How to change system password for Oracle 9i

I have an Oracle 9i server. I want to change the "system" password for the same and I am not aware of the old password.

Please suggest how I can do the same.

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Do you have any user with DBA privileges? If you have one, then login and change the system password..

alter user system identified by new_password;
anandabrataAuthor Commented:
I do not have any user with dba permission. But I have heard that the "sys" user has dba priviliges. I am not sure incase sys and system are the same user. And even if they are not then is the default password of the sys user change_on_install.

I tried sys/change_on_install as sysdba ..the same is also not being accepted at prompt. Isn't there any other way to resolve this issue.
sys - default password is change_on_install
system - manager

If you can login as sys (or any user with dba privileges) then it's easy to change the password for system user...

Else,if you are using a password file, then you can change it. Following are the links :

Else, ask someone who has the sys login information...

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You know need to have SYS password if your loging from same server where database is installed.

if its windows:
Start->Run-> sqlplusw /nolog
SQL> connect / as sysdba
SQL> aler user system identified by manager;
SQL> connect system/manager

if its unix:
oracle$ sqlplus /nolog
SQL> connect / as sysdba
SQL> aler user system identified by manager;
SQL> connect system/manager

Velu N
Hi use this statement:
>conn sys / as sysdba
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