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  • Grub does not autoboot the default option after upgrade to 12.10

    - by Petr Kozelka
    I recently upgraded Ubuntu from 12.04 to 12.10 and since that time, the system does not automatically boot. It always opens the boot menu, and I have to press Enter to make it boot Ubuntu. It seems to be ignoring the timeout value, and using a 'neverending' timeout. There are no other systems (no dual boot), only the options originally installed by default Ubuntu 12.04 installation. My /etc/default/grub has only these effective options: GRUB_DEFAULT='Ubuntu' GRUB_HIDDEN_TIMEOUT=1 GRUB_HIDDEN_TIMEOUT_QUIET=true GRUB_TIMEOUT=1 GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian` GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" GRUB_CMDLINE_LINUX="" GRUB_TERMINAL=console I experimented with GRUB_DEFAULT, giving it values '0', '1', 'Ubuntu' but nothing helps. Yes I always run update-grub afterwards. How can I make the system booting again ?

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  • Calling functions from different classes

    - by A Ron Hubbard Clevenger
    I'm writing a program and I'm supposed to check and see if a certain object is in the list before I call it. I set up the contains() method which is supposed to use the equals() method of the Comparable interface I implemented on my Golfer class but it doesn't seem to call it (I put print statements in to check). I can't seem to figure out whats wrong with the code, the ArrayUnsortedList class I'm using to go through the list even uses the correct toString() method I defined in my Golfer class but for some reason it won't use the equals() method I implemented. //From "GolfApp.java" public class GolfApp{ ListInterface <Golfer>golfers = new ArraySortedList<Golfer> (20); Golfer golfer; //..*snip*.. if(this.golfers.contains(new Golfer(name,score))) System.out.println("The list already contains this golfer"); else{ this.golfers.add(this.golfer = new Golfer(name,score)); System.out.println("This golfer is already on the list"); } //From "ArrayUnsortedList.java" protected void find(T target){ location = 0; found = false; while (location < numElements){ if (list[location].equals(target)) //Where I think the problem is { found = true; return; } else location++; } } public boolean contains(T element){ find(element); return found; } //From "Golfer.java" public class Golfer implements Comparable<Golfer>{ //..irrelavant code sniped..// public boolean equals(Golfer golfer) { String thisString = score + ":" + name; String otherString = golfer.getScore() + ":" + golfer.getName() ; System.out.println("Golfer.equals() has bee called"); return thisString.equalsIgnoreCase(otherString); } public String toString() { return (score + ":" + name); } My main problem seems to be getting the find function of the ArrayUnsortedList to call my equals function in the find() part of the List but I'm not exactly sure why, like I said when I have it printed out it works with the toString() method I implemented perfectly. I'm almost positive the problem has to do with the find() function in the ArraySortedList not calling my equals() method. I tried using some other functions that relied on the find() method and got the same results.

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  • How To Make Disposable Sleeves for Your In-Ear Monitors

    - by YatriTrivedi
    In-ear monitors are great, until the rubber sleeves stop being comfortable. Here’s a quick and cheap way to make disposable ones using foam ear plugs so you can stay comfortable while listening. Latest Features How-To Geek ETC Macs Don’t Make You Creative! So Why Do Artists Really Love Apple? MacX DVD Ripper Pro is Free for How-To Geek Readers (Time Limited!) HTG Explains: What’s a Solid State Drive and What Do I Need to Know? How to Get Amazing Color from Photos in Photoshop, GIMP, and Paint.NET Learn To Adjust Contrast Like a Pro in Photoshop, GIMP, and Paint.NET Have You Ever Wondered How Your Operating System Got Its Name? Lakeside Sunset in the Mountains [Wallpaper] Taskbar Meters Turn Your Taskbar into a System Resource Monitor Create Shortcuts for Your Favorite or Most Used Folders in Ubuntu Create Custom Sized Thumbnail Images with Simple Image Resizer [Cross-Platform] Etch a Circuit Board using a Simple Homemade Mixture Sync Blocker Stops iTunes from Automatically Syncing

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  • Modularity through HTTP

    - by Michael Williamson
    As programmers, we strive for modularity in the code we write. We hope that splitting the problem up makes it easier to solve, and allows us to reuse parts of our code in other applications. Object-orientation is the most obvious of many attempts to get us closer to this ideal, and yet one of the most successful approaches is almost accidental: the web. Programming languages provide us with functions and classes, and plenty of other ways to modularize our code. This allows us to take our large problem, split it into small parts, and solve those small parts without having to worry about the whole. It also makes it easier to reason about our code. So far, so good, but now that we’ve written our small, independent module, for example to send out e-mails to my customers, we’d like to reuse it in another application. By creating DLLs, JARs or our platform’s package container of choice, we can do just that – provided our new application is on the same platform. Want to use a Java library from C#? Well, good luck – it might be possible, but it’s not going to be smooth sailing. Even if a library exists, it doesn’t mean that using it going to be a pleasant experience. Say I want to use Java to write out an XML document to an output stream. You’d imagine this would be a simple one-liner. You’d be wrong: import org.w3c.dom.*; import java.io.*; import javax.xml.transform.*; import javax.xml.transform.dom.*; import javax.xml.transform.stream.*; private static final void writeDoc(Document doc, OutputStream out) throws IOException { try { Transformer t = TransformerFactory.newInstance().newTransformer(); t.setOutputProperty(OutputKeys.DOCTYPE_SYSTEM, doc.getDoctype().getSystemId()); t.transform(new DOMSource(doc), new StreamResult(out)); } catch (TransformerException e) { throw new AssertionError(e); // Can't happen! } } Most of the time, there is a good chance somebody else has written the code before, but if nobody can understand the interface to that code, nobody’s going to use it. The result is that most of the code we write is just a variation on a theme. Despite our best efforts, we’ve fallen a little short of our ideal, but the web brings us closer. If we want to send e-mails to our customers, we could write an e-mail-sending library. More likely, we’d use an existing one for our language. Even then, we probably wouldn’t have niceties like A/B testing or DKIM signing. Alternatively, we could just fire some HTTP requests at MailChimp, and get a whole slew of features without getting anywhere near the code that implements them. The web is inherently language agnostic. So long as your language can send and receive text over HTTP, and probably parse some JSON, you’re about as well equipped as anybody. Instead of building libraries for a specific language, we can build a service that almost every language can reuse. The text-based nature of HTTP also helps to limit the complexity of the API. As SOAP will attest, you can still make a horrible mess using HTTP, but at least it is an obvious horrible mess. Complex data structures are tedious to marshal to and from text, providing a strong incentive to keep things simple. By contrast, spotting the complexities in a class hierarchy is often not as easy. HTTP doesn’t solve every problem. It probably isn’t such a good idea to use it inside an inner loop that’s executed thousands of times per second. What’s more, the HTTP approach might introduce some new problems. We often need to add a thin shim to each application that we wish to communicate over HTTP. For instance, we might need to write a small plugin in PHP if we want to integrate WordPress into our system. Suddenly, instead of a system written in one language, we’re maintaining a system with several distinct languages and platforms. Even then, we should strive to avoid re-implementing the same old thing. As programmers, we consistently underestimate both the cost of building a system and the ongoing maintenance. If we allow ourselves to integrate existing applications, even if they’re in unfamiliar languages, we save ourselves those development and maintenance costs, as well as being able to pick the best solution for our problem. Thanks to the web, HTTP is often the easiest way to get there.

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  • How to keep balance / Unlock items / achievement rules

    - by Mark Knol
    I'm working on an engine for a game, too learn javascript and just because its fun. I'm a flashdeveloper, I know how to build websites. Now making games is a different challenge, javascript is a challenge, but I'd love to learn how to structure code and what patterns are common. I dont mind if the game ever finish, I'm mostly interested in the programming part of it. I dont have a particular endresult in mind, so I'll see where it takes me. I currently have a system where you can buy items. The items cost a specified amount of gold, silver, diamonds etc. When you have selected and bought the item, it takes time before getting rewarded. When time is over, you are getting rewarded with other properties (gold, energy, diamonds). For example, you can buy an apple for 50gold, It takes a minute, you get rewarded with 75energy. Or if you take a run, it cost 50energy, it takes 5minutes, reward is 25gold and 25silver. These definitions is what i call actions. Currently I already have a system where this already works and I can define as much actions with as much properties as I want. The definitions I have kinda looks like this: {id:101, category:544, onInit:{gold:-75}, onComplete:{energy:75}, time:2000, name:"Apple", locked: false} {id:102, category:544, onInit:{gold:-135}, onComplete:{energy:145}, time:2000, name:"Banana", locked: false} {id:106, category:302, onInit:{energy:-50, power: -25}, onComplete:{gold:100, diamonds:2}, time:10000, name:"Run", locked: false} {id:107, category:302, onInit:{energy:-70, silver: -55}, onComplete:{gold:100}, time:10000, name:"Dance", locked: false} {id:108, category:302, onInit:{energy:-230, power: -355}, onComplete:{gold:70, silver:70}, time:10000, name:"Fitness", locked: false} Now, I would love to add a system where I can lock/unlock the actions using achievement rules. Lets say, if you buy 10 apples, you unlock a new action, like bananas which cost more, and reward more. In the future I maybe want to restrict achievements and actions to levels. I am kinda stuck how to structure this. I have 2 questions: Which patterns are used to define achievements? How/where are they defined? Should it be part of the action, or should it be a separate controller? Is it a good idea to register all completed actions to it? I think I want multiple types of achievement rules, Id love to hear some ideas how to develop it. How do you create/find a good balance, so the user does not get stuck or can cheat by repeat a pattern of actions to get too much rewards. I know there is not a simple answer and i'm lacking of a good game-concept, but I wonder if anyone created such a game and how you dealed and played with it.

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  • PowerShell programming conventions

    - by Tahir Hassan
    Do you follow any any conventions when programming in PowerShell? For example, in scripts which are to be maintained long-term do you: Use the real cmdlet name or alias? Specify the cmdlet parameter name in full or only partially (dir -Recurse versus dir -r) When specifying string arguments for cmdlets do you enclose them in quotes (New-Object 'System.Int32' versus New-Object System.Int32 When writing functions and filters do you specify the types of parameters? Do you write cmdlets in the (official) correct case? For keywords like BEGIN...PROCESS...END do you write them in uppercase only? Thanks for any replies.

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  • mounting external hard drive EXT4: "the unlocked device does not have a reckognizable filesystem on it"?

    - by user824924
    I'm having problems mounting ext4 partitions(inside a LUKS partition) in external drives. The drives are fine, there is no problem whatsoever with the drives and no filesystem corruption. This happened since a recent automatic system upgrade, and a manual upgrade to kernel 3.12.0. It goes like this: I plug in the external drive Passphrase is asked for luks device luks partition correctly unlocked/opened Instead of proceding with mounting the now exposed ext4 partition there's a pop-up saying: "the unlocked device does not have a recognizable filesystem on it". Same happens in this case: $ gvfs-mount -d /dev/sdc2 Enter a passphrase to unlock the volume The passphrase is needed to access encrypted data on WDC WD250... (250 GB Hard Disk). Password: Error mounting /dev/sdc2: The unlocked device does not have a recognizable file system on it Doing a manual sudo mount /dev/dm-1 /mnt/testfolder works with no errors and there is no problem with the filesystem (fscked). Also there doesn’t seem to be anything useful written to dmesg when this happens. What gives?

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  • Is it time to drop Courier from your monospace font stacks?

    - by Jeff
    I've been fine-tuning my font stacks lately and was wondering if it's safe to drop Courier from my monospace font stack yet? Would you feel comfortable dropping it? Of course, monospace is my final fallback. Note 1: OS Testbed: WinXP, WinVista, Win7, iPhone, iPad Based on my research, these browsers now substitute Courier New for Courier by default: IE9+ Chrome 2+ Firefox 10+ Safari 3.1+ iDevices Note 2: The default "font-family: monospace;" renders as Courier New in every browser I've tested, from IE6 through the latest iPhone/iPad devices. EDIT: One exception is Opera 12, which renders Consolas on Win. Opera 10 renders Courier New. Note 3: I've noticed that Courier refuses to render with any font smoothing (anti-aliasing) in any browser I've tested, regardless of system and/or browser display settings. Probably because it's an old bitmap font. This could be because of my system setup, however.

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  • Broken Gnome panel after Ubuntu Update

    - by Asaf
    Like every single update on Ubuntu system, my graphical system is completely broken after updating to version 11.10 http://i.imgur.com/YIHfA.png As shown in the image, the date is in the middle of the panel, There are many icons missing (network connection icon, skype) There's no right click menu when I try to right click on the panel and many programs don't have their menus (file,edit,view... those things). How do I fix this? I have gnome-panel, I don't want Unity and I'd rather install windows 95 before I switch to it.

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  • What would you think of a job based on mostly doing the proof of concept?

    - by davsan
    I'm working as a developer in a small software company whose main job is interfacing between separate applications, like between a telephony system and an environment control system, between IP TVs and hospitality systems, etc...And it seems like I am the candidate for a new job title in the company, as the person who does the proof of concept of a new interfacing project and does some R&D for prototyping. What do you think the pros and cons of such a job would be, considering mainly the individual progress/regress of a person as a software engineer? And what aspects would you consider essential in a person to put him/her in such a job position?

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  • Ubuntu installation error on a windows machine

    - by Rahul
    Was trying to install Ubuntu from a CD on a machine which already has windows on it, choose the option of "Resize IDE1 master (hda) and use freed space" during the "Install the base system" step. After that i get the error- "Unable to install initrd-tools. An error was returned while trying to install the initrd-tools package into the target system. Check /target/var/log/bootstrap.log for details. The problem is one one hand i cannot proceed with the complete installation and on other hand if i remove the CD, am not able to boot windows as it says No bootable device. Would highly appreciate for any recommendations.

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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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  • eSTEP Newsletter October 2012 now available

    - by uwes
    Dear Partners,We would like to inform you that the October '12 issue of our Newsletter is now available.The issue contains information to the following topics:News from CorpOracle Announces Oracle Solaris 11.1 at Oracle OpenWorld; Oracle Announces Oracle Exadata X3 Database In-Memory Machine; Oracle Enterprise Manager 12c introduces New Tools and Programs for Partners; Oracle Unveils First Industry-Specific Engineered System - the Oracle Networks Applications Platform,;  Oracle Unveils Expanded Oracle Cloud Offerings; Oracle Outlines Plans to Make the Future Java During JavaOne 2012 Strategy Keynote; Some interesting Java Facts and Figures; Oracle Announces MySQL 5.6 Release Candidate Technical Section What's up with LDoms (4 tech articles); Oracle SPARC T4 Systems cut Complexity, cost of Cryptographic Tasks; PeopleSoft Enterprise Financials 9.1; PeopleSoft HCM 9.1 combined online and batch benchmark,; Product Update Bulletin Oracle Solaris Cluster Oct 2012; Sun ZFS Storage 7420; SPARC Product Line Update; SPARC M-series -  New DAT 160 plus EOL of M3000 series; SPARC SuperCluster and SPARC T4 Servers Included in Enterprise Reference Architecture Sizing Tool; Oracle MagazineLearning & EventsRecently delivered Techcasts: An Update after the Oracle Open World, An Update on OVM Server for SPARC; Update to Oracle Database ApplianceReferencesBridgestone Aircraft Tire Reduces Required Disk Capacity by 50% with Virtualized Storage Solution; Fiat Group Automobiles Aligns Operational Decisions with Strategy by Using End-to-End Enterprise Performance Management System; Birkbeck, University of London Develops World-Class Computer Science Facilities While Reducing Costs with Ultrareliable and Scalable Data Infrastructure How toIntroducing Oracle System Assistant; How to Prepare a ZFS Storage Appliance to Serve as a Storage Device; Migrating Oracle Solaris 8 P2V with Oracle Database 10.2 and ASM; White paper on Best Practices for Building a Virtualized SPARC Computing Environment, How to extend the Oracle Solaris Studio IDE with NetBeans Plug-Ins; How I simplified Oracle Database 11g Installation on Oracle Linux 6You find the Newsletter on our portal under eSTEP News ---> Latest Newsletter. You will need to provide your email address and the pin below to get access. Link to the portal is shown below.URL: http://launch.oracle.com/PIN: eSTEP_2011Previous published Newsletters can be found under the Archived Newsletters section and more useful information under the Events, Download and Links tab. Feel free to explore and any feedback is appreciated to help us improve the service and information we deliver.Thanks and best regards,Partner HW Enablement EMEA

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  • Switch from encrypted partition to unencrypted (Error: cryptsetup: evms_activate is not available)

    - by Chris Lercher
    I initially installed Ubuntu 11.04 with an encrypted file system (from the alternate install CD: Guided Partitioning, LVM encrypted). Now I wanted to change this setup to have my root file system on an unencrypted partition. I had the following setup before: /dev/mapper/my-root on / type ext4 (rw,noatime,errors=remount-ro,commit=0,commit=0) /dev/sda1 on /boot type ext2 (rw,noatime) I backed up /, reformatted /dev/sda5 (which had contained the encrypted LVM device) to an ext3 partition, and restored / to that partition. I edited /etc/fstab, removed the line /dev/mapper/my-root / ..., and added the line: /dev/sda5 / ext3 noatime,rw,errors=remount-ro,commit=0 0 1 I edited /etc/crypttab, and commented out the single entry. On reboot, I get the grub screen as usual, but then I get the message cryptsetup:evms_activate is not available, waiting for encrypted source device. I tried reinstalling Grub2 using a LiveCD with the ChRoot method, but that didn't make any difference. Why is Ubuntu still searching for an encrypted device?

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  • Why UFW has to be (re)started at boot time if it's only iptables rule manager?

    - by Tomasz Zielinski
    README from source package says: When installing ufw from source, you will also need to integrate it into your boot process for the firewall to start when you restart your system. Depending on your needs, this can be as simple as adding the following to a startup script (eg rc.local for systems that use it): # /lib/ufw/ufw-init start For systems that use SysV initscripts, an example script is provided in doc/initscript.example. See doc/upstart.example for an Upstart example. Consult your distribution's documentation for the proper way to modify your boot process. On my system I have this: # /etc/ufw/ufw.conf # # Set to yes to start on boot. If setting this remotely, be sure to add a rule # to allow your remote connection before starting ufw. Eg: 'ufw allow 22/tcp' ENABLED=yes So, why does simple iptables rule manager need to be started at boot time? Is there any secret to that, or it merely checks if all rules are in place ?

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  • OBIEE 11.1.1.5.0 Bundle Patch 2 is available

    - by mshahi
    Oracle BI EE 11.1.1.5.0 Bundle Patch 2 is available. The Patch number is 13611078 and it can be downloaded from Oracle Support (you can download it without password). This patch currently is available on Microsoft Windows x64 (64 bit), Linux x86 - 64 bit, IBM AIX on Power System (64 bit) and Oracle Solaris Sparc (64 bit). Remaining four platforms Win32, Linux32, HP-Itanium, and Solaris x86-64 are expected 3-4 weeks later. This Patch has thoroughly been tested and signed off by BI QA Team.  Important things to know: 1. All the customers are advised to apply this patch as it contains around 248 bug fixes. Please read the README file for all the bug fixes contained in this patch.   2. This patch can be applied via opatch. Please follow the standard process of applying this patch using opatch, i.e. stop all BI System processes via opmnctl, Stop WLS Managed and Admin Servers, Apply Patch, Start WLS Admin and Managed Servers, Check if all the J2EE applications are running fine, Start all BI System Processes via opmnctl command, and verify your fixes. It is advised to test this patch on Non Productions Instances first, run all the required tests / regressions and then move it to Production.    3. This Bundle Patch is cumulative to 11.1.1.5.0 BP1 (13562882) which was released in January 2012 on Linux x86 - 64 bit which contained around 64 bug fixes. Customers who have applied 11.1.1.5.0 BP1, will get expected OPatch conflict message, they can safely roll back BP1 prior to installing this BP2 or let opatch roll back BP1 during its application process.   4. Customer who have applied some one off patches and these one off patches are also part of 11.1.1.5.0 BP2, they can also roll back their existing one off patches after confirming that their fixes are part of BP2.    5. This Bundle Patch is not cumulative on top of 11.1.1.5.0, meaning this bundle patch does not contain all the one off fixes that were delivered on top of 11.1.1.5.0. All the remaining one off fixes delivered so far, will be available in next scheduled bundle patch i.e. 11.1.1.5.0 BP3. Please check the README file and let support know if your existing fixes are not part of BP2, so that support can open One Off Backport (OOB) request to have them included in next patch i.e. BP3.   6. 11.1.1.5.0 BP3 is in planning stages, and dates for it's availability will be announced in next couple of weeks.

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  • PlayOnLinux Unable to find 32bit opengl libraries Dual ATI Videocards

    - by Rodolfo Pires
    Im curently running Ubuntu 12.04 LTS 64Bit So, i installed league of legends fine the first time with the opensource ATI Drivers provided by ubuntu itself with no issues at all, but it runs so slow ... max 20fps because those drivers dont fully support my Dual Graphic cards Than i restored system and i installed the Linux Version of the Proper ATI Drivers from the AMD Website wich supports my APU AMD-A8-4500M with the AMD Radeon 7640G + 7670M Graphics Cards enabling me full performance from my system .. Problem is, to run League of Legends i need a 32bit opengl library, and the driver, automaticly detects a 64bits Linux install and loads the 64bit libraries but not the 32 ones . i need some kind of command, to force the 32bit libraries to load, or to make League of Legends run on the 64 ones .. Im kinda noob to ubuntu .. i installed the 32 bits ones trough terminal and still doesnt work idk why, maybe the driver doesnt want to load them .. plzz help me on this, i dont want to go back to windows just to play league since im noob idk what more details to post here so plz tell me what do you need

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  • Reset Windows Password with Ubuntu Live CD

    - by snix
    A friend brought me his PC with Windows Vista to reset the user password because he didn't use it for a long while and forgot his password. So I found a tutorial on how to reset the password by using a Ubuntu Live CD and the software chntpw. After I installed this software I mounted the SYSTEM partition by opening it with the file explorer. It is now available at /media/SYSTEM/ The tutorial says I have to open the file /windows/system32/config/sam with chntpw and reset the password with chntpw -u USERNAME sam After I did this it didn't show me any errors. So I unmounted the partition and rebooted the PC with the installed Windows Vista. It is still locked with the old password. Did I do any mistakes or is there an other way to reset the password?

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  • How to handle updated configuration when it's already been cloned for editing

    - by alexrussell
    Really sorry about the title that probably doesn't make much sense. Hopefully I can explain myself better here as it's something that's kinda bugged me for ages, and is now becoming a pressing concern as I write a bit of software with configuration. Most software comes with default configuration options stored in the app itself, and then there's a configuration file (let's say) that a user can edit. Once created/edited for the first time, subsequent updates to the application can not (easily) modify this configuration file for fear of clobbering the user's own changes to the default configuration. So my question is, if my application adds a new configurable parameter, what's the best way to aid discoverability of the setting and allow the user (developer) to override it as nicely as possible given the following constraints: I actually don't have a canonical default config in the application per se, it's more of a 'cascading filesystem'-like affair - the config template is stored in default/config.json and when the user wishes to edit the configuration, it's copied to user/config.json. If a user config is found it is used - there is no automatic overriding of a subset of keys, the whole new file is used and that's that. If there's no user config the default config is used. When a user wishes to edit the config they run a command to 'generate' it for them (which simply copies the config.json file from the default to the user directory). There is no UI for the configuration options as it's not appropriate to the userbase (think of my software as a library or something, the users are developers, the config is done in the user/config.json file). Due to my software being library-like there's no simple way to, on updating of the software, run some tasks automatically (so any ideas of look at the current config, compare to template config, add ing missing keys) aren't appropriate. The only solution I can think of right now is to say "there's a new config setting X" in release notes, but this doesn't seem ideal to me. If you want any more information let me know. The above specifics are not actually 100% true to my situation, but they represent the problem equally well with lower complexity. If you do want specifics, however, I can explain the exact setup. Further clarification of the type of configuration I mean: think of the Atom code editor. There appears to be a default 'template' config file somewhere, but as soon as a configuration option is edited ~/.atom/config.cson is generated and the setting goes in there. From now on is Atom is updated and gets a new configuration key, this file cannot be overwritten by Atom without a lot of effort to ensure that the addition/modification of the key does not clobber. In Atom's case, because there is a GUI for editing settings, they can get away with just adding the UI for the new setting into the UI to aid 'discoverability' of the new setting. I don't have that luxury. Clarification of my constraints and what I'm actually looking for: The software I'm writing is actually a package for a larger system. This larger system is what provides the configuration, and the way it works is kinda fixed - I just do a config('some.key') kinda call and it knows to look to see if the user has a config clone and if so use it, otherwise use the default config which is part of my package. Now, while I could make my application edit the user's configuration files (there is a convention about where they're stored), it's generally not done, so I'd like to live with the constraints of the system I'm using if possible. And it's not just about discoverability either, one large concern is that the addition of a configuration key won't actually work as soon as the user has their own copy of the original template. Adding the key to the template won't make a difference as that file is never read. As such, I think this is actually quite a big flaw in the design of the configuration cascading system and thus needs to be taken up with my upstream. So, thinking about it, based on my constraints, I don't think there's going to be a good solution save for either editing the user's configuration or using a new config file every time there are updates to the default configuration. Even the release notes idea from above isn't doable as, if the user does not follow the advice, suddenly I have a config key with no value (user-defined or default). So the new question is this: what is the general way to solve the problem of having a default configuration in template config files and allowing a user to make user-specific version of these in order to override the defaults? A per-key cascade (rather than per-file cascade) where the user only specifies their overrides? In this case, what happens if a configuration value is an array - do we replace or append to the default (or, more realistically, how does the user specify whether they wish to replace or append to)? It seems like configuration is kinda hard, so how is it solved in the wild?

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  • ubuntu cant be installed as it says GPU lock

    - by piyush bhardwaj
    i have win 7 running on my system i just wanna move to ubuntu 12.10 desktop version 36 bit but when i try to install the CD gets loaded start screen comes but suddenly texts line appears and screen goes black the text are - [189.463934] [drm] [noveau] 0000:02:00.0: GPU LOCK- switching to software fbcon [194.248014] [drm] [noveau] 0000:02:00.0: failed to idle channel 1 [199.504009] [drm] [noveau] 0000:02:00.0: failed to idle channel 3 and it goes on.....like this iam new to the linux system so dnt know much abt it ..so if any body can help me to solve my prblm.. my laptop is of HCL and it has 3 gb ram or 350 gb hard disk with nvidia graphic card ..it has 2 ghz pentium dual core it was manufactured in 2009.. so if any body can help i would be greatful and can be able to join ubuntu..

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  • Full disk encryption with seperate boot and encrypted keyfile storage: Two-Form Authentication

    - by Cain
    I am trying to setup true Full Disk encryption with two-form authentication on 12.04 and can not find out how to call a keyfile for the encrypted root out of another encrypted partition. All documentation or questions I am finding for whole or full disk encryption only encrypts separate partitions on the same disk. This is not what most are calling full disk encryption, /boot is not on a partition on the root drive, rather it is on a usb stick as sdx1. Instead root is on a logical partition on top of a LUKS container. Luks is run on the whole disk, encrypting the partition table as well. All drives in the machine are completely encrypted and to open it it requires a USB drive (what I have) as well as a passphrase (what I know) resulting in Two-Form Authentication to boot the machine. Device sdx cryptroot vg00 lvroot / There is no passphrase to open the encrypted root device, only a keyfile. That keyfile is kept on the usb drive with /boot, in its own encrypted partition (I'll call this cryptkey). In order for the root file system (cryptroot) to be opened, initramfs must ask for the passphrase to cryptkey on the usb drive, then use the keyfile inside that to open cryproot. I did manage to find what I think is the how-to I used to do this once before: http://wiki.ubuntu.org.cn/UbuntuHelp:FeistyLUKSTwoFormFactor I already have the system installed and can chroot into it, however, I can not get it to call for the keys on the USB during boot. I did find a how-to saying I needed to make a cryptroot conf for initramfs but, I believe that is for a passphrase: https://help.ubuntu.com/community/EncryptedFilesystemLVMHowto#Notes_for_making_it_work_in_Ubuntu_12.04_.22Precise_Pangolin.22_amd64 I also tried to setup crypttab. However, crypttab only works for drives mounted after the root drive as calling for a keyfile on a device not yet mounted to the system doesnt work. The Feisty how-to included scripts that would be run during boot instructing initramfs to mount the usb drive temporarily and call the keyfile for root which worked quite well except those scripts are outdated now, many of the things they relied on have been merged into something else, changed, or simply don't exist anymore. If I have missed a clear how-to for this, that would be wonderful, I just don't think I have.

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  • Ubuntu Server 13.04.3 doesn't boot w/ EFI

    - by user1004816
    I'm was actually trying to install Debian Wheezy (which failed horribly), then tried Ubuntu Server 13.04 and got the exact same problems as w/ Debian: After installing, the system doesn't show any boot-selection and tells me "Missing operating system". My setup is pretty simple: /dev/sdc - 1TB HDD (+ 3 other NTFS HDD) /dev/sdc1 - EFI, 100MiB, bootable /dev/sdc4 - ext4, 65GiB, Ubuntu/Debian (sdc2 & 3 are NTFS w/ data. Sorta lacking SATA-ports, therefore no OS-only HDD/SSD) Grub seems to be installed on /dev/sdc4, /dev/sdc1 only contains a "EFI"-folder. Not sure if thats correct. I used UNetbootin on OS X to make an 8GB USB-drive bootable and used the standard amd64-iso, running a perl-script wich eradicates a couple of naming-errors (different story). Using this tutorial and actually disabling UEFI and using legacy only dind't work either, the usb drive dind't even bother to boot. I'm pretty clueless here. I'd just like to install and use either Debian oder Ubuntu Server!

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  • Stream audio to mobile device

    - by blackn1ght
    I'd like to stream the audio from Ubuntu 10.10 to my HTC Desire HD (Android 2.2). I've seen solutions so far for streaming from audio players, but I'd like to stream any audio output from the PC to my phone. My use case is for watching TV/Films in VLC or online (BBC iPlayer) in bed, without having to use my surround sound system which is likely to wake up my house mates. I'm not just talking about music from Banshee, but any audio that the system makes. I was thinking that PulseAudio is pretty powerful, is it possible to route audio through that to a mobile device? Can it be done through bluetooth? Cheers in advance!

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  • Why does starting a program log me out?

    - by Bruce McKean
    I'm not a computer nerd but have been able to fix Ubuntu/Linux problems in the pass two years with a Google search but this on has me stumped. I upgraded to 12.04 about thirty days ago and all was well except that every time I tried to load KeePassX it would go to the login screen. I installed KeePass2 and all seemed to work. Last week I tried to load Bibble5 (Raw photo editor) and it would try to load and then back to the login screen. After a few days I gave up and downloaded Corel After Shot Pro (Corel's now owns Bibble5) and it has the same problem. Could someone please head me into the steps I need to follow to find out what is the cause? I'm interested in learning more about the Linux system. How to correct any future problems like this? Computer Specification: Processor : 8x Intel(R) Core(TM) i7-2600 CPU @ 3.40GHz Memory : 8155MB (1092MB used) Operating System : Ubuntu 12.04 LTS Graphics Card : GeForce GT 520/PCIe/SSE2

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