Oracle Linux# sqlplus sys as sysdba
SELECT STATUS FROM V$INSTANCE;
SQL> startup;
ORACLE instance started.
Total System Global Area 2.0133E+10 bytes
Fixed Size 9145824 bytes
Variable Size 7784628224 bytes
Database Buffers 1.2281E+10 bytes
Redo Buffers 57962496 bytes
Database mounted.
Database opened.
SQL> SELECT STATUS FROM V$INSTANCE;
STATUS
------------
OPEN
SQL> ALTER PLUGGABLE DATABASE <<SEU BANCO>> OPEN;
Pluggable database altered.
SQL> exit
Disconnected from Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production
Version 19.3.0.0.0
Oracle Linux# lsnrctl start
==> ATUALIZANDO :
PARA LISTAR OS pluggabledatabases
SQL> select PDB_NAME from DBA_PDBS order by pdb_id
UMA DICA APÓS TER LEVANTANDO O BANCO TUDO RODANDO SALVE O ESTADO DO PLUBBABLEDATABASES
(ISSO VAI PERMITIR QUE AO SER REINICIADO O BANCO VOLTE SEM INTERVENÇÃO)
alter pluggable database ALL save state;
-- Verificando o estado salvo dos pluggabledatabases
SQL> select con_name, instance_name, state, restricted from dba_pdb_saved_states;
-- Verificando o estado corrente dos pluggabledatabases
SQL> show pdbs
https://www.oracle.com/br/technical-resources/articles/database-performance/dos-pluggabled-databases.html