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• How to build a dynamic grub on a usb-drive?

  - by 13east

  I would like to setup GRUB on a USB where it detects automatically the available OS installations on the machine that it is plugged into. This could be useful if you messed up your default GRUB menu on a computer and would like to boot into the machine w/out booting Live-OS. Or if you have multiple Live-OS installations on a USB-Drive and would like to add/remove different installations w/out needing to update grub manually. I know that Grub2 has a OS-prober feature that looks for other installations on the hard-drive, but will that work in either of the scenarios listed above?

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• About languages strongly typed with late binding, do they make sense?

  - by llazzaro

  I never learnt anything about VB6 (and I dont want to) but I wanted to search for bad things in computer software, so my first though was VB6. So for example, VB6 was strongly typed with late binding. Makes some sense to have a language with that combination? (I dont think so). I want to know reasons of why VB6 was like this! or why is good idea for a lenguage to be like this. Bad things that happend with a lengugage like this? good things?

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• How To Remotely Copy Files Over SSH Without Entering Your Password

  - by YatriTrivedi

  SSH is a life-saver when you need to remotely manage a computer, but did you know you can also upload and download files, too? Using SSH keys, you can skip having to enter passwords and use this for scripts! This process works on Linux and Mac OS, provided that they’re properly configured for SSH access. If you’re using Windows, you can use Cygwin to get Linux-like functionality, and with a little tweaking, SSH will run as well.What is a Histogram, and How Can I Use it to Improve My Photos?How To Easily Access Your Home Network From Anywhere With DDNSHow To Recover After Your Email Password Is Compromised

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• Programming a trading strategy

  - by Rob

  Excuse me if I'm not descriptive enough, as I do not have much of a background when it comes to these things: How would I go about coding a primitive trading strategy and link it to some sort of artificial trading environment? Where do I start, and what are some other essential questions I should be asking? I am interested more in doing this because it interests me than making returns. Ideally it utilizes random/historical market data and doesn't actually execute any real trades. My background: I'm almost done my undergrad degree in computer science, and have had intro finance and economic courses. Familiar mostly with C and Java.

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• How do I fix this half screen problem?

  - by link1275

  I just installed 12.04, and my entire screen is being displayed entirely on the top half of my screen. The bottom half is always black or some technical garbage from the boot up. To interact with the bottom half of the screen I have to move the mouse over the screen to pull part of the bottom half of the screen on top and vice-versa. Does anyone know how to fix this? Also my computer told me, at startup, to go to here: http://wireless.kernel.org/en/users/Drivers/b43#devicefirmware.

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• BIOS Always Freezes Instantly

  - by Louis

  I'm not sure if this is necessarily a Ubuntu question, but I've only had the problem since I installed 12.10. When I turn my computer on, the BIOS screen comes up as usual and... nothing else. When I press any key, I hear a loud beep and there's no response. I've tried looking for similar problems, but in most cases people are at least able to interact with their BIOS even if their OS doesn't load. It seems as though it's just completely freezing as soon as I turn it on.

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• How to debug Android App Eclipse?

  - by user2534694

  Ok. So while this isnt a programming question. I wanted to know how do people debug apps? How do you view log cat, and where these exceptions are thrown etc? And do I need to run the app on the emulator to see all the stuff, or is there a way to view this after running the app on my phone(while not being connected to the computer) Links to plugins and tips would be really helpful, as im gonna start work on my next game, and while the first one works fine, had a lot of problems while debugging.

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• Using an external hard drive as a server and be able to connect via wifi [on hold]

  - by user289228

  OK, so i have an old external HDD(seagate 1tb) and a windows computer just in case but im trying to set it up as a server for my home at the moment but if everything goes right i want to transfer it to being a database hub for the business i work for that way i can have more then one register at a time on the same basic database. The thing is im new to the whole server part along with im not well versed with ubuntu either so what im getting at is if i can get it setup, can i connect it on ubuntu and run a linux based Point of sales program but have multiple linked to the single server? i may be able to do it via the router, i think its a belkin n600 with usb port but at this moment i dont know what it is since im not home. i just need information if this is possible and if so, a guide would be appreciated.

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• After one has made many grid based puzzles how does one make then into a PDF ready for printing

  - by alan ross

  After one has generated many grid based puzzles like sudoku, kakuro or even plain crosswords and now one has to print them in a book. How does one make a pdf (book file) from them automatically. To explain the question better. One has the puzzle ready in computer format like ..35.6.89 for all nine rows. The dot being the empty cell. How does one convert then to a picture on a PDF page complete with box, automatically without doing them individually and then print a book from the pdf file. As can be seen there are other things also printed on the page all this is done automatically.

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• Not detecting HDD after installing Ubuntu 12.04!

  - by Arthur

  After installing Ubuntu 12.04, which I'm using right now and it works great, my extra hard drive was detected the first time I turned on my computer but then it does not show anymore on my Home Folder, when I run the Disk Utility says that has a few errors but when I try to fix it, says that hard drive is busy and cannot do anything else. I've unmounted it and mounted again but nothing happens. Do you know what can be going on? Cause the first time that I was able to see my hard drive it had all the files I have, but I don't know if deleting the partition will format the whole hard drive or just the ubuntu files. THANKS in advance! BY THE WAY, I'm new to Ubuntu... :S

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• Error after installing Ubuntu 12.04 using Wubi

  - by KJ50

  After using Windows Ubuntu Installer from within Windows, I am prompted to restart, so I follow the directions. When I try to start Ubuntu after restarting, the desktop background appears, but then a loading bar with this title appears. Verifying the installation configuration... While this is loading, an error window pops up that says No root file system is defined Please correct this from the partitioning menu There is only an 'Ok' button available to click, and if I click that the same error window appears. I do not know how to get to the "partitioning menu" from this state, so the only option I have is to shut down my computer. What can I do so that Ubuntu finds a "root file system"? Can I diagnose this problem via Windows? Does anyone have any insight? FYI - I am using a new ultrabook with 6GB RAM, Intel i7 3rd gen processor, and no CD/DVD drive.

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• "BAD idea" warning when trying to recover Grub, after Windows removed it

  - by Shazzner

  Tried sudo grub-install on sda1 but it complained about being a BAD IDEA. I had to install windows for a work related issue so I used a separate disk (I had used it for ubuntu on this computer, but bought a bigger disk so installed ubuntu on that and left the old one in in case I needed an old file). Windows installed fine but overwrote Grub. So if I choose the Ubuntu disk to boot first in BIOS I get a blank screen. I googled and followed this advice: https://help.ubuntu.com/community/RecoveringUbuntuAfterInstallingWindows However, when I get down to this section: sudo grub-install --root-directory=/media/0d104aff-ec8c-44c8-b811-92b993823444 /dev/sda1 I get this: Attempting to install GRUB to a partition instead of the MBR. This is a BAD idea… --recheck does nothing. Any ideas?

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• Ubuntu will not start any more !!!!!!!! PLEASE HELP?

  - by mike

  I really need help , I left my computer downloading all the night and i did donwload 35 go of movies ( legal ....) , I restart the computed in the morning then i booted in my encrypted windows partition for my work. Surprise in the evening when i try to boot on linux again , then it doesnt start as it's telling me low graphic mode , and doesnt boot( happen when it's really full ) . Tryed in rescue and it's telling me i have 0 mo free. Tryed in shell comand sdo root rm - Some files IMPOSSIBLE . it's telling me that my files are only in read only file systems. I mouted my other hard drive in windows as well but there is a '' Write protection '' i can only read the files. Please let me know , what solution do i have ? Should i try live usb with ubuntu ? Thanks guys

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• Running an Application on a Different Domain

  - by Mark Flory

  Were I am contracting at right now has a new development domain.  Because of IT security rules it is fairly isolated from the domain my computer normally logs into (for e-mail and such).  I do use a VM to log directly into the domain but one of my co-workers found this command to run things on your box but in the other domain.  Pretty cool. For example this runs SQL Server Management Tool for SQL Server 2008: runas /netonly /user:{domain}\{username} "C:\Program Files\Microsoft SQL Server\100\Tools\Binn\VSShell\Common7\IDE\ssms.exe" And this runs visual studios: runas /netonly /user:{domain}\{username} "C:\Program Files\Microsoft Visual Studio 9.0\Common7\IDE\devenv.exe" It does not solve the problem I wanted to solve which would be to be able to assign Users/Groups in Team Explorer.  It instead still uses the domain I am logged into's groups.

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• USB internet not accessible

  - by Eric

  I'm brand new to ubuntu and linux. We access internet from a usb stick issued by a local telephone company. When I plug the stick into the computer, I see the device listed under internet connections as a mobile broadband device but it is grayed out and inaccessible. I tried to create a new mobile broadband connection but my country (Gabon) is not listed and we have no payment plans per se (we pay from a pre-paid card system).. Any clues as to how I can get the system to recognize the internet connection? Thanks for any help...

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• Firefox installed on my ubuntu 12.04 machine but I am unable to connect to the internet(Nobody know???)

  - by Chella

  every other browser installed is working fine..! except this Firefox. what are the things that I need to check, to make firefox work on my computer. I am a newbie for ubuntu. I tried googling not got enough and clear information. Please help me. Thanks in advance..! This is the error that I am getting just before launching of the application..! Could not initialize the application's security component. The most likely cause is problems with files in your application's profile directory. Please check that this directory has no read/write restrictions and your hard disk is not full or close to full. It is recommended that you exit the application and fix the problem. If you continue to use this session, you might see incorrect application behaviour when accessing security features.

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• Ubuntu crash problem, need fix

  - by Brad

  Upgraded to 12.04 LTS Beta 2, on a Dimension E310. The unity Sidebar crashes while I use Software Center. The only way I can close Software center Is to either power off my computer or use force quit app on the unity side bar. Thats why I believe it's the sidebar crashing instead of the software center. But the other problem is, apport don't recognize the bug so nothing is sent. How do I file this bug? I looked in VAR/Crash and there was no crash report.

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• How to run 2 X sessions with different display managers?

  - by ved2254

  I read about the virtual terminals a little and that gave me an idea. I searched for a way to have two X sessions simultaneously. I had a look at these sites : 1. How to run multiple user X sessions on the same computer, at the same time? 2. How to drag windows between 2 X servers? I tried startx -- :1 but my earlier terminal (on Ctrl+Alt+F7) hung up. How do I ensure this does not happen? My main need is to get Unity on :0 and Gnome-shell on :1 and switch between them like workspaces. As per 2., switching is not recommended as it is not easy. But if I get at least 1., then I'd be happy. I have Ubuntu 12.04 64bit.

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• Internet connection crashes while wifi / lan stay connected

  - by pirad

  I am connected to a router by wifi or lan. But every few moments (sometimes seconds, sometimes half an hour) my connection to the internet breaks down. So in one moment I can surf with my firefox and have ping times of 20 ms (wifi) to the google server. And in the next moment I can't open any pages in any browser and the ping shows no new messages first and then "Destination Host Unreachable". This is especially odd as another computer or my smart phone stays connected at the same time to the same network and seems to notice nothing. So I have a problem independend of wifi or lan drivers but with something else. Where should I look for logs that could tell me more information? I can't find some in syslog. Just if I reconnect to the router (wich works for another few moments) there are a lot of informations. But everythin is okay then.

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• Is there a way to force lubuntu screen resolution?

  - by za1

  I have a Dell Inspiron 4000, 900 Mhz Pentium III, 192 MB RAM,10.1 GB disk running Lubuntu 12.04. When I start the computer, and I check the display resolution, Monitor Settings claims that the max resolution is 1024x768. I then connected another monitor I had lying around, rebooted, and now the laptop monitor looks normal,and monitor settings claims that 1280x1024 is the max resolution (it is) and the other monitor doesn't turn on. (black screen) The external monitor is not broken. Is there a way to, without the external monitor, force the laptop monitor resolution to 1280x1024? (The following is another question) - How can you run commands automatically at startup? Specifically "xinput 18 118 0" (without quotes) The first question is important, I can live with typing the second one at every boot. Thanks

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• Can I launch Windows 8 with grub?

  - by Laurbert515

  I accidentally deleted the boot loader for Windows 8 (I think). Here is the situation: I just got a new computer with 2 HDD (sda, sdb). Now, all of the windows OS was installed on sdb (all except for about 210 MB on sda). I formatted sda and installed Kubuntu 12.04.2 (which only loads the terminal because it says it can't find a screen, but that's another story!) Now, my Windows 8 data and NTFS partitions, etc. are still on sdb and untouched. Unfortunately, I cannot see an option to boot into Windows 8 in grub, so is there a way that I can go about using grub to point to the Windows 8 OS? The only other option I can think of is to buy a fresh copy of Windows 8 and install it fresh (no, I didn't create a backup USB because I'm an idiot ...)

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• Advice on triple/quadruple-booting?

  - by professorfish

  I am currently running Windows 7 Home Premium x64 on my laptop. I would like to install more than one Linux distro, IN ADDITION TO Windows 7. How do I go about this, what do I need to be careful and aware of, is it possible? The specific distros I might eventually install: Definitely: Ubuntu (is it a good idea to install the Linux-Secure-Remix version?) Almost definitely: OpenSUSE Probably: Zorin Possibly: Arch Possibly: Fedora Possibly: FreeBSD Computer details: Successfully used WUBI for Ubuntu in the past Recently reinstalled Windows using the RECOVERY partition Windows 7 Home Premium x64 model: ASUS K53U series AMD Brazos Dual Core E450 1.65 GHz 750GB hard drive, currently partitioned into C: (300GB total, 246 GB free), D: (373GB - total, 167 GB free), and RECOVERY (the rest of the space, I think) 4GB RAM Can I be sure that GRUB will work, if WUBI has worked? In short, how do I go about triple- or quadruple-booting Windows 7, Ubuntu and other distros? What do I need to be aware of? How do I set up the partition structure? Thank you in advance

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• issue with vmd install not working any more. lubuntu 12.10

  - by Magpie

  I had vmd working on my lubuntu 64 bit but all of a sudden I was getting errors when I tried to run it. I tried reinstalling it but no joy. The error I now get when I try to run rlwrap: No match. I don't use make unless I have to so I don't know all that much about it. I have removing vmd completely to see if that helped. I tried the suggestions it made (I am sorry, I can't remember the details but it was moaning about CUDA and my graphic drivers for a while. I had not updated it or anything. It was fine until I went away from the computer and came back to it like that. If nobody can help I will try reinstalling my system and see if that helps.

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• why does my lubuntu recognizes only lubuntu instalation cds?

  - by Hardi

  I installed lubuntu from alternate cd a month ago. Now when I needed to read some cd's, the cd try won't open. It can be opened before ubuntu boots up. It can be opened after entering sudo eject -i off from console. But it won't mount any other cd-roms, than just the lubuntu live-cd and lubuntu alternate instal cd, where it was installed from. "mount: no medium found on /dev/sr0" as output, when try to mount anything else. Problem can't be in corrupted sd's, because othe computer, did recognize them well.

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• How can I programmatically block user input for a given time?

  - by black_puppydog

  As a person working in computer science working offline to avoid facebook and thelike is not always (meaning hardly ever) possible for me since I mostly have to be online to work. I have tried leechblock and similar things but the problem becomes that at some point I start making systems for myself to hack, which is kind of pointless if oyu have root. I would very much like to try out the method described here. (Short version: reboot your PC every time finish a task or get bored with it) Unlike for the author of this blog my work is mainly done not in screen sessions but in IDEs ans other not-so-fast-to-start-up stuff, meaning a full reboot including loading all my programs will take its time. So, the question is: How can I block all user input and preferrably blank the screen for a given amount of time? The idea would then be to have a keyboard shortcut to activate the script/program (which would probably also have to have root i guess?)

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