SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (GLOBAL_DBNAME = orclcdb)
      (SID_NAME = orclcdb)
      (ORACLE_HOME = /u01/app/oracle/product/version/db_1)
    )
  )

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
      (ADDRESS = (PROTOCOL = TCP)(HOST = 0.0.0.0)(PORT = 1521))
    )
  )

#HOSTNAME by pluggable not working rstriction or configuration error.
DEFAULT_SERVICE_LISTENER = (orclcdb)

ORCLCDB=localhost:1521/orclcdb ORCL=  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = 0.0.0.0)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = orcl)
    )   )