Unlock an Oracle user on the command line

DBAs often encounter unlocking Oracle users in their daily work. This article describes how to unlock Oracle users using the command line, you can use several simple unlock statements to complete this task. The specific process is as follows:

Scott users are locked by default, and they can be unlocked first to log on to the land. Use the following statement to unlock scott:

Alter user scott account unlock;

This password may be required after unlocking:

Alter user scott identified by tiger;

Log On again:

Sqlplus scott/tiger

You can log on.

Oracle commands for locking and unlocking users

SQL> conn/as sysdba
Connected.
// Scott cannot log on when the default tieger password is not set.

How to lock a user:

SQL> alter user test account lock;

The user has changed.

------- The test user fails to log on to the database.
C: \> sqlplus test/test

ERROR:
ORA-28000: the account is locked

How to unlock an Oracle user:

SQL> conn/as sysdba
SQL> alter user test account unlock;

The user has changed. This completes the Oracle user unlocking operation.