*copy passwd file from primary
scp $ORACLE_HOME/dbs/passwd$ORACLE_SID{instance_number}
cp [pwd file from primary] orapw$ORACLE_SID

*create static listener

SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
     (GLOBAL_DBNAME = u41testdb.rt.ru)
     (ORACLE_HOME = /oracle/app/base/db/12.1.0.2)
     (SID_NAME = s41testdb)
    )
   )

create audit directory:

mkdir -p /oracle/app/base/admin/s41testdb

create asm directory:

ASMCMD [+] > mkdir +DATA/u41testdb

*startup dummy instance:

echo db_name='db_name' > pfile.ora
startup nomount pfile='pfile.ora'

*connect auxiliary instance +connect target instance

rman target sys/xxxxx@u41testdb auxiliary sys/xxxxx@s41testdb
RMAN> duplicate target database for standby from active database spfile set "db_unique_name"="s41testdb" set "cluster_database"="false" set "audit_file_dest"="/oracle/app/base/admin/s41testdb";

DGMGRL> create configuration u41dg as primary database is u41testdb connect identifier is u41testdb	;
Configuration "u41dg" created with primary database "u41testdb"
DGMGRL> add database s41testdb as connect identifier is s41testdb maintained as physical;
Database "s41testdb" added
DGMGRL> enable configuration;
Enabled.
DGMGRL>