You can restore a component from the file you created when backing
  up that component. You do this with the restore command.
Note that the restore command:
- Uses the specified backup file or gets the latest backup file, if a filename was not specified.
 - Ensures that the component's data directories are empty.
 - Stops the component. You must explicitly restart the component after a restore.
 
This section describes how to use the restore command.
To restore a component from a backup file:
- Ensure that the following directories are empty:
      
/opt/apigee/data/component_name /opt/apigee/etc/component_name.d
If they are not empty, delete their contents using commands like the following:
rm -r /opt/apigee/data/component_name
rm -r /opt/apigee/etc/component_name.d - Restore the previous configuration and data by using the following command:
      
/opt/apigee/apigee-service/bin/apigee-service component_name restore backup_file
Where:
- component_name is the name of the component. Possible values include:
          
apigee-cassandra(Cassandra)apigee-openldap(OpenLDAP)apigee-postgresql(PostgreSQL database)apigee-qpidd(Qpidd)apigee-sso(Edge SSO)apigee-zookeeper(ZooKeeper)edge-management-server(Management Server)edge-management-ui(new Edge UI)edge-message-processor(Message Processor)edge-postgres-server(Postgres Server)edge-qpid-server(Qpid Server)edge-router(Edge Router)edge-ui(Classic UI)
 - backup_file is the name of the file you created when you
          backed up that component; this value does not include
          the path, but does include the "backup-" prefix and file extensions. For example,
          
backup-2019.03.17,14.40.41.tar.gz. 
 - component_name is the name of the component. Possible values include:
          
 - Restart the component, as the following example
      shows:
      
/opt/apigee/apigee-service/bin/apigee-service component_name start
 
For example:
/opt/apigee/apigee-service/bin/apigee-service apigee-cassandra restore backup-2019.03.17,14.40.41.tar.gz
Specifying backup_file is optional. If omitted, Apigee uses the most recent file
      in /opt/apigee/backup/component_name.
The restore command re-applies the backed up configuration and restores the
      data from when the backup took place.