How to recreate oraInventory

[oracle@furqan OPatch]$ ./opatch lsinventory

Invoking OPatch 11.2.0.1.0 Oracle interim Patch Installer version 11.2.0.1.0Copyright (c) 2011, Oracle Corporation. All rights reserved.. Oracle Home : /oracle/product/10.2.0/db_1 Central Inventory : /home/oracle/oraInventory from : /oracle/product/10.2.0/db_1/oraInst.loc OPatch version : 11.2.0.1.0OUI version : 11.2.0.1.0 OUI location : /oracle/product/10.2.0/db_1/oui Log file location : /oracle/product/10.2.0/db_1/cfgtoollogs/opatch/opatch-2016_Jul_06_15-08-10-IST_Wed.log LsInventory Session failed: OPatch failed to locate Central Inventory. Possible causes are: The Central Inventory is corrupted The oraInst.loc file specified is not valid. OPatch failed with error code 72

We recreated the Central Inventory using

$ cd $ORACLE_HOME/oui/bin/runInstaller

[oracle@furqan bin]$ ./runInstaller -silent -attachHome -invPtrLoc /etc/orainst.loc ORACLE_HOME=$ORACLE_HOME ORACLE_HOME_NAME=OraDBHome_1

Starting Oracle Universal Installer... No pre-requisite checks found in oraparam.ini, no system pre-requisite checks will be executed. Please execute the '/home/oracle/oraInventory/orainstRoot.sh' script at the end of the session. 'Attach Home' was successful.

When we will search again the opatch lsinventory, we got it

[oracle@furqan OPatch]$ ./opatch lsinventory

 Invoking OPatch 11.2.0.1.0 Oracle interim Patch Installer version 11.2.0.1.0 Copyright (c) 2011, Oracle Corporation. All rights reserved.. Oracle Home : /oracle/product/10.2.0/db_1 Central Inventory : /home/oracle/oraInventory from : /oracle/product/10.2.0/db_1/oraInst.loc OPatch version : 11.2.0.1.0 OUI version : 11.2.0.1.0 OUI location : /oracle/product/10.2.0/db_1/oui Log file location : /oracle/product/10.2.0/db_1/cfgtoollogs/opatch/opatch-2016_J ul_08_13-46-03-IST_Wed.log Lsinventory Output file location : /oracle/product/10.2.0/db_1/cfgtoollogs/opatc h/lsinv/lsinventory-2016_Jul_06_15-46-03-IST_Wed.txt

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Installed Top-level Products (1): Oracle Database 10g 11.2.0.1.0 There are 1 products installed in this Oracle Home. There are no Interim patches installed in this Oracle Home.

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OPatch succeeded.