Solution : https://service.sap.com/sap/support/notes/372205 (SAP Service marketplace login required)
Key words : 
directory <cd mountpoint>/unix/<unix_derivat>_<bit_version>/install, <cd mountpoint>/unix/common/installcopy, dba --> $oracle_home/dbs/init<sid>, ora --> $oracle_home/dbs/init<sid>, sap --> $oracle_home/dbs/init<sid>, ora --> $oracle_home/dbs/init_80x, ora --> $oracle_home/dbs/init_81x, add --> $oracle_home/dbs/initora, directory $oracle_home/dbsinitora, terms init<sid>
Related Notes : 
       
| 653247 | Composite note: ORA-01078 | 
| 419920 | INST: 4.6D SR1 SAP Basis Inst. on UNIX - Oracle | 
| 387077 | INST: R/3 4.6C SR2 Inst. on UNIX - Oracle | 
| 313110 | INST: 4.6C SR1 R/3 Inst. on UNIX - Oracle | 
| 311308 | INST: 4.6D SAP Basis Inst. on UNIX - Oracle | 
| 201147 | INST: 4.6C R/3 Inst. on UNIX - Oracle | 
| 179139 | INST: 4.6B R/3 Inst. on UNIX - Oracle |