Check the central inventory in Oracle Database at Windows or Unix platform

Windows

1. By default Central Inventory location in windows is at “C:\Program Files\Oracle\Inventory”.

2. If you don’t find then you will check the “inst_loc” key in Window registry:
Go to Regedit in research --> Open Registry editor --> HKEY_LOCAL_MACHINE/SOFTWARE/ORACLE --> Find "inst_loc".

3. Find in 64-bit command prompt as follows:
reg query HKLM\SOFTWARE\ORACLE /v inst_loc

4. Find in 32-bit with command prompt:
reg query HKLM\SOFTWARE\WOW6432Node\ORACLE /v inst_loc

Unix or Linux

1. Default Central inventory location present in the file /etc/oraInst.loc (AIX and Linux) or /var/opt/oracle/oraInst.loc (other platform)

2. If you don’t find then you can create the file with oraInst.loc please take care of capital or small letters Linux is case sensitivity.

Example:
inventory_loc=/u01/oracle/oraInventory
inst_group=oinstall