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• Cheap server stress testing

  - by acrosman

  The IT department of the nonprofit organization I work for recently got a new virtual server running CentOS (with Apache and PHP 5), which is supposed to host our website. During the process of setting up the server I discovered that the slightest use of the new machine caused major performance problems (I couldn't extract tarballs without bringing it to a halt). After several weeks of casting about in the dark by tech support, it now appears to be working fine, but I'm still nervous about moving the main site there. I have no budget to work with (so no software or services that require money), although due to recent cut backs I have several older desktops that I could use if it helps. The site doesn't need to withstand massive amounts of traffic (it's a Drupal site just a few thousand visitors a day), but I would like to put it through a bit of it paces before moving the main site over. What are cheap tools that I can use to get a sense if the server can withstand even low levels of traffic? I'm not looking to test the site itself yet, just fundamental operation of the server.

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• Pantheon Not Completely Installed?

  - by Simon

  I have just installed the pantheon shell today, and I have not found any help with this yet. I am not just a random noob, i use a bunch of other shells and i also have a few development applications on my copy of ubuntu. But ever since ive opened up pantheon, i cannot find settings or this thing called the launchpad. (if the launchpad is the app drawer up in the upper left corner, or if its the dock. i have it, if thats not what launchpad is, then i cant access it.) I can only change my wallpaper by going back to unity, gnome, or KDE. There is a system settings in the power menu (upper right), but it only has Language Support, Ubuntu One, Additional Drivers, And Printing. I can still access the full ubuntu settings in GNOME of Unity. But thats it. I installed in the terminal, uninstalled, and reinstalled using the software center. Please Help Me If Any Of You Can! Thanks!!!

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• Email server for huge number of subscriber

  - by bogha

  My question is that my company is thinking of providing a free email account for each of its customers. As a new company we will assume that our corporate email system will be MS Exchange server which will support about 1000 employees. They are asking why not adding the customer list to be a part of Exchange users. My suggestion was to separate the two systems, for the corporate we can use Exchange but for customers (around 30000) we have to use a Linux based system. My only argument was that Linux can be used for enterprise services like this and Microsoft may fail. What do you suggest? And if you are with me on choosing Linux as the server platform, what do you suggest to use as an alternative for Exchange in Linux? Thank you.

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• Extreme Portability: OpenJDK 7 and GlassFish 3.1.1 on Power Mac G5!

  - by MarkH

  Occasionally you hear someone grumble about platform support for some portion or combination of the Java product "stack". As you're about to see, this really is not as much of a problem as you might think. Our friend John Yeary was able to pull off a pretty slick feat with his vintage Power Mac G5. In his words: Using a build script sent to me by Kurt Miller, build recommendations from Kelly O'Hair, and the great work of the BSD Port team... I created a new build of OpenJDK 7 for my PPC based system using the Zero VM. The results are fantastic. I can run GlassFish 3.1.1 along with all my enterprise applications. I recently had the opportunity to pick up an old G5 for little money and passed on it. What would I do with it? At the time, I didn't think it would be more than a space-consuming novelty. Turns out...I could have had some fun and a useful piece of hardware at the same time. Maybe it's time to go bargain-hunting again. For more information about repurposing classic Apple hardware and learning a few JDK-related tricks in the process, visit John's site for the full article, available here. All the best,Mark

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• Matrices: Arrays or separate member variables?

  - by bjz

  I'm teaching myself 3D maths and in the process building my own rudimentary engine (of sorts). I was wondering what would be the best way to structure my matrix class. There are a few options: Separate member variables: struct Mat4 { float m11, m12, m13, m14, m21, m22, m23, m24, m31, m32, m33, m34, m41, m42, m43, m44; // methods } A multi-dimensional array: struct Mat4 { float[4][4] m; // methods } An array of vectors struct Mat4 { Vec4[4] m; // methods } I'm guessing there would be positives and negatives to each. From 3D Math Primer for Graphics and Game Development, 2nd Edition p.155: Matrices use 1-based indices, so the first row and column are numbered 1. For example, a12 (read “a one two,” not “a twelve”) is the element in the first row, second column. Notice that this is different from programming languages such as C++ and Java, which use 0-based array indices. A matrix does not have a column 0 or row 0. This difference in indexing can cause some confusion if matrices are stored using an actual array data type. For this reason, it’s common for classes that store small, fixed size matrices of the type used for geometric purposes to give each element its own named member variable, such as float a11, instead of using the language’s native array support with something like float elem[3][3]. So that's one vote for method one. Is this really the accepted way to do things? It seems rather unwieldy if the only benefit would be sticking with the conventional math notation.

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• How to invoke a command using specific proxy server?

  - by Xiè Jìléi

  Some applications support proxy (http proxy or socks proxy), and some are not. For browsers, I can specify proxy server in the preferences/options dialog, and other applications may be able to configure proxy servers in config files. For general purpose, can I invoke a command using a specific proxy? Like following: $ proxy-exec --type sock5 --server 1.2.3.4:8000 -- wget/ftp ... I'm using Ubuntu Maverick. P.S. In win32, it can be implemented by hijacking the socket dlls, maybe, I'm not familiar with Linux programming, but I guess it's possible in Linux. though.

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• Unity , libgdx, or something else to develop my first game for Android?

  - by capcom

  I want to start by saying that I absolutely love Unity (even more when I team it up with Blender). I really want to start developing games for Android, but it seems like Unity poses way too many roadblocks in terms of which devices it supports (and even if it does support them, it doesn't work well on all of them). I've been looking around for alternatives, and found something called libgdx. Well, it's nothing like Unity unfortunately, but at least it seems like I may be able to reach a larger audience in the market. I'd like to start by making 2D games, but with 3D graphics (say, imported from Blender). I can do this very easily in Unity, and it seems like it should be alright with libgdx too. But I really want to know if ditching Unity is a smart idea, considering how comfortable I am with it already, and how much I like it. Finally, is libgdx something you would recommend considering my requirements/situation? BTW, I am quite familiar with Eclipse too. Many thanks. Feel free to request further details.

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• Tool to test a user account and password (test login)

  - by TheCleaner

  Yeah, I can fire up a VM or remote into something and try the password...I know...but is there a tool or script that will simulate a login just enough to confirm or deny that the password is correct? Scenario: A server service account's password is "forgotten"...but we think we know what it is. I'd like to pass the credentials to something and have it kick back with "correct password" or "incorrect password". I even thought about a drive mapping script with that user account and password being passed to see if it mapped the drive successfully or not but got lost in the logic of making it work correctly...something like: -Script asks for username via msgbox -script asks for password via msgbox -script tries to map a drive to a common share that everyone has access to -script unmaps drive if successful -script returns popup msgbox stating "Correct Password" or else "Incorrect Password" Any help is appreciated...you'd think this would be a rare occurrence not requiring a tool to support it but...well....

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• Mail being sent as root on Ubuntu 14.04

  - by Benjamin Allison

  I'm really struggling with this. I'm trying to set up this server to send mail using Gmail's SMTP. Google keeps bouncing the messages, saying that that Authentication is required: smtp.gmail.com[74.125.196.109]:25: 530-5.5.1 Authentication Required. Learn more at smtp.gmail.com[74.125.196.109]:25: 530 5.5.1 http://support.google.com/mail/bin/answer.py?answer=14257 But it seems my server is trying to send mail as [email protected]. I'm baffled. Here's what I've done so far: Updated mail.cf relayhost = [smtp.gmail.com]:587 smtp_sasl_auth_enable = yes smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd smtp_sasl_security_options = noanonymous smtp_tls_CAfile = /etc/postfix/cacert.pem smtp_use_tls = yes Created /etc/postfix/sasl_passwd: [smtp.gmail.com]:587 [email protected]:password Then did the following: sudo chmod 400 /etc/postfix/sasl_passwd sudo postmap /etc/postfix/sasl_passwd cat /etc/ssl/certs/Thawte_Premium_Server_CA.pem | sudo tee -a /etc/postfix/cacert.pem service postfix restart I can't for the life me get a mail message to send, or change the default mail user from [email protected] to [email protected] (FWIW, I'm using Google Apps, that's why it's not a .gmail address).

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• Problems setting Hyper-V permissions

  - by Drew Burchett

  I am using a Windows 2012 Hyper-V server to host some test PCs. Our support personnel should be able to take snapshots of these machines and roll a test machine back to a specific snapshot, but they should not have any other permissions. I have followed the directions in this article and, on suggestion of another article have added the specific AD group to the local Hyper-V Administrators group, but whenever one of them attempts to connect to the server to take a snapshot, they get an error stating that they do not have permission to connect to that server. I'm sure I'm missing something, but at this point I'm at a loss as to what that would be. Can anyone tell me how to properly set these permissions? edit: Per request I am attaching a screenshot of the permissions I have set for this group.

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• How do I improve picture quality while streaming live football (soccer) from my Dell D600 to an HDTV?

  - by Bob

  I have fibre broadband with speeds up to 38mbs, my Dell D600 has its max 2gb ram and has an ATI Mobility RADEON 9000 4xAGP 32mb card in it...Its TV support it says is NTSC or PAL in S-video and composite modes with a 7-pin mini-DIN connector (optional S-video to composite video adapter cable) and a vga port which i am using at the moment... The laptop runs Windows XP, an 80g HD with only windows + necessary updates and anti virus software on it..... There is HDMI on the TV, but not the laptop Fairly slow moving and close up pictures arent too bad, but when the movment is fast(a shot on goal) or in the distance, I cant see the ball and the images go out of focus.

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• WinXP on VPC - Unable to change the way users log on or off

  - by kamleshrao

  On my Win7 computer, I have setup a new Win-XP VPC. In the VPC window, when I click Ctrl+Alt+Del, it shows me Windows Task Manager. As per MS KB [ http://support.microsoft.com/kb/281980 ], we can change this behavior to show the regular Windows Security window. But while making this change, I am getting the following error: User Accounts Fast User Switching cannot be turned off from a remote connection to this computer. Log on to the computer locally to turn off Fast User Switching. OK Is there any way I can fix this setting?

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• A Better Way to Plan, Execute and Manage Enterprise Architecture

  - by JuergenKress

  IT Strategies from Oracle is an authorized library of guidelines and reference architectures that will help you better plan, execute, and manage your enterprise architecture and IT initiatives. The IT Strategies from Oracle library offers two types of best practice documents: practitioner guides containing pragmatic advice and approaches, and reference architectures containing the proven technology patterns to jumpstart your initiative. The IT Strategies from Oracle library can help you establish a reliable set of principles and standards to guide your use of Oracle technology. We will expand this library over time across all of Oracle's technologies. Today, you can access: Overview documents providing an introduction to all the resources available in the library and best practices maturity models Oracle Reference Architectures covering the application infrastructure foundation, management and monitoring, security, software engineering, service-oriented integration, service orientation, user interaction, engineered systems, and a master glossary. Enterprise Technology Strategies for Service-Oriented Architecture offering practitioner guides on creating a SOA roadmap, frameworks for governance, determining ROI, identifying services, software engineering, and white papers. Enterprise Technology Strategies for Event-Driven Architecture offering practitioner guides on creating an EDA roadmap and reference architectures on an EDA foundation and EDA infrastructure. Enterprise Technology Strategies for Business Process Management including practitioner guides on creating a BPM roadmap, business process engineering, governance, and reference architectures on a BPM foundation and BPM infrastructure. Enterprise Technology Strategies for Cloud Computing including reference architectures on a Cloud foundation and Cloud infrastructure. Enterprise Technology Strategies for Business Analytics includes a practitioner guide for creating a BA roadmap, and reference architectures for a BA foundation and BA infrastructure. Get the Oracle Enterprise Architecture content here. SOA & BPM Partner Community For regular information on Oracle SOA Suite become a member in the SOA & BPM Partner Community for registration please visit www.oracle.com/goto/emea/soa (OPN account required) If you need support with your account please contact the Oracle Partner Business Center. Blog Twitter LinkedIn Facebook Wiki Mix Forum Technorati Tags: Architecture,SOA Community,Oracle SOA,Oracle BPM,Community,OPN,Jürgen Kress

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• Inverting colors of a PDF

  - by legr3c

  I need to invert all the colors of a PDF document (background, text, graphics, and images). I want it persistent in the file so the inverted viewing options, that some viewers offer, won't help. Rasterizing the document and using image manipulation software is also not an option. I read somewhere that this can be done with the Enfocus PitStop plugin for Acrobat. However I didn't see a corresponding command anywhere. Am I missing something? Then I read that the ARTS PDF Crackerjack plugin for Acrobat offers negative printing so I tried that, too. The option is there but it simply doesn't work. I have been searching for very long for a way to do this. It seems like a common enough task but I just can't find out how to do it. Are there maybe any virtual printer drivers or something of the sort that support negative printing? Can anyone help?

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• How does pptpd (poptop) or pppd work with eap-tls and mppe-128?

  - by Henk

  To create a VPN I've installed pptpd on an Ubuntu domU (Debian domUs can also be created). MSCHAPv2 isn't a very strong authentication protocol so I'd like to use EAP-TLS. I've set up a FreeRADIUS server and certificates for EAP-TLS before (for use with WPA), and I've also set up a pptp server with mschap-v2 auth, but I can't figure out how to combine the two. Maybe pppd can use EAP-TLS on its own, but I can't find support for it in the Ubuntu package. If I need to patch the package, that's fine, I know how to patch Debian packages (provided the patch applies cleanly). Also, can MPPE still be used when pppd is configured to use EAP? Because it says in the manual several times that MPPE requires MSCHAP. However, other docs like this one: http://www.nikhef.nl/~janjust/ppp/ seem to refute that. The clients are running Mac OS X Leopard and GNU/Linux, there's no need to fix anything for Windows.

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• Static noise coming from my laptop

  - by joanna

  Replaced motherboard; speakers; put in an additional fan; but this did not stop the static noise. This was done by inhouse tech. support from Sony. If i turn my speakers mute; the sound is still there! Can't hear it through headphones. I was told it is feedback noise! Now I'm suppose to send my $2,000.00 computer through the mail to get fixed? I'm terrified it'll come back in terrible condition during the travel time? Help?

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• What is involved with writing a lobby server?

  - by Kira

  So I'm writing a Chess matchmaking system based on a Lobby view with gaming rooms, general chat etc. So far I have a working prototype but I have big doubts regarding some things I did with the server. Writing a gaming lobby server is a new programming experience to me and so I don't have a clear nor precise programming model for it. I also couldn't find a paper that describes how it should work. I ordered "Java Network Programming 3rd edition" from Amazon and still waiting for shipment, hopefully I'll find some useful examples/information in this book. Meanwhile, I'd like to gather your opinions and see how you would handle some things so I can learn how to write a server correctly. Here are a few questions off the top of my head: (may be more will come) First, let's define what a server does. It's primary functionality is to hold TCP connections with clients, listen to the events they generate and dispatch them to the other players. But is there more to it than that? Should I use one thread per client? If so, 300 clients = 300 threads. Isn't that too much? What hardware is needed to support that? And how much bandwidth does a lobby consume then approx? What kind of data structure should be used to hold the clients' sockets? How do you protect it from concurrent modification (eg. a player enters or exists the lobby) when iterating through it to dispatch an event without hurting throughput? Is ConcurrentHashMap the correct answer here, or are there some techniques I should know? When a user enters the lobby, what mechanism would you use to transfer the state of the lobby to him? And while this is happening, where do the other events bubble up? Screenshot : http://imageshack.us/photo/my-images/695/sansrewyh.png/

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• E-Bus ATG Advisor Webcast program - June Edition

  - by cwarticki

  E-Business Suite Applications Technology Group (ATG) Advisor Webcast Program – June 2014 Thursday June 12, 2014 at 18:00 UK / 10:00 PST / 11:00 MST / 13:00 EST EBS Patch Wizard Overview ·      What is Oracle EBS Patch Wizard Tool? ·      Benefits of the Patch Wizard utility ·      Patch Wizard Interface ·      Patch Impact Analysis Details & Registration : Note 1672371.1 Direct registration link Thursday June 26, 2014 at 18:00 UK / 10:00 PST / 11:00 MST / 13:00 EST EBS Proactive Analyzers Overview ·         What are Oracle Support Analyzers? ·         How to identify the Analyzers available? ·         Short Analyzers Overview ·         Patch Impact Analysis ·         How to use an Analyzer? Details & Registration : Note 1672363.1 Direct registration link If you have any question about the schedules or if you have a suggestion for an Advisor Webcast to be planned in future, please send an E-Mail to Ruediger Ziegler.

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• Advice on reconciling discordant data

  - by Justin

  Let me support my question with a quick scenario. We're writing an app for family meal planning. We'll produce daily plans with a target calorie goal and meals to achieve it for our nuclear family. Our calorie goal will be calculated for each person from their attributes (gender, age, weight, activity level). The weight attribute is the simplest example here. When Dad (the fascist nerd who is inflicting this on his family) first uses the application he throws approximate values into it for Daughter. He thinks she is 5'2" (157 cm) and 125 lbs (56kg). The next day Mom sits down to generate the menu and looks back over what the bumbling Dad did, quietly fumes that he can never recall anything about the family, and says the value is really 118 lbs! This is the first introduction of the discord. It seems, in this scenario, Mom is probably more correct that Dad. Though both are only an approximation of the actual value. The next day the dear Daughter decides to use the program and sees her weight listed. With the vanity only a teenager could muster she changes the weight to 110 lbs. Later that day the Mom returns home from a doctor's visit the Daughter needed and decides that it would be a good idea to update her Daughter's weight in the program. Hooray, another value, this time 117 lbs. Now how do you reconcile these data points? Measurement error, confidence in parties, bias, and more all confound the data. In some idealized world we'd have a weight authority of some nature providing the one and only truth. How about in our world though? And the icing on the cake is that this single data point changes over time. How have you guys solved or managed this conflict?

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• Fosfor EPUB Reader

  - by Geertjan

  Instead of creating a fullblown NetBeans Platform application for doing WYSIWYG editing for EPUB, similar to Sigil, I decided to focus purely on the very narrow scope of EPUB reading. The scope is narrower and, since the application will be a lot less ambitious and smaller, a pure JavaFX implementation makes sense. When you somehow get, e.g., buy, an EPUB file, you typically read it on a tablet or mobile device. However, some people in the world, e.g., me, still have laptops. Therefore, I'm creating a small JavaFX application that unzips EPUB files, into a temp directory, and then loads them into a JavaFX WebView. Arabic support: For an application like this, simplicity is the most important thing. Very few buttons, very few options, preferably no configuration of anything. Just let the user open the EPUB file and read it, that's it, nothing fancy. CSS stylesheets and images are correctly read. It's exactly what it looks like, a reader for EPUB files. The back and forward buttons are working and you can also switch to the table of contents. When it is complete, which it pretty much is right now, publishers of EPUB files can make this small app available from their site, to simplify life for their readers, since it will run easily and well on all operating systems.

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• Stylecop 4.7.36.0 is out!

  - by TATWORTH

  Stylecop 4.7.36.0 has been released at http://stylecop.codeplex.com/releases/view/79972This is an update to coincide with the latest ReSharper. The full fix list is:4.7.36.0 (508dbac00ffc)=======================Fix for 7344. Don't throw 1126 inside default expressions.Fix for 7371. Compare Namespace parts using the CurrentCulture and not InvariantCulture.Fix for 7386. Don't throw casing violations for filed names in languages that do not support case (like Chinese). Added new tests.fix for 7380. Catch Exception caused by CRM Toolkit.Update ReSharper 7.0 dependency to 7.0.1 (7.0.1098.2760)Fix for 7358. Use the RuleId in the call to MSBuild Logging.Fix for 7348. Update suggestion text for constructors.Fix for 7364. Don't throw 1126 for New Array Expressions.Fix for 7372. Throw 1126 inside catch blocks wasn't working. Add new tests.Fix for 7369. Await is allowed to be inside parenthesis. Add new tests.Fix testsCorrect styling issues.Fix for 7373. Typeparam violations were not being thrown in all cases. Added new tests.Fix for 7361. Rule 1120 was logging against the root element and so Suppressions wouldn't work. Fixed and added tests.Updating de-DE resources - from Michael Diermeier - thank you.Change for 7368. Add the violation count into the Task outputs.Fix for 7383. Fix for memory leak in plugins.Update environment to detect ReSharper 7Fix for 7378. Null reference exception from command line run in message output.Update release history.

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• shrink ext4 partition

  - by user276851

  My question is similar to Move ext4 partition, but the challenge I couldn't figure out is how to shrink a partition from the start. So suppose originally the partition (with raid) is like this. (************** /dev/md127 ***************) After resizing, I want to achieve like this. (*** unallocated ***)(**** /dev/md127 ****) Note, I cannot use gparted, and parted does not support ext4. The commands I have tried so far, % resize2fs -p /dev/md127 1676G # <== This is good. % lvreduce -L 1676G /dev/md127 Path required for Logical Volume "md127" Please provide a volume group name Run `lvreduce --help' for more information. Failed here, I guess it may be because the underlying partition is primary and the lvreduce only works on logical? Anyway, no idea. Then after that, I am thinking to create another partition right after this one, copy the data to that partition, and remove this one, like. 1. (************** /dev/md127 ***************) 2. (**** /dev/md127 ****)(*** new partition **) 3. (*** unallocated ****)(**** /dev/md127 ****) Thanks for the help.

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• iPad revocable vpn access

  - by carpat

  I'm a programmer at my organization, but somehow got drafted into looking into some server stuff so forgive me of my ignorance: They want to give our sales people secure access to our internal sites using their iPads. This must be secure (obviously) but also revocable from the company's side (if someone quits they can no longer access our network). I see from http://support.apple.com/kb/HT1288 that the iPad supports "RSA SecurID", "CRYPTOCard", and "Kerberos" authentication methods. Will one of these do what we need? Are there any major differences between them?

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• wildcard host name bindings for multiple subdomains in multiple sites on IIS7 with a single IP address

  - by orca

  Situation: I have a single windows 2008 server with a single public IP address. I have multiple domains with wildcard A records pointing to the single IP address. I need each domain to be hosted by a different web site. (i.e. www.domain1.com by site domain1site) I need domain1.com to act like www.domain1.com I need each site to be able to have multiple subdomains (i.e. www.domain1.com, abc.domain1.com, xyz.domain1.com) Not relevant yet here it goes, I plan to handle each subdomain by a different application hosted in the same site (i.e. application /xyz in domain1site) However I found out that IIS7 does not support creating web sites with wildcard host name binding and setting it without any subdomain (i.e. domain1.com) does not work, even for www.domain1.com. Is there a simple solution? Does any IIS Extension like Application Request Routing provide such capability?

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• Multiple connections to the same Wireless Network in Windows 7

  - by Jamek

  Hello, my university just limited bandwidth to 512 kbps (that's 64 kB/s!) for each connection. I was thinking to make multiple connection to the same wireless network (called "internet"), is this possible under Windows 7? I know it's possible to connect to more than one WLAN through the "hostednetwork" concept in netsh: netsh wlan set hostednetwork mode=allow ssid=xxxxx netsh wlan start hostednetwork However this method doesn't seem to work, I don't know if it's due to the authentication method (through certificates while hostednetwork seems to support just a "passphrase") or because I'm already connected to that network with the same MAC. Can you think to some tool able to do this?

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