Using Oracle Directories names as same of path
Just because you are able to do something, it does not necessarily mean it is a good idea.

[oracle@o73 ~]$ sqlplus / as sysdba

SQL*Plus: Release 18.0.0.0.0 Production on Thu Apr 5 16:20:15 2018
Version 18.1.0.0.0

Copyright (c) 1982, 2017, Oracle.  All rights reserved.


Connected to:
Oracle Database 18c Enterprise Edition Release 18.0.0.0.0 - Production
Version 18.1.0.0.0

SQL&gt; create directory "/home/oracle" as '/home/oracle';

Directory created.

SQL&gt; Disconnected from Oracle Database 18c Enterprise Edition Release 18.0.0.0.0 - Production
Version 18.1.0.0.0
[oracle@o73 ~]$ expdp \'/ as sysdba\' directory=\\\"/home/oracle\\\" schemas=bp

Export: Release 18.0.0.0.0 - Production on Thu Apr 5 16:20:33 2018
Version 18.1.0.0.0

Copyright (c) 1982, 2018, Oracle and/or its affiliates.  All rights reserved.

Connected to: Oracle Database 18c Enterprise Edition Release 18.0.0.0.0 - Production
Starting "SYS"."SYS_EXPORT_SCHEMA_04":  "/******** AS SYSDBA" directory=\"/home/oracle\" schemas=bp
Processing object type SCHEMA_EXPORT/USER
Processing object type SCHEMA_EXPORT/SYSTEM_GRANT
Processing object type SCHEMA_EXPORT/ROLE_GRANT
Processing object type SCHEMA_EXPORT/DEFAULT_ROLE
Processing object type SCHEMA_EXPORT/PRE_SCHEMA/PROCACT_SCHEMA
Master table "SYS"."SYS_EXPORT_SCHEMA_04" successfully loaded/unloaded
******************************************************************************
Dump file set for SYS.SYS_EXPORT_SCHEMA_04 is:
  /home/oracle/expdat.dmp
Job "SYS"."SYS_EXPORT_SCHEMA_04" successfully completed at Thu Apr 5 16:20:53 2018 elapsed 0 00:00:18