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• Nginx vs Apache as reverse proxy, which one to choose

  - by mhd

  Hi, this kind of question maybe has been asked here but I couldn't find any that really match my question. Heard that nginx performance is quite impressive, but Apache has more docs, community(read:expert) to get help Now what I want to know, how both web servers compare in term of performance, easiness of config, level of customization,etc. AS REVERSE PROXY server in a vps environment?? I'm still weighing between the two for a ruby web app(not ROR) served with thin server. Specific answer will be much appreciated. General answer not touching the ruby part is okay. I'm still noob in web server administration.

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• Thin web server - single or multiple instances per IP address:port?

  - by wchrisjohnson

  I'm deploying a rack/sinatra/web socket app onto several servers and will use thin as the web server (http://code.macournoyer.com/thin/). There are almost no views to show, so I am not front-ending it with a traditional web server like Apache or nginx. In general, you see thin started and the underlying config file for it has the number of server instances to start, say 3, and the port to start with, say 5000. So, in my example, when thin starts, it starts up three instances on a range of ports, starting on port 5000. If I have a series of virtual machines, say 3, 6, 9, etc. that I treat as a cluster, would/should I choose to start a single thin instance on each VM, or multiple instances on each VM? Why? Thanks - Chris

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• Weird RAM Upgrade Experience

  - by Axel Isouard

  I have a laptop, HP EliteBook 8540p having originally 4GB RAM and I've recently bought Corsair Value Select SO-DIMM 16 Go (2x 8 Go) DDR3 1333 MHz. It fits the required RAM specifications perfectly, and once I've inserted them, the BIOS recognizes the memory correctly, but my linux Gentoo running on kernel 3.1.6 SMP x86_64 crashes immediately when I'm running an app which consumes a lot of memory. The laptop crashes as if there's no more battery left, when the memory reaches at least 6000MB ram. Windows 7 doesn't want to run anymore, it shows a blue screen with the IRQ LESS OR EQUAL error if I set 8GB, and it doesn't boot at all if I set 16GB. Is there something I could do to fix this please ?

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• Common filesystem for servers behind a rackspace load balancer

  - by thanos panousis

  Our PHP application consists of a single web server that will receive files from clients and perform a CPU-intensive analysis on them. Right now, analysis of a single user upload can take 3sec to conclude and take 100% CPU. This makes our system capacity amount to 1/3 requests per second. My team's requirement is to increase capacity without a lot of code reengineering. A possible solution would be to set up a load balancer in front of multiple servers running the same app, connecting to a common DB. The problem is that the analysis outputs files on disk. A load balancer would increase capacity, but then files won't be available between servers so consequent client requests may fail. We are hosted on Rackspace, is there a way to configure some sort of "common" storage for all servers, without having to rewrite our file persistance code? Current code relies on simple fopens etc. What are our options?

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• Ubuntu+Mono+Postgres+ASP.NET 4.0. No problem?

  - by wreck_of_u

  Would this be ok? I'm an ASP.NET developer and I'm planning to build "portable" web app servers based on Atom D510 mini-ITX. I have ran Ubuntu 10 with MySQL along with a separate IIS machines (win 2k3, 2k8) before with no problems. But now I'm thinking of "packaging" a web/db server into one small, cheap machine. I thought of Ubuntu/Mono/Postgres/ASP.NET, that it would be a good idea but I'm not sure? I have not actually tried it yet. Your thoughts?

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• Can a working Tomcat 6 webapp be turned into a usable .war file?

  - by Bill Cole

  Problem: I have a working webapp on a FreeBSD 8.1 Tomcat 6 test server that I need to move to a production system. The developer who last touched it (and had root on that server) has moved on and isn't helpful. The running app seems to have been deployed from a CVS server that is now unavailable. My thinking is that I would like to find a way to wrap the working webapp into a proper .war so that I can deploy it on a pristine host and (after testing) send the existing system to a very deep bitbucket. But I'm not having luck finding a way to do that. I'm a sysadmin not a developer and don't work much with Tomcat systems so I may be (likely am) overlooking something blindingly simple. I gather that I may be able to just tar up the deployed directory and untar it on the new machine, but I have a nagging feeling that there are pitfalls in that.

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• Can you link to a good MySQL dumper PHP script?

  - by Ivan

  I need to migrate a website to another host. I have only FTP server access and MySQL name+pass (the MySQL server's IP I was provided is 127.0.0.1, and there's neither PhpMyAdmin nor SSHell to use). A web app run there can access the DB using credentials I know and localhost server. So I'd need a PHP script, that will correctly dump all the available databases of the MySQL server so that they can be imported on the new server. Can you recommend a good one?

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• 2D animations for Android, IOS, web

  - by David Phillips

  Working on Windows 7 platform, I'm interested in creating an app that could run on Android devices (phone or tablet), IOS devices (iPhone, iPad), and the web. First target would be Android. Do you remember those old Arthur Murray footstep diagrams to teach dancing? I want to do the same thing, but animate the steps, so the user can play them all, as well as step forward or backward thru them at their own pace. Perhaps one could generate an animated GIF and then play it on the platform. So there would seem to be two parts to this: 1) A good way to generate the animation images. I can, for example, see using SketchUp - something I know - for this. But is there something better it would be worth investing in? And, 2) How to play the result, including options for playback speed control, and even forward/backward stepping? Ideally a single, or easily adaptable player to the three different OS platforms.

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• Symfony sfControlPanel 500 error only when executing 'tasks'

  - by rrlange

  As a bit of background, I recently had to restore a Symfony site from backup. Ever since the 'successful' restore, I am running into an exception when trying to execute a(ny) task via the web-based sfControlPanel: Unable to find PHP executable stack trace * at sfToolkit::getPhpCli() in SF_ROOT_DIR/plugins/sfControlPanelPlugin/modules/sfControlPanel/actions/actions.class.php line 93 FYI: symfony version 1.0.6 PHP 5.2.6 (cli) (built: May 2 2008 16:06:40) Apache/2.2.3 CentOS 5.* Thank you very much for any and all suggestions as to what might be amiss. Addendum: I neglected to mention that I can the frontend app (and certain backend apps) perfectly fine via the web. I am also able to run common tasks via the command line (cc etc.).

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• How to connect 2 virtual hosts running on the same machine?

  - by Gabrielle

  I have 2 virtual hosts running on my Windows XP laptop. One is Ubuntu running inside vmware player. The other is MS virtual PC (so I can test with IE6 ). The Ubuntu virtual host is running my web application with apache. I can point my browser on my laptop at the Ubuntu IP and view my web app. I read this post http://stackoverflow.com/questions/197792/how-to-connect-to-host-machine-from-within-virtual-pc-image and was able to get my Virtual PC to ping my physical machine using the loopback adapter. But I'm stuck on getting my Virtual PC to see my web application running in the Ubuntu vmware player host. I appreciate any suggestions.

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• Lost icons (firefox,notepadpp,fzilla) on Windows 7

  - by Shiki

  Okay the deal is simple. I lost the icons and see that white icon instead of them in the taskbar which is really annoying. Tried reinstalling Firefox, no use. (Tried checking the firefox icon in the app folder (program files), but same situation there, no icon). OS: Windows 7 x64 up-to-date, every update installed (Maybe related: I installed my PC with a wrong account name. Renamed it. That rename caused much headache since Windows messes with my user folder, bla bla. Now I made a new user, called "S" and I'm using this ever since that incident.)

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• Smart backup software

  - by gisek

  I use a laptop on daily basis. As I have a lot of important data there it would be nice to do backups of some directories every day. Can you recommend a specific application that would take care of it? Maybe there is an app that would instantly commit changes I make in a directory on my laptop to the backup folder? The important thing is that I have some big files (a few GB's) that have some minor changes very often. I'm talking about VirtualBox disk images. It would be nice if the software could handle it smartly. Also notice that I'd like to store it on an external usb HDD, which sometimes isn't plugged in.

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• How to delete vssver2.scc and global.asax from my Windows Server?

  - by rlb.usa

  I have a Windows server that I SFTP into, and I have some very old vssver2.scc files on there. They are used by Visual Source Safe- which is no longer used (SVN instead now). I want to delete them. Most troubling though is a very old global.asax file used by ASP.NET applications - since the app is compiled, it reads from it's global.dll in the Bin folder, and not the global.asax. I want to get rid of it. But I can't - and I can't overwrite it in favor of a newer one either. These files have 444 (Owner:r Group:r Public:r) permission and when I try to give them 777 (O:rwx G:rwx P:rwx) permission hoping it will let me delete them, it goes back to 444.

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• automated printouts from a wireless printer

  - by Piotr

  I have a wireless printer which is always on, and an always on fanless linux server. Looking at the mprinter project on Kickstarter I started to wonder if there is an app somewhere in the internet already that will allow to prepare an automated daily printout based on some settings. things to be printed could include - weather forecast for my locations, todo`s scheduled for that day, a "quote of a day" or "word of the day", stats from google analytics for my site, and many more ... I would set a printout at 6:15 every work day so its on my printer when I am already up, having a coffee. anyone knows something that can be used for such purpose? While I know this can be done by combining the power of TeX, cron and a script language to manage the dynamic part of the PDF I believe this is a use case someone has already addressed.

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• Cannot connect to HTTPS port on Ubuntu

  - by Simpleton

  I've installed a new SSL certificate and set up Nginx to use it. But requests time out when trying to hit HTTPS on the site. When I telnet to my domain on port 80 it connects, but times out on port 443. I'm not sure if there's some defaults on Ubuntu preventing a connection. UFW status shows: 443 ALLOW Anywhere netstat -a shows: tcp 0 0 *:https *:* LISTEN nmap localhost shows: 443/tcp open https The relevant block in the Nginx config is: server { listen 443; listen [::]:80 ipv6only=on; listen 80; root /path/to/app; server_name mydomain.com ssl on; ssl_certificate /etc/nginx/ssl/ssl-bundle.crt; ssl_certificate_key /etc/nginx/ssl/server.key; location / { proxy_pass http://mydomain.com; proxy_set_header Host $host; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; } }

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• Can't run .net software on Samsung Omnia Pro B7330

  - by Sam

  I've got a Samsung Omnia Pro B7330, and am unable to run any program for .net compact framework on it. My last three Smartphones had been HTC brand, and all the programs I tried are just simple winform apps, which ran on all HTC phones. But not on the Omnia. Whenever I try to start an app, I get an "unexpected error" / "NotSupportedException" at: Microsoft.AGL.Common.MISC.HandleArt() System.Windows.Forms.Control._InitInstalce() System.Windows.Forms.Control..ctor() System.Windows.Forms.Button..ctor() MyApp.InitializeComponents() The proper compact framework 2.0 is already installed in the rom, installing CF 3.5 didn't change anything. Anyone can tell me whats the problem with this phone?

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• How to bypass Forefront TMG for downloading from Adobe Cloud

  - by user1006272

  I hope that this question has not been asked as I've spent a couple of days googling around trying to find a solution. I have one computer that needs to download from Adobe Cloud to install applications like Photoshop etc... The issue I'm having is that Adobe uses a download manager program (AdobeApplicationManager.exe) that just keeps incrementing the time left on the download of any app like Photoshop. Is there a way to allow just the download manager from that one computer to bypass any filtering settings in Forefront TMG 2010? I have very little knowledge of servers / ISA servers / Forefront TMG and have been thrown into this position by luck I guess. Any help with this would be highly appreciated. Thanks in advance.

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• Free duplicate music finder for Mac.

  - by Jack M.

  I'm trying to clean up an mp3 folder which has a plethora of duplicate files in it due to accidentally dragging my music folder into iTunes and having it re-import songs which were already in the play list. I tried writing a quick Python app to md5 all of the files, and delete exact duplicates. This took out ~2gb of files. Unfortunately, however, this does not work on all of the duplicates because of an iTunes feature. iTunes has changed the ID3 title on some of the duplicate songs, which means the md5 of the entire file is different from the same song with a different ID3 tag. Are there any free applications out there (for the mac) which can compare the data of the actual song (ignoring ID3 tags) and determine if duplicates exist?

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• best way to record local modifications to an application's configuration files

  - by Menelaos Perdikeas

  I often install applications in Linux which don't come in package form but rather one just downloads a tarball, unpacks it, and runs the app out of the exploded folder. To adjust the application to my environment I need to modify the default configuration files, perhaps add an odd script of my own and I would like to have a way to record all these modifications automatically so I can apply them to another environment. Clearly, the modifications can not be reproduced verbatim as things like IP addresses or username need to change from system to system; still an exhaustive record to what was changed and added would be useful. My solution is to use a pattern involving git. Basically after I explode the tarball I do a git init and an initial commit and then I can save to a file the output of git diff and a cat of all files appearing as new in the git status -s. But I am sure there are more efficient ways. ???

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• Multi-account Google Apps Calendar Free-busy status?

  - by Andrew Bolster

  I have 3 google apps domain accounts and a personal google account, and until recently, there was little need for the google app's calendars to have any real use; Now however the powers that be finally discovered the smart re-scheduler and the other google tools for managing meetings and schedules; unfortunately I'm now in a position where I've got events notifications all over the place and because each of the calendars do not know about each other, I'm losing all of the advantages of rescheduler / free-busy status. TL;DR, 4 calendars, unified 'free busy' status without having to manually copy every event please.

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• What is an Acer Converter Port?

  - by ShadowHero

  What is this port "Acer Converter Port"? Very little information can be found on the internet. It's basically the same as miniDP? Can I connect a monitor like Dell U2713H on this one? EDIT From this page: http://acer.custhelp.com/app/answers/detail/a_id/30837/~/frequently-asked-questions-on-the-aspire-r7-series 9. Can I connect a DisplayPort monitor to the Acer Converter Port? The Acer Converter Port uses the same physical port as a Mini DisplayPort, but is designed to connect to an Acer proprietary cable. If you connect a DisplayPort monitor, Acer cannot guarantee the functionality of the monitor. No damage should occur to either monitor or notebook by connecting a Mini DisplayPort cable. So, the question is, can someone confirm this will work for sure?

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• Setting up an SVN repository on a windows server to work with XCode.

  - by Tejaswi Yerukalapudi

  Hi, I need to setup an SVN repository for an iPhone / iPad app that I'm working on. It needs to be setup on a Windows server 2003 instance. We run VSS on it, but it doesn't really work all that well with XCode, so I'd like to migrate ASAP. The problem is, I'm a new graduate and this is the first time I'll be using a souce control software, so any tutorials on how to set one up, configure it to work correctly with Macs using XCode are greatly appreciated! Though it's not a priority, I'd also like to try to get my company to ditch VSS for SVN (Been reading this article yesterday - http://www.codinghorror.com/blog/2006/08/source-control-anything-but-sourcesafe.html). How hard is it to migrate existing builds in VSS into something like SVN? Thanks, Teja

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• Where should my application setup put the binary executables in Windows 7?

  - by KeyboardMonkey

  I created a small Windows app, and am builder a setup for it using NSIS, but what I can't find out is where to put the executables to conform to the new Windows security model. Traditionally we put program files in, well, "c:\program files". With the security model getting more mangled with each Windows version, some users have restricted accounts, and I'm not sure installing into program files will work for these users. Where can I install my program's files that will cater for these lower-privileged users? Oh and I want to avoid ClickOnce.

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• How do I execute a script or program on Windows Shut Down

  - by Subhen

  I want to run a exe or bat file when window shut down? I want to unmount few drives , which are mounted by my application , when user shutdown the system. For that I need to execute another exe on shutdown, which will disconnect drives mounted by my app. I got few links which shows we can create a entry in Group Policy to execute a programe while window shut down. I am not sure how I can add a entry to Group ploicy by C++ code. Again , group policy doesn't work with Win Vista. Any other better approach ?

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• Subscribe to feed in Thunderbird from the command line?

  - by Coderer

  From reading around the web, it looks like Firefox's "quick view" of an RSS feed sometimes lets you "Subscribe to this feed using" Thunderbird. For whatever reason, that's not an automatically-added option with my setup (FF 3.5.something + Thunderbird 3.0.something on Linux), so I figured I could just "Choose Application...", point at the Thunderbird binary, and be on my way. Not so -- nothing appears to happen. If I run thunderbird from the command line as thunderbird "http://path/to/feed" the app launches as normal. If it's already running, absolutely nothing happens. Is this impossible? Is there some mojo I can pass Firefox to tell it that Thunderbird exists? Should I just suck it up and copy/paste the URLs manually?

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