..: Opatch apply failed with Missing command :fuser

Opatch apply failed with Prerequisite check "CheckSystemCommandAvailable" failed error

/usr/local/312813555> opatch apply

Oracle Interim Patch Installer version 12.2.0.1.21

Oracle Home : /u01/app/oracle/product/19.8.0_64

Central Inventory : /app/oraInventory

from : /u01/app/oracle/product/19.8.0_64/oraInst.loc

OPatch version : 12.2.0.1.21

OUI version : 12.2.0.7.0

Log file location : /u01/app/oracle/product/19.8.0_64/cfgtoollogs/opatch/opatch2021-01-01_07-48-00AM_1.log

Verifying environment and performing prerequisite checks...

Prerequisite check "CheckSystemCommandAvailable" failed.

The details are:

Missing command :fuser

UtilSession failed:

Prerequisite check "CheckSystemCommandAvailable" failed.

Log file location: /u01/app/oracle/product/19.8.0_64/cfgtoollogs/opatch/opatch2021-01-01_07-48-00AM_1.log

OPatch failed with error code 73

Opatch log:

[Feb 1, 2021 7:48:10 AM] [INFO] Execution of 'sh /usr/local/31281355/custom/scripts/init -apply 31281355 ':

[Feb 1, 2021 7:48:10 AM] [INFO] Return Code = 0

[Feb 1, 2021 7:48:10 AM] [INFO] Execution of ' Command and arguments of init script is restricted to be viewed in log file ': Return Code = 0

[Feb 1, 2021 7:48:10 AM] [INFO] Running prerequisite checks...

[Feb 1, 2021 7:48:13 AM] [INFO] Space Needed : 5612.323MB

[Feb 1, 2021 7:48:13 AM] [INFO] Missing command :fuser

[Feb 1, 2021 7:48:13 AM] [INFO] Prerequisite check "CheckSystemCommandAvailable" failed.

The details are:

Missing command :fuser

[Feb 1, 2021 7:48:13 AM] [SEVERE] OUI-67073:UtilSession failed:

Prerequisite check "CheckSystemCommandAvailable" failed.

[Feb 1, 2021 7:48:13 AM] [INFO] Finishing UtilSession at Mon Mar 01 07:48:13 GMT 2021

[Feb 1, 2021 7:48:13 AM] [INFO] Log file location: /u01/app/oracle/product/19.8.0_64/cfgtoollogs/opatch/opatch2021-01-01_07-48-00AM_1.log

[Feb 1, 2021 7:48:13 AM] [INFO] Stack Description: java.lang.RuntimeException:

Prerequisite check "CheckSystemCommandAvailable" failed.

Solution:

/home/oracle> cd $ORACLE_HOME/bin

[oracle@dbrestore-test] -->poc19c1<--

/u01/app/oracle/product/19.8.0_64/bin> touch fuser

[oracle@dbrestore-test] -->poc19c1<--

/u01/app/oracle/product/19.8.0_64/bin> chmod 755 fuser

[oracle@dbrestore-test] -->poc19c1<--

/u01/app/oracle/product/19.8.0_64/bin> ls -ltr fuser

-rwxr-xr-x. 1 oracle oinstall 0 Mar 1 07:50 fuser

..