I am working on 19C single database without CDB and PDB. setting wallet_root doesn't work
Below are my steps for this:
SQL>alter system set wallet_root='/opt/Oracle/app/oracle/product/19.0.0/network/admin/wallet' scope=spfile;
SQL>shutdown immediate;
SQL>startup
SQL> alter system set tde_configuration="KEYSTORE_CONFIGURATION=FILE" scope=both;
SQL>administer key management create keystore identified by abc;
SQL>administer key management set keystore open identified by abc;
SQL>ADMINISTER KEY MANAGEMENT CREATE AUTO_LOGIN KEYSTORE from keystore '/opt/Oracle/app/oracle/product/19.0.0/network/admin/wallet/tde' identified by abc;
SQL> ADMINISTER KEY MANAGEMENT SET KEY identified by abc with backup;
ADMINISTER KEY MANAGEMENT SET KEY identified by abc with backup