[oracle@srv-db-05 ~]$ orapki wallet remove -wallet /u/app/oracle/product/12.1.0.2/dbhome_2/owm/wallets/contur -trusted_cert_all -pwd contur123
Oracle PKI Tool : Version 12.1.0.2
Copyright (c) 2004, 2014, Oracle and/or its affiliates. All rights reserved.

[oracle@srv-db-05 ~]$ orapki wallet display -wallet /u/app/oracle/product/12.1.0.2/dbhome_2/owm/wallets/contur
Oracle PKI Tool : Version 12.1.0.2
Copyright (c) 2004, 2014, Oracle and/or its affiliates. All rights reserved.

Requested Certificates:
User Certificates:
Trusted Certificates:
[oracle@srv-db-05 ~]$ orapki wallet add -wallet /u/app/oracle/product/12.1.0.2/dbhome_2/owm/wallets/contur -trusted_cert -cert "/u/app/oracle/product/12.1.0.2/dbhome_2/owm/wallets/contur/digi.p7b" -pwd contur123
Oracle PKI Tool : Version 12.1.0.2
Copyright (c) 2004, 2014, Oracle and/or its affiliates. All rights reserved.

[oracle@srv-db-05 ~]$ orapki wallet display -wallet /u/app/oracle/product/12.1.0.2/dbhome_2/owm/wallets/contur                             Oracle PKI Tool : Version 12.1.0.2
Copyright (c) 2004, 2014, Oracle and/or its affiliates. All rights reserved.

Requested Certificates:
User Certificates:
Trusted Certificates:
Subject:        CN=DigiCert Global Root CA,OU=www.digicert.com,O=DigiCert Inc,C=US