# Managing the database parameters

The configuration parameters are stored in the database, except for the parameters related to the Talend Administration Center database that are stored in the following file:

<ApplicationPath>/WEB-INF/classes/configuration.properties

The database-related passwords are encrypted at start up, when this file is parsed and loaded in the database.

### In this section

* [Change the encrypted default account password](https://help.qlik.com/talend/en-US/installation-guide-linux/8.0/change-encrypted-default-account-password)
* [Change the default password used to configure the database](https://help.qlik.com/talend/en-US/installation-guide-linux/8.0/change-default-pwd-config-db)
* [Clearing lock of taskexecutionhistory table](https://help.qlik.com/talend/en-US/installation-guide-linux/8.0/clearing-lock-of-taskexecutionhistory-table)