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• System Error Report /usr/bin/Xorg

  - by jimirings

  I have recently begun getting a System Error Report message when I start up my computer. I haven't installed anything recently other than the usual updates or done anything else out of the ordinary. The details for the report just say "/usr/bin/Xorg". It doesn't seem to be causing me any problems beyond the annoying error message. I saw these questions regarding this problem: System Error Report - Xorg How do I enable or disable Apport? That's all dandy for getting the message to go away, but I'd rather fix the problem. Any ideas how I can make that happen? I'm running Ubuntu 12.04 on a Toshiba NB505. I am, of course, happy to provide any other relevant information that may be needed. Thanks in advance.

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• Terminal as desktop background instead of wallper

  - by Janis Erdmanis

  I have come to conclusion that all my needs from nautilus is satisfied with terminal and last file manager. It also dismisses the need for multiple nautilus instances, which makes mess when I forgot how I meant to use different workspaces. The next step for my simplification would be to get rid of any possibility to open nautilus. Also I thought that my interaction with computer is file centred, therefore it makes sense to leave file manager in background of applications. Are there any ways to make terminal as desktop background with which I could interact?

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• Installing gcc in Ubuntu 11.10

  - by Chi-Ping Lee

  I want to install gcc on my computer. To do this, I ran the following command: sudo apt-get install build-essential As this runs, it connects (or tries to connect) to the server tw.archive.ubuntu.com. But the server is not working. How can I fix this and get gcc installed? Note: the Taiwan mirror is down as of 2012-06-01 0352. See thread here. This pastebin contains the text of /etc/apt/sources.list, after changing from tw.archive.ubuntu.com to the main server.

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• Creating practically solvable 15 puzzle inputs

  - by Ashwin

  I am now developing a 15 puzzle game. I know the method to detect unsolvable puzzles. But unlike 8-puzzle, solution for 15-puzzle takes quite long time for some input states and can be solved within 5 seconds some other set of input states. Now the problem is that I cannot give the user(the player), a problem for which the solution takes more than 10 seconds(if he/she chooses to see the solution). So what I want is that when I initially shuffle the puzzle, I want to only present those puzzles which can be solved within 10 seconds. There must be some way to determine the hardness of the puzzle. I tried searching the net but could not find it. Does anyone know a way of determining the hardness of a puzzle? NOTE : I am using A* algorithm to find out the solution on a computer with 3GB RAM and 2.27GHZ processor.

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• How to describe the profession [closed]

  - by Michael Kjörling

  Possible Duplicates: How to explain programming to a non-programmer? Getting non-programmers to understand the development process I was asked a question today that made me think. Here's a middle age person who apparently knows nothing about computers besides this specific application they use (I actually suggested to use Calculator, rather than hunt around the whole office for a hand-held one which had mysteriously vanished, and the fact that the computer could be used for such tasks was apparently news), asking me to explain what programming is about. In general. I tried, but am not sure I managed very well. But it got me thinking. What would be a good way to describe programming, or more generally speaking systems development, to a person like that? How have you responded being put in a similar situation?

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• Unable to boot either Ubuntu or Windows after kernel panic

  - by Josh Taylor

  Hi, Today I have been unable to boot into my Ubuntu (10.10) or Windows (7) partition. Ubuntu kernel panics on boot with the error: init: hash.c:296: Assertion failed in nih_hash_search: hash != NULL I can boot into a LiveUSB environment, and from there can access all my files on my 3 partitions (1 ext4, 2 NTFS). I have also ran fsck on the ext4 partition and ntfsfix on the 2 NTFS partitions, both not finding any errors at all. And Grub is intact and have also tried a reinstall of it. So at the moment I'm currently stuck using a LiveUSB, and would like to see if there are any other options other than reinstalling. Thanks. Update I've now ran chkdsk using my Windows recovery disk, and it found errors and fixed them, but I am still unable to boot into either Windows or Ubuntu Update #2 I've decided to just re-install Ubuntu and start again as I didn't really want to spend any more time looking around whilst I need this computer for work. Thanks for all your help though.

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• Learning to optimize with Assembly

  - by niktehpui

  I am a second year student of Computer Games Technology. I recently finished my first prototype of my "kind" of own pathfinder (that doesn't use A* instead a geometrical approach/pattern recognition, the pathfinder just needs the knowledge about the terrain that is in his view to make decisions, because I wanted an AI that could actually explore, if the terrain is already known, then it will walk the shortest way easily, because the pathfinder has a memory of nodes). Anyway my question is more general: How do I start optimizing algorithms/loops/for_each/etc. using Assembly, although general tips are welcome. I am specifically looking for good books, because it is really hard to find good books on this topic. There are some small articles out there like this one, but still isn't enough knowledge to optimize an algorithm/game... I hope there is a modern good book out there, that I just couldn't find...

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• Screen split oddly when OS is installed from a Live CD

  - by Brian

  Never used Linux before but I decided I want to start somewhere and Ubuntu seemed like the right place to start. I burned the 64bit version ISO onto a CD and installed it onto a fresh new hard drive I have. The Live CD works and the Live Distro thing works great. However when I attempt to install it, the screen splits oddly in a way where part of the right is on the left. Furthermore, after attempting to log in, the GUI doesn't show up and the computer would freeze and stay that way. However you can still move the cursor. I can't really get in or do anything (possibly because I don't know how) and tinker around since I am not too tech savvy. But I can follow instructions. Graphics Card Radeon hd 6670 I just tried the install with windows thing. There was the exact same problem.

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• How to create a restricted SSH user for port forwarding?

  - by Lekensteyn

  ændrük suggested a reverse connection for getting an easy SSH connection with someone else (for remote help). For that to work, an additional user is needed to accept the connection. This user needs to be able to forward his port through the server (the server acts as proxy). How do I create a restricted user that can do nothing more than the above described? The new user must not be able to: execute shell commands access files or upload files to the server use the server as proxy (e.g. webproxy) access local services which were otherwise not publicly accessible due to a firewall kill the server Summarized, how do I create a restricted SSH user which is only able to connect to the SSH server without privileges, so I can connect through that connection with his computer?

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• I am not able to boot into window 7 after ubuntu 12.04 installation

  - by user91878

  not able to boot into window 7. I am naive in ubuntu usage. Pls guide immediately. The following link a got after boot repair. http://paste.ubuntu.com/1218634/ full message is as follows: you can now reboot your computer. Please do not forget to make your BIOS boot on sda (500GB) disk! The boot files of [The OS now in use - Ubuntu 12.04 LTS] are far from the start of the disk. Your BIOS may not detect them. You may want to retry after creating a /boot partition (EXT4, 200MB, start of the disk). This can be performed via tools such as gParted. Then select this partition via the [Separate /boot partition:] option of [Boot Repair]. (https://help.ubuntu.com/community/BootPartition)

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• Connectify Dispatch: Link All Your Network Connections into a Super Pipeline

  - by Jason Fitzpatrick

  Connectify Dispatch is a network management tool that takes all the connections around you–Ethernet, Wi-Fi nodes, even 3G/4G cellular connections–and combines them into one giant data pipeline. At its most simple, Connectify Dispatch takes all the network inputs available to your computer (be those connections hard-line Ethernet, Wi-Fi nodes, or cellular connections) and merges the separate data connections seamlessly into one master connection. If any of the connections should falter (like your 3G reception goes out), Connectify automatically shifts the data to other available networks without any interruption. In addition you can specify which network Connectify should favor with connection prioritization; perfect for using your cellular connection without breaking through your data cap for the month right away. Hit up the link below to read more about Connectify Dispatch and the companion app Connectify Hotspot. Connectify Dispatch Secure Yourself by Using Two-Step Verification on These 16 Web Services How to Fix a Stuck Pixel on an LCD Monitor How to Factory Reset Your Android Phone or Tablet When It Won’t Boot

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• Xubuntu is not seeing my Win8 OS in the installer

  - by Logan Serman

  When I install Xubuntu, I get the message "This computer currently has no detected operating systems. What would you like to do?". I just did a fresh install of Win8 yesterday, and I guess it used EFI because I have a 104MB partition that is of type 'efi'. Is there any way to install Xubuntu next to Win8, and avoid any boot problems? Or can I switch Win8 to BIOS from EFI, without having to re-install Windows? I went through a ton of boot problems and re-installing yesterday... I really don't want to have to do it again.

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• Ubuntu on a virtual machine

  - by Barry Miller

  I've installed Virtual Box and am trying to install Ubuntu 12.04 from a downloaded ISO. Everything is going fine but I come to a choice that says no operating system is dectected on this machine, what would you like to do? 1)Erase disk and install Ubuntu (this will erase any files on the disk) or 2) Something else (choose partition size, multiple partitions, etc). Does the first option mean erase all files on the VIRTUAL DISK--NOT THE COMPUTER? Is it just talking about the virtual machine or if I select this option will it erase my Windows operating system and other files on my hard drive?

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• The Best Articles for Backing Up and Syncing Your Data

  - by Lori Kaufman

  World Backup Day is March 31st and we decided to provide you with some useful information to make backing up your data easier. We’ve published articles about backing up various types of data and settings both offline and online. There’s all kinds of settings on your computer to backup in addition to your personal data, such as Wi-Fi passwords, drivers, and settings for programs like web browsers, Office, and Windows Live Writer. There are also many tools available to help you keep your data and settings backed up. Make Your Own Windows 8 Start Button with Zero Memory Usage Reader Request: How To Repair Blurry Photos HTG Explains: What Can You Find in an Email Header?

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• Wrong audio volume at boot

  - by skerit

  When I boot my computer and login the volume level is always way too loud. Unfortunately the only way to change it is a physical knob on my speaker. As soon as I can change the volume using my keyboard the volume immediately drops. Say the volume is at 100%, as soon as I turn the dial on my keyboard a little bit it drops to a normal level like 40% How do I get this to work in a clear way, like having it remember the audio level it was on at shutdown? Here's my audio card model: 82801JI (ICH10 Family) HD Audio Controller An Intel card on a Asus motherboard

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• How to restart upgrade (from 11.04 to 12.04)

  - by Konoppo

  Yesterday I was making upgrade (from 11.04 to 12.04) when I have got power failure. I don't known where the installer was, because I wasn't in the front of computer at that moment. After restart Ubuntu started to version 12.04 and everything looks OK. But - I'm not sure if everything was installed correctly? How can I check it or how can I "restart" my automatic upgrade tool to do everything again and "to the end"? Some more infomations: lsb_release -a: No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 12.04 LTS Release: 12.04 Codename: precise uname -r: 3.2.0-24-generic apt-get found five updates: linux-headers-3.2.0-24 linux-headers-3.2.0-24-generic linux-image-3.2.0-24-generic linux-libc-dev ubuntu-docs unity-scope-musicstores

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• Upgraded to 11.10 lost personal folders, Ubuntu one shows no files

  - by Kevin

  Upgraded to 11.04, from 10.10 system would only come up in terminal mode, but it told me that an additional upgrade was available and did I want to do that. Foolishly thinking that might fix the problem, I said yes. This time it did not make it all the way through the upgrade, when I came back to the computer over an hour later, the screen was filled with an error message "could not open display", had to reboot. Went to recovery mode on reboot to install nvidia module, when I rebooted system came up fine, but without carrying over my personal folders, I have the home folder, but no personal named folder in it. Came to Ubuntu One, but gives error message; File Sync error. (org.freedesktop.DBus.Error.NoReply: Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked Is the a way around this in order to restore my files? I know my files existed on Ubuntu one as of a few months ago.

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• What is missing and should be added to Code Complete 3rd Edition? [closed]

  - by Peter Turner

  It's been quite a few years since Code Complete was published. I really love the book, I keep it in the bathroom at the office and read a little out of it once or twice a day. What developments in computer software... development need to be added to Code Complete 3e, and for the sake of reductionism, what should be removed to make room for them? Is it necessary even possible to call Code Complete Code Complete if it doesn't have language features that even Delphi has like anonymous methods and generics? Also, what languages would be more appropriate than C++ to use for a majority of code examples?

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• Consoles in Ubuntu and automatic upgrade

  - by Muhammad Khan

  So I recently discovered that ubuntu is simultaneously running 6 consoles in addition to the GUI that everybody uses, which can be accessed by pressing Ctrl+Alt+F1 ... +F6 and then the default GUI with Ctrl+Alt+F7. What use can these consoles have when I can just open a terminal in the GUI mode? Also, why is having consoles like this advantageous for computer users; wouldn't a GUI be much more simplistic? Also, running the console told me that I was running a development version of Ubuntu Quantal which is version 12.10. The login screen (correctly?) says that I'm running 12.04 LTS. What does that mean? Thanks everybody!

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• Ubuntu doesn't give the intended screen resolution

  - by JMCF125

  I have recently created a Ubuntu 12.04.2 64 bit virtual machine on VirtualBox, and I am not very used to Linux (I used Linux Mint for a few weeks some time ago), so please refer the full name of stuff, not just "the what-not-command". The problem is I can't set the full resolution my computer supports (I think it is 1366 by 768), I have found similar questions and tried most of the respective solutions, thy did not work. If I type xrandr to the terminal I get: xrandr: Failed to get size of gamma for output default Screen 0: minimum 640 x 480, current 1024 x 768, maximum 1024 x 768 default connected 1024x768+0+0 0mm x 0mm 1024x768 61.0* 800x600 61.0 640x480 60.0 As you can see, the maximum is too low. And in the settings of the screen (I mean, with GUI) only 1024x768 and 800x600 appear. I don't remember exactly which answer of those questions, but it was one in the terminal (again, with xrandr) that made the resolution I wanted appear (although it gave an error when selected, not even changing to the 1366x768 resolution first and then back to 1024x768).

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• 12.10 does not boot sometimes from the hard drive, but it does consistently from the CD

  - by Robert

  I have recently switched from Windows 7 to Ubuntu 12.10. I have installed Ubuntu 12.10 and I cleared everything from my computer, but it randomly stops at different screens. Only a purple screen comes up. I can choose Ubuntu from a list and a blinking white dot appears in the top left corner. The previous things happen and the Ubuntu login screen appears an I can log in. It is random. and I have not changed anything. I can always insert the bootable CD and it will work every time.

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• How do I remove SUN Java and use OpenJDK instead?

  - by Adel Ramadan

  As a programmer I use java for learning to code in Netbeans. I installed Sun java 6 long time ago over openJDK that came with my ubuntu just cause it seemed more responsive... Now that oracle left the repos I wanted something easy to handle to install and uninstall, so I want to Remove completely sun java 6 from my computer and set as default OPENjdk....and openjre. I already have installed OpenJDK and OPENjre...but not marked as default. Besides I want to clean Sun java from here, dont wanna get messy ^^. Running ubuntu 11.10

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• Print Your Favorite Video Game Character in 3D

  - by Jason Fitzpatrick

  Beloved video game characters of yesterday are perfect candidates for 3D printing with their simple and block-based sprite shapes. Read on to learn more about the process and mathematics of turning 2D sprites into 3D models. Courtesy of Mikola Lysenko, a computer scientist and mechanical engineer, we’re treated to not just a tutorial on how to create a 3D shape from a 2D seed image, but the mathematics behind figuring out exactly what that 2D sprite should look like if stretched out into three dimensions. Hit up the link below for his tour of techniques including multiview stereo reconstruction and space carving (and why he went with one technique over the other)–the explanation of his process is just as interesting as the cool results it yields. Turning 8-Bit Sprites into Printable 3D Models [via Hack A Day] How To Create a Customized Windows 7 Installation Disc With Integrated Updates How to Get Pro Features in Windows Home Versions with Third Party Tools HTG Explains: Is ReadyBoost Worth Using?

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• Ubuntu server 13 hangs on boot

  - by Slava Fomin II

  I formatted my WD30EFRX 3TB SATA HDD as GPT with the following layout: 200 MB FAT32 (BOOTABLE) 50GB EXT4 (Mount point: /) 4 GB SWAP SPACE ~2.9 TB EXT4 (with no mount point) Then i created a Flash USB using Rufus 1.3.3 and the following ISO-image: ubuntu-13.04-server-amd64.iso. I used following configuration to create the USB: GPT partition scheme for UEFI computer FAT32 (16KB) I successfully booted from this USB on my Intel D510MO motherboard in UEFI mode (there were a black and white boot loader menu instead of a colorful GUI) and installed the OS. During the boot loader installation i saw it was grub-efi-amd64 as it must be. After installation i removed the flash drive and tried to boot the system, but just after a BIOS POST it hangs (there is a white blinking cursor at the left top corner of the black screen) and nothing happens. UEFI Mode is enabled in the BIOS configuration and i've updated the BIOS to the latest firmware. What went wrong, how i can confirm that system was installed properly? How can i boot the OS?

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• What to do?! Upgrading from 12.10 to 13.04 failed :(

  - by Jon Ramirez

  I got an update reminder to go from 12.10 to 13.04. I followed the instructions, was able to download the package, and started installing. Up to a point where my computer (seemed to) restart and there was just a black screen (with the backlight on) for more than an hour. Then I decided that this was too long for an installation and forced my laptop to shut down. I think that messed it up. Now I'm stuck in what seems to be 13.04 with bits of 12.10 in it. I tried to upgrade again through software updater but it goes to Partial Upgrade. But when I try that, I get this error message: "An upgrade from 'raring' to 'quantal' is not supported by this tool." Help! What should I do! I'm running my Ubuntu on my Dell Inspiron.

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