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• Create bootable USB install image from command line?

  - by j-g-faustus

  I'm trying to create a bootable USB image to install Ubuntu on a new computer. I have done this before following the "create USB drive" instructions for Ubuntu desktop, but I don't have an Ubuntu desktop available. How can I do the same using only the command line? Things I've tried: Create bootable USB on Mac OS X following the ubuntu.com "create USB drive" instructions for Mac: Doesn't boot. usb-creator: According to apt-cache search usb-creator and Wikipedia usb-creator only exists as a graphical tool. "Create manually" instructions at help.ubuntu.com: None of the files and directories described (e.g. casper, filesystem.manifest, menu.lst) exist in the ISO image, and I don't know what has replaced them. (At my disposal is Mac OS X and Ubuntu server; I have neither Ubuntu desktop nor Windows.)

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• Converting world space coordinate to screen space coordinate and getting incorrect range of values

  - by user1423893

  I'm attempting to convert from world space coordinates to screen space coordinates. I have the following code to transform my object position Vector3 screenSpacePoint = Vector3.Transform(object.WorldPosition, camera.ViewProjectionMatrix); The value does not appear to be in screen space coordinates and is not limited to a [-1, 1] range. What step have I missed out in the conversion process? EDIT: Projection Matrix Perspective(game.GraphicsDevice.Viewport.AspectRatio, nearClipPlaneZ, farClipPlaneZ); private void Perspective(float aspect_Ratio, float z_NearClipPlane, float z_FarClipPlane) { nearClipPlaneZ = z_NearClipPlane; farClipPlaneZ = z_FarClipPlane; float yZoom = 1f / (float)Math.Tan(fov * 0.5f); float xZoom = yZoom / aspect_Ratio; matrix_Projection.M11 = xZoom; matrix_Projection.M12 = 0f; matrix_Projection.M13 = 0f; matrix_Projection.M14 = 0f; matrix_Projection.M21 = 0f; matrix_Projection.M22 = yZoom; matrix_Projection.M23 = 0f; matrix_Projection.M24 = 0f; matrix_Projection.M31 = 0f; matrix_Projection.M32 = 0f; matrix_Projection.M33 = z_FarClipPlane / (nearClipPlaneZ - farClipPlaneZ); matrix_Projection.M34 = -1f; matrix_Projection.M41 = 0f; matrix_Projection.M42 = 0f; matrix_Projection.M43 = (nearClipPlaneZ * farClipPlaneZ) / (nearClipPlaneZ - farClipPlaneZ); matrix_Projection.M44 = 0f; } View Matrix // Make our view matrix Matrix.CreateFromQuaternion(ref orientation, out matrix_View); matrix_View.M41 = -Vector3.Dot(Right, position); matrix_View.M42 = -Vector3.Dot(Up, position); matrix_View.M43 = Vector3.Dot(Forward, position); matrix_View.M44 = 1f; // Create the combined view-projection matrix Matrix.Multiply(ref matrix_View, ref matrix_Projection, out matrix_ViewProj); // Update the bounding frustum boundingFrustum.SetMatrix(matrix_ViewProj);

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• InfiniBand Enabled Diskless PXE Boot

  - by Neeraj Gupta

  If you ever need to bring up a computer with InfiniBand networking capabilities and diagnostic tools, without even going through any installation on its hard disk, then please read on. In this article, I am going to talk about how to boot a computer over the network using PXE and have IPoIB enabled. Of course, the computer must have a compatible InfiniBand Host Channel Adapter (HCA) installed and connected to your IB network already. [ Read More ]

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• Graphics and USB devices freezing soon after OS loads

  - by Andrew

  I run Ubuntu/Windows dual boot. Last night I started the upgrade to Ubuntu 12.04, and my computer has not worked since in either Windows or Ubuntu. Here's what I got when I rebooted after the upgrade, and continue to get every time I boot: Gets to GRUB screen OK. Choose Ubuntu - black screen or crazy purple lines. At first I assumed something went wrong with the upgrade (often happens). Choose Windows - works fine, I log in, but soon after that the graphics freeze (sometimes with purple artifacts). The keyboard and mouse (both USB) also lose power at the same instant, and none of the USB ports have power to them. This happens sooner or later every time I boot. Update: the HDD also appears to lose power at the same point. I have tried a live CD, but my computer refuses to boot any CD even after disabling all other boot options in the BIOS. I have disconnected everything except keyboard, mouse, graphics card with one monitor, one RAM sick and HDD; no change. I also took the little battery out to reset CMOS. I am pretty sure no matter how wrong the Ubuntu upgrade went, it wouldn't cause the above symptoms in Windows. So the only explanation I can think of is that a hardware failure occurred at the same time. Some possible causes of this I can think of are: A couple of days before this, I added a third screen (which worked fine). About a week before, my house lost power in a storm (no ill effects over the past few days though). What can I do, other than buy a new motherboard/CPU and hope it works? Unfortunately I don't have another box to swap parts into to test at the moment.

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• How restore DriveImage XML image if cannot make BartPE CD

  - by CChriss

  I have a Windows Vista laptop that won't boot at all. On the D: drive I have DriveImage XML images of C: drive, but I don't have a BartPE boot CD and I don't have a Vista install CD. How can I image the C: using the images on D: if I can't make a BartPE CD because I can't boot to Windows? Is there a BartPE (with DriveImage XML plugin) iso I can download from somewhere, or what can I do? Thanks.

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• Installing Ubuntu to a USB drive

  - by Carl Smotricz

  I'm having a rough time getting Ubuntu to run from a 250 GB USB hard drive. I booted Ubuntu 9.10 from a CD and ran the regular "install" to the attached USB drive. I used the "advanced" option on the drive partition question to put the boot loader on /dev/sdb (the USB disk) but when I boot the machine it doesn't recognize there's a boot loader on the USB drive (it offers to boot from 2 other devices but not the USB disk). I also tried booting from the Ubuntu CD and using usb-creator-gtk to set up the USB drive. Seems to me this is meant to work with flash drives. I got a bootable USB disk but it looked and worked like the CD, i.e. it gave me options of "live CD" operation, installing, memtest, etc. That's not the way I want to run the system. Some help in installing Ubuntu, bootable into a "full" running system on my USB drive would be appreciated.

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• Steam freezes at login screen

  - by Snail284069

  I have just installed Steam on Xubuntu, and after it finished installing it went to the login screen, but the screen is frozen, and I cannot press the buttons. When running Steam though the terminal it says: alex@Craptop:~$ steam Running Steam on ubuntu 14.04 32-bit STEAM_RUNTIME is enabled automatically Installing breakpad exception handler for appid(steam)/version(1400690891_client) Installing breakpad exception handler for appid(steam)/version(1400690891_client) Installing breakpad exception handler for appid(steam)/version(1400690891_client) Installing breakpad exception handler for appid(steam)/version(1400690891_client) Gtk-Message: Failed to load module "overlay-scrollbar" Gtk-Message: Failed to load module "unity-gtk-module" Installing breakpad exception handler for appid(steam)/version(1400690891_client) [0522/174755:WARNING:proxy_service.cc(958)] PAC support disabled because there is no system implementation Fontconfig error: "/etc/fonts/conf.d/10-scale-bitmap-fonts.conf", line 70: non-double matrix element Fontconfig error: "/etc/fonts/conf.d/10-scale-bitmap-fonts.conf", line 70: non-double matrix element Fontconfig warning: "/etc/fonts/conf.d/10-scale-bitmap-fonts.conf", line 78: saw unknown, expected number Installing breakpad exception handler for appid(steam)/version(1400690891_client) Installing breakpad exception handler for appid(steam)/version(1400690891_client) [HTTP Remote Control] HTTP server listening on port 35849. Installing breakpad exception handler for appid(steam)/version(1400690891_client) Installing breakpad exception handler for appid(steam)/version(1400690891_client) Process 2764 created /alex-ValveIPCSharedObjects5 Installing breakpad exception handler for appid(steam)/version(1400690891_client) Generating new string page texture 12: 48x256, total string texture memory is 49.15 KB Generating new string page texture 13: 256x256, total string texture memory is 311.30 KB Generating new string page texture 14: 128x256, total string texture memory is 442.37 KB Generating new string page texture 15: 384x256, total string texture memory is 835.58 KB and then the terminal gets stuck too, letting me type into it but not doing anything. I tried reinstalling and restarting the computer, but it still keeps happening.

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• Jimmy Bogard to teach next MVC Boot Camp in Austin, TX on May 26th

  Jimmy Bogard is again teaching the MVC Boot Camp from Headspring.  http://www.headspringsystems.com/services/agile-training/mvc-training/ The class runs 3 days from May 26-28.  Give us a call at 512-459-2260 to inquire about an available discount. ...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• Issue booting Linux Mint from Live CD?

  - by Vee

  I had Windows 8 and Linux Mint 15 dual booted on my laptop. When I first installed Linux, I wasn't able to load into because the grub would not show. To fix this, I used boot-repair from a Live CD. This time, I updated to Windows 8.1 and it showed a watermark telling me my secure boot wasn't configured properly. I then went and enabled secure boot (BIOS) and I believe it was after that that the Grub would not show once again. I tried to boot from a Linux CD again but when I try, it gives me the following errors: error: failure reading sector 0x0 from 'hd1' error: you need to load the kernel first. Press any key to continue... Before, it was giving me an error with sector 0x6d200 or something instead of 0x0. I am completely unsure of what to do. I do not know what other details to give except that this my have happened after I enabled secure boot, and I actually clicked reset to default setting so I am unsure if any other settings were changed in the BIOS menu.

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• Can you install ubuntu on xp and then uninstall xp? how?

  - by Eli

  I have a problem with my pc, you can read about it here if you like http://yhoo.it/qIQyMw anyway, I might go for ubuntu, the thing is I'm in Lebanon and here few, very few people use linux, most of them never heard about ubuntu lol, therefore you'll be really lucky if you can buy an ubuntu cd or even if you find someone can find someone capable of installing it. So when they fix my pc, they might install xp coz they don't have a linux operating system, and i hate win 7 and vista so I'll have to download ubuntu and install it by myself, I don't want to dual boot coz i don't have a super computer lol, i have used ubuntu on my vps, never on desktop before so i would like to know if you can download ubuntu, install it, on a xp pro, then remove xp pro? is there any tutorial? thank you

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• Installing Ubuntu 12.04 on the Hp Mini 210-2090nr

  - by Dalton Bailey

  When i got this netbook last year i planned n putting ubuntu netbook remix on it but i never did and now i can no longer booot n to windows for some reason so i finally decided to do it but after makig a usb stick with ubuntu on it it will not get to the menu where there is the black and white ubuntu logo and the option to install try and so on. I know to usb is configured correctly it will boot on other computers but on the netbook it only flashes SYSLINUX 4.06EOD..... and then flashs blue before turning black with the whit undercore in the top right corner for a very long time. any suggestions ive been told to disable acpi but i cant find it in the bios. (btw im uing 12.04 though ive tried 11.04 and used unetbootin linux live installer and universal usb installer to make the usb)

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• Mac questions: installing TrueCrypt and Windows 7

  - by KeyStroke

  Hi, I'm about to buy a Mac laptop, but I need to be able to use Windows 7 as well + encrypt the HDD with TrueCrypt (or a better alternative for the mac). My questions are: 1) How well does Windows 7 perform under boot camp? 2) Will I be able to encrypt the whole HDD (with TrueCrypt or whatever else) and still use boot camp to dual-boot? Your help is much appreciated

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• How to Handle frame rates and synchronizing screen repaints

  - by David Kroukamp

  I would first off say sorry if the title is worded incorrectly. Okay now let me give the scenario I'm creating a 2 player fighting game, An average battle will include a Map (moving/still) and 2 characters (which are rendered by redrawing a varying amount of sprites one after the other). Now at the moment I have a single game loop limiting me to a set number of frames per second (using Java): Timer timer = new Timer(0, new AbstractAction() { @Override public void actionPerformed(ActionEvent e) { long beginTime; //The time when the cycle begun long timeDiff; //The time it took for the cycle to execute int sleepTime; //ms to sleep (< 0 if we're behind) int fps = 1000 / 40; beginTime = System.nanoTime() / 1000000; //execute loop to update check collisions and draw gameLoop(); //Calculate how long did the cycle take timeDiff = System.nanoTime() / 1000000 - beginTime; //Calculate sleep time sleepTime = fps - (int) (timeDiff); if (sleepTime > 0) {//If sleepTime > 0 we're OK ((Timer)e.getSource()).setDelay(sleepTime); } } }); timer.start(); in gameLoop() characters are drawn to the screen ( a character holds an array of images which consists of their current sprites) every gameLoop() call will change the characters current sprite to the next and loop if the end is reached. But as you can imagine if a sprite is only 3 images in length than calling gameLoop() 40 times will cause the characters movement to be drawn 40/3=13 times. This causes a few minor anomilies in the sprited for some charcters So my question is how would I go about delivering a set amount of frames per second in when I have 2 characters on screen with varying amount of sprites?

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• Booting from e-sata drive

  - by petersohn

  I have a HP EliteBook laptop (don't know exact product number), which has an internal hard drive with Windows installed on it. I have an external hard drive with e-sata and USB ports, linux installed on it. When I try to boot from the external drive, it works if I use USB but not if I use e-sata. In the BIOS setup, I have the following boot order set: External SATA drive USB Hard Drive Notebook Upgrade Bay Notebook Hard Drive etc. When I boot from another drive (such as the internal hard drive or from CD-ROM), and have the e-sata cable connected, it works perfectly. Is there any way to boot from the e-sata drive?

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• Kernel Panic: Not booting after upgrade from 10.04 to 12.04

  - by Jitesh

  I upgraded from 10.04 to 12.04LTS. Upgrade went fine, even restarted couple of times. Then the next day while booting into Ubuntu, after the grub, it gave the error Kernel panic : not syncing vfs unable to mount root fs on unknown block (0,0). I then booted into live CD and tried the following commands, based on other posts on this forum: sudo fdisk -l As the 8 was on /dev/sda1, sudo mount /dev/sda1 /mnt sudo mount --bind /dev /mnt/dev Now I got the message: mount: mount point /mnt/dev does not exist Then tried sudo mount --bind /proc /mnt/proc Again got the message: mount point point /mnt/proc does not exist. then tried sudo chroot /mnt Got message: chroot: failed to run comman '/bin/bash': No such file or directory Now have no clue what to do next. Unable to boot into Ubuntu. Please help. Jitesh

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• missing NTLDR / no CD drive recognition

  - by Daems

  I formatted C: after installing win 7 on F: partition. on startup reported missing NTLDR changed boot seq to CD. only bleep sounds and failing boot. I could try to put the files on a USB stick and boot, but are there better options ?

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• Ubuntu 12.04.3 alongside Windows 8.1

  - by user208329

  I brought a new Notebook which has pre-installed Windows 8.1 with an uefi* (-Bios) and secure boot*. (* can switch or turn so off, still no success) When i try to install Ubuntu 12.04.3, the installer doesn't recognize Windows 8.1. There were options, to delete the whole disk or do something else. The second option, shows a few partitions (NTFS) but no Windows. The Ubuntu 13.10 version even did start on my notebook, it gets frozen during start up. (I thought. maybe the newer one will recognize Windows.) I'm not very confident in manipulating grub, I hope there is an easy way or an easy description. Gparted shows: Device Type Size Used /dev/sda freespace 1MB /dev/sda ntfs 1073MB 408MB /dev/sda2 efi 104MB 52MB /dev/sda3 ntfs 134MB 45MB /dev/sda4 ntfs 988465MB 23947MB /dev/sda5 ntfs 10424MB 9483MB free space 0MB /dev/sdb1 fat32 16929MB 9412MB (USB-drive Ubuntu-image)

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• Dual-booting Ubuntu and Pardus with GRUB2...Pardus no show?

  - by Ibn Ali al-Turki

  Hello all, I have Ubuntu 10.10 installed and used to dual-boot Fedora, but I replaced Fedora with Pardus. After the install, I went into ubuntu, and did a sudo update-grub. It detected my Pardus 2011 install there. When I rebooted, it did not show up in my grub2 menu however. I went back to Ubuntu and did it again...then checked the grub.cfg, and it is not there. I have read that Pardus uses a grub legacy. How can I get Pardus into my grub2 menu? Thanks! sudo fdisk -l Disk /dev/sda: 500.1 GB, 500107862016 bytes 255 heads, 63 sectors/track, 60801 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0xd9b3496e Device Boot Start End Blocks Id System /dev/sda1 * 1 15197 122067968 83 Linux /dev/sda2 36394 60802 196059757 5 Extended /dev/sda3 15197 30394 122067968 83 Linux /dev/sda5 36394 59434 185075308 7 HPFS/NTFS /dev/sda6 59434 60802 10983424 82 Linux swap / Solaris Partition table entries are not in disk order and update-grub Found linux image: /boot/vmlinuz-2.6.35-25-generic Found initrd image: /boot/initrd.img-2.6.35-25-generic Found memtest86+ image: /boot/memtest86+.bin Found Pardus 2011 (2011) on /dev/sda3 Yet after this, I go to grub.cfg, and Pardus is not there.

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• DSL modem problem in 11.10

  - by Misterious

  Earlier I used Windows 7 and the modem used to work absolutely fine. Even when it got disconnected it used to reconnect automatically without any trouble. But then I installed Ubuntu 11.10 on dual-boot and set up the modem connection properly but the modem now disconnects much more frequently (earlier it disconnected once in 5 hours or so and after Ubuntu in 5 minutes!). Also once disconnected, it does not reconnect even when I have checked the "Connect Automatically" button. I have to restart the system to reconnect it. I the clean installed Windows and modem works perfectly fine again. What is the reason for this and how can I solve this? I really want to use Ubuntu but due to this problem I can't.

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• Why isn't Grub2 using custom resolution?

  - by beanaroo

  I hope somebody can help me with this... Running Ubuntu 12.10 I am trying to get Grub2 to use a resolution of 1600x900... I have checked vbeinfo and hwinfo --framebuffer which both provide: Mode 0x037f: 1600x900 (+6400), 24 bits This resolution has worked on previous Ubuntu and Fedora installs. Here is my /etc/default/grub: http://paste.ubuntu.com/1308444/ Line 25 = GRUB_GFXMODE="1600x900" As well as my /boot/grub/grub.cfg: http://paste.ubuntu.com/1308446/ Line 72 = set gfxmode=1600x900 I have tried using grub-customizer: Why is it not taking effect?? I have tried different resolutions... Backgrounds and font colours are changeable. Thank you for your insight.

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• GRUB in MBR or Partition?

  - by MA1

  where should i install GRUB? MBR or Partition Boot Sector? What are the advantages and disadvantages of each approach? Also, if we install the GRUB in the Partition Boot Sector then how the boot process works?

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• GRUB error: unknown filesystem

  - by Ali

  I replaced my old laptop drive which was win7 and ubuntu dual boot with an SSD. Now I connected the old drive through a USB adapter and I want to boot from it. But this comes up: unknown filesystem grub rescue> As i need the programs from old drive I have to boot from it time to time and I don't want to install those software on the new drive. It takes so time to exchange the drives so I want to boot from USB. how can I fix this?

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• Update Grub on Squeeze - Kernel downgrade due VMware Server

  - by vodoo_boot

  Hi! I happen to run into various problems regarding grub and kernels. I don't really care about the kernel internas. All I want is VMware server in that dedicated root-server. 1.) What is a bzImage vs. vmlinuz? kaze:~# ls /boot/ System.map-2.6.32-5-amd64 bzImage-2.6.33.2 config-2.6.33.2 initrd.img-2.6.32-5-amd64 System.map-2.6.33.2 bzImage-2.6.35.6 config-2.6.35.6 vmlinuz-2.6.32-5-amd64 System.map-2.6.35.6 config-2.6.32-5-amd64 grub I updated my menu.lst (grub2): timeout 5 default 0 fallback 1 title 2.6.32.5 kernel (hd0,1)/boot/vmlinuz-2.6.32-5-amd64 root=/dev/sda2 panic=60 noapic acpi=off title 2.6.35.6 kernel (hd0,1)/boot//bzImage-2.6.35.6 root=/dev/sda2 panic=60 noapic acpi=off title 2.6.32.3 kernel (hd0,1)/boot//bzImage-2.6.33.2 root=/dev/sda2 panic=60 noapic acpi=off That doesn't do well... I think the vmlinuz file is missing initrd or so. Dunno. In fact I don't give too much about kernel boot voodoo as long as it works. update-grub(2) does not work. Does anybody know what magical trick there is to get the 2.6.32-5 booting? 2.) I thought t follow the Deban wiki.. I cannot get header-files for the installed 35.6 or 33.2 kernel in the repositories. I cannot build foreign headers because they will not match the running kernel. So how does one deal with that situtation? I'd prefer not to have to downgrade the kernel. Thanks for any answers!

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• How to reset settings when Unity won't finish booting?

  - by Emre

  I have a new 12.04 installation and I messed things up after trying to move /home to an NTFS partition, which I later learned was a bad idea. I removed references to the NTFS partition on fstab and created new users on the ext4 / partition. Now I can't get Unity to start up properly for any user. I get the GUI with only three Launch icons (none of which are clickable) and no bar at the top. The keyboard seems to the nonfunctional after I enter my credentials. The interesting thing is that I can boot when I go through recovery mode and select resume. I wonder whether I am creating the new users properly. What is the correct protocol for doing so in order to ensure that they can run Unity?

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• Rotate around the centre of the screen

  - by Dan Scott

  I want my camera to rotate around the centre of screen and I'm not sure how to achieve that. I have a rotation in the camera but I'm not sure what its rotating around. (I think it might be rotating around the position.X of camera, not sure) If you look at these two images: http://imgur.com/E9qoAM7,5qzyhGD#0 http://imgur.com/E9qoAM7,5qzyhGD#1 The first one shows how the camera is normally, and the second shows how I want the level to look when I would rotate the camera 90 degrees left or right. My camera: public class Camera { private Matrix transform; public Matrix Transform { get { return transform; } } private Vector2 position; public Vector2 Position { get { return position; } set { position = value; } } private float rotation; public float Rotation { get { return rotation; } set { rotation = value; } } private Viewport viewPort; public Camera(Viewport newView) { viewPort = newView; } public void Update(Player player) { position.X = player.PlayerPos.X + (player.PlayerRect.Width / 2) - viewPort.Width / 4; if (position.X < 0) position.X = 0; transform = Matrix.CreateTranslation(new Vector3(-position, 0)) * Matrix.CreateRotationZ(Rotation); if (Keyboard.GetState().IsKeyDown(Keys.D)) { rotation += 0.01f; } if (Keyboard.GetState().IsKeyDown(Keys.A)) { rotation -= 0.01f; } } } (I'm assuming you would need to rotate around the centre of the screen to achieve this)

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