To create a wallet 
mkstore -wrl /tmp/wallet –create 
Enter password: mysecret 
PKI-01002: Invalid password. 
Enter password: mysecret1  (not echoed) 
Enter password again: mysecret1 (not echoed)
To add entries to the wallet
mkstore -wrl  -createCredential   The db_connect_string must be identical to the connection string that you specify 
in the URL used in the datasource definition (the part of the string that follows the 
@). It can be either the short form or the long form of the URL.  
For example: myhost:1521/myservice or (DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=myhost-scan)
(PORT=1521)))(CONNECT_DATA=(SERVICE_NAME=myservice)))  To list the wallet entries  $ mkstore -wrl /u01/app/oracle/wallet -listCredential Oracle Secret Store Tool : Version 12.1.0.2 Copyright (c) 2004, 2014, Oracle and/or its affiliates. All rights reserved. Enter wallet password: List credential (index: connect_string username) 2:   1:    $
To use the wallet
Add the following to the sqlnet.ora
WALLET_LOCATION =   (SOURCE = (METHOD = FILE)    (METHOD_DATA = (DIRECTORY = /.../wallet)))   MKSTORE COMMAND    [-create]  [-createSSO]  [-createLSSO]  [-createALO]  [-delete]  [-deleteSSO]  [-list]  [-createEntry alias secret]  [-viewEntry alias]  [-modifyEntry alias secret]  [-deleteEntry alias]  [-createCredential connect_string username password]  [-listCredential]  [-modifyCredential connect_string username password]  [-deleteCredential connect_string] [-help] [-nologo]  
CHANGE WALLET PASSWORD
$ orapki wallet change_pwd -wallet /u01/.../wallets Oracle PKI Tool : Version 12.2.0.1.0 Copyright (c) 2004, 2016, Oracle and/or its affiliates. All rights reserved.  Enter wallet password: Enter New Wallet Password: Confirm Wallet Password: Wallet password has been changed. $