To become sysdba in sqlplus I can simply enter the command:
# sqlplus '/as sysdba'
(as the system user oracle... with ORACLE_HOME and ORACLE_SID set..)

So far so good...But now I want to import my dump with imp...
Can I connect as sysdba without knowing the password like the syntax
with sqlplus..

# imp '/as sysdba'
(as the system user oracle... with ORACLE_HOME and ORACLE_SID set..)

does not work..