[Oracle Active DataGuard 12.1 Installation on Centos 6.7]: Checking RMAN connection to both Instances

Primary

manager - my password created during database installation

$ rman target sys/manager@primary auxiliary sys/manager@standby

Recovery Manager: Release 12.1.0.2.0 - Production on Thu Aug 13 17:16:07 2015

Copyright (c) 1982, 2014, Oracle and/or its affiliates.  All rights reserved.

connected to target database: ORCL12 (DBID=3487298206)
connected to auxiliary database: ORCL12 (not mounted)

If it didn’t work, you can run commands separately on Primary and Standby:

$ rman target sys/manager@primary

$ rman target sys/manager@standby