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Archive for January, 2014

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Repost: Apple iOS development process using Flash Builder

Repost: Apple iOS development process using Flash Builder

Before developing an iOS application using Flash Builder, it is important to understand the iOS development process and how to obtain the required certificates from Apple.

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Repost: Test and debug a mobile application on a device

Repost: Test and debug a mobile application on a device

You can use Flash Builder to test or debug a mobile application from your development desktop or from a device.

You test and debug applications based on a launch configuration that you define. Flash Builder shares the launch configuration between running and debugging the application. When you use Flash Builder to debug an application on a device, Flash Builder installs a debug version of the application on the device.

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Repost: Desktop video conference preparation: How to calculate bandwidth

Repost: Desktop video conference preparation: How to calculate bandwidth

Video conferencing is a challenging application for business networks. Not only does it require assured bandwidth per call, but it needs very low packet loss ( less than .1% over 5 minutes) and tightly controlled jitter (less than 40 milliseconds). Meeting these requirements on a converged network requires that Quality of Service (QoS) be implemented end-to-end. To prevent the oversubscription of bandwidth, video conferencing also requires either call admission control (CAC) or carefully calculated bandwidth for every call. – Stephen K. Campbell

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Repost: How does Facebook Work?

Repost: How does Facebook Work?

Facebook uses a variety of services, tools, and programming languages to make up its core infrastructure. At the front end, their servers run a LAMP (Linux, Apache, MySQL, and PHP) stack with Memcache.

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Repost: Supermicro IPMI Configuration through BIOS or Web Interface

Repost: Supermicro IPMI Configuration through BIOS or Web Interface

This article will describe the network configuration for full remote management for the Supermicro by means of the BIOS or a web interface. Full remote management includes the Intelligent Platform Management Interface (IPMI), a web interface for maintenance and configuration and Keyboard – Video -Mouse (KVM) over IP.

How to use UNIX/LINUX Shutdown Command?

Shutdown the machine immediately

You can shutdown the machine immediately using the following command. It notifies all the logged in users about the system going down, and shuts down the machine.

# shutdown -h now

Broadcast message from john@example.com
	(/dev/pts/1) at 15:28 ...

The system is going down for halt NOW!

Reboot the machine immediately

You can reboot the machine immediately using the following command. It notifies all the logged in users about the system reboot.

# shutdown -r now

Broadcast message from john@example.com
	(/dev/pts/1) at 15:28 ...

The system is going down for reboot NOW!

How to fix: “Another MySQL daemon already running with the same unix socket.”

You can see this error when restarting MySQL. The system has detected that MySQL is running when it is not. This is probably due to and hard reboot of the system.

To fix this problem, remove the file /var/lib/mysql/mysql.sock as root user:

# rm /var/lib/mysql/mysql.sock

Then start the MySQL daemon:

# service mysqld start

 or

# /etc/init.d/mysqld start

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