Set Up Opatch 12.2.0.1.27 for DB 19.0.0.0.0, on Linux x86-64, Same steps to upgrade the last version.
Step 1: Download the Opatch zip file 12.2.0.1.27 for DB 19.0.0.0.0
Step 2: Backup Old Opatch Version
$ /u01/app/oracle/product/19.1.0/dbhome_1/OPatch/opatch version
OPatch Version: 12.2.0.1.17
OPatch succeeded.
$ mv OPatch/ OPatch_BKP
Step 3: Unzip The Downloaded Optach file:
$ unzip /home/oracle/p6880880_190000_Linux-x86-64.zip -d $ORACLE_HOME
Step 4: Test the version
$ /u01/app/oracle/product/19.1.0/dbhome_1/OPatch//opatch version
OPatch Version: 12.2.0.1.27
Enjoy!