$ sqlplus [Enter] User ID : xxxxxx password : xxxxxxxx
sqlplus user_id [Enter] password : xxxxxxxx
sqlplus user_id/password [Enter]
oracle@oracle:~$ sqlplus / as sysdba -- OS 인증만으로 sys 권한획득 oracle@oracle:~$ sqlplus sys/***** as sysdba -- OS인증이 아닌 ID/Passwd 로 인증을 통한 sys 권한획득 oracle@oracle:~$ sqlplus 'sys/***** as sysdba'
oracle@oracle:~$ sqlplus system/*****