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• SPF record doesn't work (not sure which DNS server to tweak)

  - by Ion

  Problem: Google (and perhaps others) marks our emails as SPF neutral. Let me give you some background about the setup: initially got a dedicated server (Hetzner) with Plesk installed to host a domain/web application, let's say: bigjaws.com. Plesk automatically creates a DNS zone for it with some records for the various services it provides out of the box, e.g. webmail.bigjaws.com as a CNAME to bigjaws.com to provide Horde/whatever, etc. Let me point out four relevant of these records (where XXX.XXX.XXX.158 is our dedicated IP): bigjaws.com. A XXX.XXX.XXX.158 mail.bigjaws.com. A XXX.XXX.XXX.158 bigjaws.com MX (10) mail.bigjaws.com. bigjaws.com. TXT v=spf1 +a +mx -all The above records are not(?) valid anymore though, because after using this dedicated server for a while, our site got bigger and bigger so we decided to move our operations over to AWS (EC2, RDS, ELB, etc), but we retained the mail functionality as is, i.e. emails from [email protected] are sent by connecting to our dedicated server where Plesk takes care of things. This was decided in order not to setup anything from scratch. Of course for all DNS-related things we now use Route53. In Route53 I have the following records: mail.schoox.com. A XXX.XXX.XXX.158 bigjaws.com. MX (10) mail.bigjaws.com bigjaws.com. SPF "v=spf1 +ip4:XXX.XXX.XXX.158 +mx ~all" From my understanding of SPF, the SPF status should have been passed: I designate that all email being sent by bigjaws.com from XXX.XXX.XXX.158 are valid/not spam (I added +mx there but I'm not sure if needed). When a mail server receives an email, doesn't it lookup the SPF record of the domain and checks against the IP it got the email from? Checking with spfquery: root@box:~# spfquery -ip XXX.XXX.XXX.158 -sender [email protected] -rcpt-to [email protected] StartError Context: Failed to query MAIL-FROM ErrorCode: (2) Could not find a valid SPF record Error: No DNS data for 'bigjaws.com'. EndError noneneutral Please see http://www.openspf.org/Why?id=employee1%40bigjaws.com&ip=XXX.XXX.XXX.158&receiver=spfquery : Reason: default spfquery: XXX.XXX.XXX.158 is neither permitted nor denied by domain of bigjaws.com Received-SPF: neutral (spfquery: XXX.XXX.XXX.158 is neither permitted nor denied by domain of bigjaws.com) client-ip=XXX.XXX.XXX.158; [email protected]; If I go to the address listed above (openspf.org) it tells me that the message should have been accepted(!): spfquery rejected a message that claimed an envelope sender address of [email protected]. spfquery received a message from static.158.XXX.XXX.XXX.clients.your-server.de (XXX.XXX.XXX.158) that claimed an envelope sender address of [email protected]. The domain bigjaws.com has authorized static.158.XXX.XXX.XXX.clients.your-server.de (XXX.XXX.XXX.158) to send mail on its behalf, so the message should have been accepted. It is impossible for us to say why it was rejected. What should I do? If the problem persists, contact the bigjaws.com postmaster. Also, here are some headers from an email sent by one of our [email protected] addresses to a gmail.com address (by the way, bigjaws.de listed in the "Received: from" field was the initial domain hosted on the dedicated server before adding the .com one -- both are still listed as separate subscriptions under Plesk). Delivered-To: [email protected] Received: by 10.14.177.70 with SMTP id c46csp289656eem; Wed, 23 Oct 2013 01:11:00 -0700 (PDT) X-Received: by 10.14.102.66 with SMTP id c42mr306186eeg.47.1382515860386; Wed, 23 Oct 2013 01:11:00 -0700 (PDT) Return-Path: <[email protected]> Received: from bigjaws.de (static.158.XXX.XXX.XXX.clients.your-server.de. [XXX.XXX.XXX.158]) by mx.google.com with ESMTPS id l4si19438578eew.161.2013.10.23.01.10.59 for <[email protected]> (version=TLSv1 cipher=RC4-SHA bits=128/128); Wed, 23 Oct 2013 01:10:59 -0700 (PDT) Received-SPF: neutral (google.com: XXX.XXX.XXX.158 is neither permitted nor denied by best guess record for domain of [email protected]) client-ip=XXX.XXX.XXX.158; Authentication-Results: mx.google.com; spf=neutral (google.com: XXX.XXX.XXX.158 is neither permitted nor denied by best guess record for domain of [email protected]) [email protected] DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=default; d=bigjaws.com; b=WwRAS0WKjp9lO17iMluYPXOHzqRcOueiQT4rPdvy3WFf0QzoXiy6rLfxU/Ra53jL1vlPbwlLNa5gjoJBi7ZwKfUcvs3s02hJI7b3ozl0fEgJtTPKoCfnwl4bLPbtXNFu; h=Received:Received:Message-ID:Date:From:User-Agent:MIME-Version:To:Subject:Content-Type:Content-Transfer-Encoding; Received: (qmail 22722 invoked from network); 23 Oct 2013 10:10:59 +0200 Received: from hostname.static.ISP.com (HELO ?192.168.1.60?) (YYY.YYY.ISP.IP) by static.158.XXX.XXX.XXX.clients.your-server.de. with ESMTPSA (DHE-RSA-AES256-SHA encrypted, authenticated); 23 Oct 2013 10:10:59 +0200 Message-ID: <[email protected]> Date: Wed, 23 Oct 2013 11:11:00 +0300 From: BigJaws Employee <[email protected]> User-Agent: Mozilla/5.0 (Windows NT 6.2; WOW64; rv:24.0) Gecko/20100101 Thunderbird/24.0.1 MIME-Version: 1.0 To: [email protected] Subject: test SPF Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit test SPF Any ideas why SPF is not working correctly? Also, are there any DNS settings that are not needed anymore and create a problem?

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• Ubuntu 12.04 Frequent Kernel Panics

  - by Jordan Johns

  Dealing with what seems to be quantum behavior here. I'm having frequent Kernel panics and the problem is very hard to locate. To cut to the chase of what is going on I am essentially getting this screen: This occurs always after login (login screen is fine, can go into my TTY's and everything). But once I log in I have anywhere from 0 (instant) to 10 seconds before everything grinds to a halt and freezes. The only way I found out that it was a kernel panic was going into a TTY while it happens. At first, I figured something must be wrong with memory. Ran memtest86, full standard test. No errors. OK. CPU problem? Windows works fine, ran prime95 and a bunch of other torture tests for many hours. Drive problem? Nope. fsck reports no problems and the smart status is ok. Overclocking problem? Nope. Windows is working fine, and I also reset the bios to prove the point it was not the cause. At a loss here, even trying to reinstall the thing it gives me the same problem even attempting to install ubuntu (like right after you try to select "install ubuntu" or "try ubuntu first before installing"). Anyone have any thoughts? Its very bizarre, its as if my system hates linux and is trying to tell me not to use it (that would be a terrible reality). Thanks!

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• CentOS Vs Windows Server 2008

  - by Steve

  Hi, Apologies if the question appears ambiguous, I have little experience in this area and was after some informed opinions. I am deploying a test scenario of a server/client network and need to make some choices for Server. The client will be a Windows system as it meets the requirements for the client, the server choice has more room for selection. From my experience with Linux in general and the appealing nature of open source for low cost, security etc and the availability and performance of database and web server programs I have been considering CentOS as a server choice. I have the ability to make most of the choices of what software / server packages I wish to install. This includes Active Directory (something I have no experience with). How well does this operate with Windows clients? Am I being too selective and creating unnecessary complication by setting out not to use a Windows Server OS?

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• Speed up ADF Mobile Deployment to Android with Keystore

  - by Shay Shmeltzer

  As you might have noticed from my latest ADF Mobile entries, I'm doing most of my ADF Mobile development on a windows machine and testing on an Android device. Unfortunately the Android/windows experience is not as fast as the iOS/Mac one. However, there is one thing I learned today that can make this a bit less painful in terms of the speed to deploy and test your application - and this is to use the "Release" mode when deploying your application instead of the "Debug" mode. To do this you'll first need to define a keystore, but as Joe from our Mobile team showed me today, this is quite easy. Here are the steps: Open a command line in your JDK bin directory (I just used the JDK that comes with the JDeveloper install). Issue the following command: keytool –genkey –v –keystore <Keystore Name>.keystore –alias <Alias Name> -keyalg RSA –keysize 2048 –validity 10000 Both keystore name and alias names are strings that you decide on. The keytool utility will then prompt you with various questions that you'll need to answer. Once this is done, the next step is to configure your JDeveloper preferences->ADF Mobile to add this keystore there under the release tab:  Then for your application specific deployment profile - switch the build mode from debug to release. The end result is a much smaller mobile application (for example from 60 to 21mb) and a much faster deployment cycle (for me it is about twice as fast as before).

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• No HTTP Response from Tomcat 7 EC2 instance

  - by David Kaczynski

  I am new to EC2 (and Tomcat, for that matter), and I am trying to deploy a vanilla Tomcat 7 server to an Ubuntu 12.04.1 EC2 instance and access the default test site over HTTP. My EC2 instance is running, and the Security Group includes port 80: My /etc/tomcat7/server.xml config has been edited to listen for HTTP requests on port 80: 0 I have restarted my Tomcat 7 server via sudo service tomcat7 restart. However, according to sudo netstat -lnp, Tomcat is not listed as listening over port 80: I am unable to get any response from going to the ...amazonaws.com public DNS in a web browser. What am I missing?

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• Lexmark E240 printing issues

  - by NoamH

  I have Lexmark E240 laser printer. I have been using it with 12.04 (32bit) for 2 years with no significant issues. Since lexmark does not support this printer on linux, I used alternatives drivers that were suggested by the community, such as HP-lasterjet, E238, generic PS, etc. They all worked fine, more or less. After upgrading to 14.04 (64bit fresh install) I tried to configure the printer as before, but now I have problems. The test page is ok, but when printing, most of the times, the first page in the document will be printed very partially and in 300% zoom. Next page might be ok. If I turn off the printer and back on, the first page might be ok, but in the next print job, it will be broken again. I used all the above printer options. Same results. I did NOT install the lexmark drivers since they are intended for 12.04 and the package manager report that it is in "bad quality" (don't know why). Does anyone has any experience with this printer in 14.04 64bit ?

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• Oracle Flashback Technology - Webcast 9th June 2010

  - by Alex Blyth

  Hi All Here are the details for webcast on Oracle Flashback Technologies on Wednesday (9th June 2010) beginning at 1.30pm (Sydney, Australia Time). The Oracle Database architecture leverages the unique technological advances in the area of database recovery due to human errors. Oracle Flashback Technology provides a set of new features to view and rewind data back and forth in time. The Flashback features offer the capability to query historical data, perform change analysis, and perform self-service repair to recover from logical corruptions while the database is online. With Oracle Flashback Technology, you can indeed undo the past! Oracle9i introduced Flashback Query to provide a simple, powerful and completely non-disruptive mechanism for recovering from human errors. It allows users to view the state of data at a point in time in the past without requiring any structural changes to the database. Oracle Database 10g extended the Flashback Technology to provide fast and easy recovery at the database, table, row, and transaction level. Flashback Technology revolutionizes recovery by operating just on the changed data. The time it takes to recover the error is now equal to the same amount of time it took to make the mistake. Oracle 10g Flashback Technologies includes Flashback Database, Flashback Table, Flashback Drop, Flashback Versions Query, and Flashback Transaction Query. Flashback technology can just as easily be utilized for non-repair purposes, such as historical auditing with Flashback Query and undoing test changes with Flashback Database. Oracle Database 11g introduces an innovative method to manage and query long-term historical data with Flashback Data Archive. This release also provides an easy, one-step transaction backout operation, with the new Flashback Transaction capability. Webcast is at http://strtc.oracle.com (IE6, 7 & 8 supported only)Conference ID for the webcast is 6690835Conference Key: flashbackEnrollment is required. Please click here to enroll.Please use your real name in the name field (just makes it easier for us to help you out if we can't answer your questions on the call) Audio details: NZ Toll Free - 0800 888 157 orAU Toll Free - 1800420354 (or +61 2 8064 0613)Meeting ID: 7914841Meeting Passcode: 09062010 Talk to you all Wednesday 9th June Alex

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• Ubuntu 12.04 Precise on Dell Inspirion Duo

  - by Roman M. Kos

  I installed 12.04 version of Ubuntu on my Dell Inspiron Duo. After installing with help of program like UNetBootIn or smth like that. ( Besides i have no problem with kernel panic on chargin on/off like in 11.10. ) After that i followed with steps from here, in the first post here: http://ubuntuforums.org/showthread.php?t=1658635 There left one big problem with touchscreen: When i whant to drag with touchscreen like i`m doing it with mouse (for ex. selecting multile files with mouse) the selectable rectangular doesnot shows while im dragging, when dragging was finished (i put my finger off) it shows the rectangular and hides it. This thing disables all my tries to drag a window or smth else.... Also some time after using touchscreen such things are disabeling: - Often - click from a mouse (after keyboard using functinality restores) - less often - mouse movement disables (sometimes restores sometimes not) - lesser than other - keyboards works but no sygnals accepting (keyoards has indicator, so thay react, mouse of course not) The test from eTouchU utility passes perfeclty. Any idia for solving this problem? P.S.: Im from Ukraine, so sorry if my possible grammar mistakes. P.P.S.: Besides how to know the physicall position of my tabled mode? For automaticall rotating. Like on each rotation do some script.

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• Is these company terms good for a programmer or should I move?

  - by o_O

  Here are some of the terms and conditions set forward by my employer. Does these make sense for a job like programming? No freelancing in any way even in your free time outside company work hours (may be okay. May be they wanted their employees to be fully concentrating on their full time job. Also they don't want their employees to do similar work for a competing client. Completely rational in that sense). - So sort of agreed. Any thing you develop like ideas, design, code etc while I'm employed there, makes them the owner of that. Seriously? Don't you think that its bad (for me)? If I'm to develop something in my free time (by cutting down sleep and hard working), outside the company time and resource, is that claim rational? I heard that Steve Wozniak had such a contract while he was working at HP. But that sort of hardware design and also those companies pay well, when compared to the peanuts I get. No other kind of works allowed. Means no open source stuffs. Fully dedicated to being a puppet for the employer, though the working environment is sort of okay. According to my assessment this place would score a 10/12 in Joel's test. So are these terms okay especially considering the fact that I'm underpaid with peanuts?

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• PHP on IIS7 not showing pages

  - by Jeff

  I have a PHP website on a Windows 7 machine I'm working with and it cannot be viewed by any browser - IE, Chrome, Firefox. When navigating to the root of the website (default index.php) the browser reports it cannot find the address. Not a 404 error from the webserver, just as if it cannot resolve the name. Other websites in the same default web application that are also PHP work perfectly. I've aligned all folder permissions and everything else but this has got me stumped. I even went as far to create a new folder and throw in a test phpinfo() page and it worked. Copied this website's content to the new folder and it cannot find the index.php page. I checked all setting I know and can't seem to find what I'm missing. Anyone else encounter this issue? Remember the fix for it?

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• Laptop turns off after 20 minutes of use

  - by Christoph

  My laptop a sony vaio VGN-NW11S http://www.trustedreviews.com/Sony-VAIO-VGN-NW11S-S---15-5in-Laptop_Laptop_review. Everytime i turn it on, in safe mode or not, if i try to open an application i.e. run a process such as google chrome or event viewer, defrag, virus scan, it completely turns off without warning, nor giving a trace of events the next time I switch it on. Apart from that, I had worries it might be my battery or power supply but I dont think it is that, I took the laptop apart cleaning fans etc. and have ordered some cpu paste as I checked to see the condition of the processor. I will post to see if re-applying the paste works. One more thing, when the heavy processes kick in, the fan starts to make a lot of noise, maybe trying to cool down the CPU? Any ideas on what else it could be and what I could do to test what is wrong?

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• AI to move custom-shaped spaceships (shape affecting movement behaviour)

  - by kaoD

  I'm designing a networked turn based 3D-6DOF space fleet combat strategy game which relies heavily on ship customization. Let me explain the game a bit, since you need to know a bit about it to set the question. What I aim for is the ability to create your own fleet of ships with custom shapes and attached modules (propellers, tractor beams...) which would give advantages and disadvantages to each ship, so you have lots of different fleet distributions. E.g., long ship with two propellers at the side would let the ship spin around that plane easily, bigger ships would move slowly unless you place lots of propellers at the back (therefore spending more "construction" points and energy when moving, and it will only move fast towards that direction.) I plan to balance all the game around this feature. The game would revolve around two phases: orders and combat phase. During the orders phase, you command the different ships. When all players finish the order phase, the combat phase begins and the ship orders get resolved in real-time for some time, then the action pauses and there's a new orders phase. The problem comes when I think about player input. To move a ship, you need to turn on or off different propellers if you want to steer, travel forward, brake, rotate in place... These propellers don't have to work at their whole power, so you can achieve more movement combinations with less propellers. I think this approach is a bit boring. The player doesn't want to fiddle with motors or anything, you just want to MOVE and KILL. The way I intend the player to give orders to these ships is by a destination and a rotation, and then the AI would calculate the correct propeller power to achive that movement and rotation. Propulsion doesn't have to be the same throught the entire turn calculation (after the orders have been given) so it would be cool if the ships reacted as they move, adjusting the power of the propellers for their needs dynamically, but it may be too hard to implement and it's not really needed for the game to work. In both cases, how would that AI decide which propellers to activate for the best (or at least not worst) trajectory to be achieved? I though about some approaches: Learning AI: The ship types would learn about their movement by trial and error, adjusting their behaviour with more uses, and finally becoming "smart". I don't want to get involved THAT far in AI coding, and I think it can be frustrating for the player (even if you can let it learn without playing.) Pre-calculated timestep movement: Upon ship creation, ALL possible movements are calculated for each propeller configuration and power for a given delta-time. Memory intensive, ugly, bad. Pre-calculated trajectories: The same as above but not for each delta-time but the whole trajectory, which would then be fitted as much as possible. Requires a fixed propeller configuration for the whole combat phase and is still memory intensive, ugly and bad. Continuous brute forcing: The AI continously checks ALL possible propeller configurations throughout the entire combat phase, precalculates a few time steps and decides which is the best one based on that. Con: what's good now might not be that good later, and it's too CPU intensive, ugly, and bad too. Single brute forcing: Same as above, but only brute forcing at the beginning of the simulation, so it needs constant propeller configuration throughout the entire combat phase. Coninuous angle check: This is not a full movement method, but maybe a way to discard "stupid" propeller configurations. Given the current propeller's normal vector and the final one, you can approximate the power needed for the propeller based on the angle. You must do this continuously throughout the whole combat phase. I figured this one out recently so I didn't put in too much thought. A priori, it has the "what's good now might not be that good later" drawback too, and it doesn't care about the other propellers which may act together to make a better propelling configuration. I'm really stuck here. Any ideas?

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• Help me to set samba and apache on my Ubuntu VM from Vista, starting from ping

  - by avastreg

  Ok the title is not so clear after all, so let's start with the problem description posting some points: i'm on Win Vista i have a Virtual Box Ubuntu 9.04 server (Virtual Machine) installed in windows i'm under Active Directory (maybe helps), with network 192.168.2.x After Ubuntu installation (LAMP), i have: Ubuntu Ip set to 10.0.2.15 (dhcp) Vista pings Ubuntu and Ubuntu pings Vista (only IPs, not names) Can't connect to Apache (default install ubuntu server) at the url h**p://10.0.2.15/ On Ubuntu, testing Apache by doing 'wget http://10.0.2.15/' works Tried to setup samba, writing a share def, but nothing, i can't access from Vista to Ubuntu My scope is: Setting up samba to work on files from windows Reaching apache to test web pages Ok i'm not completely noob (but i'm on the noob way anyway) and i've tried many solutions, so please try to help me; let's look together what went wrong :)

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• glusterfs to replicate files to other servers

  - by sbrattla

  I've got multiple servers which all need to have the same content in /home. In other words, if the file /home/user1/test.txt is updated on server A, this needs to be replicated to all other servers in the cluster. Is it possible to use GlusterFS for this purpose? That is, let each server have a full copy of all data locally - which that server will be working on - and solely use GlusterFS to take care of replicating this data to the other servers? I'm not intersted in a combined storage, but rather have all data on all machines only to have GlusterFS to replicate it to the other machines.

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• No free disk space ;[

  - by skomak

  Hi I have weird situation because Linux df command says that there is no free disk space [root@backup cache]# df -h Filesystem Size Used Avail Use% Mounted on /dev/sda3 72G 70G 0 100% / /dev/sda1 190M 11M 170M 7% /boot tmpfs 248M 0 248M 0% /dev/shm but du -sh /* says [root@backup cache]# du -sh /* 4.0K /bacula-restores 7.4M /bin 5.4M /boot 3.6T /data 116K /dev 55M /etc 204K /home 76M /lib 16K /lost+found 12K /media 0 /misc 16K /mnt 8.0K /mount 0 /net 8.0K /opt 0 /proc 2.3G /root 32M /sbin 8.0K /selinux 168K /share 8.0K /srv 0 /sys 361M /test 20K /tmp 3.2G /usr 1.5G /var Could you tell me where is a problem? Where is my space? I can't figure it out :(

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• Cannot boot from a hard drive

  - by Martin Melka

  I have a problem booting from a hdd. I used to have it as my main drive before I bought an SSD, so I had been able to boot from it. But for some reason, now, half a year later, I can't get it to work. I completely erased it, deleting data and partitioning (using EASEUS Partition Master), then I installed Kubuntu (without changing anything in the installer), but it simply won't boot up. It always boots the drive with Windows and when I unplug this drive, it only gives me an error "PXE-E61: Media test failure, check cable", I guess it's trying to boot from LAN. I tried installing the system on a freshly deleted drive, without any other drives plugged in the pc, but the problems persist. This is how the drives look now (first one has Windows 7 installed, the second one Kubuntu): I am lost. I mean, after doing a fresh wipe and a clean install without altering anything, it should work. But it doesn't. What can be wrong here? Thanks

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• Storage product testing

  - by wildchild

  hello, I know this is out of place (being an active member here i am coming for the help from seniors) ,but i need some information regarding storage testing ,testing of Raid arrays, SCSI, SAS ,SATA and also test carried out on fabric manager(Cisco MDS series switches). I am aware that this is an administrative forum and i would really appreciate if you could direct me to the correct forum ar links where i can learn things . @ moderators-Sorry for posting at the wrong place,i would be deleting this as soon as i get the help. Thanks !

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• Apt-Get "sources.list needs at least 1 source-URI" error when building dependecies for Xen

  - by Entity_Razer

  What i'm trying to do is install Xen in a test environment, now I am trying to run the: apt-get build-dep xen-3.3 command, but it keep throwing a error which literally translated from dutch (installed the debian OS in Dutch) say's: E: your sourcelist (/etc/apt/sources.list) has to contain at least 1 source-URI I've googled it but I can't seem to find a definitive solid answer on how to fix this. By default a source-URI (read man page of apt-get) states it needs to be something along the lines of deb ftp://ftp.debian.org/debian stable contrib Now I've got 2 HTTP sources (default Debian ones) up & running so far and they've been working flawlessly for the better part of a few days now. Only now its starting to act up. Anyone able to help me out ? Much obliged !

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• Free Developer Day - Hands-on Oracle 11g Applications Development

  - by [email protected]

  Spend a day with us learning the key tools, frameworks, techniques, and best practices for building database-backed applications. Gain hands-on experience developing database-backed applications with innovative and performance-enhancing methods. Meet, learn from, and network with Oracle database application development experts and your peers. Get a chance to win a Flip video camera and Oracle prizes, and enjoy post-event benefits such as advanced lab content downloads.Bring your own laptop (Windows, Linux, or Mac with minimum 2Gb RAM) and take away scripts, labs, and applications*.Space is limited. "Register Now"  for this FREE event. Don't miss your exclusive opportunity to meet with Oracle application development & database experts, win Oracle Trainings, and discuss today's most vital application development topics.          Win two Oracle Trainings valued in $2500 each. Offered by SDT Learning Corp·         Oracle Application Express: Developing Web Applications (duración de 4 días)·         Oracle Fusion Middleware 11g: Java Programming Ed 1.1 (duración de 5 días)You can also be registered Calling to Jamielle Gandía at 787-999-3187Requirements by TrackFor .Net Track1) A windows machine with 2 GB memory2) Attendees must in advance of the show, download and install VMWare player:       http://www.vmware.com/products/player/3) Attendees should test their machine to make sure they can run an executable on an external USB hard drive (some corporate machines are locked down so they cannot do this)For Java TrackYou will save time if you install these applications in advance:1) A windows machine with 2 GB memory2) VirtualBox must be installed in each laptopWhat is virtual box? Where can I download it?For APEX Track1) A windows machine with 2 GB memoryOracle Corporate agenda @  HereNote:  (Limited to 50 people per Track)

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• Squid - Selective reverse proxy and forward proxy

  - by Dean Smith

  I'd like to setup a squid instance to do selective reverse proxy for a configured list of URLs whilst acting as a normal forward proxy for everything else. We are building new infrastructure, parallel live as it where, and I want to have a proxy that people can use that will force selective traffic into the new platform whilst just acting as a forward proxy for anything else. This makes it very easy for people/systems to test the portions of the new platform we want without having to change too much, just use a proxy address. Is such a setup possible ?

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• Does SQLIO lie when run from a Hyper-V guest on a VHD?

  - by ScottStonehouse

  SQLIO seems like a useful tool. I thought it would be interesting to try to measure the speed difference between a physical disk and a VHD. So I ran SQLIO on the Hyper-V host on the physical drive. Results seemed reasonable. Then I ran it from the guest to test the vhd (on the same physical disk). I expected it to be a bit slower. But instead it was way faster - like 0ms average latency. So I'm trying to learn something here. It seems like hyper-v is fooling SQLIO somehow but I don't understand it well enough to figure it out. It's a dynamic vhd, no snapshots or anything, and the vhd is the only file on the disk. The physical disk is actually a two SAS drive RAID 1.

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• Detecting walls or floors in pygame

  - by Serial

  I am trying to make bullets bounce of walls, but I can't figure out how to correctly do the collision detection. What I am currently doing is iterating through all the solid blocks and if the bullet hits the bottom, top or sides, its vector is adjusted accordingly. However, sometimes when I shoot, the bullet doesn't bounce, I think it's when I shoot at a border between two blocks. Here is the update method for my Bullet class: def update(self, dt): if self.can_bounce: #if the bullet hasnt bounced find its vector using the mousclick pos and player pos speed = -10. range = 200 distance = [self.mouse_x - self.player[0], self.mouse_y - self.player[1]] norm = math.sqrt(distance[0] ** 2 + distance[1] ** 2) direction = [distance[0] / norm, distance[1 ] / norm] bullet_vector = [direction[0] * speed, direction[1] * speed] self.dx = bullet_vector[0] self.dy = bullet_vector[1] #check each block for collision for block in self.game.solid_blocks: last = self.rect.copy() if self.rect.colliderect(block): topcheck = self.rect.top < block.rect.bottom and self.rect.top > block.rect.top bottomcheck = self.rect.bottom > block.rect.top and self.rect.bottom < block.rect.bottom rightcheck = self.rect.right > block.rect.left and self.rect.right < block.rect.right leftcheck = self.rect.left < block.rect.right and self.rect.left > block.rect.left each test tests if it hit the top bottom left or right side of the block its colliding with if self.can_bounce: if topcheck: self.rect = last self.dy *= -1 self.can_bounce = False print "top" if bottomcheck: self.rect = last self.dy *= -1 #Bottom check self.can_bounce = False print "bottom" if rightcheck: self.rect = last self.dx *= -1 #right check self.can_bounce = False print "right" if leftcheck: self.rect = last self.dx *= -1 #left check self.can_bounce = False print "left" else: # if it has already bounced and colliding again kill it self.kill() for enemy in self.game.enemies_list: if self.rect.colliderect(enemy): self.kill() #update position self.rect.x -= self.dx self.rect.y -= self.dy This definitely isn't the best way to do it but I can't think of another way. If anyone has done this or can help that would be awesome!

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• Web Farm Framework - Missing IIS features

  - by Buginator

  I'm trying to install a web farm using Microsoft's Web Farm Framework 2.2. The server is Windows 2008 R2 with IIS 7.5. I followed a tutorial. Installed WFF from Web Platform Installer. However, I'm missing some key features in the "Server Farm" panel in IIS. This is how my setup looks like However, just like in the tutorial, I want it like this How can I enable ALL the things, like Load Balancer, Health Test, Server Affinity etc? Thanks. The tutorial I used was this: weblogs.asp.net/scottgu/archive/2010/09/08/introducing-the-microsoft-web-farm-framework.aspx

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• Is there an equivalent of SU for Windows

  - by CodeSlave

  Is there a way (when logged in as an administrator, or as a member of the administrators group) to masquerade as a non-privileged user? Especially in an AD environment. e.g., in the Unix world I could do the following (as root): # whoami root # su johnsmith johnsmith> whoami johnsmith johnsmith> exit # exit I need to test/configure something on a user's account, and I don't want to have to know their password or have to reset it. Edit: runas won't cut it. Ideally, my whole desktop would become the user's, etc. and not just in a cmd window.

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• Custom daemon script: works, but does not run at boot / startup

  - by pearjoint

  this is Ubuntu 10.10 Maverick. I have the following shell script in init.d that I want to run as a "daemon" (background service with start/stop/restart really) at system startup. There is a symlink in rc3.d. I tried 4 and 5 too. (Ideally this would initialize before graphical login happens and before a user logs in.) IMPORTANT: the script works 100% as expected and required when testing this with service MetaLeapDaemon start and service MetaLeapDaemon stop. (This shell script calls a Python program which makes sure the appropriate .pid files are both created at startup and deleted at exit.) So generally it works fine but now my only issue is why it will not be run at any of the run-levels I tried. I know for sure it isn't run because the log file it normally creates does not get created. As you can see (by the lack of any uid:gid args in the start-stop-daemon commands) this would currently run only under root, is this forbidden in a default setup? Here's the script, pretty much your run-off-the-mill daemon script really: #! /bin/sh DAEMON=/opt/metaleap/_core/daemon/MetaLeapDaemon.py NAME=MetaLeapDaemon DESC="MetaLeapDaemon" test -f $DAEMON || exit 0 set -e case "$1" in start) start-stop-daemon --start --pidfile /var/run/$NAME.pid --exec $DAEMON ;; stop) start-stop-daemon --stop --pidfile /var/run/$NAME.pid ;; restart) start-stop-daemon --stop --pidfile /var/run/$NAME.pid sleep 1 start-stop-daemon --start --pidfile /var/run/$NAME.pid --exec $DAEMON ;; *) N=/etc/init.d/$NAME echo "Usage: $N {start|stop|restart}" >&2 exit 1 ;; esac exit 0

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