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  • Trigger IP ban based on request of given file?

    - by Mike Atlas
    I run a website where "x.php" was known to have vulnerabilities. The vulnerability has been fixed and I don't have "x.php" on my site anymore. As such with major public vulnerabilities, it seems script kiddies around are running tools that hitting my site looking for "x.php" in the entire structure of the site - constantly, 24/7. This is wasted bandwidth, traffic and load that I don't really need. Is there a way to trigger a time-based (or permanent) ban to an IP address that tries to access "x.php" anywhere on my site? Perhaps I need a custom 404 PHP page that captures the fact that the request was for "x.php" and then that triggers the ban? How can I do that? Thanks! EDIT: I should add that part of hardening my site, I've started using ZBBlock: This php security script is designed to detect certain behaviors detrimental to websites, or known bad addresses attempting to access your site. It then will send the bad robot (usually) or hacker an authentic 403 FORBIDDEN page with a description of what the problem was. If the attacker persists, then they will be served up a permanently reccurring 503 OVERLOAD message with a 24 hour timeout. But ZBBlock doesn't do quite exactly what I want to do, it does help with other spam/script/hack blocking.

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  • How to configure Postfix client relay to Exchange 2010 server

    - by helcim
    I'm getting (delivery temporarily suspended: SASL authentication failed; server myserver.com[xxx.xxx.xxx.x] said: 535 5.7.3 Authentication unsuccessful) when I try to relay mail from Postfix 2.5.5-1.1 on Debian Lenny box to Exchange 2010. I think I tried all possible combinations but I'm definitely missing something. Here is relevant part of main.cf: broken_sasl_auth_clients = yes smtp_sasl_auth_enable = yes smtp_sasl_security_options = noanonymous smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd smtp_pix_workarounds = smtp_sasl_type = cyrus smtp_always_send_ehlo = yes relayhost = myserver.com And I got libsasl2-modules installed. Anybody managed to successfully relay mail between Postfix and Exchange? Oh, and I already double-checked if password is right.

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  • Copying dovecot maildir to another server with courier maildir

    - by NovumCoder
    Hi all, i just moved all my mailboxes first from one server to the new one by using rsync. After that i created the folders using Thunderbird to have same folder structure like on old server. Then i copied all mail files into the folders. Now when i subscribe and click on the folder in Thunderbird it starts downloading the headers of all mails, but after finishing download nothing appears in the mail list. Its like my folder is empty and everytime i click again on the folder thunderbird starts again downloading headers. What is wrong here? I found a solution using a tool called imapsync, but its not for free, so i started doing it by copy&paste. I thought Thunderbird will be able to fix the indexes. :-( Or is there a better solution to migrate from dovecot maildir to courier maildir?

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  • Showing content from pages at different URL's (masking), possibly with .htaccess

    - by zigojacko
    If I have URL's like:- domain.com/category/widgets/filter/blue domain.com/category/widgets/filter/red And it is pretty difficult to reconstruct them to something like:- domain.com/category/blue-widgets domain.com/category/red-widgets Is there any way at all that I can use URL rewrites or anything else with .htaccess or on the server to display the URL's as the domain.com/category/blue-widgets on the domain.com/category/widgets/filter/blue page? I've looked into masking URL's but got nowhere and this has been something bugging me for almost 6 months now. Is there any way to achieve what I want to do? FYI: This is a Magento website and the above process, I am wanting to implement for potentially hundreds of URL's. Edit To respond to @kkugelmann's answer:- I couldn't get your proposed RewriteRule to make a difference at all in the .htaccess file so I started testing a few things in this .htaccess tester:- The proposed RewriteRule didn't work in this tester:- However, the following did:- But adding any of these RewriteRule's into the website's .htaccess file did not rewrite the URL at all... Edit2 By the way, if I add [R=301,L] to the end of the URL rewrite rule, it does actually then rewrite the rule, but of course 301 redirects it as well which is unwanted behaviour. Edit3 I found another question with the same issue... And an accepted answer that solved the problem which seemed to be something to do with using mod_proxy and the [P] tag on the rule (if I try this, the page 404's).

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  • Looking for suggestions: becoming a hireable, young programmer [closed]

    - by Dan
    I am a 17 year old Java programmer that has filled the last year with learning all of the ins and outs of Java - Using Eclipse, and the help of a friend of the family (a Java programming architect for some company), I have learned everything from serializing objects, basic networking, generics, reflection, multi-threading, code optimization and efficiency & some concurrency safety - built my own proxy class, and nowadays, I answer questions on Project Euler. I am seeking some suggestions though on where I go next, or where I go from here to get a job in programming. I dedicate at least an hour every day to coding, sometimes literally, the entire day, and I really have come to love the process. I just started reading Effective Java (v2), and learning Scala (as I see often, possibly the Java replacement) I will be going to college for Computer Science next year - and taking AP computer science this year (however, I took a practice exam and got an 87, only need a 60to70 to pass, so no need to study for it too much) -- I was wondering if getting the SE 7 OCA and OCP would help me in trying to get a programming job. I looked around and most people have said online that an OCA/OCP are practically useless, but, at my age do they make me any more credible? More or less, what would you recommend to get a job in programming these days - or distinguish yourself from the crowd? I have enough time and dedication to learn another language, or anything really. Thank you very much.

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  • Working with fubar/refuctored code

    - by Keyo
    I'm working with some code which was written by a contractor who left a year ago leaving a number of projects with buggy, disgustingly bad code. This is what I call cowboy PHP, say no more. Ideally I'd like to leave the project as is and never touch it again. Things break, requirements change and it needs to be maintained. Part A needs to be changed. There is a bug I cannot reproduce. Part A is connect to parts B D and E. This kind of work gives me a headache and makes me die a little inside. It kills my motivation and productivity. To be honest I'd say it's affecting my mental health. Perhaps being at the start of my career I'm being naive to think production code should be reasonably clean. I would like to hear from anyone else who has been in this situation before. What did you do to get out of it? I'm thinking long term I might have to find another job. Edit I've moved on from this company now, to a place where idiots are not employed. The code isn't perfect but it's at least manageable and peer reviewed. There are a lot of people in the comments below telling me that software is messy like this. Sure I don't agree with the way some programmers do things but this code was seriously mangled. The guy who wrote it tried to reinvent every wheel he could, and badly. He stopped getting work from us because of his bad code that nobody on the team could stand. If it were easy to refactor I would have. Eventually after many 'just do this small 10minute change' situations had ballooned into hours of lost time (regardless of who on the team was doing the work) my boss finally caved in it was rewritten.

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  • Suspend/resume issue hp envy m6

    - by aikeru
    :) I just installed Ubuntu 13.10 on my HP envy m6. When I press the "power" button and select to suspend, it looks like it goes to sleep (power light flashing, as expected). When I press the power button to wake it (or anything else), it stops flashing and goes solid (as it should) but the screen is black. I tried CTRL+ALT+F1 but nothing seems to happen. Is there something I can do to get Ubuntu to resume from suspend? EDIT: I tried getting any updates for Ubuntu as well as updating my BIOS. Neither seems to have any effect. EDIT: Tried the 2nd script from Ubuntu 12.04 LTS suspend fix and it seemed to have no effect. Tried the 1st script and now I can't seem to suspend at all - Ubuntu seems to try to suspend and then immediately goes to the password prompt. With some combination of things I seem to be able to get a new crash, though, involving wpa_supplicant. I allowed it to submit feedback. My WiFi seems to be working fine (I assume this is what WPA is). EDIT: I know this is 'askubuntu', but I did try latest Linux Mint / Cinnamon. Results were exactly the same (black screen, power light solid after waking up - just as before, I can make it reboot by mashing CTRL+ALT+DEL but CTRL+ALT+F1/etc. doesn't work). Trying Ubuntu 12.04 next. EDIT: Ubuntu 12.04 WORKS! At least it seems to with a quick test. Came right back up after suspend. If I don't have any other problems and no answers are suggested, I'll make my own answer and accept it. Maybe someone can use this information to help troubleshoot the real issue. Would be nice to be on the latest version... but suspend would've been a deal-breaker for me. Hope this info helps someone.

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  • MBP Bluetooth PAN connection with iPhone 4

    - by Chetan Sachdev
    I am trying to share MBP(OSX 10.8.3) internet connection with iPhone 4 (iOS 6) using Bluetooth PAN(Personal Area Network). Problem is Bluetooth PAN is not getting an ip address. I have tried to renew DHCP lease but nothing works. When I give a Manual IP address, the Bluetooth PAN goes green but doesn't shows the connection in iPhone. Is it possible to share the internet connection via Bluetooth. Note: I don't want to create an Ad-hoc connection over wifi.

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  • Fan always on and overheating problems on HP G62

    - by Dave
    I have a HP G62 with i5 processor, 4G Ram and ATI HD 5470. Started using Ubuntu 4 months ago, first was 11.10 and after 12.04. Everything worked perfectly until some weeks ago when my cpu fan became "crazy" and I mean by this always on, noise and overheating problems, for sure if I put a glass with water in some minutes will boil (and I mean it). There can be a bug in the last kernel or any other Ubuntu's official update? And by the way CPU fan is cleaned like a new born baby; Used jupiter and all those stuff (lm-sensor, psensor...) - same problem; Don't ask me to install ATI drivers because will work like sh#t (interface laggy as HD 5470 isn't supported by Ubuntu) and I can't even open ATI Catalyst (error when I try to open it), more than this I always used open source drivers and as I said, worked perfectly (3d, effects). Right now I'm back to Windows and everything is working perfectly but my main problem is that I get used with Ubuntu and kinda weird to use windows again. I want back my nice and almost perfect Ubuntu. Thanks, Dave

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  • Computer won't start unless power is removed for ~5 minutes

    - by Paul Tarjan
    I have a fairly standard 2-year old desktop computer (quad-core intel, single hard drive, decent video card, 300W power supply) which recently started acting up. I'm not sure what the cause is, so hopefully you can help. Sometimes (once a week-ish) I press the power button and nothing happens. No blinking, no sounds, no nothing. If I remove the power cord (or flip the switch on the power supply) I hear a capacitor discharge. If I leave it in the "no power at all" state for about 5 minutes then I can put the plug back in and the computer works perfectly. What is the issue? What do you think I have to replace?

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  • SOA Forcing A Shift In IT Governance

    As more and more companies adopt a service oriented approach to developing and maintaining existing enterprise systems, IT governance also needs to shift its philosophies to fit the emerging development paradigm. When I first started programming companies placed an emphasis on “Code and Go” software development style. They only developed for current problems and did not really take a look at how the company could leverage some of the code we were developing across the entire enterprise system.  The concept of Service Oriented Architecture (SOA) has dramatically shifted how we develop enterprise software with emphasizing software processes as company assets. This has driven some to start developing new components as processes strictly for the possibility of future integration of existing and new systems. I personally like this new paradigm because it truly promotes code reusability. However, most enterprise level IT governance polices were created prior to the introduction of SOA in their respected organization. This can create a sense of the Wild West for developers working on projects related to SOA. This is due to the fact that a lot of the standards and polices implemented by enterprise IT governing boards were initially for developing under the “Code and Go” paradigm and do not take in to account idiosyncrasies found in the SOA/integration based development. As IT governance moves forward its focus should aim more for “Develop to Integrate” versus “Code and Go” philosophies. Examples of “Develop to Integrate” Philosophy: Defining preferred data transfer methodologies (XML vs. JSON), and when to use them Updating security best practices for exposing public services based on existing standard security policies Define when to use create new SOA project vs. implementing localized components that could be reused elsewhere in the enterprise.

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  • @CodeStock 2012 Review: Leon Gersing ( @Rubybuddha ) - "You"

    "YOU"Speaker: Leon GersingTwitter: @Rubybuddha Site: http://about.me/leongersing I honestly had no idea what I was getting in to when I sat down in to this session. I basically saw the picture of the speaker and knew that it would be a good session. I was completely wrong; it was the BEST SESSION of CodeStock 2012.  In fact it was so good, I texted another coworker attending the conference to get over and listen to Leon. Leon took on the concept of growth in the software development community. He specifically referred David Hansson in his ability to stick to his beliefs when the development community thought that he was crazy for creating Ruby on Rails. If you do not know this story Ruby on Rails is one of the fastest growing web languages today. In addition, he also touched on the flip side of this argument in that we must be open to others ideas and not discard them so quickly because we all come from differing perspectives and can add value to a project/team/community. This session left me with two very profound concepts/quotes: “In order to learn you must do it badly in front of a crowed and fail.” - @Rubybuddha I can look back on my career so far and say that he is correct; I think I have learned the most after failing, especially when I achieved this failure in front of other. “Experts must be able to fail.” - @Rubybuddha I think we can all learn from our own mistakes but we can also learn from others. When respected experts fail it is a great learning opportunity for the entire team as well as the person who failed. When expert admit mistakes and how they worked through them can be great learning tools for other developers so that they know how to avoid specific scenarios and if they do become stuck in the same issue they will know how to properly work their way out of them.

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  • Yoga Pro 2 Wi-Fi not working

    - by user293004
    I installed Ubuntu 14.04 on my new Yoga Pro 2 and the wireless is not working. It started with Windows 8 on it. The Network Manager says Wi-Fi is disabled by hardware switch. I tried putting a blacklist file in ect/modprobe.d as has been suggested in many places. I called the file "blacklist-ideapad_laptop.conf" and wrote in the file blacklist ideapad_laptop I checked to make sure that the wireless is enabled in the BIOS. It is. I ran rfkill list all and it displayed: 0: hci0: Bluetooth Soft blocked: no Hard blocked: no 2: phy0: Wireless LAN Soft blocked: no Hard blocked: yes I ran iwlist wlan0 scan and it displayed: wlan0 Failed to read scan data : Network is down I ran sudo rmmod ideapad_laptop and it displayed: rmmod: ERROR: Module ideapad_laptop is not currently loaded. I ran ifconfig wlp1s0 up and it displayed: wlp1s0: ERROR while getting interface flags: No such device. I ran "lspci" and it displayed: 01:00.0 Network controller: Intel Corporation Wireless 7260 (rev 6b) I ran sudo lshw -c network and it displayed: *-network DISABLED description: Wireless interface product: Wireless 7260 vendor: Intel Corporation physical id: 0<br> bus info: pci@0000:01:00:0.0 logical name: wlan0 version: 6b serial: 7c:7a:91:5f:9b:fa width: 64 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless configuration: broadcast=yes driver=iwlwifi driverversion=3.13.0-24-generic firmware=22.24.8.0 latency=0 link=no multicast=yes wireless=IEEE 802.11bgn resources: irq:61 memory:b0400000-b0401fff This No wireless with Intel Centrino Advanced-N 7260 seems to be dealing with a similar issue. It suggests that I need to update my firmware. So I downloaded iwlwifi-7260-ucode-23.214.9.0 from Intel's website. I put the file "iwlwifi-7260-9.ucode" in /lib/firmware and ran "sudo lshw -c network" again. It displayed exactly as before. Is there something else I need to do install the new firmware?

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  • ArchBeat Link-o-Rama for November 27, 2012

    - by Bob Rhubart
    Eventing Hello World | Ronald van Luttikhuizen Oracle ACE Director Ronald van Luttikhuizen shares the slides, source code, and other information from his recent presentation at the DOAG conference in Nürnberg. How to Create Virtual Directory in Weblogic Server | Zeeshan Baig Oracle ACE Zeeshan Baig shows you how in six easy steps. ADF Mobile - Secured Web Service Access | Andrejus Baranovskis "There are good tutorials how to consume open Web Service in ADF Mobile," says Oracle ACE Director Andrejus Baranovskis, "but in practice almost every Web Service exposed for the mobile must be secured - who wants to expose open Web Service on the public internet?" His blog post will set you on the right course. How-to: Starting with Oracle Service Bus | Dr. Frank Munz Dr. Frank Munz shares advice and resources for those interested in getting started with Oracle Service Bus. One-Stop Shop for Oracle Webcasts Webcasts can be a great way to get information about Oracle products without having to go cross-eyed reading yet another document off your computer screen. Oracle's new Webcast Center offers selectable filtering to make it easy to get to the information you want. Yes, you have to register to gain access, but that process is quick, and with over 200 webcasts to choose from you know you'll find useful content. Thought for the Day "There is only one thing more painful than learning from experience and that is not learning from experience." — Archibald MacLeish (May 7, 1892 – April 20, 1982) Source: SoftwareQuotes.com

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  • How to build a "traffic AI"?

    - by Lunikon
    A project I am working on right now features a lot of "traffic" in the sense of cars moving along roads, aircraft moving aroun an apron etc. As of now the available paths are precalculated, so nodes are generated automatically for crossings which themselves are interconnected by edges. When a character/agent spawns into the world it starts at some node and finds a path to a target node by means of a simply A* algorithm. The agent follows the path and ultimately reaches its destination. No problem so far. Now I need to enable the agents to avoid collisions and to handle complex traffic situations. Since I'm new to the field of AI I looked up several papers/articles on steering behavior but found them to be too low-level. My problem consists less of the actual collision avoidance (which is rather simple in this case because the agents follow strictly defined paths) but of situations like one agent leaving a dead-end while another one wants to enter exactly the same one. Or two agents meeting at a bottleneck which only allows one agent to pass at a time but both need to pass it (according to the optimal route found before) and they need to find a way to let the other one pass first. So basically the main aspect of the problem would be predicting traffic movement to avoid dead-locks. Difficult to describe, but I guess you get what I mean. Do you have any recommendations for me on where to start looking? Any papers, sample projects or similar things that could get me started? I appreciate your help!

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  • KeepLevelReg settings to eliminate sync prompts - errors occurred while Windows was synchronizing your data

    - by Detritus Maximus
    We have 2 XP pro VMs (Citrix) that both have problems with logout prompts appearing during logout. Users are closing the rdc before these appear: The Microsoft solution involves the creation of the KeepProgressLevel registry entry along with a value of 1 for "pause on errors." I have implemented this across the domain for this problem, yet these 2 VM's continue to have the prompts. Today, I experimented by changing the KeepProgressLevel option to 0. This is not one of the options given by MS, yet I stopped getting the prompts. Can anyone tell me what I've done by setting the value to 0? Have I basically turned off the feature as if the KeepProgressLevel entry is gone? If so, why no more prompts? I did notice during logoff that there is a red x and error message, yet no prompt.

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  • Best Timing for Windows AD Domain Name Change

    - by Cliff Racer
    A while back when I first started with my company, the domain had already been set up using a "xxx.net" DNS name for the internal AD namespace. The shortname is just fine and I feel no need to change it but I have always hated how we used an internet DNS name for our internal AD. We are planning an AD upgrade from 2003 to 2008R2 and I would like to work this DNS name change if possible. I know there are procedures for doing a full domain name change but my question is: Is a FULL domain name change neccessary if all I want to change is the internal DNS name of the domain? Would it be better to do this change after the 2008R2 domain upgrade?

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  • Logrotate, is this a proper config for what I want to do?

    - by Felthragar
    I started using logrotate a few days ago on a new server setup (actually three of them). My config is as follows. /var/www/mywebsite.com/logs/*.log { rotate 14 daily dateext compress delaycompress sharedscripts postrotate /usr/sbin/apache2ctl graceful > /dev/null endscript } Problem is that this is putting several days of logs into the same file. For example, I've currently got a file called access.log-20121005 which has logs for Oct 3rd, Oct 4th and Oct 5th in it. Is that proper behaviour? What I want for it to do is to create one logfile for each day and keep 14 days of logs. Any help appreciated, thanks.

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  • Infrastructure to effectively set up experiements and learn from them

    - by David
    Open-org.com is in the early stages of creating our first product, a place on the web, where one can ask lawyers questions at a fraction of their normal costs. An early stage front page can be found here. I got inspired by this video, which is recommended by Jeff Atwood, which talks about getting feedback faster, which is the reason for this question. The problem Needless to say, we want our conversion rates to be as high as possible. Therefore, we want to be able to rapidly set up a new experiment where we change something on the site (like moving an image slightly, rewriting a sentence etc.). We then want to present the modified page to a random subset of the users. After that we will compare the conversion rates of the experiment with another version. I could very well imagine that we want to run 10-100 experiments simultaneously and it would be nice to have features, where experiments that obviously have worse results will be ended before schedule. My question Does infrastructure to support the whole process exist? A short description of our infrastructure... We use EC2 and PHP and have a script to automatically start up new instances with all needed software. Still, starting up a new server for every experiment, seems like a bit of overkill, so I am wondering what other options exist. Btw. If you feel like working for Open-org.com, you can pick a task, and start working, or suggest a new task. All profits are given out to the contributors.

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  • Using PreApplicationStartMethod for ASP.NET 4.0 Application to Initialize assemblies

    - by ChrisD
    Sometimes your ASP.NET application needs to hook up some code before even the Application is started. Assemblies supports a custom attribute called PreApplicationStartMethod which can be applied to any assembly that should be loaded to your ASP.NET application, and the ASP.NET engine will call the method you specify within it before actually running any of code defined in the application. Lets discuss how to use it using Steps : 1. Add an assembly to an application and add this custom attribute to the AssemblyInfo.cs. Remember, the method you speicify for initialize should be public static void method without any argument. Lets define a method Initialize. You need to write : [assembly:PreApplicationStartMethod(typeof(MyInitializer.InitializeType), "InitializeApp")] 2. After you define this to an assembly you need to add some code inside InitializeType.InitializeApp method within the assembly. public static class InitializeType {     public static void InitializeApp()     {           // Initialize application     } } 3. You must reference this class library so that when the application starts and ASP.NET starts loading the dependent assemblies, it will call the method InitializeApp automatically. Warning Even though you can use this attribute easily, you should be aware that you can define these kind of method in all of your assemblies that you reference, but there is no guarantee in what order each of the method to be called. Hence it is recommended to define this method to be isolated and without side effect of other dependent assemblies. The method InitializeApp will be called way before the Application_start event or even before the App_code is compiled. This attribute is mainly used to write code for registering assemblies or build providers. Read Documentation I hope this post would come helpful.

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  • Cleaning your BizTalk Build Server

    - by Michael Stephenson
    Just a little note for myself this one.At one of my customers where it is still BizTalk 2006 one of the build servers is intermittently getting issues so I wanted to run a script periodically to clean things up a little.  The below script is an example of how you can stop cruise control and all of the biztalk services, then clean the biztalk databases and reset the backup process and then click everything off again.This should keep the server a little cleaner and reduce the number of builds that occasionally fail for adhoc environmental issues.REM Server Clean ScriptREM =================== REM This script is ran to move the build server back to a clean state echo Stop Cruise Controlnet stop CCService echo Stop IISiisreset /stop echo Stop BizTalk Servicesnet stop BTSSvc$<Name of BizTalk Host><Repeat for other BizTalk services> echo Stop SSOnet stop ENTSSO echo Stop SQL Job Agentnet stop SQLSERVERAGENT echo Clean Message Boxsqlcmd -E -d BizTalkMsgBoxDB -Q "Exec bts_CleanupMsgbox"sqlcmd -E -d BizTalkMsgBoxDB -Q "Exec bts_PurgeSubscriptions"  echo Clean Tracking Databasesqlcmd -E -d BizTalkDTADb -Q "Exec dtasp_CleanHMData" echo Reset TDDS Stream Statussqlcmd -E -d BizTalkDTADb -Q "Update TDDS_StreamStatus Set lastSeqNum = 0" echo Force Full Backupsqlcmd -E -d BizTalkMgmtDB -Q "Exec sp_ForceFullBackup" echo Clean Backup Directorydel E:\BtsBackups\*.* /q  echo Start SSOnet start ENTSSO echo Start SQL Job Agentnet start SQLSERVERAGENT echo Start BizTalk Servicesnet start BTSSvc$<Name of BizTalk Host><Repeat for other BizTalk services> echo Start IISiisreset /start echo Start Cruise Controlnet start CCService

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  • Using Gentoo's `ebegin`, `eend` etc under Ubuntu

    - by Marcus Downing
    We're quite fond of the style of the ebegin, eend, eerror, eindent etc commands used by Portage and other tools on Gentoo. The green-yellow-red bullets and standard layout make for very quick spotting of errors, on what would otherwise be very grey command line output. #!/bin/sh source /etc/init.d/functions.sh ebegin "Copying data" rsync .... eend $? Producing output similar to: * Copying data... [ OK ] As a result we're using these commands in some of our common shell scripts, which is a problem for the people using Ubuntu and other linuxes. (linuces? linuxen? linucae? other distros) On Gentoo these functions are provided by OpenRC, and imported with functions.sh file (whose exact position seems to vary slightly). But is there a simple way of getting these commands on Ubuntu? In theory we could replace them all with dull echos, but we'd rather not?

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  • Can't start webcam for google video services

    - by wisemonkey
    I've got Ubuntu 11.10 64 bit and have installed the google video chat plugin. However webcam doesn't seem to work (black screen -- no video at all). For cheese it works but shows really bad (black and white kinda) image. Following some link I installed guvcview if I start it then image looks neat. Any suggestions on how can it be fixed? If it helps I've tried the solution: $ sudo mv /opt/google/talkplugin/GoogleTalkPlugin /opt/google/talkplugin/GoogleTalkPlugin.old $ sudo gedit /opt/google/talkplugin/GoogleTalkPlugin and putting following lines in: #!/bin/sh LD_PRELOAD=/usr/lib32/libv4l/v4l1compat.so /opt/google/talkplugin/GoogleTalkPlugin.old OR #!/bin/sh LD_PRELOAD=/usr/lib/x86_64-linux-gnu/libv4l/v4l1compat.so /opt/google/talkplugin/GoogleTalkPlugin.old Cause I've both files. Finally $sudo chmod +x /opt/google/talkplugin/GoogleTalkPlugin.old I closed and reopened chrome then started gmail tried video call -- black screen :-/ Ok so today finally google+ provided me with trouble shoot link and advised me: The plug-in won't install If you're having trouble installing the plug-in, or are receiving a message asking you to reinstall it, you should check to make sure your configuration is right. To do so simply: Check to make sure the Google Talk Plugin Video Accelerator and Google Talk NPAPI Plugin are enabled. If you're using Chrome you can type about:plugins in your browser to display your plug-ins. Make sure you're not using Internet Explorer 64-bit (this is a browser version that is 64 bit as opposed to 32 bit). Ensure that you don't have any "click to run" extensions enabled. If you're still experiencing this issue after checking your configuration you can follow these steps: Refresh the browser page. Close any running Google Talk plug-in processes. Close all open and running browser processes. Restart your computer. Uninstall and then reinstall the plug-in. Try a different browser such as Google Chrome or Mozilla Firefox. I looked in about:plugins for chrome and firefox: I don't have Google Talk NPAPI Plugin, does that matter? and I thought its installed with google talk plugin or no?

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  • Does immutability entirely eliminate the need for locks in multi-processor programming?

    - by GlenPeterson
    Part 1 Clearly Immutability minimizes the need for locks in multi-processor programming, but does it eliminate that need, or are there instances where immutability alone is not enough? It seems to me that you can only defer processing and encapsulate state so long before most programs have to actually DO something. If a program performs actions on multiple processors, something needs to collect and aggregate the results. All this involves multi-process communication before, after, and possibly during some transformations. The start and end state of the machines are different. Can this always be done with no locks just by throwing out each object and creating a new one instead of changing the original (a crude view of immutability)? What cases still require locking? I'm interested in both the theoretical/academic answer and the practical/real-world answer. I know a lot of functional programmers like to talk about "no side effect" but in the "real world" everything has a side effect. Every processor click takes time and electricity and machine resources away from other processes. So I understand that there may be more than one perspective to answer this question from. If immutability is safe, given certain bounds or assumptions, I want to know what the borders of the "safety zone" are exactly. Some examples of possible boundaries: I/O Exceptions/errors Interfaces with programs written in other languages Interfaces with other machines (physical, virtual, or theoretical) Special thanks to @JimmaHoffa for his comment which started this question! Part 2 Multi-processor programming is often used as an optimization technique - to make some code run faster. When is it faster to use locks vs. immutable objects? Given the limits set out in Amdahl's Law, when can you achieve better over-all performance (with or without the garbage collector taken into account) with immutable objects vs. locking mutable ones? Summary I'm combining these two questions into one to try to get at where the bounding box is for Immutability as a solution to threading problems.

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  • Got that Friday feeling?

    - by Rebecca Amos
    Saturday is just around the corner, and we’re all starting to wrap up for the weekend. If you’re the DBA that ‘Friday feeling’ might be as much about checking and preparing your SQL Servers for the next two days, as about looking forward to spending time with friends and family. Whether you’re double-checking your disaster recovery strategy, or know that it’s your turn to be on-call this weekend, it’s likely you’re preparing for the worst, just in case. The fact that you’re making these checks, and caring about both your servers and your users, means that you might be an exceptional DBA. You’re already putting in that extra effort to make other people’s lives easier. So why not take some time for your professional development and enter the Exceptional DBA Awards? If you’re looking for some inspiration for your entry, download our Judges’ Top Tips poster for advice on what the judges are looking for from this year’s entrants. Not only will you be boosting your professional development, but you could win full conference registration for the 2011 PASS Summit in Seattle (where the awards ceremony will take place), four nights' hotel accommodation, and a copy of Red Gate’s SQL DBA Bundle. So take some time out for yourself this weekend and get started on your entry: www.exceptionaldba.com

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