关于数据库参数文件某些参数的定义，做备忘用！

DISPLAY

The name, server number, and screen number of the system where the Oracle Universal Installer display its Graphical User Interface (GUI).

ORA_NLS33

Location of character set data. No

ORACLE_BASE

Directory at the top of the Oracle software and administrative file structure.

ORACLE_HOME

Directory containing Oracle software for a particular release.

ORACLE_SID

The Oracle server instance identifier to use during installation.

PATH

Shell’s search path for executables.

ORACLE_TERM

specifies the terminal definition resource file to be used with the Installer. If ORACLE_TERM is not set, the Installer uses the value of the UNIX environment variable TERM and searches for an equivalent ORACLE_TERM resource

LD_LIBRARY_PATH

a colon-separated set of directories where libraries should be searched for first

NLS_LANG

the client character set,you can refence this doc for details

TNS_ADMIN

TNS_ADMIN in unix to point to the location listener.ora tnsnames.ora