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  • How do I properly dual boot Ubuntu and Windows 7 on an UEFI system?

    - by S. Robert James
    I have an HP Z210 with Windows 7, which is UEFI based. I'd like to dual boot it to Ubuntu 11.10 with GRUB2, but am having problems due to the UEFI. The install CD goes to the end, but then the machine always boots right into Windows. These problems are apparently documented (here and here), but there's no consensus as to what the simplest solution is. Any recommendations? I want Ubuntu and Windows to both be bootable. (Perhaps if I knew more about UEFI and its system partition, and how it differs from BIOS and MBR, I'd be in a better position. So background answers explaining how UEFI loads up are very appreciated.)

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  • Linux is not an operating system, or is it?

    <b>Technology & Life Integration:</b> "There is a word in the English language (which I hope I am using) called context. In other words, I use the word Linux in the context of a complete Linux based distribution and believe that my readers understand that context."

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  • How should I structure moving from overworld to menu system / combat?

    - by persepolis
    I'm making a text-based "Arena" game where the player is the owner of 5 creatures that battle other teams for loot, experience and glory. The game is very simple, using Python and a curses emulator. I have a static ASCII map of an "overworld" of sorts. My character, represented by a glyph, can move about this static map. There are locations all over the map that the character can visit, that break down into two types: 1) Towns, which are a series of menus that will allow the player to buy equipment for his team, hire new recruits or do other things. 2) Arenas, where the player's team will have a "battle" interface with actions he can perform, messages about the fight, etc. Maybe later, an ASCII representation of the fight but for now, just screens of information with action prompts. My main problem is what kind of design or structure I should use to implement this? Right now, the game goes through a master loop which waits for keyboard input and then moves the player about the screen. My current thinking is this: 1) Upon keyboard input, the Player coordinates are checked against a list of Location objects and if the Player coords match the Location coords then... 2) ??? I'm not sure if I should then call a seperate function to initiate a "menu" or "combat" mode. Or should I create some kind of new GameMode object that contains a method itself for drawing the screen, printing the necessary info? How do I pass my player's team data into this object? My main concern is passing around the program flow into all these objects. Should I be calling straight functions for different parts of my game, and objects to represent "things" within my game? I was reading about the MVC pattern and how this kind of problem might benefit - decouple the GUI from the game logic and user input but I have no idea how this applies to my game.

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  • Does it make sense to implement OAuth for a 2 party system?

    - by nbv4
    I'm under the impression that OAuth is for authentication between three parties. Does it make sense to implement OAuth in a context where there is just a client and server. We have a server, and a client (HTML/javascript). Currently we authenticate via the normal "post credentials to server, get a cookie, use cookie to authenticate all subsequent requests" method. Will implementing OAuth be a benefit in this situation?

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  • Implementing a Custom Coherence PartitionAssignmentStrategy

    - by jpurdy
    A recent A-Team engagement required the development of a custom PartitionAssignmentStrategy (PAS). By way of background, a PAS is an implementation of a Java interface that controls how a Coherence partitioned cache service assigns partitions (primary and backup copies) across the available set of storage-enabled members. While seemingly straightforward, this is actually a very difficult problem to solve. Traditionally, Coherence used a distributed algorithm spread across the cache servers (and as of Coherence 3.7, this is still the default implementation). With the introduction of the PAS interface, the model of operation was changed so that the logic would run solely in the cache service senior member. Obviously, this makes the development of a custom PAS vastly less complex, and in practice does not introduce a significant single point of failure/bottleneck. Note that Coherence ships with a default PAS implementation but it is not used by default. Further, custom PAS implementations are uncommon (this engagement was the first custom implementation that we know of). The particular implementation mentioned above also faced challenges related to managing multiple backup copies but that won't be discussed here. There were a few challenges that arose during design and implementation: Naive algorithms had an unreasonable upper bound of computational cost. There was significant complexity associated with configurations where the member count varied significantly between physical machines. Most of the complexity of a PAS is related to rebalancing, not initial assignment (which is usually fairly simple). A custom PAS may need to solve several problems simultaneously, such as: Ensuring that each member has a similar number of primary and backup partitions (e.g. each member has the same number of primary and backup partitions) Ensuring that each member carries similar responsibility (e.g. the most heavily loaded member has no more than one partition more than the least loaded). Ensuring that each partition is on the same member as a corresponding local resource (e.g. for applications that use partitioning across message queues, to ensure that each partition is collocated with its corresponding message queue). Ensuring that a given member holds no more than a given number of partitions (e.g. no member has more than 10 partitions) Ensuring that backups are placed far enough away from the primaries (e.g. on a different physical machine or a different blade enclosure) Achieving the above goals while ensuring that partition movement is minimized. These objectives can be even more complicated when the topology of the cluster is irregular. For example, if multiple cluster members may exist on each physical machine, then clearly the possibility exists that at certain points (e.g. following a member failure), the number of members on each machine may vary, in certain cases significantly so. Consider the case where there are three physical machines, with 3, 3 and 9 members each (respectively). This introduces complexity since the backups for the 9 members on the the largest machine must be spread across the other 6 members (to ensure placement on different physical machines), preventing an even distribution. For any given problem like this, there are usually reasonable compromises available, but the key point is that objectives may conflict under extreme (but not at all unlikely) circumstances. The most obvious general purpose partition assignment algorithm (possibly the only general purpose one) is to define a scoring function for a given mapping of partitions to members, and then apply that function to each possible permutation, selecting the most optimal permutation. This would result in N! (factorial) evaluations of the scoring function. This is clearly impractical for all but the smallest values of N (e.g. a partition count in the single digits). It's difficult to prove that more efficient general purpose algorithms don't exist, but the key take away from this is that algorithms will tend to either have exorbitant worst case performance or may fail to find optimal solutions (or both) -- it is very important to be able to show that worst case performance is acceptable. This quickly leads to the conclusion that the problem must be further constrained, perhaps by limiting functionality or by using domain-specific optimizations. Unfortunately, it can be very difficult to design these more focused algorithms. In the specific case mentioned, we constrained the solution space to very small clusters (in terms of machine count) with small partition counts and supported exactly two backup copies, and accepted the fact that partition movement could potentially be significant (preferring to solve that issue through brute force). We then used the out-of-the-box PAS implementation as a fallback, delegating to it for configurations that were not supported by our algorithm. Our experience was that the PAS interface is quite usable, but there are intrinsic challenges to designing PAS implementations that should be very carefully evaluated before committing to that approach.

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  • Install ubuntu with Win7

    - by 123Ex
    I'm using windows 7, Now I need to install Ubuntu 11.04 to the my lap top, I want keep win7 in my lap, I'm planing to keep dual boot system on my lap, I want to install Ubuntu on separate partition, I have deleted my windows empty partition to allocate the space to Ubuntu but when I'm proceeding with installation in Ubuntu, I couldn't recognize the empty partition, Ubuntu shows my full hard disk space one 50GB partition to install, I couldn't recognize the 50GB partition, can anyone tell me how to install Ubuntu on my lap. I really appreciate it, I want to install Ubuntu without loosing my existing data, to do that I have allocated empty unlocated disk space. Thank you in advance!

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  • Java: How to test methods that call System.exit()?

    - by Chris Conway
    I've got a few methods that should call System.exit() on certain inputs. Unfortunately, testing these cases causes JUnit to terminate! Putting the method calls in a new Thread doesn't seem to help, since System.exit() terminates the JVM, not just the current thread. Are there any common patterns for dealing with this? For example, can I subsitute a stub for System.exit()? [EDIT] The class in question is actually a command-line tool which I'm attempting to test inside JUnit. Maybe JUnit is simply not the right tool for the job? Suggestions for complementary regression testing tools are welcome (preferably something that integrates well with JUnit and EclEmma).

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  • Creating an Ubuntu live USB for use with Gparted

    - by Jeff
    I've install Ubuntu 12.04 on my Windows 7 Dell laptop. Recently I discovered that I'm running out of space on my Ubuntu partition, and I would like to enlarge it. Is it safe to resize partitions while they're in use e.g. when I'm logged into Ubuntu? If so, I've ran into this problem when I run GParted: It seems as if my hard drive is one big, NTFS partition, like the Ubuntu partition doesn't exist. Is it possible Ubuntu runs off the NTFS partition, sharing it with Windows? What should I do?

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  • My Folders Become Hidden System Files And Access Denied?

    - by echolab
    I just aske a question in Superuser site , i have an external hdd which suddenly seems infected and one of my folders which contain my photos changed to something like this One of superuser guys suggest that i install an ubuntu and try to scan and change permissions , but i am not an ubuntu expert , and believe me if my problem solve i will switch to it ( cause all i do is writing and taking photos i am tired of malewares and etc ) Now i have ubuntu and fedora installed ( after a long read through guides ) , both of them show infected folder as empty ( in windows 7 i see this strange folders , you can see in picture )

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  • i have xp partitioned and formatted fat32 it says it needs to be bootable to install ubuntu how do i do that? [duplicate]

    - by Rob Bailey
    This question already has an answer here: How do I install Ubuntu? 4 answers I have partitioned the hard drive and formatted it fat 32 as it is only 16gig. I have just read that I should not partition the hard drive so I have deleted the partition, I noticed that if i re-partition it my options would be NTFS, Fat32 or exfat. I tried to install ubuntu 12.10 but it flashed up something along the lines of the partition is not bootable and it must be for ubuntu to install. I know my copy works as a friend installed it over his copy of windows and it works perfect, I have ubuntu on my flashdrive, I want to run it along side xp.

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  • Ubuntu Variant / Linux Distros which uses least system resources (RAM, CPU)?

    - by elegantonyx
    I have a netbook (an older Asus EEEPC 1005HA) which I want to get rid of Windoze on (I like Windows, but I don't think it works well in a netbook environment). Basically, my question is which Ubuntu variant will use the least RAM and CPU running idle, and/or the same question except when running Firefox and Libreoffice Writer, say. I am also open to suggestions of non-Ubuntu Linux distros, but since this is AskUbuntu I thought the first question would be more appropriate. I have a disk drive which I can attach to the netbook, so it doesn't have to be a Ubuntu Variant / Linux Distro which solely boots from a USB drive. I have at my disposal: DVDs, DVD writer/ disk drive, 4gb flash drive, 8 gb flash drive I was thinking either Lubuntu or Archbang / Crunchbang but I would like some help from more knowledgable people Specs: Can't boot into it right now, but I think I have either Intel Atom N270 @1.60ghz OR Intel Atom N280 @1.66ghz (single core, I think) 2gb RAM 160 GB hard drive

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  • How can I push a string from one client connected to a WCF service to another connected as well?

    - by Sergio Tapia
    Here's what I have so far: IService: using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.ServiceModel; namespace ServiceLibrary { [ServiceContract(SessionMode = SessionMode.Allowed, CallbackContract = typeof(IServiceCallback))] public interface IService { [OperationContract(IsOneWay = false, IsInitiating = true, IsTerminating = false)] void Join(string userName); } interface IServiceCallback { [OperationContract(IsOneWay = true)] void UserJoined(string senderName); } } Service: using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.ServiceModel; namespace ServiceLibrary { [ServiceBehavior(InstanceContextMode = InstanceContextMode.PerSession, ConcurrencyMode = ConcurrencyMode.Multiple)] public class Service:IService { IServiceCallback callback = null; public void Join(string userName) { callback = OperationContext.Current.GetCallbackChannel<IServiceCallback>(); } } } Just a simple string passed from one client to another.

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  • Activate swap by default

    - by San
    I installed Ubuntu 11.04 Natty and I set a partition for swap about 900 MB. Afterthat, I installed Kubuntu 12.10 Quantal, repartitioned my hard disk so I had 2048 MB swap (replaced 900 MB swap partition). I ran Kubuntu, and it's ok. But after I ran Ubuntu 11.04 Natty, It didn't use that swap. But I can activate it with Gparted. Some additional information. When I installed Kubuntu Quantal. I make 256 MB partition (ext4 mount point in /boot) which replaced previous 256 MB partition (ext4 mount point in /boot) that I created when I installed Natty. Something wrong with my configuration?.

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  • Why can't I install Ubuntu 10.04 on a system that already has Ubuntu 8.04?

    - by Android Eve
    Ubuntu 10.04 is beautiful. I love it. I am dying to install it on my PC, alongside the existing Ubuntu 8.04 (from which I write this message right now). But... it won't let me! When I reach the partitioning stage (manual!) Ubuntu 10.04 sees my two HDDs as one RAID volume. It doesn't see all the partitions I already have in place in /dev/sda and /dev/sdb. Even Windows 7 doesn't behave like this... (yes, I actually managed to install Windows 7 64-bit in dual-boot configuration with Ubuntu 8.04 on this same system). Note: GParted on Ubuntu 10.04 (live CD) sees the partition intended for Ubuntu 10.04 (/dev/sda4) perfectly, but is unable to format it. Any idea how to solve this problem?

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  • Is it possible to use multiple desktop environments on same system?

    - by Kshitiz Sharma
    I am using Ubuntu 12.04. I want to try out KDE and other desktop environments. But I'm not sure if I'll like them enough to switch permanently. I want to be safe and make a transition in a piecemeal fashion. Is it possible to install KDE on Ubuntu and yet not do away with the default Unity shell? Could I install multiple desktop environments and switch between them by tweaking some startup configuration and then rebooting?

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  • what are the "Online accounts" used for under System Settings?

    - by user67811
    I previously never bothered with it. but I just did a fresh install of 12.04 and figured "hey maybe i'll put in my google account and see what happens" I logged in with google and everyting like mal/calendar/contacts/chat is set to "on"... I figured it might automatically set up my gmail for various applications like empathy and thunderbird.. but I opened them up and found nothing... What exactly is the purpose of adding your account to "online accounts"? where is it used?

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  • Really weird situation with Swap that refuses to work

    - by Ghost
    So I decide to move my Swap partition to another HDD to make hibernation more fast, I create a partition with a liveUSB, do swapon, and then hibernate just disappears I go into the terminal, reactivate hibernate (so the button shows) for some reason the swap wasn't "on" so I do swapon again. Still not working. I go back to the terminal and edit the file with the UUID of the new swap partition. The partition shows as swap on gparted, it's on, the file has the right UUID, even the task manager shows a swap area of 10GB, and there is a hibernate button on the shutdown window. But it-wont-hibernate! What's going on?

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  • Ubuntu 12.04 LTX Install Problems (See post for system build details.)

    - by Lokitez
    This is my first ever attempt at working with Ubuntu. I have only ever installed Windows in the past and that may be the problem. I purchased all new hardware this week and I would really like to give Ubuntu a chance (especially since I don't want to buy another Windows license). First, the hardware: AMD FX-8150 Zambezi 3.6GHz Socket AM3+ 125W Eight-Core Desktop Processor ASUS Crosshair V Formula AM3+ AMD 990FX SATA 6Gb/s USB 3.0 ATX AMD Gaming Motherboard SAMSUNG 830 Series MZ-7PC128D/AM 2.5" 128GB SATA III MLC Internal Solid State Drive (SSD) - This is my intended boot drive. Western Digital VelociRaptor WD5000HHTZ 500GB 10000 RPM SATA 6.0Gb/s 3.5" Internal Hard Drive - This is a backup drive that I have installed Windows Vista on until I can get Ubuntu to work. G.SKILL Ripjaws X Series 16GB (2 x 8GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) ASUS HD7850-DC2-2GD5 Radeon HD 7850 2GB 256-bit GDDR5 PCI Express 3.0 x16 I have downloaded and tried to install both Ubuntu 64 bit and Kubuntu 64 bit (both 12.04). Both will always fail to copy a file during install or otherwise lockup during install to the SSD. I have burned two copies of the Ubuntu 12.04 and had the install fail with both. I have installed Vista onto the HDD. Is it possible to mount the Ubuntu file into

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  • Fresh install of 64 bit 12.04 over 32 bit 11.10 alongside Windows 7

    - by Pareen
    I currently have Ubuntu 11.10 32 bit and Windows 7 dual boot in separate partitions. I am trying to do a fresh install of Ubuntu 12.04 64 bit (mistakenly installed the 32 bit 11.10 a little while ago.. I need a 64 bit version to support AOSP build) OVER my the exisiting 11.10 partition. I have referenced How to Install fresh 12.04 install to a PC with dual booting Windows 7 & Ubuntu11.10?, as well as other posts on using the Live CD to do a fresh install. However, the problem I am experiencing is when I bring up the install screen, it says the following: This computer has multiple operating systems on it. What would you like to do. (3 options) Install Ubuntu 12.04 alongside them Replace all with Ubuntu 12.04 (Warning, this will delete files across ALL operating systems) Something else (you can create or resize partitions yourself) This is different from what is in other posts, as mine states that there are "multiple O.Ses" and doesnt individually allow me to replace the Ubuntu 11.10. I don't want to replace ALL O.S.es: I need to preserve Windows 7 and am only trying to replace the old Ubuntu 11.10 partition with the new 12.04 64 bit. I did have Ubuntu installed via Wubi (I believe it was 10.04) prior to putting 11.10 in a separate partition, but I have removed it via Add/Remove programs in Windows. I was wondering how to go about doing this... Should I use the "Something else" option to bring up the partition manager, and just assign my existing 11.10 partition with root mount point + swap space. Will this do the same thing by overwriting with fresh 12.04 install?? I appreciate all your help.

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  • What's the term describing this system for generating user interfaces?

    - by mjfgates
    So, there's this idea, which you already know: Define the layout of your UI by creating a tree of panels. The leaf nodes on the tree are what we used to call 'controls' way back in the day-- the things that the user interacts with, radio buttons and listboxes and such. The internal nodes are mostly concerned with layout; this kind of panel stacks its child panels vertically, that kind puts its children into a grid, etc. It's COMMON. Most of the UI-generating systems I've seen in the past twenty years are implementations of this, and the ones that aren't borrow from it. What's the word for this idea?

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  • Is it possible to start an additional X server after the system boots in 12.04?

    - by jackweirdy
    I'd like to have 2 VT's running, one on VT7 with the standard lightdm + unity interface and another on VT8 running a custom script which will launch a virtual machine in full screen. At the moment I've tried writing an init.d script with no luck and I can't find any details on a configuration file which will allow me to start 2 servers. I suppose my ideal answer would be one which points me to a config file I can edit to start up an additional server. Edit - I forgot to mention in the text that I already know how to start another X session: I'd like this to start automatically at boot.

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  • How can I create a flexible system for tiling a 2D RPG map?

    - by CptSupermrkt
    Using libgdx here. I've just finished learning some of the basics of creating a 2D environment and using an OrthographicCamera to view it. The tutorials I went through, however, hardcoded their tiled map in, and none made mention of how to do it any other way. By tiled map, I mean like Final Fantasy 1, where the world map is a grid of squares, each with a different texture. So for example, I've got a 6 tile x 6 tile map, using the following code: Array<Tile> tiles = new Array<Tile>(); tiles.add(new Tile(new Vector2(0,5), TileType.FOREST)); tiles.add(new Tile(new Vector2(1,5), TileType.FOREST)); tiles.add(new Tile(new Vector2(2,5), TileType.FOREST)); tiles.add(new Tile(new Vector2(3,5), TileType.GRASS)); tiles.add(new Tile(new Vector2(4,5), TileType.STONE)); tiles.add(new Tile(new Vector2(5,5), TileType.STONE)); //... x5 more times. Given the random nature of the environment, for loops don't really help as I have to start and finish a loop before I was able to do enough to make it worth setting up the loop. I can see how a loop might be helpful for like tiling an ocean or something, but not in the above case. The above code DOES get me my final desired output, however, if I were to decide I wanted to move a piece or swap two pieces out, oh boy, what a nightmare, even with just a 6x6 test piece, much less a 1000x1000 world map. There must be a better way of doing this. Someone on some post somewhere (can't find it now, of course) said to check out MapEditor. Looks legit. The question is, if that is the answer, how can I make something in MapEditor and have the output map plug in to a variable in my code? I need the tiles as objects in my code, because for example, I determine whether or not a tile is can be passed through or collided with based on my TileTyle enum variable. Are there alternative/language "native" (i.e. not using an outside tool) methods to doing this?

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  • My system screen goes black and displays Term Signal Killed?

    - by Quandite
    My computer will often just die randomly while I am using it. The screen goes black and sometimes displays the words TERM signal killed along with other things and sometimes it displays nothing. The writing stays on the screen momentarily before it disappears to just black. I then have to hold in the power button to turn it off and then re boot. Here are the specs... help! Ubuntu 10.04(lucid) Kernel Linux 2.6.32-23-generic GNOME 2.30.2 memory 495.7 MiB processor Intel(R) Pentium(R) 4CPU 1.80GHz

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  • How Does a Login system generally work with OOP?

    - by fakingfantastic
    Sorry if this is a badly formed question, but I'm trying to make my web applications (using PHP) more OO. *EDIT* I'm developing the Framework myself */EDIT* Everything is great so far, I've made a Front Controller system that taps into a MVC system. The FC figures out what page you want, loads the specific page Controller (*EDIT* which extends an abstract Controller Object */EDIT*), which gets anything it needs from Models, and then calls the appropriate View. Very basic. But now, I need to make an admin section (quasi-CMS). How does a login system fit into the grand scheme of things? Do you set controllers as needing a login? If so, how? What If you only want certain views of a controller requiring login? Thanks in advance.

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  • /dev/sda2 contains a filesystem with error after partitioning

    - by Private
    I just wanted to create a separate home partition on my Ubuntu 12.10 system. I booted the liveDVD, resized the sda2 partition (28gb of data resized to 30gb based on MiB [originally on a 100gb partition]) and made a new ext4 partition for the home folder. The drive is an SSD drive. I had changed the settings (noatime etc.) for SSD succesfully a week ago. On reboot I get the following error: /dev/sda2 contains a filesystem with errors Inode 74669 has an invalid extent node (blk 6881289) fsd / [953] terminated with status 4 What would you suggest me to do? If I can avoid a clean install that would save me a lot of time (I had just done all the config). I was following this HOWTO, but I did not get to changing any of the files or configs other than those with gparted. I have a (two-week old) SSD Samsung drive which is functioning just fine (other specs see bottom of this question). Other specs: 64bit 12.10, i7, 8gb ram, nvidia.

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