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An open-source hardware group on October 2011 announced an $89 credit-card sized motherboard based on an ARM processor that could be used for robotics, gaming and medical devices.

BeagleBoard’s BeagleBone development board is targeted at the open-source hardware community, which includes hobbyists and engineers writing code for hardware with open-source specifications. Some BeagleBoard projects include bringing Linux-based Android and Ubuntu operating systems to its hardware.

The BeagleBone runs a full version of Linux and a full-featured web server, BeagleBoard said in a statement. The board is based on Texas Instruments’ $5 Sitara AM335x ARM Cortex-A8 processor, which can deliver 720MHz of performance. TI announced the processor on Monday.

The board may not be for use in smartphones, tablets or PCs, said Jim McGregor, chief technology strategist at In-Stat. It is mostly for embedded systems running specific applications, and could also be used in audio-visual systems and projectors.

One device developed around the board is the Smart Pill Box, which is a device that lets off an alarm at a specific time to remind Alzheimer’s patients to take medicine.

The open-source boards are cheap to implement, and a lot of development is based on the ARM processor and Linux OS, McGregor said. Decades of development around Linux for open-source hardware has created some easy-to-implement applications for devices.

Despite some experimentation, open-source hardware may not reach smartphones and tablets soon, McGregor said. Hardware requirements for those devices are much more demanding and dynamic, and devices makers prefer to implement their own chip designs. But the possibilities are exciting, and some of the latest chips from companies like Qualcomm include the latest graphics and communication capabilities, McGregor said.

Other open-source projects include OpenCores, which hosts open-source processing cores, the microcontroller-based Arduino, and Bug Labs, which offers hardware for devices such as wireless devices and cameras.

The BeagleBone measures 3.4 inches by 2.1 inches (8.6 centimeters by 5.3 centimeters). It has Gigabit Ethernet, 3D graphics, USB 2.0 and microSD controllers.

This post will cover basic installation and configuration of Oracle 11g Express Edition (XE) on RHEL 5.7

I have installed the RHEL 5.7 (64 bit)using all the development tools and libraries.  Partition is default partition.

Basic installation is straight forward.

Click here for download the Oracle 11g Express Edition. Now oracle releasing the 64 bit version only.

After the download Unzip oracle-xe-11.2.0-1.0.x86_64.rpm.zip.

#unzip oracle-xe-11.2.0-1.0.x86_64.rpm.zip

This will create the directory Disk1. Change to the Disk1 directory:

# cd Disk1

#ls

oracle-xe-11.2.0-1.0.x86_64.rpm  response  upgrade

Install the rpm using rpm -ivh oracle-xe-11.2.0-1.0.x86_64.rpm

#rpm -ivh oracle-xe-11.2.0-1.0.x86_64.rpm  Preparing…                ########################################### [100%]     1:oracle-xe              ########################################### [100%]

Executing post-install steps…

You must run ’/etc/init.d/oracle-xe configure’ as the root user to configure the database.

Configure 11g XE Database and Option

# /etc/init.d/oracle-xe configure

Oracle Database 11g Express Edition Configuration

————————————————-

This will configure on-boot properties of Oracle Database 11g Express  Edition.  The following questions will determine whether the database should  be starting upon system boot, the ports it will use, and the passwords that  will be used for database accounts.  Press <enter> to accept the defaults.

Ctrl-C will abort.

Specify the HTTP port that will be used for Oracle Application Express [8080]: Specify a port that will be used for the database listener [1521]: Specify a password to be used for database accounts.  Note that the same  password will be used for SYS and SYSTEM.  Oracle recommends the use of  different passwords for each database account.  This can be done after

initial configuration:

Confirm the password:

Do you want Oracle Database 11g Express Edition to be started on boot (y/n) [y]:y

Starting Oracle Net Listener…Done

Configuring database…Done

Starting Oracle Database 11g Express Edition instance…Done

Installation completed successfully.</enter>

The installation created the directory /u01 under which Oracle XE is installed.

To set the required Oracle environment variables, use the oracle_env.sh the script included under cd /u01/app/oracle/product/11.2.0/xe/bin

# cd /u01/app/oracle/product/11.2.0/xe/bin
To set the environment for your current session run

#./oracle_env.sh
To set the environment permanently for users, add the following to the .bashrc or .bash_profile of the users you want to access the environment:

#su 0racle

$vim .bash_profile

add the following entries

. /u01/app/oracle/product/11.2.0/xe/bin/oracle_env.sh
You should now be able to access SQL*Plus