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• Developing an Interface to a Dynamic System

  - by radix07

  I work for a small company and have been designing a GUI to interface our embedded system. The problem with this embedded system is that it is not a finished product (may never be) and is constantly under development and being tweaked and updated for different customers and applications in small volumes. So to deal with this I made a program that can export all the data from a spreadsheet where most of the embedded system variables are sourced from and throw them into a small database for the GUI application to use. This database program I made also spits out a cross reference file for the embedded system which allows the GUI to look up all the variables. This system works pretty well so far, and is even integrated with version control among the GUI, database, and embedded system. The big problem is that there is constant development on several projects that use this system and it gets terribly tedious to keep the system up to date and bring in new changes. This has gotten to the point to where I have had to code the GUI to dynamically (generically) generate all interfaces since I am never guaranteed to find the same data the same way. I have not been able to come up with a good way to uniquely identify the data I import from excel since all fields are able to be changed (due to engineering stubbornness, code re-factoring and/or excel issues) and I cannot assign a fixed reference within the sheet itself. So, are there any good methods or ideas on how to handle the chaos?

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• Upgraded from 11.4 to 11.10, There was an error, now the system won't initiialize

  - by Eric

  This morning the system gave me a message that my Version (11.4) was no longer supported, and I took the 'upgrade' option (- 11.10). While installing the various components I encountered a message to the effect that the there was an error and the system may have become unusable. Among the messges: E:Sup-process /usr/bin/dpkg received a segmentation fault...returned an error code (1). I was given an option to do several things, one of which seemed to mean that it would attempt to roll back to the previous version (the default), which I took. After the process ran it said the upgrade process had finished, but there were errors. I attempted to initialize a console so I could enter ubuntu-bug update-manager /var/log/dist-upgrade, per the instructions I received when I received the error message, but the console failed during initialization. I restarted the machine, and the screen has stopped with the following contents: * Starting bluetooth * Stopping save kernel messages * Starting CUPS printing spooler/server * PulseAudio configured per-user sessions saned disabled: edit /etc/default/saned $starting up Cisco VPN daemon *Starting anac(h)ronistic cron *Stopping anac(h)ronistic cron Each of these steps followed by [ OK ] What are my options? Any help appreciated!

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• How do I capture and playback http web requests against multiple web servers?

  - by KevM

  My overall goal is to not interrupt a production system while capturing HTTP Posts to a web application so that I can reverse engineer the telemetry coming from a closed application. I have control over the transmitter of the HTTP Posts but not the receiving web application. It seems like I need a request "forking" proxy. Sort of a reverse proxy that pushes the request to 2 endpoints, a master and slave, only relaying the response from the master endpoint back to the requester. I am not a server geek so something like this may exist but I don't know the term of art for what I am looking for. Another possibility could be a simple logging proxy. Capture a log of the web requests. Rewrite the log to target my "slave" web application. Playback the log with curl or something. Thank you for your assistance.

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• SQL Server 2012 Installation Hangs

  - by Rivka

  We have a Windows 8 machine that we installed SQL Server 2005 on first. We then uninstalled it and installed SQL Server 2012 - unsuccessfully. The installation wizard hung at the point where it says: SqlEngineDBStartConfigAction_install_configrc_Cpu64 The event log showed the following error: The SQL Server (MSSQLSERVER) service terminated with the following service-specific error: WARNING: You have until SQL Server (MSSQLSERVER) to logoff. If you have not logged off at this time, your session will be disconnected, and any open files or devices you have open may lose data. We got the same error while trying to start the service. We tried uninstalling and re-installing but faced the same issue. Any help would be appreciated.

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• frequent abnormal shutdowns/system crashes

  - by user110353

  It's been almost 5 days since I have installed Ubuntu and almost 6th time that my laptop has been crashed entirely and it shuts down abnormally. Actually, it heats up and I have to wait for 20 odd minutes before I can turn it on again. A message appears that my PC crashed due to overheating which may damage my hard disk. The crashes happened when I tried to open some application that freeze my PC not even giving me enough time to go to system monitor and end process. Sometimes the culprit application which caused crash is Ever-pad, sometime it's team-viewer, sometimes it's some other. This is something very serious. The last crash occurred at 09:14:40. Kindly click here to view system log. I want to stick to Ubuntu and the same laptop as I had serious issues with Windows and I nearly went out to dump my laptop and purchase a more powerful system. Below are my hw/os specs. Kindly advice on how to resolve this issue Ubuntu 12.10 Kernal 3.5.0-18-generic GNOME 3.6.0 Memory 2.0GB Processor: Genuine Intel CPU [email protected] x 2 Available Disk Space: 63.7 GB Thanks in advance

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• getting a weird error whenever I try restarting apache

  - by Binny Zupnick

  I'm trying to install apache, php5, mysql, and phpmyadmin. And I'm following a tutorial but this error keeps happening here's the error: apache2: Syntax error on line 227 of /etc/apache2/apache2.conf: Could not open configuration file /etc/phpmyadmin/apache.conf: No such file or directory Action 'configtest' failed. The Apache error log may have more information. ...fail! I've tried removing all of them and reinstalling but, to no avail. I'm pulling my hair out over this so, thanks in advance! =) edit: during the tutorial I screwed up and deleting something, lol, so I know that's the issue I just don't know what to do about it now

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• How to send a direccion to the void using the Hosts file and without using 127.0.0.1?

  - by magallanes

  I have some name address that i want to send straight to the void using the HOSTS file but i don't want to use the 127.0.0.1. How can i do that?. Why?, I want to speed up some proccess but 127.0.0.1 is serving a webserver, so if i use 127.0.0.1 then this process will call my webserver, consuming resources and may be delaying the process. Right now, i am using 0.0.0.0 instead of 127.0.0.1 but i am not sure if it is correct. 0.0.0.0 crl.microsoft.com

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• Should sanity be a property of a programmer or a program?

  - by toplel32

  I design and implement languages, that can range from object notations to markup languages. In many cases I have considered restrictions in favor of sanity (common knowledge), like in the case of control characters in identifiers. There are two consequences to consider before doing this: It takes extra computation It narrows liberty I'm interested to learn how developers think of decisions like this. As you may know Microsoft C# is very open on the contrary. If you really want to prefix your integer as Long with 'l' instead of 'L' and so risk other developers of confusing '1' and 'l', no problem. If you want to name your variables in non-latin script so they will contrast with C#'s latin keywords, no problem. Or if you want to distribute a string over multiple lines and so break a series of indentation, no problem. It is cheap to ensure consistency with restrictions and this makes it tempting to implement. But in the case of disallowing non-latin characters (concerning the second example), it means a discredit to Unicode, because one would not take full advantage of its capacity.

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• Mac failing (failed?) hard drive - is all hope lost?

  - by Daniel

  It's a 500 GB Seagate laptop hard drive that came with my Macbook Pro. Apple partition format. Already replaced and now have it external, connected via SATA/USB adapter. Trying to get just a few files that I worked on while out of town when it crashed (and thus did not have my time machine backup drive). Drive will not mount, but OS X Disk Utility detects it and can read the capacity, model number, and even the name of the partition, which leads me to believe all hope may not be lost. Failed attempts so far: Disk Utility verify+repair says drive cannot be repaired and that I should back up immediately (lovely) Disk Warrior says it cannot rebuild the directory due to hardware failure Data Rescue quick & deep scans immediately failed PhotoRec says "error reading sector" for every sector (at least for the few minutes I let it run before closing it to explore other options) What else can I try here? Again, I'm just looking for a few, small files (python scripts to be specific) - not a full recovery.

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• Split or individually edit repeating Google Calendar events

  - by Steve Crane

  Our company just moved from Microsoft Exchange with Outlook to Google Mail, Calendar, etc. and I am trying to modify a calendar event where it repeats, but the times across the days are not the same. I created an event from 10h00 to 16h30 and made it repeat for two days. Now the times need to be adjusted independently for the two days. I could just cancel the repeat and book a new appointment for the second day but the event has a confirmed room booking and with rooms at a premium I worry that someone else may grab the room before I can create the new second day event. Outlook had a way to modify repeating events individually but I'm not seeing anything like that in the Google Calendar web client. So my question is whether there is a way to individually edit repeating events, or failing that, to split the repeating event into individual ones?

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• Can I make Puppet's module-to-file mapping to start searching at the top of the modules tree?

  - by John Siracusa

  Consider these two Puppet module files: # File modules/a/manifests/b/c.pp class a::b::c { include b::c } # File modules/b/manifests/c.pp class b::c { notify { "In b::c": } } It seems that when Puppet hits the include b::c directive in class a::b::c, it searches for the corresponding *.pp file by looking backwards from the current class and decides that it find the correct file located at ../../b/c.pp. In other words, it resolves b::c to the same *.pp file that the include b::c statement appears in: modules/a/manifests/b/c.pp I expected it (and would like it) to instead find and load the file modules/b/manifests/c.pp. Is there a way to make Puppet do this? If not, it seems to me that module names may not contain any other module names anywhere within them, which is a pretty surprising restriction.

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• web spidering/crawling, can i do it or just search engines?

  - by bboyreason

  i already had a question answered about web-scraping with wget. but as i read a little more, i realize i may be looking for a web-crawling program. particularly the part about web-crawlers being able to get specific data like links or, in my case, products. all of the products on my site have the following naming convention, website.com/uniqueAlphaNumericID.html as far as i know, no dynamic content generation is being used and only one page per one item in the above format. should i just be thinking about: wget website.com | grep *.html or should i be looking into spiders/crawlers?

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• Google Chrome with strange behavior

  - by user72274

  I'm former Chromium-browser user, but after not upgrading the PPA for 2 months, I switched to Google Chrome browser yesterday. Everything is okay, except some strange behavior on some pages and crashing after loading "chrome://" configuration pages. The best known website with strange behavior is youtube, there is a picture what I see: When I open user menu in top right corner, it crashes that way and even after closing the menu, some parts of menu stay display. You may say it's Youtube problem, no, I have this problem at least on three other websites, here it is on Imgur: The problem isn't for the whole side, sometimes it happens from the middle of the screen. The interesting part is that it happens everytime in the same distance from the right border. When I check the DOM elements with the Developer tool, the overlay which shows element's position is rendered how it should be. What is more, if there is anchor after the crashed area, it works after clicking on it. Selecting text in crashed page is impossible. I hope there is enough information to give me an advice, thanks in advance. :) EDIT: Here is what the browser posted in "chrome://gpu-internals/": Graphics Feature Status Canvas: Software only, hardware acceleration unavailable Compositing: Hardware accelerated 3D CSS: Hardware accelerated CSS Animation: Software animated. WebGL: Hardware accelerated WebGL multisampling: Hardware accelerated Problems Detected Accelerated CSS animation has been disabled at the command line. Accelerated 2d canvas is unstable in Linux at the moment. Ubuntu 12.04 | Gnome-shell 3.4.1 | ATI Radeon 4550 | Screen resolution 1024*768 | Chrome version 20.0.1132.57 (Official Build 145807)

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• Is there a way of disabled byte-range requests in Apache?

  - by Sam Minnée

  I have a web page with a link to a PDF file (target="_blank"). If I click the link, the PDF reader just shows a grey screen within the Firefox browser. If I copy that link and manually open it in a new tab, the PDF will display correctly, and subsequent requests made by clicking the original link now work, suggesting that the problem occurs when loading the file into the cache. It appears as though the Adobe PDF reader plugin is making byte-range requests (I see lots of 206 responses) and I suspect that this may be the cause of the issue. I am running an Apache webserver. Has anyone had problems with Apache and Adobe's byte-range requests? Are there any workarounds? Perhaps a way of configuring Apache to ignore byte-range requests on PDFs?

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

  - by Lokitez

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

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• One site being on a subdirectory of another. Does google count this againt you?

  - by Mick

  I have created two similar websites (relating to monetary systems). So far, one appears to be loved by Google and the other hated. I'm struggling to work out why. This is a mystery to me because both sites were created by me with the same design philosophy, both in pure html. Both are packed to the rafters with references to, and information about, their respective subjects. One issue I'm worried may be the cause is to do with the location of the sites. I got a web hosting package from hostmonster.com for the successful one, but less liked one is just an "add-on" which sits on a subdirectory of the successful one. I wonder if Google somehow detects this and treats it as a less significant website? EDIT: Just to clarify, even though one site is an add-on that sits on a subdirectory of the other, the URL is arranged to look like it is a root. I.e. the unpopular site can be accessed directly with a simple www.myunpopularsite.com name, without specifying any subdirectory.

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• nginx + reverse proxy question

  - by Joe Pilon

  Hello, I am using nginx right now for our production sites with the reverse proxy to apache that's on the same server and it works fantastic. I'm wondering if I can do this: Install nginx on box #1 in say Canada and have it reverse proxy http requests to box #2 in a datacenter in the USA. I know there may be some latency or delays in loading the page etc but that would probably be not noticable to the end user especially if both servers have 100mb ports. Box #2 only does the apache requests, all images are served from box #1 via nginx. Now, would the end visitor be able to tell in any which way that there are 2 boxes being used? Box #2 has sensitive data which we can't have stolen in the event of hacking etc, so this method helps keep things a bit more secure. Anyone know if this is possible or have done something similar?

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• Tool to know what is making the desktop load longer than usual

  - by Marky

  Is there such a tool? My desktop as of late is taking longer to load than usual. I'd say it takes more than 20 seconds from GDM login until I see the desktop. Aside from disabling all app-indicators and testing it manually one by one, what else should be done? The only indicator I remember activating lately was bluetooth and I have already disabled it from Startup Applications. No improvement. I know of bootchart, but I don't really have a problem with boot. It is only after I login that the issue occurs. I'm on Natty Narwhal. *Updating this thread.... The issue seems to have fixed itself and I did not even do anything. It is really weird. I guess this is how Gnome works (and talk about not recognizing your theme and reverting to Windows 95-like look. How about that?). I have been a long time KDE user and I never encountered issues like this one. The KDE then may have booted into the desktop longer (from KDM) but at least I know it was consistent.

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• How can HAProxy improve availibility, or "how can I prevent my site from going down"? [closed]

  - by Joe Hopfgartner

  I am aware of what HAProxy does, but what if my HAproxy goes down? Or what if my DNS servers go down? Yes, dns is less the problem. However dns only solves to an IP and an IP is announced via BGP to be routed over some router. What if that router goes down? Of course if I have complicated application servers that are likely to fail HAProxy can significantly improve uptime. But my application isnt. In fact my application may very well just be delivering a small static html file via HTTP. Basically if any user anywhere types in MYDOMAIN.COM, I want the user to get SOMETHING on the screen other than a timeout or DNS resolution error. How can I do that? The point of entry is difficult. The so called "initial closure mechanism".

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• 2 folders in Sys/Class/Backlight?

  - by zebrapie

  ISSUE: Backlight brightness does not change. More Detail: Brightness will not change, using both 'System Settings-Screen', or FN keys (Brightness bar shows and moves, but screen brightness does not change). Notcied a post in this thread (http://ubuntuforums.org/showthread.php?t=1866283) about having multiple folders in Sys-Class-Backlight... I HAVE TWO FOLDERS TOO! 'intel_backlight' and 'acpi_video0' Using the function keys, alters the value in the acpi_video0's 'Brightness' file - But doesn't actually alter the brightness of the screen. If I add 'backlight=vendor' in Grub, my function keys then edit the value in the 'Intel_Backlight brightness file. - But again doesnt actually change the brightness of the screen. Computer: Fujitsu Siemans Pi2515, Intel Integrated Graphics, No hdd partition. Already Tried: -Editing grub to contain: acpi_osi=Linux acpi_backlight=vendor -http://ubuntuguide.net/change-screen-brightness-with-fn-key-in-ubuntu-11-0410-10 -sudo apt-get install acpi -$ sudo setpci -s 00:02.0 F4.B=20 -Brightness does not adjust in fallback mode either. -Reinstalling OS, Using Linux Mint (Same problem). -Upgrading and downgrading BIOS. Many thanks for reading, I understand this problem may need a bit of a Linux pro to sort. If anyones up for the challenge i'll spend any amount of time being walked through this, posting results. Don't want to give up here!

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• Late Model 2011 Macbook Pro with SSD appears to be off somehow

  - by chris

  Ok, I just got a SSD for my Macbook Pro Late-2011. The specs from what I read are that the laptop is capable of 6gbps, so I got myself a OZC Agility 240gb 6gbps SSD. Decided to join the club and speed test it with Blackmagic Disk Speed Test.. and the results are equivilent to that of a 3gbps setup. So.. I am wondering overall is there a configuration setting somewhere I can tweak? The original HD was a 500gb HDD the spinning kind. So I'm figuring maybe thats why there may be a setting somewhere hidden I dunno about that I can tweak, just wanna see if anyone else knows if this is the case. edit should also mention did a fresh factory install, nothing carried over from original hd

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• 11/28 Thought Leaders Webinar: Marketing Strategies for Great Customer Experiences

  - by Charles Knapp

  With the growing use of mobile and social, it's tempting to bolt on these new channels to existing processes. However, that piecemeal approach may not lead to satisfying customer experiences or solid returns on investments. Furthermore, the volume of information businesses have access to is growing exponentially. Is this leading to better business insight and customer experiences? Join the Internet Marketing Association, The University of California at Irvine, and Oracle as we discuss marketing strategies that will help your customers have better experiences with your brand. You'll learn effective strategies for harnessing the power of "big data" to know more and understand your customers better, empowering customers and employees to make every interaction easy and rewarding, and adapting the customer experience to connect and engage effectively with each customer. Our speakers are Melissa Boxer, Vice President of Product Strategy, Oracle Cloud and CX Applications, who is a conference keynote speaker on integrated social marketing and loyalty analytics, and Dean Abbott, CEO of Abbott Analytics, who is a thought leader in commercial predictive analytics. This learning opportunity takes place on Wednesday, November 28, 11 am to 12 pm Pacific. Register today to learn from these thought leaders.

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• Announcing Hackathon for Social Developers

  - by Mike Stiles

  Continuing our Social Developer theme, we're excited to announce a week long hackathon put on by the Oracle Social Developer Lab (OSDL). The event starts at JavaOne Oct 2nd and runs through Oct 9th. A winner will be announced and profiled in the following issue of Java Magazine. What's it about?The OSDL is on a mission to make social development easier for the Java community. You may have noticed the biggest social networks have created tools for Ruby, PHP, and other languages, but not as much for Java. We've decided to help fill the gap with a SocialLink social publishing library. You can learn more about it on Java.net. We're also interested in promoting other tools that facilitate social development such as DaliCore Framework.  For our hack, you've got one week to leverage our library and/or DailCore to create a social app. The only rules are it must be a new application, and it must leverage one or both of these tools.  How to submit Create a project that uses either the SocialLink library or the DaliCore Framework to read or publish social data. 1. Upload your hack to a new project on java.net 2. Submit the URL to your java.net project through the project submission form on the Oracle Social Developer Community Facebook page. Only projects that have been submitted to the Oracle Social Developer Community will be reviewed.  In addition to the review process, we'll be adding some projects to the SocialLink project as a "sibling" project. Should you participate?If you're a developer who aspires to integrate some social functionality into your Java application, then yes!  How else can I participate with OSDL?If you're not ready to participate in the hackathon but have ideas for how we can make social development easier for the Java community, come join our social developer community on Facebook. 

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• SSH and Latent Connections (e.g., satellite connections)

  - by user71494

  Most of the week I live in the city where I have a typical broadband connection, but most weekends I'm out of town and only have access to a satellite connection. Trying to work over SSH on a satellite connection, while possible, is hardly desirable due to the high latency ( 1 second). My question is this: Is there any software that will do something like buffering keystrokes on my local machine before they're sent over SSH to help make the lag on individual keystrokes a little bit more transparent? Essentially I'm looking for something that would reduce the effects of the high latency for everything except for commands (e.g., opening files, changing to a new directory, etc.). I've already discovered that vim can open remote files locally and rewrite them remotely, but, while this is a huge help, it is not quite what I'm looking for since it only works when editing files, and requires opening a connection every time a read/write occurs. (For anyone who may not know how to do this and is curious, just use this command: 'vim scp://host/file/path/here)

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• Are Rackspace's Cloud Servers really cloud hosting?

  - by sopppas

  I may be confused about what cloud hosting really is... I asked Rackspace how its Cloud Server (CS) 256MB/10GB compares to Slicehost's 256slice VPS, and they said it's exactly the same (only different billing and BW). I know they are the same company. So, why do they call it Cloud Server? Isn't it just a collection of VPS (virtual private servers)? For me, cloud hosting would be: if I need any additional horsepower at any given time, the cloud would automatically stack more VPS and then charge me at the end of the month for the surplus of resources. Reading Rackspace's info, it looks like it's for me to decide when to stack more CS and that its Cloud Servers don't AUTOMATICLY scale up. Am I confusing things?

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