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  • What steps can you take to ensure sane build environments when compiling software?

    - by Chris Adams
    Hi guys, I've been stuck with a compilation problem when building a standardised virtual machine on CentOS 5.4, and I'm in the dark here as to a) why this error is occurring, and b) how to fix it, and in the hope that someone else stumbles across this problem too, I'm hoping someone can help me find the solution here. I'm getting a configure: error: newly created file is older than distributed files! error when trying to compile Ruby Enterprise like below when I try to run the installer, and the solutions offered to on the forums (of checking the tine, and touching the files to update the time associated with them) don't seem to be helping here. What steps can I take to work out what the cause of this problem? [vagrant@vagrant-centos-5 ruby-enterprise-1.8.7-2009.10]$ sudo ./installer Welcome to the Ruby Enterprise Edition installer This installer will help you install Ruby Enterprise Edition 1.8.7-2009.10. Don't worry, none of your system files will be touched if you don't want them to, so there is no risk that things will screw up. You can expect this from the installation process: 1. Ruby Enterprise Edition will be compiled and optimized for speed for this system. 2. Ruby on Rails will be installed for Ruby Enterprise Edition. 3. You will learn how to tell Phusion Passenger to use Ruby Enterprise Edition instead of regular Ruby. Press Enter to continue, or Ctrl-C to abort. Checking for required software... * C compiler... found at /usr/bin/gcc * C++ compiler... found at /usr/bin/g++ * The 'make' tool... found at /usr/bin/make * Zlib development headers... found * OpenSSL development headers... found * GNU Readline development headers... found -------------------------------------------- Target directory Where would you like to install Ruby Enterprise Edition to? (All Ruby Enterprise Edition files will be put inside that directory.) [/opt/ruby-enterprise] : -------------------------------------------- Compiling and optimizing the memory allocator for Ruby Enterprise Edition In the mean time, feel free to grab a cup of coffee. ./configure --prefix=/opt/ruby-enterprise --disable-dependency-tracking checking build system type... i686-pc-linux-gnu checking host system type... i686-pc-linux-gnu checking for a BSD-compatible install... /usr/bin/install -c checking whether build environment is sane... configure: error: newly created file is older than distributed files! Check your system clock This is a virtual machine running on virtualbox, and the time of the host and the virtual machine are identical, and up to date. I've also tried running this after updating time with an ntp-client, so no avail. I tried this after reading this post here of someone having a similar problem [vagrant@vagrant-centos-5 ruby-enterprise-1.8.7-2009.10]$ date Tue Apr 27 08:09:05 BST 2010 The other approach I've tried is to touch the top level the files in the build folder like suggested here, but this hasn't worked either (an to be honest, I'm not sure why it would have worked either) [vagrant@vagrant-centos-5 ruby-enterprise-1.8.7-2009.10]$ sudo touch ruby-enterprise-1.8.7-2009.10/* I'm not sure what I can do next here - the problem seems to be the bash configure script that returns this error error: newly created file is older than distributed files!, at line :2214 { echo "$as_me:$LINENO: checking whether build environment is sane" >&5 echo $ECHO_N "checking whether build environment is sane... $ECHO_C" >&6; } # Just in case sleep 1 echo timestamp > conftest.file # Do `set' in a subshell so we don't clobber the current shell's # arguments. Must try -L first in case configure is actually a # symlink; some systems play weird games with the mod time of symlinks # (eg FreeBSD returns the mod time of the symlink's containing # directory). if ( set X `ls -Lt $srcdir/configure conftest.file 2> /dev/null` if test "$*" = "X"; then # -L didn't work. set X `ls -t $srcdir/configure conftest.file` fi rm -f conftest.file if test "$*" != "X $srcdir/configure conftest.file" \ && test "$*" != "X conftest.file $srcdir/configure"; then # If neither matched, then we have a broken ls. This can happen # if, for instance, CONFIG_SHELL is bash and it inherits a # broken ls alias from the environment. This has actually # happened. Such a system could not be considered "sane". { { echo "$as_me:$LINENO: error: ls -t appears to fail. Make sure there is not a broken alias in your environment" >&5 echo "$as_me: error: ls -t appears to fail. Make sure there is not a broken alias in your environment" >&2;} { (exit 1); exit 1; }; } fi ### PROBLEM LINE #### # this line is the problem line - this is returned true, sometimes it isn't and I can't # see a pattern that that determines when this will test will pass or not. test "$2" = conftest.file ) then # Ok. : else { { echo "$as_me:$LINENO: error: newly created file is older than distributed files! Check your system clock" >&5 echo "$as_me: error: newly created file is older than distributed files! Check your system clock" >&2;} { (exit 1); exit 1; }; } fi the thing that makes this really frustrating is that this script works sometimes, when the VM has been running for an hour or so it works, but not at boot. There's nothing I see in the crontab that suggests any hourly tasks are run that might change the state of the system enough make a difference to this script working. I'm totally at a loss when it comes to debugging beyond here. What's the best approach to take here? Thanks

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  • FreeNX is very unresponsive compare to VNC when using over LAN

    - by Phuong Nguyen
    I find FreeNX is quite unresponsive compare to VNC when using over LAN. I run Netbeans inside a Quad Core Server and remote desktop to it through both NX & VNC. For VNC, the screen will be nicely updated as I scroll the Netbean IDE For FreeNX, flickering happened and the mouse cursor become unresponsive as I tried to do the samething. Have anyone encountered the same? I don't like VNC because when VNC doesnot correctly understand the "Windows" key (interpreted as Super L instead of Mod) Is there any adjustment that can avoid that annoyance? I have tried both FreeNX-Server and NeatX-Server and both resulted in the same unresponsiveness.

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  • URL Redirection in Multisite wordpress

    - by Toqeer
    We have multi-site wordpress containing more then 50 blogs/sub-site. Our base URL to wordpress site is www.example.com/base-site/ and we have other sub-sites in it like www.example.com/base-site/site1 site2 ... etc. Now My question is to redirect the main-site to one of the subsites but a simple redirect 301 is not working. I tried some solutions of mod-rewrite but its not working either for this main-site to redirect to sub-site. A solution is required to Redirect www.example.com/base-site/ to www.example.com/base-site/site1 Solution used so far but not working for me solution1 solution2

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  • Windows Server 2008 Standard vs. Web

    - by Andreas
    I'm currently comparing Windows Server 2008 versions to see what to use. What i found is this, that might affect me: RAM: 32GB. (the same) Sockets: 4 (the same) Remote Desktop: 2 (the same) IIS: true (the same) Application Server: Only standard. I will run my server as a single CPU (4 core) 8GB RAM, 2x raid1 web-server running: IIS Asp.net .Net 4 Third part mail server. (Only for sending mail from my web-application) SQL Server Express (My data is not more then 10 GB) Some minor applications for import and export of data. I might use external load balancer if I install a second machine in the future. My question is if you see any reason for me to go for standard that is 4 x price compared to web. BR Andreas

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  • Best Linux distro for load-balancers?

    - by Vimvq1987
    I wanted to try HAProxy/Linux Virtual Server like front-end load-balancers, but as far I know, they're Linux-based software. I don't have any experiences with Linux yet. so there're quite many questions to ask: What is the best Linux distro(s) for load-balancing? I plan to use VirtualPC to run some virtual machines. How much RAM is the best for each machine run that distro? I want to simulate a load-balancer with can handle about 100 hits/second, is it possible? Thank you very much!

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  • Ideas for scaling out database architecture

    - by andrew
    We're looking to scale out our existing database architecture and need some advice on which way to go. We currently have 2 web servers behind a load balancer that both read & write to a single master database which replicates to a slave. Ideally, I'd like each of the webservers to point to their own master DB and have the data between the 2 synchronised but from what I've read, using any kind of master-master or ring-replication is discouraged. I'm looking for a general "what do other people do" kind of answer - database vendor isn't a concern at the moment but we'd like to stay with MySQL or convert to MSSQL. Any ideas would be gratefully received. Many thanks, Andrew

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  • Whole Lotta Virtualization Goin' On

    - by rickramsey
    Lately we've published a lot of content about virtualization. Here's a sampling. Podcat: Technology Preview of Transcendent Memory Turns out that in a virtual environment, RAM is the bottleneck. Not because it's slow, it's not, but because each CPU still had to use its own RAM. Which gets expensive. In this podcast, Dan Magenheimer describes how Oracle and the open source community taught the guest kernel in Oracle Linux to share its memory with other CPU's. Transcendent memory will wind up saving large data centers a lot of money. Find out how. Tech Article: How to Use Oracle VM Templates This article describes how to prepare an Oracle VM environment to use Oracle VM Templates, how to obtain a template, and how to deploy the template to your Oracle VM environment. It also describes how to create a virtual machine based on that template and how you can clone the template and change the clone's configuration. Tech Article: How to Set Up a Load Balanced Application Across Two Oracle Solaris Zones Install Apache Tomcat on two Oracle Solaris zones. Connect them across a VPN. And let the Integrated Load Balancer in Oracle Solaris 11 manage traffic. Presto: high(er) availability in a single server. Tech Article: How to Install Oracle RAC on Oracle Solaris Zone Clusters Learn how to implement a multi-tiered database environment that isolates database tiers and administrative domains, while taking advantage of centralized (and simpler) cluster admin. For fans of Jerry Lee Lewis If you're a fan of Jerry Lee Lewis, you might enjoy this video. - Rick Website Newsletter Facebook Twitter

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  • Apache, and logrotate instances

    - by OlivierDofus
    Hi! If I have one website and I want to rotate its logs, there's one instance of logrotate that is launched. There are as many logrotate instances launched as they are virtual websites. Here you can find mod_log_rotate, with a 1.3 version and (only) 2.0 version: http://www.hexten.net/wiki/index.php/Mod-log-rotate It's 6 years old. Is there something new, or maybe is there something like that in recent Apache versions? I didn't find anything like that, and I don't know if this code is still "usable" for recent Apache versions (2.2.x) Don't hesitate to edit my post to make it proper English, thanks a lot!

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  • Is it possible to rent an IP address to mask the server real IP address?

    - by net-girl
    A customer would like to lease an IP address and point it to a dedicated web server with the intention of "masking" the server's IP address so it would be difficult to tell where the site is hosted. I found a company that leases IP addresses here: http://www.webhostingtalk.com/showthread.php?t=1191688 Is this even possible? Can they rent an IP address from a 3rd party in order to hide the server's IP address? Update: My client will be hosting a government leaks site and is trying to become Raid-Proof similar to what the pirate bay did: http://torrentfreak.com/pirate-bay-moves-to-the-cloud-becomes-raid-proof-121017/ Only that I'm worried about using a reverse proxy because of the latency it could cause having the app servers hosted in one data center and the load balancer/reverse proxy in other and also having to pay twice for bandwidth.

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  • Can I use nginx to start EC2 instances on demand?

    - by Gabe Hollombe
    TL;DR - Is there a way to make nginx act as an elastic load balancer that will spin up EC2 instances on demand, allowing for the case when periods of no demand mean no instances will be running? Longer explanation - I have an nginx server that proxy_pass'es requests to a server on EC2. This server doesn't get many requests, so I'd like to keep the server spun down during periods of inactivity (I already have a script to do this). Then, when the instance is spun down and nginx gets a request for that instance, it will time out when trying to get a response from it. At this point, can I somehow trigger a shell command on the server to use EC2's command line tools to spin up the instance, then re-try the user's request after it has started?

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  • CodePlex Daily Summary for Tuesday, September 04, 2012

    CodePlex Daily Summary for Tuesday, September 04, 2012Popular ReleasesPE file reader: READPE-e9ff717a638d.zip: Introduced some new code which parses the IMAGENTHEADERS. At the moment the command line options dosheader and imagentheaders are working and and example of their usage can be... D:\>readpe pe-files\main.exe dosheader imagentheadersMicrosoft Ajax Minifier: Microsoft Ajax Minifier 4.64: Another attempt to fix the fiasco that was my bad decision to rename the DLLs to get away from a strong-name collision that was causing lots of problems for me. Too many existing projects expected AjaxMin.dll, and lots of things broke downstream from me. This release keeps the .net 2.0 version named AjaxMin.dll. The new .net 3.5 and .net 4.0 versions are named AjaxMinLibrary.dll. If an existing project is expecting the old name, they should continue to pick up the .net 2.0 version (since the ...Nearforums - ASP.NET MVC forum engine: Nearforums v8.5: Version 8.5 of Nearforums, the ASP.NET MVC Forum Engine. New features include: Built-in search engine using Lucene.NET Flood control improvements Notifications improvements: sync option and mail body View Roadmap for more details webdeploy package sha1 checksum: 961aff884a9187b6e8a86d68913cdd31f8deaf83NWebsec: NWebsec 1.0.3: This release fixes two bugs in the NWebsec.Mvc package. Go get it on NuGet! http://nuget.org/packages/NWebsec.Mvc/ These work items made it into the release: 9 10 Check out the Documentation to learn how it works. This release has been tagged v1.0.3 in source control. Enjoy!RBAC Manager R2 for Exchange 2010 SP2, Exchange 2013 Preview and Office 365: RBAC Manager R2 1.5.5.0: now supports to manage RBAC on Office 365 'remember password' feature now saves the password as encrypted as opposed to plain-text format in version 1.5.0.0 DPAPI is used to encrypt the saved password; for more information about DPAPI please check: Managed DPAPI Part I: ProtectedData http://blogs.msdn.com/b/shawnfa/archive/2004/05/05/126825.aspx The tool requires HTTP/HTTPS network connection to the Exchange server Known Bugs: Active Directory lookup is not working remotely and crashes the ...WiX Toolset: WiX Toolset v3.6: WiX Toolset v3.6 introduces the Burn bootstrapper/chaining engine and support for Visual Studio 2012 and .NET Framework 4.5. Other minor functionality includes: WixDependencyExtension supports dependency checking among MSI packages. WixFirewallExtension supports more features of Windows Firewall. WixTagExtension supports Software Id Tagging. WixUtilExtension now supports recursive directory deletion. Melt simplifies pure-WiX patching by extracting .msi package content and updating .w...Iveely Search Engine: Iveely Search Engine (0.2.0): ????ISE?0.1.0??,?????,ISE?0.2.0?????????,???????,????????20???follow?ISE,????,??ISE??????????,??????????,?????????,?????????0.2.0??????,??????????。 Iveely Search Engine ?0.2.0?????????“??????????”,??????,?????????,???????,???????????????????,????、????????????。???0.1.0????????????: 1. ??“????” ??。??????????,?????????,???????????????????。??:????????,????????????,??????????????????。??????。 2. ??“????”??。?0.1.0??????,???????,???????????????,?????????????,????????,?0.2.0?,???????...GmailDefaultMaker: GmailDefaultMaker 3.0.0.2: Add QQ Mail BugfixSmart Data Access layer: Smart Data access Layer Ver 3: In this version support executing inline query is added. Check Documentation section for detail.Dynamics AX Build Scripts: AX TFS Build Library Beta - v0.2.0.0: Beta release of TFS 2010 workflow code activities for AX 2009 and AX 2012. Build template for AX 2012 included. There is one refactor of code that will break your existing workflows. The AOS workflow step to stop/start AOS now expects the actual windows service name, not the port number of the AOS. There now is a new step to retrieve server settings, which can get the service identifier based on the port number. The registry has to be read to retrieve these settings, and we didn't want to ke...Cosmo OS: Cosmo OS Lama Preview: Info Sulla Release Lama Preview ( Prima Preview Pubblica ) Data Di Rilascio: 2 / 09 / 12 Build: 1950 Ramo Di Sviluppo: cosmo_os.preview.lama.bid1535543 Tipo Release: Stable / PreviewNETDeob0: NETDeob 0.3.1 BETA binaries: 0.3.1Custom Captcha Plugin for Kooboo CMS for adding content or sending feedback: Custom Captcha Validator Plugin v1.1 for Kooboo: Download file CustomCaptchaValidatorPlugin.dll and install it to KooBoo CMS. Release 1.1: Fixed error: "A generic error occurred in GDI+" (if hosting is less than Windows Server 2008 or Windows 7) - http://forum.kooboo.com/yafpostsm6602Custom-captcha---any-best-practice.aspx#post6602TSQL Code Smells Finder: POC 1.01: Proof of concept 1.01 TSQLDomTest.ps1 and Errors.Txt are requiredSaturn Kinect: Saturn Kinect + Sample Applications - Release 3: This release includes : - Saturn Kinect Library - Kinect Motion Capture Application - Controlling mouse cursor sample - Hand swip detection sample + Source CodesDiscuzViet: DiscuzX2.5_02092012_Vietnam: DiscuzX2.502092012VietnamBookmark Collector: 01.00.00: This is the first release with a minimal feature set. You can save, edit, delete, and display a list of URLs from various sites.EntLib.com????????: EntLib.com???????? v3.0: EntLib eCommerce Solution ???Microsoft .Net Framework?????????????????????。Coevery - Free CRM: Coevery 1.0.0.24: Add a sample database, and installation instructions.Math.NET Numerics: Math.NET Numerics v2.2.1: Major linear algebra rework since v2.1, now available on Codeplex as well (previous versions were only available via NuGet). Since v2.2.0: Student-T density more robust for very large degrees of freedom Sparse Kronecker product much more efficient (now leverages sparsity) Direct access to raw matrix storage implementations for advanced extensibility Now also separate package for signed core library with a strong name (we dropped strong names in v2.2.0) Also available as NuGet packages...New ProjectsAction Bar: Action Bar is a SNS network based on activities.async/await C# Samples: Project demonstrating new C# feature - async and await. You can find here several solutions to make UI calls asynchronous: APM, EAP and async.Attribute Based Xaml Generator: Dynamic Xaml UI Generator and Editor Just point it to a dll or an exe and then navigate through your namespaces to your classB INI Sharp Library: Full support for INI files.brevis nopCommerce Extensions: Extensions for nopCommerce open soruce e-commerce solution (several Versions). !Contents nop 1.90 fpr testing the new Lib! This will be removed after 1. releaseConEmu - Windows console with tabs: ConEmu (short for Console Emulator) is a console window and tabbed environment for Windows. Tabs, Fonts, Quake style, Transparency and hundreds of other optionsContrib.Mod.AccountWidgets: Orchard module for adding login and registration widgetsCSharp GUI for Mono: This is an application which makes use of "Mono" to execute CSharp programs. It provides a graphical user interface to run the CSharp program. DocCollection: ???????????????http://www.qlili.comfanpages: Fanatics!ISIS Associations Manager: Application Web permettant la gestion d'Associations. (Membres, Emailing, Calendier)LogMan: ????????????b/s??,??python?? require: web.pyLucifure Stash - Azure Table Storage Client: Lucifure Stash is an alternate Azure table storage client, which supports arrays, enumerations, large data > 64KB, serialization, morphing and more.Mod.EverlastingLogin: Orchard module to allow a user to stay logged in for a certain amount of time using cookiesPHP Extra Functions: PHP Extra Functions is a suite of functions that extend common libraries with easy to use functions. For example, functions are added to MySQLi to simplify use.Raise events controlled: This is an example of raising you events controlled (with exception handling)sb0t v.5: sb0t 5 development page.SharePoint Mobile OA Platform: Via mobile device, by using the SharePoint Mobile Support, Web Service, Client OM, WCF Data Service bring about mobile office.Simple Guestbook: I just want to share simple code, may be will be helpful for newbies.SimplyWeather2.gadget: A neat little weather gadget for your Windows Desktop.Tanks: Required summary is hereUtility Project: Utilities ProjectWindows Phone: The goal of this project is to improve my skills in Windows Phonewords: ?????????Wpf Testing Lib: This is a project for auto testing wpf appswtstudy: wtstudy

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  • httpd.conf variables : What is the difference between ${var} and %{var}?

    - by 108.im
    What is the difference between ${var} and %{var} in httpd.conf? How and when would one use ${} and %{}? http://httpd.apache.org/docs/2.4/configuring.html mentions : The values of variables defined with the Define of or shell environment variables can be used in configuration file lines using the syntax ${VAR}. http://httpd.apache.org/docs/2.4/mod/mod_rewrite.html mentions: Server-Variables:These are variables of the form %{ NAME_OF_VARIABLE } and RewriteMap expansions:These are expansions of the form ${mapname:key|default}. Will ${VAR} be used everywhere in httpd.conf, except in mod_rewrite directive's (like RewriteCond, RewriteRule but except for RewriteMap expansions which use ${} as in RewriteRule ^/ex/(.*) ${examplemap:$1} ) Would a variable set in httpd.conf using SetEnvIf Directive, for use in same httpd.conf, be used as ${var} except when the variable is used with mod_rewrite directive's, where the variable would be used as %{var}?

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  • Options to optimize lotus notes 8.5.X

    - by Jakub
    Has anyone found actually useful optimization methods for the bulky, fat, eclipse giant, nuissance that is Lotus Notes 8.5? I want it to be fast, and not eat up system resources like crazy while I run it ALL day (as it is my company's corporate mail / cal / scheduling solution). I've tried various hacks for the JVM heap size (if I recall correctly). None really bring a performance improvement. I have a dual core cpu, if that helps (I tried going the route of optimizing JAVA for 2 cores in hopes it would work, but seen no speed improvement). Notes is just sooo bloated, anyone have any suggestions to optimize/mod this thing so it is more responsive and less of a resource hog. Note: I don't want to switch to the web version, or the standard stripped down versions, I am aware of those, I just cannot since we don't run those internally for the company.

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  • Trouble with cross network permissions for an image through iis7 in an asp.net virtual directory

    - by EdenMachine
    I have load balanced web servers My web application has a function that allows the user to upload their company logo to display in the application header obviously, when they upload the logo image file, it needs to be in a central location or otherwise, the file will not be accessible to the other server on the load balancer. in order to be able to upload the image through the application other on one of either servers and then display it on both servers I need a virtual directory in IIS on both servers that point to a third "file server" (this is the "AcctData" directory shown below with a sub folder "images") the problem is that no matter what I do, I run into a permissioning issue If I use pass-through authentication I get a 401 error. If I use a specific user that's set up on both boxes, I get a 500 error. The "Default" application under "CP" (shown in the image below) uses an AppPool that is a Domain Account that has admin permissions on all the servers. I've also tried sticking a Web.config file in the "AcctData" directory allowing anonymous access. Nothing is working though.

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  • Cache Busting and Include Files for Nginx

    - by Vince Kronlein
    In Apache you can use the following to cache bust css and js files and server them as a single file with Apache's Include mod: <FilesMatch "\.combined\.js$"> Options +Includes AddOutputFilterByType INCLUDES application/javascript application/json SetOutputFilter INCLUDES </FilesMatch> <FilesMatch "\.combined\.css$"> Options +Includes AddOutputFilterByType INCLUDES text/css SetOutputFilter INCLUDES </FilesMatch> <IfModule mod_rewrite.c> RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule ^(.+)\.(\d+)\.(js|css|png|jpg|gif)$ $1.$3 [L] </IfModule> I know this is possible with nginx but I can't seem to get the syntax correct. -- EDIT -- Adding some code The only piece I have thus far is: location ~* (.+)\.(?:\d+)\.(js|css)$ { ssi on; try_files $uri $1.$2; } What I'm looking for is to be able to combine all js and css files into single files using the combined keyword with a number for cache busting: style.combined.100.css javascript.combined.100.js

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  • Upgrade PHP to 5.3 in Ubuntu Server 8.04 with Plesk 9.5

    - by alcuadrado
    I have a dedicated server with Ubuntu 8.04, and really need to upgrade php to 5.3 version in order to deploy a new version of the system. This version of php is the default one in ubuntu 10.04, so I considered upgrading the OS, but after trying that, I lost my plesk installation, which annoyed my client. I tried adding the dotdeb.org repositories, but don't know why, after running an apt-get upgrade, I get this error: # apt-get upgrade Reading package lists... Done Building dependency tree Reading state information... Done The following packages have been kept back: libapache2-mod-php5 php5 php5-cgi php5-cli php5-common php5-curl php5-gd php5-imap php5-mysql php5-sqlite php5-xsl 0 upgraded, 0 newly installed, 0 to remove and 11 not upgraded. Any idea why is this happenning? Or do you know any alternative method (except compiling my own binaries) to upgrade php or update ubuntu without loosing plesk? Thanks!

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  • Problem to install Apache 2.4.2 in Ubuntu 12.04

    - by Michael
    I followed these steps to install Apache 2.4.2 in Ubuntu 12.04, but it seems Apache is not installed, here's what I did (I followed the steps in this site http://www.discusswire.com/apache-2-4-installation-ubuntu/): sudo apt-get install build-essential sudo apt-get build-dep apache2 wget http://apache.mirrors.pair.com/httpd/httpd-2.4.2.tar.gz tar -xzvf httpd-2.4.2.tar.gz && cd httpd-2.4.2 sudo ./configure --prefix=/usr/local/apache2 --enable-mods-shared=all --enable-deflate --enable-proxy --enable-proxy-balancer --enable-proxy-http --with-mpm=prefork sudo make sudo make install when I tried to start by issuing sudo /usr/local/apache2/bin/apachectl start at terminal, I got the following warning: "AH00558: httpd: Could not reliably determine the server's fully qualified domain name, using 127.0.1.1. Set the 'ServerName' directive globally to suppress this message" and when I typed top at terminal, the apache is not there. I also tried to go to http://localhost/ or 127.0.0.1 or even 127.0.1.1 it showed "Can't establish connection to server ..." message. ps: I checked the error log and it showed "[Fri Jul 27 15:49:00.703901 2012] [proxy_balancer:emerg] [pid 20781] AH01177: Failed to lookup provider 'shm' for 'slotmem': is mod_slotmem_shm loaded?? [Fri Jul 27 15:49:00.704083 2012] [:emerg] [pid 20781] AH00020: Configuration Failed, exiting" What I'm missing? Thanks Michael

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  • Can someone recommend a Compact Flash card to be used as a boot disk

    - by Hamish Downer
    I have an early Acer Aspire One netbook, and the flash drive is really slow at writing. I've taken it apart to add more RAM, but I've pretty much stopped using it. I've read about people replacing the SSD with a Compact Flash card and a CF to ZIF adapter but I've also read about some Compact Flash cards where the manufacturer has permanently disabled the boot flag to stop people doing this kind of mod. (Can't find the link any more though). So my most specific question is: can someone recommend a compact flash card that does allow the boot flag to be set? Please say whether you've done it yourself, or just heard about it from someone else. Beyond that, is this generally a problem?

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  • Minecraft-style player-gound collision detection

    - by khyperia
    The title pretty much says it all... (Minecraft is a game consisting of evenly-spaced cubes for terrain, like voxels) Note: I am using C# XNA. I am pretty sure AABB is the way to go, yet I don't know how to implement it. I admit, I'm almost looking for code, but theories/ideas are very welcome. Important capabilities of my code: I have a function that can get a block anywhere in the world, and get a BoundingBox for that cube. Hence, I have created a BoundingBox for the player to collide with those cubes. My idea was to get the blocks around the player (maybe 4x6x4) and test against those. The problems I have been having: Say the world is a flat plane. If I use the method of go the shortest distance out, then if the player is slightly clipped into the ground (from gravity), but even slighter into the next block over, then the player will be pushed sideways (and so cannot walk along ground). Of course, this is assuming I react to every block intersected. Another problem is knowing which direction to go (aka negative x or positive). That takes me to my final problem- Getting the amount of intersection, in the correct direction (+ or -) has been tough for me. I hope I haven't been too hard to understand, I'm not too good at explaining things... And if this question has already been asked, I'm sorry, I looked for it... for 3 days straight. One last thing, if someone knows exactly how minecraft does it, or has source (I know MC modders have the source, how else would they mod), please point me to it.

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  • Do you play Sudoku ?

    - by Gilles Haro
    Did you know that 11gR2 database could solve a Sudoku puzzle with a single query and, most of the time, and this in less than a second ? The following query shows you how ! Simply pass a flattened Sudoku grid to it a get the result instantaneously ! col "Solution" format a9 col "Problem" format a9 with Iteration( initialSudoku, Step, EmptyPosition ) as ( select initialSudoku, InitialSudoku, instr( InitialSudoku, '-' )        from ( select '--64----2--7-35--1--58-----27---3--4---------4--2---96-----27--7--58-6--3----18--' InitialSudoku from dual )    union all    select initialSudoku        , substr( Step, 1, EmptyPosition - 1 ) || OneDigit || substr( Step, EmptyPosition + 1 )         , instr( Step, '-', EmptyPosition + 1 )      from Iteration         , ( select to_char( rownum ) OneDigit from dual connect by rownum <= 9 ) OneDigit     where EmptyPosition > 0       and not exists          ( select null              from ( select rownum IsPossible from dual connect by rownum <= 9 )             where OneDigit = substr( Step, trunc( ( EmptyPosition - 1 ) / 9 ) * 9 + IsPossible, 1 )   -- One line must contain the 1-9 digits                or OneDigit = substr( Step, mod( EmptyPosition - 1, 9 ) - 8 + IsPossible * 9, 1 )      -- One row must contain the 1-9 digits                or OneDigit = substr( Step, mod( trunc( ( EmptyPosition - 1 ) / 3 ), 3 ) * 3           -- One square must contain the 1-9 digits                            + trunc( ( EmptyPosition - 1 ) / 27 ) * 27 + IsPossible                            + trunc( ( IsPossible - 1 ) / 3 ) * 6 , 1 )          ) ) select initialSudoku "Problem", Step "Solution"    from Iteration  where EmptyPosition = 0 ;   The Magic thing behind this is called Recursive Subquery Factoring. The Oracle documentation gives the following definition: If a subquery_factoring_clause refers to its own query_name in the subquery that defines it, then the subquery_factoring_clause is said to be recursive. A recursive subquery_factoring_clause must contain two query blocks: the first is the anchor member and the second is the recursive member. The anchor member must appear before the recursive member, and it cannot reference query_name. The anchor member can be composed of one or more query blocks combined by the set operators: UNION ALL, UNION, INTERSECT or MINUS. The recursive member must follow the anchor member and must reference query_name exactly once. You must combine the recursive member with the anchor member using the UNION ALL set operator. This new feature is a replacement of this old Hierarchical Query feature that exists in Oracle since the days of Aladdin (well, at least, release 2 of the database in 1977). Everyone remembers the old syntax : select empno, ename, job, mgr, level      from   emp      start with mgr is null      connect by prior empno = mgr; that could/should be rewritten (but not as often as it should) as withT_Emp (empno, name, level) as        ( select empno, ename, job, mgr, level             from   emp             start with mgr is null             connect by prior empno = mgr        ) select * from   T_Emp; which uses the "with" syntax, whose main advantage is to clarify the readability of the query. Although very efficient, this syntax had the disadvantage of being a Non-Ansi Sql Syntax. Ansi-Sql version of Hierarchical Query is called Recursive Subquery Factoring. As of 11gR2, Oracle got compliant with Ansi Sql and introduced Recursive Subquery Factoring. It is basically an extension of the "With" clause that enables recursion. Now, the new syntax for the query would be with T_Emp (empno, name, job, mgr, hierlevel) as       ( select E.empno, E.ename, E.job, E.mgr, 1 from emp E where E.mgr is null         union all         select E.empno, E.ename, E.job, E.mgr, T.hierlevel + 1from emp E                                                                                                            join T_Emp T on ( E.mgr = T.empno ) ) select * from   T_Emp; The anchor member is a replacement for the "start with" The recursive member is processed through iterations. It joins the Source table (EMP) with the result from the Recursive Query itself (T_Emp) Each iteration works with the results of all its preceding iterations.     Iteration 1 works on the results of the first query     Iteration 2 works on the results of Iteration 1 and first query     Iteration 3 works on the results of Iteration 1, Iteration 2 and first query. So, knowing that, the Sudoku query it self-explaining; The anchor member contains the "Problem" : The Initial Sudoku and the Position of the first "hole" in the grid. The recursive member tries to replace the considered hole with any of the 9 digit that would satisfy the 3 rules of sudoku Recursion progress through the grid until it is complete.   Another example :  Fibonaccy Numbers :  un = (un-1) + (un-2) with Fib (u1, u2, depth) as   (select 1, 1, 1 from dual    union all    select u1+u2, u1, depth+1 from Fib where depth<10) select u1 from Fib; Conclusion Oracle brings here a new feature (which, to be honest, already existed on other concurrent systems) and extends the power of the database to new boundaries. It’s now up to developers to try and test it and find more useful application than solving puzzles… But still, solving a Sudoku in less time it takes to say it remains impressive… Interesting links: You might be interested by the following links which cover different aspects of this feature Oracle Documentation Lucas Jellema 's Blog Fibonaci Numbers

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  • Apache 2: SetEnvIf "IP Range"

    - by BlaM
    In my Apache config I want to set an environment variable if I see that the visitor comes from an specific IP range. Currently I do it this way: SetEnvIfNoCase Remote_Addr "^194\.8\.7[45]\." banned=spammer-ip SetEnvIfNoCase Remote_Addr "^212\.156\.170\." banned=spammer-ip What I would prefer is something like this: SetEnvIfIpRange 194.8.74.0/23 banned=spammer-ip SetEnvIfIpRange 212.156.170.0/24 banned=spammer-ip ... because I think that converting an IP address to a string and then do an regular expression is a total waste of ressources. I could do an Deny From 194.8.74.0/23 ... but then I don't get a variable that I can check in my 403 error page - to find the reason why access has been denied. Any suggestions what I might miss? Is there an Apache2 MOD that can set environment variables based on "IP Address Ranges"?

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  • Keep-Alive header not sent from Tomcat 5.5 http connector?

    - by Codek
    Hi, We're currently using a hardware load balancer, which then goes to Apache and that then goes to Tomcat 5.5 via the AJP connector. We've decided to dump apache for various reasons - In our current system it doesnt provide any advantage. However when I look at the headers sent when we do this, the "Keep-Alive: timeout=15 max=96" header doesnt get sent when you use the tomcat http connector Interestingly, i can find no documentiation on "keepalivetimeout" for tomcat5.5, but i can for tomcat6. But neither can i find evidence that tomcat5.5 doesnt support this setting. here's my connector: <Connector port="8090" maxHttpHeaderSize="8192" maxThreads="400" minSpareThreads="150" maxSpareThreads="300" enableLookups="false" connectionTimeout="2" maxKeepAliveRequests="400" disableUploadTimeout="true" /> So; Is there any way I can specify the keepalive timeout if we use the http connector with tomcat 5.5, and force this header entry to be sent? Thanks, Dan

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  • Why are SW engineering interviews disproportionately difficult?

    - by stackoverflowuser2010
    First, some background on me. I have a PhD in CS and have had jobs both as a software engineer and as an R&D research scientist, both at Very Large Corporations You Know Very Well. I recently changed jobs and interviewed for both types of jobs (as I have done in the past). My observation: SW engineer job interviews are way, way disproportionately more difficult than CS researcher job interviews, but the researcher job is higher paying, more competitive, more rewarding, more interesting, and has a higher upside. Here's a typical interview loop for researcher: Phone interview to see if my research is in alignment with the lab's researcher In-person, give presentation on my recent research for one hour (which represents maybe 9 month's worth of work), answer questions In-person one-on-one interviews with about 5 researchers, where they ask me very reasonable questions on my work/publications/patents, including: technical questions, where my work fits into related work, and how I can extend my work to new areas Here's a typical interview loop for SW engineer: Phone interview where I'm asked algorithm questions and maybe do some coding. Pretty standard. In-person interviews at the whiteboard where they drill the F*** out of you on esoteric C++ minutia (e.g. how does a polymorphic virtual function call work), algorithms (make all-pairs-shortest-path algorithm work for 1B vertices), system design (design a database load balancer), etc. This goes on for six or seven interviews. Ridiculous. Why would anyone be willing to put up with this? What is the point of asking about C++ trivia or writing code to prove yourself? Why not make the SE interview more like the researcher interview where you give a talk about what you've done? How are technical job interviews for other fields, like physics, chemistry, civil engineering, mechanical engineering?

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  • Dependencies lib32asound2 [duplicate]

    - by The Mini John
    This question already has an answer here: 'teamviewer depends on (…)' while trying to install TeamViewer 4 answers I was trying to install Teamviewer, but i was getting a dependencies error. I tried to install them but with no luck.. I think Mod's are not reading the questions trough when they mark as duplicate I'm getting this Error: Unpacking teamviewer (from teamviewer_linux_x64.deb) ... dpkg: dependency problems prevent configuration of teamviewer: teamviewer depends on lib32asound2; however: Package lib32asound2 is not installed. teamviewer depends on lib32z1; however: Package lib32z1 is not installed. teamviewer depends on ia32-libs; however: Package ia32-libs is not installed. dpkg: error processing teamviewer (--install): dependency problems - leaving unconfigured Errors were encountered while processing: teamviewer I tried sudo apt-get -f install but getting Package ia32-libs is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source However the following packages replace it: lib32z1 lib32ncurses5 lib32bz2-1.0 Package lib32asound2 is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source E: Package 'lib32asound2' has no installation candidate E: Package 'ia32-libs' has no installation candidate i cant even get to the sudo dpkg -i teamviewer_linux_x64.deb If i force installation sudo dpkg --force-depends -i teamviewer_linux_x64.deb Although it's "Setting up Temviewer" it gives me this I'm fairly new to ubuntu, can anyone help me out ? I'm on Ubuntu 13.10

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  • Can someone recommend a Compact Flash card to be used as a boot disk/fixed disk.

    - by Hamish Downer
    I have an early Acer Aspire One netbook, and the flash drive is really slow at writing. I've taken it apart to add more RAM, but I've pretty much stopped using it. I've read about people replacing the SSD with a Compact Flash card and a CF to ZIF adapter but I've also read about some Compact Flash cards where the manufacturer has permanently disabled the boot flag to stop people doing this kind of mod. (Can't find the link any more though). (Although I have just found some info about CF cards that says "Most CompactFlash cards by default identify themselves as removable media instead of fixed disk" and that this is an issue for Windows. So my most specific question is: can someone recommend a compact flash card that does allow the boot flag to be set and to be set as Fixed Disk? Please say whether you've done it yourself, or just heard about it from someone else. Beyond that, is this generally a problem?

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