How to Attach ORACLE_HOME and Recreate Central Inventory(oraInventory) In RDBMS Homes

[oracle@oracledbprod-ro oracle]$ pwd
/u01/oracle
[oracle@oracledbprod-ro oracle]$ cp -r oraInventory oraInventory_28Feb2018

[oracle@oracledbprod-ro bin]$ cd $ORACLE_HOME/oui/bin
[oracle@oracledbprod-ro bin]$ ls -ltr attachHome.sh
-rwxr-x--- 1 oracle oinstall 298 Apr 10  2012 attachHome.sh
[oracle@oracledbprod-ro bin]$ ./attachHome.sh &
[1] 28599
[oracle@oracledbprod-ro bin]$ ./attachHome.sh: line 5: cd: /u01/oracle/software/product/11.2.3/test/oui/bin: No such file or directory
Starting Oracle Universal Installer...

Checking swap space: must be greater than 500 MB.   Actual 32763 MB    Passed
The inventory pointer is located at /etc/oraInst.loc
The inventory is located at /u01/oracle/oraInventory
'AttachHome' was successful.

[1]+  Done                    ./attachHome.sh



[oracle@oracledbprod-ro bin]$ $ORACLE_HOME/OPatch/opatch lsinventory -all
Invoking OPatch 11.2.0.1.7

Oracle Interim Patch Installer version 11.2.0.1.7
Copyright (c) 2011, Oracle Corporation.  All rights reserved.


Oracle Home       : /u01/oracle/software/product/11.2.3/devro
Central Inventory : /u01/oracle/oraInventory
   from           : /etc/oraInst.loc
OPatch version    : 11.2.0.1.7
OUI version       : 11.2.0.3.0
Log file location : /u01/oracle/software/product/11.2.3/devro/cfgtoollogs/opatch/opatch2018-02-28_06-28-43AM.log

List of Homes on this system:

  Home name= OraDb11g_home1, Location= "/u01/oracle/software/product/11.2.0/test"
  Home name= OraDb11g_home2, Location= "/u01/oracle/software/product/11.2.0/oracle"
  Home name= OraDb11g_home3, Location= "/u01/oracle/software/product/11.2.3/infra"
  Home name= OraDb11g_home4, Location= "/u01/oracle/software/product/11.2.3/oracle"
  Home name= OraDb11g_home6, Location= "/u01/oracle/software/product/112035/oracle"
  Home name= OraDb11g_home7, Location= "/u04/oracle/software/product/11.2.0.4"
  Home name= OraHome1, Location= "/u01/oracle/ogghome/12.2"
  Home name= OraDb11g_home5, Location= "/u01/oracle/software/product/11.2.3/test"
Inventory load failed... OPatch cannot load inventory for the given Oracle Home.
Possible causes are:
   Oracle Home dir. path does not exist in Central Inventory
   Oracle Home is a symbolic link
   Oracle Home inventory is corrupted
LsInventorySession failed: OracleHomeInventory gets null oracleHomeInfo



[oracle@oracledbprod-ro bin]$ more /etc/oraInst.loc
inventory_loc=/u01/oracle/oraInventory
inst_group=oinstall


[oracle@oracledbprod-ro bin]$ echo $ORACLE_HOME
/u01/oracle/software/product/11.2.3/devro
[oracle@oracledbprod-ro bin]$ echo $ORACLE_HOME_NAME

[oracle@oracledbprod-ro bin]$ ./runInstaller -silent -ignoreSysPrereqs -attachHome ORACLE_HOME="/u01/oracle/software/product/11.2.3/devr                                o" ORACLE_HOME_NAME="devro"
Starting Oracle Universal Installer...

Checking swap space: must be greater than 500 MB.   Actual 32763 MB    Passed
The inventory pointer is located at /etc/oraInst.loc
The inventory is located at /u01/oracle/oraInventory
'AttachHome' was successful.
[oracle@oracledbprod-ro bin]$ $ORACLE_HOME/OPatch/opatch lsinventory -detail
Invoking OPatch 11.2.0.1.7

Oracle Interim Patch Installer version 11.2.0.1.7
Copyright (c) 2011, Oracle Corporation.  All rights reserved.


Oracle Home       : /u01/oracle/software/product/11.2.3/devro
Central Inventory : /u01/oracle/oraInventory
   from           : /etc/oraInst.loc
OPatch version    : 11.2.0.1.7
OUI version       : 11.2.0.3.0
Log file location : /u01/oracle/software/product/11.2.3/devro/cfgtoollogs/opatch/opatch2018-02-28_06-35-07AM.log

Lsinventory Output file location : /u01/oracle/software/product/11.2.3/devro/cfgtoollogs/opatch/lsinv/lsinventory2018-02-28_06-35-07AM.t                                xt

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Installed Top-level Products (1):

Oracle Database 11g                                                  11.2.0.3.0
There are 1 products installed in this Oracle Home.


Installed Products (124):

Agent Required Support Files                                         10.2.0.4.3
Assistant Common Files                                               11.2.0.3.0
Bali Share                                                           1.1.18.0.0
Buildtools Common Files                                              11.2.0.3.0
Character Set Migration Utility                                      11.2.0.3.0