Database issues:

---

1.ORA-28007: the password cannot be reused 

2.ORA-01276: Cannot add file /u01/datafile/o1_mf_apps_ts__g601kz6x_.dbf. File has an Oracle Managed Files file name

3.ORA-32771: cannot add file to bigfile tablespace

4.TNS: Lost Contact ORA-12547 

5.ORA-19815: WARNING: db_recovery_file_dest_size

6.Query failing with error ORA-01157: and ORA-01110: After clone

7.ORA-24247: network access denied by access control list (ACL)

8.SYS password change in Oracle 12cR2 and 18c:

9.ORA-19815: WARNING: db_recovery_file_dest_size

10.STARTUP Database failed ORA-38760 to turn on Flashback Database:

11.ORA-00600: internal error code, arguments: [kjxmgmb_nreq:!bat] while starting RAC instance after host reboot:

12.TNS-01201: Listener cannot find executable :