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https://docs.oracle.com/cd/B14117_01/server.101/b12170/qstart.htm
https://docs.oracle.com/database/121/ADMQS/GUID-DE8A79BD-FAE4-4364-98FF-D2BD992A06E7.htm
https://dba.stackexchange.com/questions/13075/how-to-use-sqlplus-to-connect-to-an-oracle-database-located-on-another-host-with
https://www.youtube.com/watch?v=b-9cZccCjus
https://www.youtube.com/watch?v=OBa-Ennphgc
https://www.youtube.com/watch?v=UHycvE089A8
https://www.youtube.com/watch?v=6Tb8r_MzIl0
https://www.youtube.com/watch?v=aDCf1twxAcE
https://stackoverflow.com/questions/35174434/what-username-password-should-be-entered-to-use-sql-plus
https://www.quora.com/How-do-I-login-in-into-sqlplus-on-oracle-12c
https://searchoracle.techtarget.com/feature/How-to-use-SQL-Plus-in-Oracle
https://gerardnico.com/lang/sqlplus/connect_instance
https://it.toolbox.com/question/how-to-logon-sqlplus-as-sysdba-081606