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  • Many small scripts, one repository or multiple?

    - by The Jug
    A co-worker and myself have run into an issue that we have multiple opinions on. Currently we have a git repository that we are keeping all of our cronjobs in. There are about 20 crons and they are not really related except for the fact that they are all small python scripts and essential for some activity. We are using a fabric.py file to deploy and a requirements.txt file to manage requirements for all of the scripts. Our issue is basically, do we keep all of these scripts in one git repository or should we be separating them out into their own repositories? By keeping them in one repository it is easier to deploy them onto one server. We can use just one cron file for all the scripts. However this feels wrong, as the 20 cronjobs are not logically related. Additionally, when using one requirements.txt file for all the scripts, it's hard to figure out what the dependencies are for a particular script and they all have to use the same versions of packages. We could separate all of the scripts out into their own repositories but this creates 20 different repositories that need to be remembered and dealt with. Most of these scripts are not very large and that solution seems to be overkill. A related question is, do we use one big crontab file for all cronjobs, or a separate file for each? If each has their own, how does one crontab's installation avoid overwriting the other 19? This also seems like a pain as there would then by 20 different cron files to keep track of. In short, our main question and issue is do we keep them all closely bundled as one repository or do we separate them out into their own repository with their own requirements.txt and fabfile.py? We feel like we're also probably looking over some really simple solution. Is there an easier way to deal with this issue?

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  • Blank pale blue screen with Live USB Kubuntu on AMD Sempron 2800+ processor

    - by WGCman
    I am trying to install Kubuntu onto a USB stick to use on my Acer Aspire 1362 laptop with an AMD Sempron 2800+ chip. Using Windows XP, I downloaded and saved to the laptop's hard drive: kubuntu-2.04.1-desktop-i386.iso from the GetKubuntu website and LinuxLive USB Creator 2.8.16.exe from the Linux live website I then installed the latter and ran it, installing the kubuntu onto the Memory stick. Leaving the Bios setup unchanged, the USB stick is ignored and Windows boots. If I change the Bios boot order so that the memory stick takes precedence, I see a dark blue screen announcing Kubukntu 12.04, and on selecting either “live Mode” or “Persistent mode”, messages flash by quickly, some of which appear to be error messages, including “trying to unpack rootfs image as initramfs”, “cannot allocate resource for mainboard”, “no plug and play device found”. Eventually I see a pale blue screen with four moving dots announcing Kubukntu 12.04, similar to the login screen of my Kubuntu desktop, but no invitation to log in or indeed any dialog. After several minutes, this changes to a black screen with more messages including “no caching mode present”, “ADDRCONF(NETDEV_UP): wlan0: link is not ready”, then degrades to a blank pale blue screen which can only be moved by switching the computer off. Finding no way to log the error messages passing by, I managed to photograph most of them, but know no way to attach the photo to this forum. As suggested by User 68186 (to whom thanks!), I have edited my original post to reflect the recent progress, so the following two comments are now superseded.

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  • Blank screen after GRUB (64 bit) - cannot install Ubuntu

    - by peGGi
    My laptop's specs: Lenovo IdeaPad Z570 Intel Core i5-2410M @ 2.3Ghz 6 Gb RAM DDR3 640 Gb ATAPI Hard-disk Drive @ 5,200 RPM NVIDIA GeForce G520M with Optimus switching technology Broadcom 802.11n Network Adapter REALTEK soundcard Windows 7 Home Premium 64-bit I downloaded Ubuntu Studio 11.04 and burned the iso image onto two different DVDs, using two different programs (one DVD is RW, the other is just R). I verified the hash MD5sum thing. I get as far as GRUB with the 4 options (install, advanced install, disk verification, system rescue) but no matter which one I select, I get a blank screen and nothing happens. The DVD drive spins down after about 30 seconds. Also just before the GRUB screen I get a message saying Error: "Prefix" is not set. I'm not sure if that's relevant. I have tried all the options using both DVDs. Same thing happens. I have changed the graphics setting in BIOS to UMA or Optimus, but still happens either way. I've tried booting with the wireless switch turned off, same thing happens. I downloaded 'vanilla' Ubuntu 64-bit and burned onto a CD, and the same thing happens. I have downloaded Ubuntu 32-bit and I am able to boot from the live CD (interestingly the wireless card won't work, but that's maybe another issue). I have searched extensively through these forums and other sites but I can't see anything that will help me. Is there something I'm missing? I'd really appreciate help on this. The laptop is less than 2 weeks old. I was so looking forward to getting Ubuntu Studio up and running. I've gone about as far as my technical abilities will allow.

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  • How programmers can afford to NOT learn new things.

    - by newbie
    Good day! I am wondering how programmers learn many things because as a career shifter (from engineering to IT), I find it really hard to absorb everything. Three months ago, I learned HTML/CSS/Javascript. Two months ago, I learned mySQL and CCNA1. One month ago I learned C and Java. Now I am trying to learn J2EE. But it seems that I must combine everything I learned then add more into my brain (especially because J2EE is HUGE! -- XML, servlets, JSP, JSTL, EJB, frameworks(Hibernate, Structs, Spring), JDBC... and so on!!!) So I am wondering, how can programmers learn everything, then add something new without being confused of everything! Because Right now, I feel like my brain is going to explode because of information overload! And these knowledge I am trying to acquire are just the BASICS of programming (icing on the cake)! I still need to learn MORE to become a good programmer! And new technology emerges now and then that requires programmers to learn more again.. Learn.. learn.. learn... Any suggestions on how you as a programmer fit all you've learned into your brain? And how do you know which is the right thing for you to learn? Aren't you afraid that what you've learned may be obsolete next year then start learning again...?

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  • How do I start my career on a 3-year-old degree [on hold]

    - by Gabriel Burns
    I received my bachelor's degree in Com S (second major in math) in December 2011. I didn't have the best GPA (I was excellent at programming projects and had a deep understanding of CS concepts, but school is generally not the best format for displaying my strengths), and my only internship was with a now-defunct startup. After graduation I applied for several jobs, had a fair number of interviews, but never got hired. After a while, I got somewhat discouraged, and though I still said I was looking, and occasionally applied for something, my pace slowed down considerably. I remain convinced that software development is the right path for me, and that I could make a real contribution to someones work force, but I'm at a loss as to how I can convince anyone of this. My major problems are as follows. Lack of professional experience-- a problem for every entry-level programmer, I suppose, but everyone seems to want someone with a couple of years under their belt. Rustiness-- I've not really done any programming in about a year, and since school all I've really done is various programming competitions and puzzles. (codechef, hackerrank, etc.) I need a way to sharpen my skills. Long term unemployment-- while I had a basic fast-food job after I graduated, I've been truly unemployed for about a year now. Furthermore, no one has ever hired me as a programmer, and any potential employer is liable to wonder why. Old References-- my references are all college professors and one supervisor from my internship, none of whom I've had any contact with since I graduated. Confidence-- I have no doubt that I could be a good professional programmer, and make just about any employer glad that they hired me, but I'm aware of my red flags as a candidate, and have a hard time heading confidently into an interview. How can I overcome these problems and keep my career from being over before it starts?

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  • Can't install Ubuntu, black screen after install

    - by Tyrone
    I tried several times, but wasn't able to make it work. I tried all recent types of Ubuntu but it didn't work. Then I tried acpi=off at the beginning of the installation. In this way I could finish the installation. But after the restart Ubuntu didn't work. Only a black screen appeared. Before that I tried it on the VirtualBox and it work. By the way my system is the following: (I use windows 7 currently) Processor AMD Athlon II P320 (2,1 GHz, second-level cache 2 ? 512 KB, HT 1600 MHz bus) Chipset AMD M880G + SB850 Memory Dual Channel, 3 GB DDR3-1066 Wide Screen 15.6 “high-definition (1366 ? 768) c LED-backlit, AU Optronics B156XW02 Video Card AMD Radeon HD 4250, from 336 MB video buffer in memory, support for DirectX 10.1 and UVD Sound system: HDA-codec IDT 92HD81B1X AMD HDMI Audio Hard drive WDC WD3200BEVT-75A23T0 (298 GB, 5400 RPM, SATA 2.0) Optical Drive: DVD ± RW Optiarc AD-7585H Communication tools Fast Ethernet (10/100 Mbit / c) Realtek RTL8102E/RTL8103E WiFi 802.11a/b/g Broadcom BCM4310 Bluetooth 2.1 + EDR Card reader Memory Card Reader 7-in-1 with support for SD / SDHC / MMC / MS / xD, and derivatives Interfaces / ports 3 USB 2.0 1 eSATA + USB 2.0 15-pin video connector VGA HDMI RJ-45 Ethernet 10/100 Mbit / c 2 analog mini-jack: a microphone / headphone jack for a Kensington lock slot AC adapter Battery Li-Ion 6-cell capacity of 4400 mA ? h (10,8, 48 W ? hr) AC power adapter 65 Watt Additional equipment integrated web-camera (1.3 mega pixels)

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  • Need alternative to Accessibility's "Locate Pointer" to visually highlight the mouse.

    - by fred.bear
    Update: See end of quetion: A black-on-white cross-hair/I-bar mouse-pointer is soemtimes hard foe me to spot in amongst black-on-white text. I've tried "Accessibility / Mouse Accessibility / Locate Pointer" .. which will: Show pointer position when Control is presssed It works (to a point), but it does have a notable problem, which renders it inpractical. It has the uncanny side-effect of disallowing all Control key navigation while editing a file/dir name in Nautilus (F2).. Just touching the Control key drops it out of edit mode, which means I can't keyboard paste, move-L/R word etc... So, I'm looking for an alternative. I've tried Compiz's Water Effect, but I need something which is sharper, faster, and localized to the pointer. Compiz's Show Mouse (with fire) is no suitable. I'm really lookingf for an analog of "Accessibility / Locate Pointer": * ie. I hit Control (only).. and it blips a quick visual pulse. UPDATE: I've just realized why I can't find my mouse so often! ... It's because it is isn't there !!! ... Two apps I use a lot, Gedit and Konsole (KDE Terminal; it renders unicode better), ... dissolve the mouse-pointer to invisible after the first key is typed ... and Konsole does it after a few seconds of idle-time... like a video-player option: "hide the mouse".. Well I don't use the mouse much, and I thought it was juse my eyesight (which does rely a lot on Compiz's zoom)... I discovered it when I installed a "novelty" app, called Geyes from gnome-applets ("A goofy set of eyes for the GNOME panel. They follow your mouse.") ... It could follow the mouse better than me! :)

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  • For a Javascript library, what is the best or standard way to support extensibility

    - by Michael Best
    Specifically, I want to support "plugins" that modify the behavior of parts of the library. I couldn't find much information on the web about this subject. But here are my ideas for how a library could be extensible. The library exports an object with both public and "protected" functions. A plugin can replace any of those functions, thus modifying the library's behavior. Advantages of this method are that it's simple and that the plugin's functions can have full access to the library's "protected" functions. Disadvantages are that the library may be harder to maintain with a larger set of exposed functions and it could be hard to debug if multiple plugins are involved (how to know which plugin modified which function?). The library provides an "add plugin" function that accepts an object with a specific interface. Internally, the library will use the plugin instead of it's own code if appropriate. With this method, the internals of the library can be rearranged more freely as long as it still supports the same plugin interface. This could also support having different plugin interfaces to modify different parts of the library. A disadvantage of this method is that the plugins may have to re-implement code that is already part of the library since the library's internal functions are not exported. The library provides a "set implementation" function that accepts an object inherited from a specific base object. The library's public API calls functions in the implementation object for any functionality that can be modified and the base implementation object includes the core functionality, with both external (to the API) and internal functions. A plugin creates a new implementation object, which inherits from the base object and replaces any functions it wants to modify. This combines advantages and disadvantages of both the other methods.

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  • Oracle Database 12c and Oracle Solaris 11 DTrace

    - by Larry Wake
    As you may have heard, Oracle Database 12c is now available for Oracle Solaris and Oracle Linux. Among other things, that means we now have the opportunity to share some of the cool things the Oracle Database and Oracle Solaris engineering teams have been doing together. And here's a good one: In this screencast, Jon Haslam describes how on Oracle Solaris 11, DTrace is now integrated into Oracle Database V$ views to provide a top-to-bottom picture of a database transaction I/O -- from storage devices, through the Oracle Solaris kernel, up to Oracle Database 12c itself: With this end-to-end view, you can easily identify I/O outliers -- transactions that are taking an unusually long time to complete -- and use this comprehensive data to identify and mitigate storage system problems that were previously extremely hard to debug. This is a great example of the power of DTrace, which is just about to celebrate its 10th anniversary in the wild. The screencast has some nice examples of DTrace's power on its own, as well as diving into the DTrace/Oracle Database 12c synergy. There's more, of course.  Over on the OTN Garage blog, Rick Ramsey has put together a nice compendium of ways the OS makes the database scream, and Ginny Henningsen's written an article on the same topic.  And, we've also got an OTN page that digs further into Oracle Database / Oracle Solaris synergies.

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  • A Modern Marketing Marvel: Eloqua Experience 2013

    - by kristin.jellison
    Hey there, partners— You’d be hard pressed to find a more convincing example of modern marketing than the one that descended upon San Francisco last week. We’re talking about Eloqua Experience 2013, of course. It is remarkable that a marketing technology conference has become a case study in successful 21st-century marketing practices. Eloqua Experience 2013 (#EE13) was all about customer-focused, targeted messaging, multichannel content, analytics and real-time multiscreen engagement. It made for a busy, yet interactive experience for over 2,000 eager attendees. This year’s event brought together some of the world’s most innovative marketers for three days of immersive sessions covering marketing best practices, customer stories and deep-dive technical classes. With 70 breakout sessions, product announcements, and a special conversation with Vince Gilligan, creator and executive producer of “Breaking Bad,” #EE13 brought a lot of critical marketing news to light. Oracle’s goal: to make sure our partners stay updated. As you know, Eloqua joined Oracle in late 2012, further rounding out our Customer Experience applications platform. Eloqua is a marketing automation solution and marketing cloud centerpiece that partners can use to target the right buyers, easily execute campaigns, bring leads to sales and bring in high ROIs. The resources below will help you stay on top of the industry’s best practices for marketing, plus all the advantages Eloqua can bring to partners. Partner Opportunities and Strategy with Eloqua The latest Eloqua partner strategy. Interview with Oracle Eloqua GM Kevin Akeroyd on Eloqua Experience A short recap of 2013’s Experience. Eloqua Product Announcements John Stetic, VP of Products for Oracle Eloqua, highlights the top product news, including a new profiler app and the ability to integrate display advertising into multichannel campaigns. Eloqua Experience Highlight Reel See what all the bustle was about. Eloqua Experience Session Overviews A quick look at what the keynote and breakout sessions covered, with links to session content. Modern Marketing Essentials Library Tips, blueprints, and strategies for success based on the 5 Tenets of Modern Marketing. Over and out, Your OPN Marketing Allies

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  • Problems installing Ubuntu server and desktop

    - by Rufus
    google translate Good afternoon I'm new to linux, I have to install a proxy and to them I decided on Ubuntu, the problem is that it took several days trying to install Ubuntu on any version and when installing i get error [Errno 5] input / output error says that is because the disc (cd or dvd) is bad or faulty change it and save all denuevo but I get the same error try changing the hard drive to see if my drive had no problem and I also get the same error , the machine where I want to mount the Ubuntu is a P4 with 1GB rAM and 40GB disk is more than the minimum requirements for even so I get the error ... I would like someone could help me thank you very much ..... original Problemas al instalar Ubuntu server y desktop Buenas tardes soy nuevo en linux, tengo que instalar un proxy y para ellos me decidi por Ubuntu, el problema es que llevo varios dias tratando de instalar Ubuntu en cualquiera de sus versiones y al momento de instalar me sale error [Errno 5] input/output error dice que se debe a que el disco (cd o dvd) esta malo o defectuoso lo cambie y grabe todo denuevo pero me sale el mismo error trate de cambiar el disco duro para ver si no tenia problema mi disco y tambien me sale el mismo error, la maquina donde quiero montar el Ubuntu es un p4 con 1gb ram y disco de 40gb, es mas de los requerimientos minimos por aun asi me sale el error... me gustaria que alguien me pudiera ayudar muchas gracias.....

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  • What is the right way to Windows 7/Ubuntu 10.10 Dual-Triple Boot Partitioning for Laptop OEM?

    - by Denja
    Hi Linux Community, I find my self struggling with the ever slow and buggy windoze OS once again. It's Time to change with the Ubuntu 10.10 64bit as a really faster Operating System. My Hard Disk laptop as a RECOVERY and HP_TOOLS partition they are both Primary. I Have the System Recovery DVD for Windows 64bit should anything happen. Here's the layout I used with windows before: * (C:) Windows 7 system partition NTFS - 284,89GB (Primary,Boot,Pagefile,Dump) * HP_TOOLS system partition FAT32 - 99MB (Primary) * (D:) RECOVERY partition NTFS - 12,90GB (Primary) * SYSTEM partition NTFS 199MB (Primary) Here's the layout I want to make based on your answers * (C:) Windows 7 system partition NTFS - 60GB (Primary) (sda1) * (D:) Windows DATA partition (user files) NTFS - 120GB(Primary)(sda2);wanna share with Linux * Linux root Ext4 - 100GB (Primary)(sda3) (Ubuntu 10.10 64bit) * Linux swap swap- RAM size, 3GB (sda4) * Linux root Ext3- 15,9GB (Extended)(sda5) (OpenSuse or Puppy) Here is my New Ubuntu 10.10 64bit layout in use now: * SYSTEM partition NTFS 199MB (Primary) (sda1) **Partition 1 does not end on cylinder boundary.(?)** * (C:) Windows 7 system partition NTFS - 90GB (Primary) (sda2) * (D:) Windows 7 RECOVERY partition NTFS - 12,90GB (Primary) (sda3) * Linux system partition EXTENDED - 195GB (Logical) * Linux root Ext4- 10GB (Extended) (sda5) * Linux home Ext3- 185GB (Extended) (sda6) I didn't know if I could wipe all previous partitions when i installed Ubuntu because of the RECOVERY partition so I just made the space for my extended partition by deleting the HP_TOOLS (Fat32). By doing this I managed to make and successfully install Ubuntu 64 but I couldn't actually make the partition for the swap or a third Linux OS. Question 1: What is the right way to Windows 7/Ubuntu 10.10 Dual-Triple Boot Partitioning for Laptop OEM?? Thank you in advance for your advises and suggestions and Happy New Year to All!!

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  • Making LISPs manageable

    - by Andrea
    I am trying to learn Clojure, which seems a good candidate for a successful LISP. I have no problem with the concepts, but now I would like to start actually doing something. Here it comes my problem. As I mainly do web stuff, I have been looking into existing frameworks, database libraries, templating libraries and so on. Often these libraries are heavily based on macros. Now, I like very much the possibility of writing macros to get a simpler syntax than it would be possible otherwise. But it definitely adds another layer of complexity. Let me take an example of a migration in Lobos from a blog post: (defmigration add-posts-table (up [] (create clogdb (table :posts (integer :id :primary-key ) (varchar :title 250) (text :content ) (boolean :status (default false)) (timestamp :created (default (now))) (timestamp :published ) (integer :author [:refer :authors :id] :not-null)))) (down [] (drop (table :posts )))) It is very readable indeed. But it is hard to recognize what the structure is. What does the function timestamp return? Or is it a macro? Having all this freedom of writing my own syntax means that I have to learn other people's syntax for every library I want to use. How can I learn to use these components effectively? Am I supposed to learn each small DSL as a black box?

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  • How do I allow e-mail to be relayed through this MTA?

    - by BlueToast
    When I try to send an e-mail using authenticationless relay via telnet, I receive an error message "553 sorry, that domain isn't allowed to be relayed thru this MTA (#5.7.1) rcpt to:[email protected]". How can I allow a specific domain to be whitelisted and allowed through the MTA? There is only one domain I am trying to relay e-mails to (and that domain uses a totally different, independent and standalone mail server with IceWarp). 220 mail4.myhsphere.cc ESMTP ehlo sisterwebsite.com 250-mail4.myhsphere.cc 250-PIPELINING 250-8BITMIME 250-SIZE 41943040 250-AUTH LOGIN PLAIN CRAM-MD5 250 STARTTLS mail from:[email protected] 250 ok rcpt to:[email protected] 553 sorry, that domain isn't allowed to be relayed thru this MTA (#5.7.1) rcpt to:[email protected] 553 sorry, that domain isn't allowed to be relayed thru this MTA (#5.7.1) rcpt to:[email protected] 553 sorry, that domain isn't allowed to be relayed thru this MTA (#5.7.1) rcpt to:[email protected] 250 ok data 354 go ahead To: [email protected] From: [email protected] Subject: Test mail -- please ignore Test, please ignore this Jane Sincerely, BlueToast . 250 ok 1350407684 qp 22451 quit 221 mail4.myhsphere.cc Connection to host lost. C:\Users\genericaccount Not sure what to do. I did some Googling but I'm having a hard time finding relevant results. Most of the search results I get are about trying to receive mail -- but I am trying to send mail. mail.sisterwebsite.com = mail4.myhsphere.com. We use FluidHosting for the e-mail on sisterwebsite.com. (Repeating question just in case) How can I allow a specific domain to be whitelisted and allowed through the MTA?

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  • Is it OK to reoccupy my old GitHub username to protect repository redirections?

    - by Idan Arye
    I'm considering changing my GitHub username from the old alias I was using as a kid to my real name. I'm concerned about my repository URLs. GitHub will redirect the old URLs, but if someone creates a new account using my old username and creates a repository with the same name as one of my repositories, the URL redirection will break and the URL will lead to their repository, not mine. Now, this is understandable, and GitHub recommends to not count on the redirect in the long term, and update all the remotes, but I'm concerned about some Vim plugins I'm hosting on GitHub. It's a common practice to manage Vim plugins with Git(either as separate repositories or as submodules), and if one of the plugins' remotes break you'll get error messages when you try to batch-update all your plugins(it happened to me once...). It's not that hard to solve, and the chances that'll happen are slim, but I would still like to avoid causing trouble to the users of my plugins... To prevent this, I think to create a new account with my old username. That way I can avoid the risk of someone else taking my old username and breaking the redirects of my old repositories. While researching this approach I've found GitHub's Name Squatting Policy. According to that policy, GitHub can delete or rename inactive accounts. To my understanding, they do this to prevent Cybersquatting, but surely this isn't the case with my fake account - I'm not holding someone else's name in an attempt to sell it to them, I'm merely occupying a name I was using to protect my old URLs... So, is it acceptable to go with this plan an create a fake account with my old username?

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  • Inverted LACK Table Serves as a Perfect Gear Rack [DIY]

    - by Jason Fitzpatrick
    We’ve seen IKEA gear hacked to hold audio and computer gear before, but this mod adds in a simple and effective twist. LACK end tables are, conveniently, the same width as a standard server rack. This makes it super simple for DIYers to mount their gear right into the legs of the table with no modification necessary. In this case, however, Winston Smith included a clever update to the mod. Rather than leave it like a standard table, he flipped the table upside down for increased stability and a stronger connection between the legs of his improvised audio rack and the table-top-turned-floor-plate. He then finished it with a matching LACK shelf piece to serve as a turn-table stand. His gear is stored cleanly, off the floor, and in a sturdy container all for about $25–a definite bargain when it comes to storage racks. Hit up the link below for more information and pictures. LACK Rack & EXPEDIT Desktop [IKEA Hackers] HTG Explains: How Windows Uses The Task Scheduler for System Tasks HTG Explains: Why Do Hard Drives Show the Wrong Capacity in Windows? Java is Insecure and Awful, It’s Time to Disable It, and Here’s How

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  • How to add a permanent redirect (301) for an htm file in IIS 7

    - by bconlon
    Looking in Web Analytics I could see several external sites pointing at an old .htm file on my web server that no longer existed, so I thought I would get IIS to redirect to the new .aspx replacement. How hard could it be? This has annoyed me for quite a while today so here is the answer. 1. Install the Http Redirection module - this is not installed by default!! Windows 7 Start->Control Panel->Programs and Features->Turn Windows Features on or off. Internet Information Services->World Wide Web Services->Common Http Features->HTTP Redirection. Windows Server 2008 Start->Administrative Tools->Server Manager. Roles->Web Server (IIS). Role Services->Add Role Services. Common Http Features->HTTP Redirection. 2. Edit your web.config file <configuration>     .....     <location path="oldfile.htm">         <system.webServer>             <httpRedirect enabled="true" destination="/newfile.aspx" exactDestination="true" childOnly="true" httpResponseStatus="Permanent" />         </system.webServer>     </location>     ..... </configuration> When a user clicks or Google crawls ‘oldfile.htm’ it will get a permanent redirect to ‘/newfile.aspx’ - and should take any Page Rank to the new file.  #

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  • Must developers understand the business domain or should the specification be sufficient?

    - by Jerome C.
    I work for a company for which the domain is really difficult to understand because it is high technology in electronics, but this is applicable to any software development in a complex domain. The application that I work on displays a lot of information, charts, and metrics which are difficult to understand without experience in the domain. The developer uses a specification to describe what the software must do, such as specifing that a particular chart must display this kind of metrics and this metric is the following arithmetic formula. This way, the developer doesn't really understand the business and what/why he is doing this task. This can be OK if specification is really detailled but when it isn't or when the author has forgotten a use case, this is quite hard for the developer to find a solution. At the other hand, training every developer to all the business aspects can be very long and difficult. Should we give more importance to detailled specification (but as we know, perfect specification does not exist) or should we train all the developers to understand the business domain? EDIT: keep in mind in your answer that the company could used external developpers.

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  • Adding complexity by generalising: how far should you go?

    - by marcog
    Reference question: http://stackoverflow.com/questions/4303813/help-with-interview-question The above question asked to solve a problem for an NxN matrix. While there was an easy solution, I gave a more general solution to solve the more general problem for an NxM matrix. A handful of people commented that this generalisation was bad because it made the solution more complex. One such comment is voted +8. Putting aside the hard-to-explain voting effects on SO, there are two types of complexity to be considered here: Runtime complexity, i.e. how fast does the code run Code complexity, i.e. how difficult is the code to read and understand The question of runtime complexity is something that requires a better understanding of the input data today and what it might look like in the future, taking the various growth factors into account where necessary. The question of code complexity is the one I'm interested in here. By generalising the solution, we avoid having to rewrite it in the event that the constraints change. However, at the same time it can often result in complicating the code. In the reference question, the code for NxN is easy to understand for any competent programmer, but the NxM case (unless documented well) could easily confuse someone coming across the code for the first time. So, my question is this: Where should you draw the line between generalising and keeping the code easy to understand?

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  • Help in decide the partition to install ubuntu

    - by G.Ashwin kumar
    I have a PC running with windows 7 ultimate 64 bit version with 4 gig Ram. I have a 320 gig hard disk , in which I have allocated 120 gig for windows 7, 100 gig for NY files(named ashwin in windows) and rest 80-90 gig partitioned but empty NTFS partition.Now where do I install Ubuntu so that windows and data is safe. I got the option install with windows I selected it , it then shows select drive(SCSI1 (0,0,0) (sda) -320.1 GB ATA WDC WD3200AAJS-6) and allocate driver by dragging the divider below which shows 66.5gb and 59.3 GB respectively. Which one do I go with? I clicked advance partitioning it shows five devices: device , type, m.point ,size.(mb), used(mb)......... /dev/sda1, NTFS, 104 , 35 (windows 7 loader) /dev/sda2, NTFS, 104752, 23604 /dev/sda3, NTFS, 125829, 10161 /dev/sda5, NTFS, 89382, 3221 when I checked size in properties it showed name of drive according to windows, used.Gb, free, total. ashwin, 10.2, 115.7, 125.8 c drive, 23.6, 81.1, 104.8 new volume, 92.6mb, 89.3, 89.4 except mentioned everything in gigabytes.ignore the last dots. I want to install it in new volume or using that space how do I do it? Explain in detail I'm a beginner.

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  • Inspiring the method of teaching. Example- C++ :)

    - by Ashwin
    A year ago I graduated with a degree in Computer Science and Engineering. Considering C++ as the first choice of programming language I have been in the process of learning C++ in many ways. At first - five years back - I had many conceptions, most of which were so abstract to me. It started when I knew almost everything about Structs in C and nothing about Classes in C++. I went through a great time experimenting them all and learning a lot. I had a hard time evaluating Procedural programming vs Object-Oriented Programming. Deciding when to choose Procedural or Object-Oriented Programming took a great deal of patience for me. I knew that I cannot underestimate any of these Programming styles... Though Procedural programming is often a better choice than simple sequential unstructured programming, when solving problems with procedural programming, we usually divide one problem into several steps in order regarded as functions. Then we call these functions one by one to get the result of the problem. When solving problems with Object Oriented Priciples we divide one problem into several classes and form the interaction between them. Evaluating these two at the beginning (as a learner) required a lot of inspiration and thoughts. Instructing to think step by step. Relative concepts to understand deeply. Intensive interests to contrast both solving in both POP and OOP. If you were ever a mentor: What ideas/methods would you teach to students in which it will Inspire them to learn a programming language (in general, computer sciences)?

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  • Ubuntu 13.04 client cannot connect to Raspbian samba share

    - by envoyweb
    I have a client Ubuntu 13.04 machine trying to connect to a server running Raspbian with samba and samba-common-bin installed on the server I can see my share and when I try to login I get this error: Unable to access location: Failed to write windows share Cannot allocate memory. I have installed ntfs-3g for the usb hard drive that already auto mounts on the server so I never had to create a directory or edit fstab. Testparm on the server states the following: [global] workgroup = ENVOYWEB server string = %h server map to guest = Bad User obey pam restrictions = Yes pam password change = Yes passwd program = /usr/bin/passwd %u passwd chat = *Enter\snew\s*\spassword:* %n\n *Retype\snew\s*\spassword:* %n\n *password\supdated\ssuccessfully* . unix password sync = Yes syslog = 0 log file = /var/log/samba/log.%m max log size = 1000 dns proxy = No usershare allow guests = Yes panic action = /usr/share/samba/panic-action %d idmap config * : backend = tdb [homes] comment = Home Directories valid users = %S create mask = 0700 directory mask = 0700 browseable = No [printers] comment = All Printers path = /var/spool/samba create mask = 0700 printable = Yes print ok = Yes browseable = No [print$] comment = Printer Drivers path = /var/lib/samba/printers [BigDude] comment = Sharing BigDude's Files path = /media/BigDude/ valid users = @users read only = No create mask = 0755 testparm on the client which is running ubuntu is as follows [global] workgroup = ENVOYWEB server string = %h server (Samba, Ubuntu) map to guest = Bad User obey pam restrictions = Yes pam password change = Yes passwd program = /usr/bin/passwd %u passwd chat = *Enter\snew\s*\spassword:* %n\n *Retype\snew\s*\spassword:* %n\n *password\supdated\ssuccessfully* . unix password sync = Yes syslog = 0 log file = /var/log/samba/log.%m max log size = 1000 dns proxy = No usershare allow guests = Yes panic action = /usr/share/samba/panic-action %d idmap config * : backend = tdb [printers] comment = All Printers path = /var/spool/samba create mask = 0700 printable = Yes print ok = Yes browseable = No [print$] comment = Printer Drivers path = /var/lib/samba/printers

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  • Browser language detection & content ranking for new language on the same site.

    - by Arnaud
    I've been reading a lot about it but it's still really hard to make up my mind. My understand is that if your website provide a link to the other language, this should not be an issue for google as long as your links are clear and clean, google will be able to make his way through it. The website was orginaly in french and I added the english version and I'm just worry that english speaker will just leave if the site is not in the correct language, for the home page I just wanted to get the value from the browser and redirect it to /fr/ or /en/ for the first page. (using php this will be very easy) Could you guys have a look at it and tell me what you think about it http://tinyurl.com/bpc5bn9 I don't want to get it wrong and lost my ranking with google. Also the website has good rank on the french side and the english has been online for 2 weeks and only get few visit a day, is that because all the back link refer to /fr/ and google is cleaver enough to decide that they are 2 differantes website and the back link will have to point to /en/ to increase the ranking value? Or will take few more weeks for the website to grow? Thanks for your hep

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  • Designing rules to fight smallpox in Civ-style TBS games

    - by Williham Totland
    TL;DR: How do you design a ruleset for a Civ-style TBS game that prevents city smallpox from being a profitable or viable strategy? Long version: Civ-style games are pretty great. Bringing a civilization from cradle to grave is a great endeavor, and practicing diplomacy with hard-line human players is fun and challenging. In theory. In practice, however, many of these games has, especially in multiplayer, exactly one viable strategy: City smallpox, a.k.a. infinite city spread, a.k.a. covering all available space with 1-citizen cities, packed as tight as they will go. I suppose this could count as emergent gameplay, but still; it could hardly be considered to be in the spirit of the class of game. The Civilization series, of course, is stuck in their more or less fixed rule sets, established with Civilization. Yes, there have been major changes in some respects, but the rules pertaining to city building and maintenance have stayed pretty similar. So the question, then: If you build a ruleset for a TBS from the ground up; what rules should be in place to prevent Infinite City Sprawl from being a viable strategy? Or should ICS be a viable strategy?

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  • Horse Drawn Fiber Optics Bring Broadband to Remote Areas

    - by Jason Fitzpatrick
    When you think of fiber optics and high speed internet the last thing you likely think of is… horses. Yet horses have been put to use rolling out fiber optics to remote rural locations. In Vermont a Belgium draft horse named Fred, seen in the photo above being tended by his handler Claude, is a distinctly 19th century solution to a 21st century problem; how to run fiber optic cable through remote areas where trucks cannot easily pass. The man and animal are indispensable to cable and phone-service provider FairPoint Communications because they easily can access hard-to-reach job sites along country roads, which bulky utility trucks often cannot. “It just saves so much work – it would take probably 15 guys to do what Fred and Claude can do,” said Paul Clancy, foreman of a line crew from FairPoint. “They can pull 5,000 feet of cable with no sweat.” You can read more about the use of draft horses to draw lines and the roll out of broadband to rural Vermont at the link below. Vermont Uses Draft Horse to Lay Cables for Internet Access [Reuters] How To Encrypt Your Cloud-Based Drive with BoxcryptorHTG Explains: Photography with Film-Based CamerasHow to Clean Your Dirty Smartphone (Without Breaking Something)

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