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Change Sys user password in Oracle

To change sys user password in Oracle in Oracle follow these steps:

1.  Run Rman.exe from the oracle_homebin directory.

2.  On prompt type
Connect Target [and press enter]
SQL "Alter user sys identified by newpsw"; [press enter]
3.  Password has been changed. Exit the rman by exit or quit command.

Using Sys Account in SQL*Plus

sqlplus /nolog
connect / as sysdba
ALTER USER sys IDENTIFIED BY "new_password";