You are looking at documentation for an older release.
Not what you want? See the
current release documentation.
You can also use the license
API to retrieve the currently installed license:
curl -XGET -u elastic:changeme 'http://<host>:<port>/_xpack/license' { "license" : { "status" : "active", "uid" : "0a98411f-73f4-4c67-954c-724874ed5488", "type" : "trial", "issue_date" : "2015-10-13T18:18:20.709Z", "issue_date_in_millis" : 1444760300709, "expiry_date" : "2015-11-12T18:18:20.709Z", "expiry_date_in_millis" : 1447352300709, "max_nodes" : 1000, "issued_to" : "elasticsearch", "issuer" : "elasticsearch" } }

You need cluster admin privileges to retrieve the license.