change primary group for a db software installation?

Hi!

RHEL7

RDBMS 12.1 and 19.3

I accidently used "oinstall" instead of "dba" (had done installtions on Solaris so used the same on Linux) as the primary group when I installed and upgraded a db from 12.1 to 19c.

The upgrade when through with some tough love from my side. But now we cant connect using "sqlplus / as sysdba" but it works fine when using the listener, ie sqplus sys/pwd@mydb as sysdba and Im pretty sure the problem is this:

cd $ORACLE_HOME/rdbms/lib

cat config.c | grep "define SS_"

#define SS_DBA_GRP "oinstall"

#define SS_OPER_GRP ""

#define SS_ASM_GRP ""