2017-02-23 06:15:00,373 INFO Job starting: snapshot indices
2017-02-23 06:15:00,373 INFO Overriding default connection timeout for snapshot action. New timeout: 21600
2017-02-23 06:15:00,475 INFO Action snapshot will be performed on the following indices: [u'topbeat-2016.12.07', u'topbeat-2016.12.09', u'topbeat-2016.12.10', u'topbeat-2016.12.11', u'topbeat-2016.12.12', u'topbeat-2016.12.15', u'topbeat-2016.12.16', u'topbeat-2016.12.17', u'topbeat-2016.12.18', u'topbeat-2016.12.19', u'topbeat-2016.12.20', u'topbeat-2016.12.21', u'topbeat-2016.12.22', u'topbeat-2016.12.23', u'topbeat-2016.12.24', u'topbeat-2016.12.25', u'topbeat-2016.12.26', u'topbeat-2016.12.27', u'topbeat-2016.12.28', u'topbeat-2016.12.29', u'topbeat-2016.12.30', u'topbeat-2016.12.31', u'topbeat-2017.01.01', u'topbeat-2017.01.02', u'topbeat-2017.01.03', u'topbeat-2017.01.04', u'topbeat-2017.01.05', u'topbeat-2017.01.06', u'topbeat-2017.01.07', u'topbeat-2017.01.08', u'topbeat-2017.01.09', u'topbeat-2017.01.10', u'topbeat-2017.01.11', u'topbeat-2017.01.12', u'topbeat-2017.01.13', u'topbeat-2017.01.14', u'topbeat-2017.01.15', u'topbeat-2017.01.16', u'topbeat-2017.01.17', u'topbeat-2017.01.18', u'topbeat-2017.01.19', u'topbeat-2017.01.20', u'topbeat-2017.01.21', u'topbeat-2017.01.22', u'topbeat-2017.01.23', u'topbeat-2017.01.24']
2017-02-23 06:15:00,642 ERROR No indices provided.
2017-02-23 06:15:00,642 WARNING Job did not complete successfully.
[root@elk-i-1b426dc3 backups]# curator --host elasticsearch.******.com snapshot --repository backups indices --prefix topbeat- --older-than 30 --time-unit days --timestring '%Y.%m.%d'
correct this command please