Quick guide installing Oracle XE + ruby-oci8 on Ubuntu 10.04
Since installing Oracle XE (stands for eXpress Edition, basically a free edition) on Ubuntu 10.04 Lucid Lynx can be a little hell(read you can spend several hours banging your head against the wall of your choice), I'm writing this quick guide for reference. Bonus for Ruby enthusiasts: we will also install ruby-oci8. Let's start.
Update the system
It's a good habit to update the system before installing anything:
$ sudo aptitude update $ sudo aptitude safe-upgrade
Install Oracle XE
First install two needed libs:
$ sudo aptitude install libaio1 libaio-dev bc
To install Oracle XE you need to add a new repository. Add this line at the end of /etc/apt/sources.list
deb http://oss.oracle.com/debian unstable main non-free
Now, update the system:
$ sudo aptitude update
If you have an error saying that there is a problem with the repository key, do the following instead:
$ wget http://oss.oracle.com/el4/RPM-GPG-KEY-oracle -O- | sudo apt-key add - $ sudo aptitude update
Now, install Oracle XE:
$ sudo aptitude install oracle-xe-universal oracle-xe-client
Configuring Oracle XE
As easy as
$ /etc/init.d/oracle-xe configure
it will ask a password for users SYS and SYSTEM
You can now verify that Oracle XE it's up and running, browsing:
Bonus: installing ruby-oci8
Before anything, you have to set up some environment variables. At the end of your ~/.bashrc file, append:
export PATH=$PATH:/usr/lib/oracle/xe/app/oracle/product/10.2.0/server/bin ORACLE_HOME=/usr/lib/oracle/xe/app/oracle/product/10.2.0/server export ORACLE_HOME export ORACLE_SID=XE LD_LIBRARY_PATH=/usr/lib/oracle/xe/app/oracle/product/10.2.0/server/lib export LD_LIBRARY_PATH
Restart your terminal.
You're good to go:
$ sudo gem install ruby-oci8
If an error occurs about Oracle initialization, there is a good chance that your environment variables are missing. Retry the step above and RESTART your shell.
You can try if the gem is correctly installed using irb:
require 'rubygems' require 'oci8' tnsnames = '(DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = 127.0.0.1)(PORT = 1521)) (CONNECT_DATA = (SID = XE)))' conn = OCI8.new('SYS', 'sys_pwd', tnsnames) cursor = conn.exec('SELECT sysdate FROM dual') while r = cursor.fetch() puts r.join(',') end cursor.close conn.logoff
The code above should not throw any error.
Good job! You deserve any beverage of your choice.
Note: This quick install is for local installations useful for developpers. If you want to use it on production systems, it's your call not mine.