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Don Burleson Blog 







Default ORACLE_HOME location tips

Oracle Database Tips by Donald BurlesonMarch 21, 2015

Question:  What is the default ORACLE_HOME location on Windows and UNIX/Linux?  How do I find the default ORACLE_HOME location?

Answer:  In Windows, you can look at your registry entry to see the location of your ORACLE_HOME directory.  At install time, the installer program will prompt you for the location of your $ORACLE_HOME directory so there is no default location for ORACLE_HOME on Windows or UNIX.

In Windows, you can find the default ORACLE_HOME with these steps:

start --> run --> regedit (enter) - HKEY_LOCAL_MACHINE - SOFTWARE - ORACLE

In UNIX and Linux, you can find the default $ORACLE_HOME directory location in the /etc/passwd file.  The following command will display the ORACLE_HOME directory location in UNIX/Linux:

root> cat /etc/passwd|grep -i ora

Also, the /etc/oratab file contains entries in the form of ORACLE_SID:ORACLE_HOME:Y, the second string being the default ORACLE_HOME.  In Solaris, the default ORACLE_HOME is located in the /var/opt/oracle/oratab file.

root> cat /etc/oratab


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