-Edit the cluster config at @/etc/arvados/config.yml@ and set @Services.Keepproxy.ExternalURL@ and @Services.Keepproxy.InternalURLs@. Replace @zzzzz@ with your cluster id.
+Edit the cluster config at @/etc/arvados/config.yml@ and set @Services.Keepproxy.ExternalURL@ and @Services.Keepproxy.InternalURLs@. Replace @uuid_prefix@ with your cluster id.