I 'd be grateful if could give me some instructions on how to install oracle XE in Ubuntu 12.10 32bit.
In addition i d like to know which package i need to install.
Is oracle-xe_10.2.0.1-1.0_i386.deb the right package?
You have the right 10g XE package. The Install Guide for 10g XE is here - http://docs.oracle.com/cd/B25329_01/doc/install.102/b25144/toc.htm
Pl be aware that 10g XE is de-supported and that 11g XE is only available for 64-bit OS versions
I found only the Western European character set available. Can i use for example the character set GreekEL8ISO8859P7 If i install the Western European character set package?
Universal character set: oracle-xe-universal_10.2.0.1-1.0_i386.deb
Western European character set: oracle-xe_10.2.0.1-1.0_i386.deb
No, since the Western European characterset does not support Greek - http://en.wikipedia.org/wiki/ISO/IEC_8859-1
Which Character Set Supports Which Language [ID 62421.1]
You will need to use the Universal characterset (UTF8) version