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$ORACLE_HOME/bin/oracle permission issue

Facing issue with file permission


We have 4 ORACLE_HOME installed in 6 node RAC cluster. The oracle home versions are 12.1, 12.2, 18 and 19C. The permission for $ORACLE_HOME/bin/oracle are different as below.

$ ls -lrt /u01/app/oracle/product/*/db/bin/oracle

-rwsr-s--x 1 oracle dba 446530280 Jul 9 13:20 /u01/app/oracle/product/19.0.0/db/bin/oracle

-rwsr-s--x 1 oracle dba 438982920 Jul 9 13:21 /u01/app/oracle/product/18.0.0/db/bin/oracle

-rwsr-s--x 1 oracle oinstall 409498784 Jul 9 13:23 /u01/app/oracle/product/12.2.0/db/bin/oracle

-rwsr-s--x 1 oracle oinstall 323617088 Jul 19 09:15 /u01/app/oracle/product/12.1.0/db/bin/oracle

According to our server configuration all should be oracle:dba but for 12.1 and 12.2 are changed to oracle:oinstall. Please suggest what changes need to do, so that the permission should be uniform and reflect oracle:dba for $ORACLE_HOME/bin/oracle.

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