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• How to install CUPS 1.6.3 on Ubuntu 13.04

  - by chmike

  We have a CUPS server 1.3 and my freshly installed Ubuntu 13.04 PC has CUPS client 1.6.2. They are incompatible. On the CUPS web server I saw that CUPS 1.6.3 has fixed the issue. "CUPS 1.6.3 fixes some compatibility issues with servers running CUPS 1.3.12 or older..." So I would like to replace CUPS 1.6.2 with 1.6.3 on my Ubuntu 13.04 PC. I guess Ubuntu 13.10 will have CUPS 1.6.3 and later I would like to upgrade from 13.04 to 13.10. I would thus prefer avoiding installing CUPS 1.6.3 manually to avoid any troubles. Is there a way to install CUPS version 1.6.3 using a ppa or something like that ?

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• How do I disable the "enable/disable wireless" shortcut key on my laptop?

  - by Matthew

  On my Dell Studio XPS 16, I sometimes accidentally hit this key. Wireless becomes disabled, and hitting it again does not re-enable wireless. I have to hit it an odd number of times, then restart my computer to re-enable wireless. I can't imagine a situation in which I would want to disable wireless from my keyboard. Is it possible just disable the key all-together, so I can avoid this problem? On a related note, what package do I file the bug against? I'm happy just disabling the key, but that's really just a workaround.

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• What kind of spam is this?

  - by SSilk

  I realize this is a pretty vague question, but I occasionally get spam messages through my contact form on a Drupal 6 site. The contact form does not have any anti-spam protection (i.e. math question). The messages I get are all very similar and just jumbled junk, like below, so I think they're all from the same source. Example: ylsaf0V bpsdfuxnhjjd, [url=http://wwgfsggzgyjyjm.com/]wwgrfgzrgsjyjm[/url], [link=http://xmgvyghcuufvb.com/]xmjyhvyjyfjirovb[/link], http://frgxmdghrgruhfc.com/ Anyway, I'm just wondering what the point of such a message is. All the links are dead, it's illegible, and it's not trying to sell me a product or get me to do anything, so I'm a bit perplexed. Is there any way to tell where they're coming from? And how concerned should I be? To be clear, I'm not asking how to avoid them, I realize just adding a simple math challenge or captcha would likely do the job.

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• How to remove Recent Item boorkmark from Gnome shell standard "save windows"

  - by Kiwy

  I search all around the internet till the 6th page of result on google with very precise search, but I can't figure how I can do that. I'm working with last updated ubuntu 12.04 and gnome shell, and I wonder how I can REMOVE and I say remove not clear or avoid feeding but remove completly the "recent item" bookmark you can see in the standard save windows of gnome shell here's a picture (in french it's "Récemment utilisés"): Sorry not enought point to post image to see what I talk about, just do that: -open gedit -type anything -save your file -Now that windows got a "recent item" and I want it DOWN I cannot reward point, but I would if I could for the guy finding a solution, and a bonus point if you find a way to remove it every where it appears in gnome shell. Thank you for time. Antoine

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• How can I reduce the time taken to login by postponing/delaying some startup applications?

  - by koushik

  I have setup some applications to startup on each login (e.g., redshift-gtk, gtg) automatically but after adding these to startup applications (System -> Preferences -> Startup Applications) obviously the time taken to login has increased. Due to all this the time it takes for my panels, desktop etc to appear is too long - until which I am forced to wait. I don't need these apps to be available immediately, but it would be good if they startup eventually, meanwhile the ubuntu menu/panel is available for running other apps that I might need to. I tried using at command, with the intention of editing all startup applications to put the commands in the at queue, but this didn't work since the apps don't get the necessary environment variables (like DISPLAY). Is this what nice command is used for? Any other ideas how I can accomplish this? If possible, I would like to avoid editing the startup applications commands, since this would mean a lot of effort to replicate on other machines I use.

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• Is it a good approach to rely on 3rd party software ( not library )?

  - by gunbuster363

  We have program using a call to a winzip program or 7zip commandline tool to zip some files. Once I accidentally uninstall winzip on my computer and making one of our program( created by the programmer already left ) crashed. So we cannot uninstall the winzip program. Now I've come to a point which I need to decide a external tool for gzip in windows or I make a java program which I can call to gzip the file. Obviously a external tool such as 7z is convenient and we can avoid some extra coding with java. On the contrary, if 7z is uninstalled accidentally, our program will crash. What do you think?

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• Adding unit tests to a legacy, plain C project

  - by Groo

  The title says it all. My company is reusing a legacy firmware project for a microcontroller device, written completely in plain C. There are parts which are obviously wrong and need changing, and coming from a C#/TDD background I don't like the idea of randomly refactoring stuff with no tests to assure us that functionality remains unchanged. Also, I've seen that hard to find bugs were introduced in many occasions through slightest changes (which is something which I believe would be fixed if regression testing was used). A lot of care needs to be taken to avoid these mistakes: it's hard to track a bunch of globals around the code. To summarize: How do you add unit tests to existing tightly coupled code before refactoring? What tools do you recommend? (less important, but still nice to know) I am not directly involved in writing this code (my responsibility is an app which will interact with the device in various ways), but it would be bad if good programming principles were left behind if there was a chance they could be used.

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• Category to Page and blocking category url via robots.txt -Good for SEO?

  - by user2952353

  I am using a template which in the pages it allows me to add sidebars / more content under and above the content I want to pull from a category which is very helpful. If I create pages to display my categories content wont the page urls go in conflict with the category urls? By conflict I mean causing a duplicate content error? What I thought might help was to block from robots.txt the category urls of the blog ex. /category/books /category/music Would that be a good practice in order to avoid the duplicate content penalty? Any tips appreciated.

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• This Is a Completely Accurate Illustration of Me at My Last Job [Comic]

  - by The Geek

  Work is boring, what can I say? Usually I was up way too late every night, making the whole situation much worse. It got so bad that one of my co-workers took pictures for blackmail. =) Latest Features How-To Geek ETC How To Colorize Black and White Vintage Photographs in Photoshop How To Get SSH Command-Line Access to Windows 7 Using Cygwin The How-To Geek Video Guide to Using Windows 7 Speech Recognition How To Create Your Own Custom ASCII Art from Any Image How To Process Camera Raw Without Paying for Adobe Photoshop How Do You Block Annoying Text Message (SMS) Spam? Change Your MAC Address to Avoid Free Internet Restrictions Battlestar Galactica – Caprica Map of the 12 Colonies (Wallpaper Also Available) View Enlarged Versions of Thumbnail Images with Thumbnail Zoom for Firefox IntoNow Identifies Any TV Show by Sound Walk Score Calculates a Neighborhood’s Pedestrian Friendliness Factor Fantasy World at Twilight Wallpaper

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• PHP, when to use iterators, how to buffer results?

  - by Jon L.

  When is it best to use Iterators in PHP, and how can they be implemented to best avoid loading all objects into memory simultaneously? Do any constructs exist in PHP so that we can queue up results of an operation for use with an Iterator, while again avoiding loading all objects into memory simultaneously? An example would be a curl HTTP request against a REST server In the case of an HTTP request that returns all results at once (a la curl), would we be better off to go with streaming results, and if so, are there any limitations or pitfalls to be aware of? If using streaming, is it better to replace curl with a PHP native stream/socket? My intention is to implement Iterators for a REST client, and separately a document ORM that I'm maintaining, but only if I can do so while gaining benefits from reduced memory usage, increased performance, etc. Thanks in advance for any responses :-)

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• How can I make my binary file is served as binary and not text when user choose "Save Linked File As..." in Safari?

  - by Eonil

  I'm serving a binary file (.IPA) with Ubuntu/Apache 2.2. When I have chosen Save Linked File As... in Safari, it says it's text file. And it guides me to add .txt extension. However it does not add any extra extension when I download it just clicking link. I added line AddType application/octet-stream .ipa in apache configuration file. I don't know what's wrong with this. Is this a bug of Safari or my misconfiguration? (1) If it caused by bug, how can I avoid this? (2) Or if it caused by misconfiguration, what should I do?

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• Commands to run when Connecting HDMI

  - by yurividal

  Everytime I connect my pc to my tv using my HDMI cable (to watch my movies), I have to manually go to: 1- Monitors, to select "mirror" screen to HDMI 2- Sound, to select the HDMI as default sound output 3- Screen Off an Lock, to avoid screen locking while watching a video. Is there a way I can automate this? Or at least write a script with commands that will do this. (I could manually run a script every time I connect my HDMI, and then run annother one to undo the changes later) How can I do these actions from a Command Line?

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• What is the impact of a CMS on page load time versus a static site?

  - by PleaseStand

  I am creating a 20-page site that will go on shared hosting. Each page will be about 20 KB (including HTML, CSS, and images common to all pages). To avoid manually adding navigation elements to each page, I am considering using a CMS. However, I am concerned that on a busy server, using a CMS would make the site load more slowly. In a shared hosting environment where PHP is run as a CGI binary, how much does a CMS (WordPress, Drupal, etc.) generally affect page load time, compared to both "plain HTML" static sites and those using PHP as merely a templating language?

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• Use unnamed object to invoke method or not?

  - by Chen OT

  If I have a class with only only public method. When I use this class, is it good to use unnamed object to invoke its method? normal: TaxFileParser tax_parser(tax_file_name); auto content = tax_parser.get_content(); or unnamed object version: auto content = TaxFileParser(tax_file_name).get_content(); Because I've told that we should avoid temporary as possible. If tax_parser object is used only once, can I call it a temporary and try to eliminate it? Any suggestion will be helpful.

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• What are some good, simple examples for queues?

  - by Michael Ekstrand

  I'm teaching CS2 (Java and data structures), and am having some difficulty coming up with good examples to use when teaching queues. The two major applications I use them for are multithreaded message passing (but MT programming is out of scope for the course), and BFS-style algorithms (and I won't be covering graphs until later in the term). I also want to avoid contrived examples. Most things that I think of, if I were actually going to solve them in a single-threaded fashion I would just use a list rather than a queue. I tend to only use queues when processing and discovery are interleaved (e.g. search), or in other special cases like length-limited buffers (e.g. maintaining last N items). To the extent practical, I am trying to teach my students good ways to actually do things in real programs, not just toys to show off a feature. Any suggestions of good, simple algorithms or applications of queues that I can use as examples but that require a minimum of other prior knowledge?

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• svn-based versioning tool, problem with network timeout

  - by Scarlet

  My dev team was committed a versioning tool based on Subversion to run on Windows (our svn client is sliksvn). We're developing with Delphi XE2, should that matter. We're asked to implement a "check for updates availability" feature, which has to work as follows: Connect to the SVN repo via svn+ssh protocol; See if there are changes to receive and list them; Let the user decide if he wants to receive changes or not. We don't have a great knowledge on svn, so we thought to implement that thing client side by a certain number of CreateProcess calls that wrap directly proper svn commands. Anyways what we perceived is that if network problems should arise, such like a connection drop, svn client hangs forever waiting for the operation to close instead of failing for timeout. We know that CreateProcess can be given a timeout argument, but it wouldn't be correct to use it, as we can't know from outside how long will be the svn operation taking to complete. Is there any way to avoid that deadlock?

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• How to tile multiple procedurally generated textures?

  - by Burhuc

  I'm trying to develop a procedural tile generator for a game, mostly for the ground tiles, instead of using "hand-drawn" tiles. To achieve this I'm using Perlin noise and a sine wave with multiple parameters, which already gives me pretty nice results. I don't want to generate 1 tile and repeat that one forever for one ground type, but I want to avoid recurrences, so I'm generating n different tiles. The problem I'm having now is that I want to tile the generated textures (smooth transitions). At the moment I have this: 4 256x256 textures. I thought a simple method would be to just add the positions of the different tiles to the noise generation algorithm, so that, when creating the 4 256x256 textures, it would behave like it would create a 512x512 texture, but that somehow didn't work as intented. So how can I tile those textures?

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• What are safe keys to remap in vim?

  - by Weeble

  So far I've been trying to use Vim in as vanilla a configuration as possible, so as to save myself hassle when moving between machines. However, there are a few things I'd really like to bind keys, such as to shorten "_diwP which I use often to delete the word under the cursor and replace it with one from the clipboard. Are there any particular keys that are conventionally reserved for user-defined mappings? The point of this question is mostly that I would like to avoid hassle later on when I decide to install some plugin or take my configuration files to vim on another OS and find that my key mappings clash with something else.

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• Reasonable size for "filesystem reserved blocks" for non-OS disks?

  - by j-g-faustus

  When creating a file system ( mkfs ...) the file system reserves 5% of the space for its own use because, according to man tune2fs: Reserving some number of filesystem blocks for use by privileged processes is done to avoid filesystem fragmentation, and to allow system daemons, such as syslogd(8), to continue to function correctly after non-privileged processes are prevented from writing to the filesystem. But with large drives 5% is quite a lot of space. I have 4x1.5 TB drives for data storage (the OS runs on a separate disk), so the default setting would reserve 300 GB, which is an order of magnitude more than the the entire OS drive. The reserved space can be tweaked, but what is a reasonable size for a data disk? Can I set it to zero, or could that lead to issues with fragmentation?

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• When JDeveloper IDE doesn't render the visual editor

  - by Frank Nimphius

  Though with Oracle JDeveloper 11g the problem of the IDE not rendering JSF pages properly in the visual editor has become rare, there always is a way for the creative to break IDE functionality. A possible reason for the visual editor in JDeveloper to break is a failed dependency reference, which often is in a custom JSF PhaseListener configured in the faces-config.xml file. To avoid this from happening, surround the code in your PhaseListener class with the following statement (for example in the afterPhase method) public void afterPhase(PhaseEvent phaseEvent) {   if(!ADFContext.getCurrent().isDesigntime()){ ... listener code here ... } } The reason why the visual editor in Oracle JDeveloper fails rendering the WYSIWYG view has to do with how the live preview is created. To produce the visual display of a view, JDeveloper actually runs the ADF Faces view in JSF, which then also invokes defined PhaseListeners. With the code above, you check whether the PhaseListener code is executed at runtime or design time.If it is executed in design time, you ignore all calls to external resources that are not available at design time.

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• O'Reilly deal of the week to 23:59 PT 4/Sept/2012 - Master Regular Expressions

  - by TATWORTH

  O'Reilly at http://shop.oreilly.com/category/deals/regular-expressions-owo.do?code=WKRGEX are offering 50% off a range of e-books on mastering Regular Expressions "Take the guesswork out of using regular expressions. Learn powerful tips for matching, extracting, and transforming text as well as the gotchas to avoid. For one week only, SAVE 50% on these e-books and discover a whole new world of mastery over your code." I recommend Mastering Regular Expression to Dot Net developer as it covers the use of regular expressions across a number of environments, including Dot Net.

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• Utility Queries–Database Files, (and Filegroups)

  - by drsql

  It has been a while since I last posted a utility query, and today, to avoid other work I am supposed to be doing, I decided to go ahead and work on another post.  Today, I went ahead and worked on a server configuration type query. One query I find I use pretty often is the following one that lists the files in the database. In this blog I will include 3 queries.  The first will deal with files and databases, and the second runs in a database to see the files and their filegroups (If there...(read more)

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• Why won't videos on a particular website play under Ubuntu 13.04?

  - by Sadi

  Very oddly, I cannot watch any videos a TV channel website, for example this one: http://www.kanald.com.tr/GalipDervis/Videolar/ I can see from the frame source that it contains an embedded Adobe Flash video and some Java scripts (all of which don't pose any problems elsewhere). I've tried different web browsers (Chrome/Chromium/Firefox), but it seems I have some sort of video codec problem in my system. I have installed all sorts of gstreamer plugins, codecs, etc. (maybe too many?) to avoid such problems, but strangely I can watch these videos using Linux Mint 15 Live Session on the same machine. I wonder how I can find out why a particular video (like this one) won't work on my system?

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• How to get presentation tools like windows office without windows office?

  - by ved2254

  On working with MS Office and LibreOffice I found that (as countless have) Libreoffice is not quite up to Windows' level. I would like windows Office on Ubuntu but that means using Wine, which I don't want. I tried using wine but it went a teansy bit wrong (where i have no idea). So I tend to avoid it. Hence the question : Is there any way I can get any program/plugin/patch/anyting-I-missed to get same functionality as MS Office in Ubuntu? I have Ubuntu 12.04 64bit (if required).

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• Java best practice Interface - subclasses and constants

  - by Taiko

  In the case where a couple of classes implements an interface, and those classes have a couple of constants in common (but no functions), were should I put this constant ? I've had this problem a couple of times. I have this interface : DataFromSensors that I use to hide the implementations of several sub classes like DataFromHeartRateMonitor DataFromGps etc... For some reason, those classes uses the same constants. And there's nowere else in the code were it is used. My question is, were should I put those constants ? Not in the interface, because it has nothing to do with my API Not in a static Constants class, because I'm trying to avoid those Not in a common abstract class, that would stand between the interface and the subclasses, because I have no functions in common, only a couple of constants (TIMEOUT_DURATION, UUID, those kind of things) I've read best practice for constants and interface to define constants but they don't really answer my question. Thanks !

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