WARNING: Version 5.6 of Elasticsearch has passed its EOL date.
This documentation is no longer being maintained and may be removed. If you are running this version, we strongly advise you to upgrade. For the latest information, see the current release documentation.
templates command provides information about existing templates.
which looks like
name template order version template0 te* 0 template1 tea* 1 template2 teak* 2 7
The output shows that there are three existing templates, with template2 having a version value.
The endpoint also supports giving a template name or pattern in the url
to filter the results, for example