I have following basic questions. So please reply me or send me links which can solve these questions. I am using Oracle 9i on Redhat linux (RHEL 4) platform.
1. Why we create two OS groups (oinstall and dba namely) before installing oracle?
2. Purpose of setting environmental variables? At which point each is used. Like we export ORACLE_SID before connection, startup, export etc.
Especially I want to know about ORACLE_BASE, ORACLE_HOME, LD_ASSUME_KERNEL, LD_LIBRARY_PATH, NLS_LANG, NLS_33_LANG and NLS_DATE_FORMAT.
Send link to find more info about environmental variables.