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• Performance cost of running Ubuntu from external hard drive

  - by dandan78

  A friend just complained to me about Ubuntu being slow. Although I've noticed a certain lack of snappiness with Linux vs Windows in the past, I really can't say I've had much to grumble about with the recent distributions of Ubuntu. That said, his objections seem much worse than the ones I used to have and I know that his current setup is significantly more powerful than my laptop. And then it turned out he is running Ubuntu off an external HDD hooked up via USB2.0. The HD enclosure is USB3.0 but apparently he can't manage to get it to boot on USB3.0 so he switched to one of the USB2.0 ports or whatever and that works, albeit not very well. Now I would expect USB to add some overhead to communication between the computer and the HDD; SATA is after all designed to get the maximum out of a hard drive, whereas USB is, well, universal. What are your expreriences with booting off external HDDs? Edit: Does anybody know just how much of a slowdown can be expected?

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• How can I build the best Cyber Cafe possible using Ubuntu (Desktop or the Server Edition)?

  - by Osman Hassan

  My question has to do with my plan/dream of opening a Cyber Cafe in Mogadishu, Somalia, my birth place. I plan to use 5 to 15 computers (all laptops) running Ubuntu. Now that you have the background to my question, I need your help, advice and expertise. What type of computer (laptop) should I use for this project? What type of operating system (Ubuntu Desktop/Ubuntu Server Edition) should I use? How can I setup a file and printer sharing server? What program should I use to manage the client computers? If you have done this before and can point me to the best and easiest way to build this Cyber Cafe, I would appreciate it tremendously. Also, if you can point me to any books, articles, or blogs which I should read, I would appreciate it too.

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• Suspend after delay via SSH

  - by thornate

  I know how to suspend after a delay by using: echo 'pmi action suspend' | at now + 1 minutes However, that only seems to work as long as I keep the console window open. Am I correct in assuming that the at commands are cleared when I close the console? This is an issue as I want to be able to log in to my computer via SSH, send the suspend command, then log out before it happens. Suspending immediately tends to freeze my local console window, which is inconvenient. Is there a way to send a delayed suspend command without it being cleared when I log out?

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• Samsung NP305U1A laptop won't resume from suspension

  - by Oskar Pålsson

  I just bought a Samsung NP305U1A laptop and installed Ubuntu Desktop 12.04 LTS on it. Whenever I suspend the computer and try to wake it back up, the monitor only shows a black screen and the only thing I can do is a hard reset. Kernel: 3.2.0-24-generic Graphic: Radeon HD 6320 Anybody know what to do? UPDATE I did some some research and remebered that I installed the "ATI/AMD proprietary FGLRX graphics driver" from the "Additional drivers" software bundled in Ubuntu. I also tried to install the "ATI/AMD proprietary FGLRX graphics driver (post-release updates)" but whenever I do, it gives me an error and I can't continue So I decided to make a clean install of Ubuntu 12.04 again and when i tried the suspension out-of-the-box, it did work. But since I can't install the drivers I need, HD video is choppy like hell. So perhaps the suspension bug was fixed in the post-release updates of the driver, but sadly I cannot install them, and I don't know why.

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• Install Ubuntu and erase Windows Vista

  - by miguel

  I have an older laptop with a ADA hard disk I can't really buy a new one so I want to erase Windows Vista on my computer and only have Ubuntu so that I can have more space. How do I make it go directly to my blank CD? My Windows Vista is messed up and I can't even get into it. I want to download the new version of Ubuntu while in Ubuntu. I downloaded it but it didn't go directly to the blank CD. I tried to copy all of Ubuntu onto the CD once it was downloaded but it says there was an error while copying. What should I do?

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• Storage and BackUp Strategies

  - by Chandra Vennapoosa

  Many of us are familiar with backing up our data.  While it sounds pretty simple, the fact is that most of the computer users do not backup their data. Some of the excuses which they often make involve how long it takes, how slow it is, or how many DVDs or disks they need. However, once disaster strikes, the loss that you will suffer by not having your data backed up can be very severe. Topics Introduction What is an Online Back Up? Online Back Up Strategies Implementing Disaster Avoidance Implementation and Storage Security Issues to Consider Reader complete article : Storage and BackUp Strategies

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• How To Use Google Authenticator and Other Two-Factor Authentication Apps Without a Smartphone

  - by Chris Hoffman

  Google, Dropbox, LastPass, Battle.net, Guild Wars 2 – all these services and more offer two-factor authentication apps that work on smartphones. If you don’t have a supported device, you can run an alternative application on your computer. When you log in, you’ll need to enter a time-based code from the app. Two-factor authentication prevents people who know your password – but don’t have the app and its security key – from logging in. How To Delete, Move, or Rename Locked Files in Windows HTG Explains: Why Screen Savers Are No Longer Necessary 6 Ways Windows 8 Is More Secure Than Windows 7

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• SharePoint 2010 Hosting :: HTTP Error 503. The Service in Unavailable.

  - by mbridge

  Error Message: HTTP Error 503. The service in unavailable. The application pool is shutdown and the Event Viewer indicates: Log Name:      Application Source:        Microsoft-Windows-User Profiles Service Date:          4/24/2010 4:58:28 PM Event ID:      1500 Task Category: None Level:         Error Keywords: User:          GUERILLA\spapppool Computer:      SPS2010RTM.guerilla.local Description: Windows cannot log you on because your profile cannot be loaded. Check that you are connected to the network, and that your network is functioning correctly. DETAIL – Unspecified error Solution: Option 1 – Log on locally with the service account once to create a local profile for it. Option 2 - Modify the application pool by going into IIS > Application Pools > Right-Click offending app pool > Advanced Settings > Set “Load User Profile” to False. Give it try!! Good luck!!

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• How to install Pear Linux's shell in Ubuntu?

  - by Emerson Hsieh

  For people who doesn't know what Pear Linux is: Pear Linux is a French Ubuntu-based desktop Linux distribution. Some of its features include ease-of-use, custom user interface with a Mac OS X-style dockbar, and out-of-the-box support for many popular multimedia codecs. Excerpt from Distrowatch. When this Linux Distribution came out, I immediately went to the website and found out that Pear Linux is actually Mac OSX with a pear. I was going to download it and install Pear Linux as a triple-boot on my computer (Windows and Ubuntu installed). Then I remembered that Pear Linux is Ubuntu based. So I thought of a better Idea of installing only the Comice OS Shell in Ubuntu(the Desktop environment of Pear Linux), so that I can select that in the login screen. Is that possible? EDIt: Found this.

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• Absolutely Nothing Apearing in "Additional Drivers"

  - by Joshua Arroyo

  OK so I just got Ubuntu the other month or so. I'm running the 11.04 version currently and trying to install drivers for a Nvidia graphics card (it's my brother's computer and he currently cannot find the number of the card right now). I read that, to install the proper drivers for gaming, I would need to go into "Additional Drivers" and choose them myself. I clicked to go into "Additional Drivers" and it searched "for available drivers", then opened the additional drivers list. Lo and Behold, there was nothing, simply the message "No proprietary drivers are in use on this system" and the Help and Close buttons. Sorry if there's some silly simple answer to all of this, I'm new to this sort of thing (used to Windows simplicity, lol) and I really don't know what to do. Help would be much appreciated. Also, I should mention that the graphics card was installed and ran fine before switching from Windows XP to Ubuntu.

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• How to manage two video cards on a laptop that runs Ubuntu 10.10?

  - by Marc-François Cochaux-Laberge

  I have a laptop with two video cards. One ATI and on integrated Intel. On Windows, I can choose which video card I want to use. For example, I use the Intel card for normal use and for gaming, I switch to my ATI card for better performance, but a shorter battery life. In Ubuntu 10.10, only the Intel driver is installed, the ATI driver for my card doesn't work at all and there's heat coming out of my computer all the time, like when I'm playing video games on Windows. I think both cards are active, but only the Intel one is usefull. How can I solve this by making sure Ubuntu is aware of the two video cards and by disabling my ATI. Or may be I am all wrong about this?

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• How to play Minecraft Classic?

  - by djeikyb

  First off, I've read through this question: How to install minecraft?. I'm interested in the free web-embedded version (for demo purposes), not the paid and downloaded .jar file. I removed the open-java whatever that Ubuntu prefers to use. I installed sun-java6-jre. Then I ran sudo update-alternatives --config java to ensure I was using Sun's Java. Restarted my browsers, then tried to start the game from: http://www.minecraft.net/play.jsp It pops a prompt to make sure I really want to allow direct interaction between minecraft.net and my computer, I agree. The in browser display mumbles something about loading a library, then darkness. The page doesn't crash, ps shows the java plugin process, all seems well except the game doesn't load. I see the same behaviour on Chromium 11.0.662.0 (73963) as Firefox 4 RC1.

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• Launch a real install of Ubuntu already on another hard-drive in Windows 7 like a VM

  - by Chad M

  I'm not too familiar with VMs and the like so this may not even be possible. Here is what I have: A real, full install of Windows 7 on hard drive A. A real, full install of Ubuntu 10.04 on hard drive B. Grub allowing me to select what I want to launch when I start up my computer. It would be Amazing if I could do one of two things. Within Windows 7, launch my real install of ubuntu as if it were a VM. That means i would get all the installed software, all of the files, and all of the settings. Launch a VM copy of ubuntu 10.04 but some how make it use all of the installed software and settings from my real copy. Thanks!

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• Game Engines with real time lighting

  - by Maik Klein

  I am studying computer graphics since 3 semesters and we just started with OpenGL. I really enjoy it and want to create my own little engine for learning purposes. I already read tons of different forum posts and saw the following engines. Panda3d, Ogre3d, NeoAxis, Irrlicht and Horde3d(graphics only). Now I don't want to use something like Unity or CryEngine because I want to start more low level. Which of those engines is suited for real-time rendering? Something that CryEngine offers - no baked lightmaps. Or at least gives me the option to add a real-time renderer?

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• How do I change the language via a terminal?

  - by McGee

  Using system settings I changed my language to Arabic and deleted the English language from the settings. Then the computer lagged and it logged out - now I can't log back in because the login is in Arabic. So is there a way to default my language via terminal, default the login password language, or login via terminal which is still in English. I only have access to guest and a terminal. I changed the pasword to something that could be translated into arabic http://www.psychocats.net/ubuntu/resetpassword - then loged in and used system settings to default.

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• Thoughts on Development using Virtual Machines

  - by J_A_X

  I'll be working as a development lead for a startup and I've suggested that we use VMs for development. I'm not talking about each developer having a desktop with VMs for testing/development, I mean having a server rack where all VMs are managed and have the developers work from a microPC (ChromeOS anyone?) locally, or even remotely from their home computer. To me, the benefits are the fact that it's extremely scalable, cheaper in the long run, easier to manage and that we utilize the hardware its maximum potential. As for cons, I can't think of any particular showstoppers other than we'll need someone to setup/maintain said setup. I was hoping that some of you might of had a similar setup at your place of employment and be able to weight in with your opinions. Thanks.

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• Typing tutor games with good playablity

  - by matt wilkie

  Are there any linux typing tutor games which are enjoyable games in their own right? I'm a computer professional, but have never learned to type properly. I also don't want my kids to pick up my bad habits! The kids are okay with TuxTyping, for a time. Something like Typing of the Dead sounds great, but is Windows only, and as far as I can tell one of a kind. I also don't want the young'uns hooked on first person shooters just yet. So are there any quality typing games for a range of ages?

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• Star Wars Roguelike Combines Star Wars and Old School ASCII Adventures

  - by Jason Fitzpatrick

  Mashup ASCII-based adventuring, Star Wars, and some sweet light saber sound effects, and you’ve got this old-school in-browser adventure game: Star Wars Roguelike. Play a Jedi or Sith and move about the ASCII world with simple keyboard commands. You’re not going to be blow away by the photo-realistic graphics, but you are going to be able to play it on your aging work computer. Hit up the link below to take the game for a spin. Star Wars Roguelike [via Boing Boing] How To Boot Your Android Phone or Tablet Into Safe Mode HTG Explains: Does Your Android Phone Need an Antivirus? How To Use USB Drives With the Nexus 7 and Other Android Devices

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• Some Insight on the Field of Knowledge Representations and Reasoning

  - by picmate

  I started following an MS in computer sciences after about two years of work for a software company. I worked primarily in data warehousing and business intelligence related software development during my previous occupation. There is a high chance for me to select a research in knowledge representations, ontologies and reasoning, as there are no other research available in any other interesting fields, such as pattern recognition and navigation. I developed an interest towards knowledge representation with what I learnt from the courses I am taking currently. But I do not have a deep understanding of it in terms of which areas such a field would have an impact in a real life scenario, and how it will help me when I am hunting for a job in the near future. Some thought about this would be greatly appreciated.

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• 12.04 Random sounds sometimes after startup

  - by Timothy Duane

  I'm not quite sure what the sound is, but it has only started happening in the last two days. The only way I can describe it would be that it sounds like a wooden xylophone being tapped lightly. It will play at random intervals ranging between 1 second to a couple minutes for up to a half hour (from what I have noticed) after startup. If anybody has any ideas as to what is causing this or how to fix it I would appreciate it. System information: Computer: Toshiba Satellite L655-S5160 Audio Driver: Conexant Audio Driver(v4.119.0.60; 07-14-2010; 41.89M)

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• I can't get Ubuntu installation to start

  - by tyler

  I have a computer with the following configuration: AZUS Sabertooth Motherboard Intel I5 2500 CPU Windows 7 installed I'm trying to install linux. I first attempted to install pin guy. I burned the ISO, booted from it, got the initial menu; attempting to either run the live version from DVD, or install to system. However the process stops at a blank screen with the blinking cursor in left corner. So I downloaded Ubuntu and got the same results. Then I tried wubi and ended up in the same position. EDIT: UEFI might be part of the problem? Based on the link below I have determined that the process will be too time consuming and or risky so I'm giving up. https://help.ubuntu.com/community/UEFIBooting

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• How can I break out of ssh when it locks?

  - by Wayne Werner

  Hi, I frequently ssh into my box at home from school, but usually when I change classes and my computer suspends, the pipe will be broken. However, ssh simply locks up - ^c, ^z and ^d have no effect. It's annoying to have to restart my terminal, and even more annoying to have to close and re-create a new screen window. So my question, is there an easy way to make ssh die properly (i.e. when the pipe fails "normally" it will exit with a message about a broken pipe)? Or do I have to figure out what the PID is and manually kill it? Thanks!

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• Installation automation

  - by Denis Gorbachev

  Use case: When I install Ubuntu on another computer, I need to: install all the packages that I use; make some config changes; svn checkout some projects; git clone some projects; setup .ssh/config; download a custom Eclipse build; download some additional Eclipse plugins; make many other tweaks. So, I want to run a script, like sudo install-everything-needed, that would execute these predefined actions. Is there any package that provides the backbone for such system?

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• Moving around/avoiding obstacles

  - by János Harsányi

  I would like to write a "game", where you can place an obstacle (red), and then the black dot tries to avoid it, and get to the green target. I'm using a very easy way to avoid it, if the black dot is close to the red, it changes its direction, and moves for a while, then it moves forward to the green point. How could I create a "smooth" path for the computer controlled "player"? Edit: Not the smoothness is the main point, but to avoid the red blocking "wall" and not to crash into it and then avoid it. How could I implement some path finding algorithm if I just have basically 3 points? (And what would it make the things much more complicated, if you could place multiple obstacles?)

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• How can I get data off of a (probably) very corrupt drive?

  - by Mercury1964

  So, my younger brother wanted my help today. Apparently, he was helping a friend install Ubuntu to his laptop, and midway through the install (on a filled hard-drive with Windows 8, from the liveusb thing): 1) They realized that they had chosen "Erase and install" accidentally and decided the best course of action was to (in the middle of an install, remember) 2) Force shutdown the computer. After I had replaced my eyeballs back into their sockets, my bro asked if I could do anything about his friend's data, which he wanted back. This, however, drifts out of my normal comfort zone. I know this about the install: 1) It was on a fairly new Windows 8 laptop, so it had whatever filesystem it uses nowadays on the entire drive 2) They didn't choose the "zero out drive data" option 3) They stopped the install at some point (not sure if before or after wipe) I can imagine that it now has two corrupted filesystems on it (whatever Windows 8 was on and ext3) and that some of the data still exists (assuming it wasn't overwritten already). Is there anything that can be done for whatever data is left on the drive?

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