CentOS

Install Union Development Platform

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Union is a development platform for creating multiuser applications which runs in a central location on the Internet or a LAN. Users need to connect to Union server then users are in constant real-time contact or session. Users can send messages to/from Union Server. Application may be chat, game, shared document, widget on web page. … Read more

Install Etherpad on SUSE Linux

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Collaborate on documents in really real-time on SUSE Linux EtherPad is the first web-based word processor that allows people to work together in really real-time. All editing of the document is instantly visible on the screens of all participating users, enabling new and productive ways to collaborate on text documents. Etherpad is useful for meeting … Read more

Red5 figure out audio/video out of sync issue

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I had worked Red5 WebCam application that lets users to record video clips from their webcams. The users could talk while they record clips. I was using PHP with Zend Gdata for uploading recorded video clips to YouTube. But I had issue in FLV files generated by Red5 server, the clip’s audio / video content … Read more

How to prevent downloading and leeching media files

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How Do I Stop Hotlinking, Bandwidth Theft, Downloading and Leeching media files? You can stop downloading / hotlinking / leeching your site’s files using .htaccess in your Apache root or directory. The Apache mod_rewrite must be enabled for this. The 1st line of the above code begins the rewrite. The 2nd line matches any requests … Read more

Emails are not working on server?

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Emails are essential tool / facility on web server to manage all communications among users. Here are few issues: 1. Send mail function is not configured 2. No responsible mail server service on web server 3. Email port blocked 4. SMTP service 5. IP blacklist How to fix: 1. Check Mail server (sendmail or postfix) … Read more

Installing Apache, MySQL, PHP in CentOS 5.5 on Rackspace Cloud

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Most of cloud users prefer Rackspace Cloud for its better service and cost effectiveness… All commands are performed as root to install Apache, MySQL, PHP in CentOS 5.5 Server on Rackspace Cloud. Install Apache # sudo yum install httpd mod_ssl Configure ServerName # sudo /etc/init.d/httpd start Remove Error Starting httpd: httpd: Could not reliably determine … Read more

SaaS built using a PaaS (Google App Engine) and using IaaS (Amazon EC2)

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SaaS = PaaS + IaaS Tools for Development, Testing and Implementation: * Amazon Web Services (AWS) * Google App Engine (GAE) * Google Chart Libraries * Eclipse IDE VaR Cloud Presentation SVNLabs References: Google AppEngine: http://code.google.com/appengine/ Amazon EC2: http://aws.amazon.com/ec2/ Google Chart: http://code.google.com/apis/chart/ “A lamp does not speak. It introduces itself through it’s light. Achievers never … Read more

How to Setup Elastic Load Balancing on AWS

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