The password for the SYS user should be set when you create the Exasol deployment. To change the SYS user password after the database has been deployed you must be logged in either as SYS or as a user with the ALTER USER privilege.

ALTER USER sys IDENTIFIED BY "<new_password>";

In Exasol 2025.2 and later, a random password for SYS is generated if a password is not explicitly set in the configuration. For more information, see Configure the deployment.

For security reasons, always replace the default password of the SYS user with a secure password.