USB boot drive for AMD Athlon 64

  - by Nagarjun

  I am trying to install Ubuntu 13.04 ISO for AMD64 Athlon processor using USB drive (8GB). I did create a bootable USB using the USB installer from Win7 intel 32bit processor (followed steps from here: http://www.ubuntu.com/download/desktop/create-a-usb-stick-on-windows). This USB is unable to boot on my AMD64 bit processor. The bios is able to detect the USB and once I change the boot order to USB and save exit from bios, I get a message saying "DISK BOOT FAILURE, INSERT SYSTEM DISK AND PRESS CONTINUE" and unable to proceed further. However earlier to this I have successfully installed Ubuntu 13.04 on to my laptop which has Intel 32 bit core i5 processor with the same procedure but my desktop which has AMD64 is failing. I also tried to create the USB installer on my desktop which has the AMD64 bit processor and tried booting which also resulted in the same error. (My desktop currently has Win XP) Please help as I have run out of options. thanks, Nagarjun

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• External hard drive failing, is backup recovery possible?

  - by backitup

  I have a Seagate Freeagent external hard drive. While I was backing it up on Windows XP my pc crashed and I received the horrifying "Delayed Write Error" when I rebooted citing "$MFT" and a few other files. I tried to unmount it, but to no avail. Now my pc just crashes when I try to access it via Windows. In Ubuntu I am able to view it through disk utility. SMART status is "DISK FAILURE IMMINENT". Fdisk doesn't work, and the SMART tests fail on "Reallocated Sector Count". Is there any way for me to rescue any of my data. I can still access the drive but as soon as I do that it crashes.

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• USB keyboard does not load after 13.10 upgrade

  - by Paul

  Problem: Running kernel 3.11.0-12-generic after a Ubuntu upgrade from 13.04 to 13.10 my USB keyboard is not recognised, thus I am not able to unlock my encrypted disk. I suspect it might be related to a minimal/incorrect install of initrd. Question: How do I go about getting the newest kernel to recognise my generic USB keyboard, allowing me to unlock my encrypted disk? What I have tried: I have already re-installed the newest kernel: sudo apt-get install --reinstall linux-image-generic linux-image and I have also updated the initrd: update-initramfs -c -k 3.11.0-12-generic Back story: I just completed upgrading my Ubuntu system from 13.04 to 13.10. When I subsequently rebooted by system I was no longer able to enter my encryption password (passphrase) as the keyboard drivers did not load. Temporary workaround: Earlier in the boot process (before the keyboard stops working) I was able to enter GRUB menu were I choose to boot from an older kernel (3.8.0-31-generic) which did load the USB keyboard drivers. This is currently the kernel I am running. Thanks

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• Tell the kernel to strongly cache a particular directory

  - by silviot

  This question is a rephrasing of Optimizing EXT4 performance. I have a directory that contains build files, most very small, but totaling 5.6G. I usually access the same subset of files (some thousands, for some tens of megabytes) over and over again. The subset changes daily (different projects, different versions of libraries). What takes longer when I use it seem to be disk seeks. For example if I do a du twice the second time it takes as much time as the first, and disk activity is similar. Ideally I'd like to tell the kernel to allocate X Mb to the metadata and Y to data in the folder, like the options for nfs cache. Is it possible in some way, other than mounting nfs from localhost and caching it to a ramdisk?

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• Very slow startup after update to 12.04

  - by M Legoh

  My hardware: Dell Latitude D600 laptop Processor: Intel Pentium (r) 1.8 GHz Memory 1.2 GiB Graphics R200 (RV250 4C66) x86/MMX/SSE2 TCL DRI2 Disk: 37.7 gb I did an update from 11.?? using the automatic system update that pops up when you switch/log on. Ever since then when I switch on the machine it takes approximately one hour to get to the login screen. Sometimes the actual login will take time too, but sometimes within a couple of minutes I am logged in. Once I am logged in I find I can work normally, the response is not swift, but is neither too slow that I cannot work. I was wondering if there was anything I could do to speed things up. I deliberately did not do a clean install from disk, because I did not want to loose settings on the machine.

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• I can connect to Samba server but cannot access shares.

  - by jlego

  I'm having trouble getting samba sharing working to access shares. I have setup a stand-alone box running Fedora 16 to use as a file-sharing and web development server. It needs to be able to share files with a Windows 7 PC and a Mac running OSX Snow Leopard. I've setup Samba using the Samba configuration GUI tool on Fedora. Added users to Fedora and connected them as Samba users (which are the same as the Windows and Mac usernames and passwords). The workgroup name is the same as the Windows workgroup. Authentication is set to User. I've allowed Samba and Samba client through the firewall and set the ethernet to a trusted port in the firewall. Both the Windows and Mac machines can connect to the server and view the shares, however when trying to access the shares, Windows throws error: 0x80070035 " Windows cannot access \\SERVERNAME\ShareName." Windows user is not prompted for a username or password when accessing the server (found under "Network Places"). This also happens when connecting with the IP rather than the server name. The Mac can also connect to the server and see the shares but when choosing a share gives the error: The original item for ShareName cannot be found. When connecting via IP, the Mac user is prompted for username and password, which when authenticated gives a list of shares, however when choosing a share to connect to, the error is displayed and the user cannot access the share. Since both machines are acting similarly when trying to access the shares, I assume it is an issue with how Samba is configured. smb.conf: [global] workgroup = workgroup server string = Server log file = /var/log/samba/log.%m max log size = 50 security = user load printers = yes cups options = raw printcap name = lpstat printing = cups [homes] comment = Home Directories browseable = no writable = yes [printers] comment = All Printers path = /var/spool/samba browseable = yes printable = yes [FileServ] comment = FileShare path = /media/FileServ read only = no browseable = yes valid users = user1, user2 [webdev] comment = Web development path = /var/www/html/webdev read only = no browseable = yes valid users = user1 How do I get samba sharing working? UPDATE: I Figured it out, it was because I was sharing a second hard drive. See checked answer below. Speculation 1: Before this box I had another box with the same version of fedora installed (16) and samba working for these same computers. I started up the old machine and copied the smb.conf file from the old machine to the new one (editing the share definitions for the new shares of course) and I still get the same errors on both client machines. The only difference in environment is the hardware and the router. On the old machine the router received a dynamic public IP and assigned dynamic private IPs to each device on the network while the new machine is connected to a router that has a static public IP (still dynamic internal IPs though.) Could either one of these be affecting Samba? Speculation 2: As the directory I am trying to share is actually an entire internal disk, I have tried these things: 1.) changing the owner of the mounted disk from root to my user (which is the same username as on the Windows machine) 2.) made a share that only included one of the folders on the disk instead of the entire disk with my user again as the owner. Both tests failed giving me the same errors regarding the network address. Speculation 3: Whenever I try to connect to the share on the Windows 7 client I am prompted for my username and password. When I enter the correct credentials I get an access denied message. However I did notice that under the login box "domain: WINDOWS-PC-NAME" is listed. I believe this could very well be the problem. Speculation 4: So I've completely reinstalled Fedora and Samba now. I've created a share on the first harddrive (one fedora is installed on) and I can access that fine from Windows. However when I try to share any data on the second disk, I am receiving the same error. This I believe is the problem. I think I need to change some things in fstab or fdisk or something. Speculation 5: So in fstab I mapped the drive to automount in a folder which works correctly. I also added the samba_share_t SElinux label to the mountpoint directory which now allows me to access the shares on the Windows machine, however I cannot see any of the files in the directory on the windows machine. (They are there, I can see them in the fedora file browser locally)

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• So You Want To Build a SPARC Cloud

  - by user12601629

  Did you ever wish you could get the industrial strength power of UNIX/RISC with the flexibility of cloud computing?  Well, now you can!  With recent advances from Oracle it's possible to build an incredibly high-performance, flexible, available virtualized infrastructure based on Solaris and SPARC.  Here's the recipe! Authored in collaboration across the Oracle "Systems Group" team, we now have a complete best practice guide for you.  Click below to download it: Best Practices for Building a Virtualized SPARC Computing Environment Inside you'll find recommendations for how and when to leverage technologies like: SPARC T4 OVM for SPARC hypervisor (version 2.2 and newer) Solaris 11 Ops Center 12c ZFS Storage Appliance Oracle network switches Based on following these best practices, you'll be able to construct a dynamic, virtualized infrastructure that allows for: Easy, GUI-based provisioning on new VMs Automated HA failover in the event of physical server failures Automatic load balancing across a cluster of VM hosts Complete end-to-end monitoring You should download this paper and check it out.  Even if you aren't planning on buying all new hardware, and instead want to transform some existing gear into a dynamic virtualized environment then this paper will give you concrete info on what to do and the trade-offs you'll make. Have fun getting started on your journey to build a SPARC cloud!

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• PC won't boot up after installing 11.10

  - by bakhshu

  I have a HP/Compaq s1010z (AMD64) desktop and installed 11.10 from a CD (using the entire disk). So it formatted the entire drive, went through installation and then it ejected the CD and asked me to click the Restart button, which I did. It rebooted fine the first time, but any time thereafter, it fails. Meaning, after the initial BIOS screen, the monitor seems to be stuck in limbo with a text cursor blinking on the top left corner, as if it can't find anything to boot from. At first I tried reinstalling (reformat entire drive again) - no improvement. Then I did an in-place re-installation (leave home dirs in place, just redo the OS), nothing there either. Then I put in the 11.04 CD, changed the boot order to CD first, and got the CD menu, chose 'Boot from first hard disk' and it booted fine. The problem is that I can't boot without the 11.04 CD, how ironic! Any ideas?

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• I want to increase the size of my boot partition (Ubuntu 14.04 version) [duplicate]

  - by Mike

  This question already has an answer here: How do I free up more space in /boot? 11 answers How to resize partitions? 5 answers I read in another post that kernels are distributed as new releases rather than upgrades. I didn't know this when I was allocating space to my partitions during my initial install of Ubuntu. As a result I ran out of space on my boot partition. Can I increase the size of it using GParted and how do I do this without doing damage to my system? 1 1049kB 512MB 511MB fat32 boot 2 512MB 768MB 256MB ext2 3 768MB 1000GB 999GB lvm Model: Linux device-mapper (linear) (dm) Disk /dev/mapper/ubuntu--vg-swap_1: 3712MB Sector size (logical/physical): 512B/4096B Partition Table: loop Number Start End Size File system Flags 1 0.00B 3712MB 3712MB linux-swap(v1) Model: Linux device-mapper (linear) (dm) Disk /dev/mapper/ubuntu--vg-root: 996GB Sector size (logical/physical): 512B/4096B Partition Table: loop Number Start End Size File system Flags 1 0.00B 996GB 996GB ext4 Sorry, don't know how to capture and post the terminal output screen.

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• Domain model integration using JSON capable DTOs

  - by g-makulik

  I'm a bit confused about architectural choices for the java/web-applications world. The background is I have a system with certain hardware components (that introduce system immanent active behavior) and a configuration database for system meta and HW-components configuration data (these are even usually self contained, since the HW-components persist configuration data anyway). For realization of the configuration/status data exchange protocol with the HW-components we have chosen the Google Protobuf format, which works well for the directly wired communication with these components. Now we want to develop an abstract model (domain model) for those HW-components and I have the feeling that a plain Java class model would fit best for this (c++ implementation seems to have too much implementation/integration overhead with viable language-bridge interfaces). Google Protobuf message definitions could still serve well to describe DTO objects used to interact with a domain model API. But integrating Google Protobuf messages client side for e.g. data binding in the current view doesn't seem to be a good choice. I'm thinking about some extra serialization features, e.g. for JSON based data exchange with the views/controllers. Most lightweight solutions seem to involve a python based presentation layer using JSON based data transfer (I'm at least not sure to be fully informed about this). Is there some lightweight (applicable for a limited ARM Linux platform) framework available, supporting such architecture to realize a web-application?

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• IE Search Provider: Specifying gTLD / Country-Specific Site

  - by jwa

  I am based in the UK, and as such typically use google.co.uk as my search engine. However, my employer is based in continental Europe, and thus my internet proxy is located overseas. As a result, IP geo-location presents a location outside of the UK. Google detects this, and as a result will redirect my searches from the address bar to a foreign Google domain. This leads to "local" answers having a higher ranking, many of which are not written in English language! Is there a specific search provider / URL I can give to IE which will use a specific gTLD of google (.co.uk), rather than performing the location-based redirect?

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• Java vs. C# - Productivity perspective

  - by Edin Dazdarevic

  If you have a number of years experience in working with JAVA and a number of years experience in working with C# and .NET, I would value your opinion on software development productivity differences between these two environments. One of our customers is considering to technically replace their existing software solution. As the replacement will require approx. 10 - 15 man years work, a choice for JAVA or .NET, based on productivity differences between the them, may significantly influence the investment required and time-to-market. Would you be able to provide us, based on your honest and expert opinion, an indication of software development productivity differences between JAVA and C#/.NET? I would prefer to receive an answer as follows: My experience is based on X years experience working with JAVA and X years experience working with C#/.NET. JAVA is X% more productive then C#.NET or C#/.NET is X% more productive than JAVA if you take the the following into account . . . . . . . Thanks

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• Help understanding my hard drive / partitioning situation... Pictures Included! :)

  - by xopenex

  So I have installed windows 7, and two different distros of linux... I have read and tried to understand things like "spanned" "extended" "primary" "swap" "dev/dev2/" "GRUB" "Windows Boot Loader/Manager" etc.... I have a very very limited understanding of all of it! :) I am trying to figure out how to get all OS boot options on one Boot manager (I'm thinking it will be GRUB), because at this point when i turn on my computer, I basically get two booting options (excluding the memtest options etc)... One options is to boot one of my Linux Distros and the second option is to boot my Windows 7. When i go with the first option, Linux boots up... when i go with the second Windows 7 option, I get the "windows boot manager screen" and I can choose Windows 7 or my other installation of Linux (Ubuntu)... In addition, I did not have swap partition from my first installation of Linux, I created it during the installation of my second distro... This is a lot of info for me, but I'm guessing that you linux Gurus, pretty much understand what is going on! Hope my question makes sense.. i will try and simplify... Can i get all 3 OS's optioned to boot from one GRUB? Can i get both Linux distros to use one swap file (I have seen this possible in other threads, but because of how my disk is partitioned, i dont know if i can do this) I hope that i dont have to start all over installing one after the other. Ive got some pics that may help understand my hard drive situation! Thanks guys! :) EDIT... i had some pics, but im a new member.. so cant post them... :( here is a description of the pics... incase i can email them or post later. [grub][3] First Screen I come to after turning on computer... "Ubuntu with linux 3.2.6" (highlighted) fires up Linux perfectly... other choice at bottom of list "Windows 7 (loader) (on dev/sda1)... brings me to the next picture below.. windows boot manager [win boot mngr][6] both options here load the os selected [Disk Manager Windows][1] picture of my hard drive situation through windows disk manager utility [gparted][2] picture of my hard drive situation through "gparted" [mycomp][4] picture of my hard drive situation through "my computer" [paragon][5] one last pic of my hard drive situation through the eyes of "paragon"

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• Can't boot ubuntu 12.04, stuck in busybox. Can't view files from ubuntu trial disc, or windows partition

  - by Maura

  So, I'm slightly computer literate, and find myself frustrated and overwhelmed. My computer is a acer laptop, extensa 5620-6572. I have a dual boot with windows vista and ubuntu 12.04. The ubuntu 12.04 I got was from an upgrade, not a disc. I tried to load ubuntu 12.04, and it gets stuck in the "busybox", and I don't know how to proceed from there. I went to my windows partition and downloaded Ex2 from http://sourceforge.net/projects/ext2fsd/ and thought I'd try access my files and save them to a external HD. Then when I restarted my computer and went to windows, it always freezes after it loads the OS. So then, I downloaded and burned a ubuntu 12.04 boot disk, and the disk works fine. But I still can't figure out how to view files on my harddrive.

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• INstlling ubuntu

  - by Erich

  Am trying to install ubuntu 12.04 on a pentium 4 with a hard disk that's been totally wiped clean. Have made an iso image, burned it on a cd and it has been verified. Checked to see if separate files have been burned on cd and they have. When I boot to the disk I get the word unbuntu with some progress dots, 5 min later it goes to a red screen with the mouse arrow on screen. It has stayed in this condition for over half an hour now. Help? erich

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• Can't open Windows 8 after installing ubuntu 12.04

  - by Pyttar

  Yesterday, I tried ubuntu 12.04 LTS and I liked it, so I installed it in my computer with Windows 8. I managed to create a disk partition in Windows and I named it U:\UBUNTU. Then I installed Ubuntu inside this partition, but now, when I try to enter in my Windows 8, it gives me an error message: error: Secure Boot forbids loading module from (hd0,gpt5)/boot/grub/ntfs.mod. error: no such device: 2402319002316706 error: unknow command 'drivemap'. error: invalid EFI file path. Press any key to continue... What can I do? Please I need urgent help, I need to access to Windows 8 and I don't want to lose any data... I checked for the Windows disk and I can se there's all my information there, so, I didn't lose anything. Thanks.

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• No video signal after install

  - by tW4r

  Today I tried to install Ubuntu 12.10 to my machine, but all the time I encountered the same problem, I successfully boot from Ubuntu 12.04 DVD, and a purple background comes up with accessibility and keyboard icons at the bottom of the screen, then when you wait a while a monitor text comes up "No signal" (Keep in mind that this signal is only shown when there's cable in the monitor HDMI plug), and nothing happens, a little later disk drive stops flashing meaning that disk finished being read. Even if you reset the computer you still get no signal, you have to turn the power of and on again, and plug HDMI out and put it in again. My info: Graphics card: ATI/AMD Radeon HD 4850 Connection to monitor: HDMI Monitor: Samsung SyncMaster T220HD

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• What is Rails way to save images?

  - by user

  I develop on iOS, and I'm switching from a PHP backend to Ruby on Rails. The interchange format is JSON. A quick Google search for 'save images in Rails' has nearly every result talking about saving image data as blobs to the database. I might be mistaken, but I'm under the impression that saving image data in a database is a huge waste of time and space (as opposed to saving a link to the file location ('/img/subcat/4656.png'). In PHP, it's pretty standard to receive the data, generate a filename, then save that file to disk, and then update the database with the image's location on disk. Is this the same for Rails, or is there some built-in ActiveRecord image functionality I'm not aware of?

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• Delete all traces of windows from Ubuntu

  - by TheOm3ga

  I used to have a dual boot in one of my hard disk drives - Ubuntu and Windows 7. Then, I added a SSD which is now my main hard disk drive, and I'm using it for Windows 7 completely, keeping Ubuntu in the old HD. I restored the Grub so everything works ok, except for one thing. Everytime I update the grub, it detects two windows: Found Windows 7 (loader) on /dev/sda1 Found Windows 7 (loader) on /dev/sdb1 Obviously, I don't want it to detect the Windows on sdb1. Because I no longer use it (I manually deleted the files). What can I do about that without wiping out completely the partition?

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• Dynamic object creation with HashMap

  - by Salor

  I want to use a HashMap to dynamically create objects based on the key. I have a Random Map Generator that stores the maps in 3D Arrays of Type Integer[][][]. Upon creation of the actual map I iterate through this array and based on the Integer I want to create the right block. Example: Integer[][][] map ... map[6][6][6] = 3; 3 is a Earth-Block and now I want to initialize a new Block of this type and give it the right coordinates. Currently I store my Bindings from Integer to Class in a HashMap(Integer, String) and create my objects like that: int id = array[x][y][z]; String block_name = Blocks.map.get(id); Block block = (Block) Class.forName(block_name).newInstance(); block.setPosition(x,y,z); But I want to avoid newInstance() if possible. I've never worked that dynamically with Java before and I couldn't find a solution like changing the HashMap to (Integer, Class) or something. I just need to create a new Object based upon the Integer. Any ideas/solutions? Thanks in advance and have a wonderful day!

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• Clean install of 12.04 won't boot from HDD

  - by MarchingKazoo

  Downloaded 12.04.2. Made CD. Machine boots from CD as expected. Installed onto HD. Upon reboot, "Read error" message appears. Upon booting from CD, the HD appears as expected: One partition for Ubuntu, taking up about 12 gig, the rest empty. Lather, rinse, repeat five times. Results of "sudo fdisk -l": Disk /dev/sda: 200.0 GB, 200049647616 bytes 255 heads, 63 sectors/track, 24321 cylinders, total 390721968 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x000dfa3e Device Boot Start End Blocks Id System /dev/sda1 * 2048 386596863 193297408 83 Linux /dev/sda2 386598910 390721535 2061313 5 Extended /dev/sda5 386598912 390721535 2061312 82 Linux swap / Solaris Should this be complicate? Seems no.

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• Can't reset BackInTime snapshot path

  - by user87337

  I've been using BackInTime with Ubuntu 12.04. The disk I was saving to is no longer available. BackInTime insists that I bring it back. (It says "Can't find snapshots folder. If it is on a removable drive please plug it and then press OK") No matter what I've tried, I can't seem to get beyond this point. I've even tried removing BackInTime and re-installing it. The problem persists. How can I change the snapshots path without the missing disk? ---Jack

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• Windows not shown in Grub after installing 12.10

  - by rowanquigley

  I just installed 12.10 alongside Windows 7. I split my partition into two because disk reader during the installation didn't recognize Windows 7 as being installed on the computer. It installed correctly and I restarted only to find out it wasn't recognized in Grub also and booted straight to Ubuntu. I read this post and thought of using boot-repair would be fine but I gain this error: gpt detected. Please create bios-boot partition (>1MB, unformed filesystem, bios_grub flag). This can be performed via tools such as Gparted. Then try again. I've no idea what it means or what to do next. Suggestions would be appreciated and I have lost my Windows installation disk and I really don't want to have to go looking for it.

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• About my main Project

  - by user207365

  My project is to build a AI(Artificial Intelligence) system in which i am planning to have a raspberry pi or Intel i3/i5 processor. Raspberry pi is small and efficient but i don't know whether it can support 2 TB or more external hard disk. Where as in Intel i can have internal hard disk and at the same time external also and will be more faster with 2gb or 4gb RAM. Which is better Raspberry pi or Intel,is it possible to stimulate my ubuntu in Intel processor. the main reason using processor it to give the system decision making capability ,understanding and analyzing capabilities using different algorithm's .my processor should analyze the condition take proper steps in running the appropriate application

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• unable to clean intsall

  - by pkb

  I have downloaded an ISO file of UBANTU 12.10 x86 from the official website (www.ubantu.com). When I tried to install it everything was going good till I got the error message something like "the media you are using is probably currupt or you have an hard disk error . It did't told me what to do. I am already running WINDOW 7 ultimate in my pc and it is running fine i have tested my hard disk for error and no errors was found by "system mechanic pro 11" . after that i tried to install my WINDOW 7 on the same partition and it was successful . Even now I am unable to install UBANTU. It is my first experience with UBANTU so I don't know what to do. please guide me . my email is [email protected]

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