Fix typo in authentication.md (#15721)

Change "certificates authorities" to "certificate authorities".
This commit is contained in:
Johannes Liebermann
2019-08-07 23:53:20 +02:00
committed by Kubernetes Prow Robot
parent 0fc8aa746a
commit d3c216fedc
@@ -71,7 +71,7 @@ can be accomplished using an [authenticating proxy](#authenticating-proxy) or th
### X509 Client Certs
Client certificate authentication is enabled by passing the `--client-ca-file=SOMEFILE`
option to API server. The referenced file must contain one or more certificates authorities
option to API server. The referenced file must contain one or more certificate authorities
to use to validate client certificates presented to the API server. If a client certificate
is presented and verified, the common name of the subject is used as the user name for the
request. As of Kubernetes 1.4, client certificates can also indicate a user's group memberships