ORA-01033: ORACLE initialization or shutdown in progress

ORA-01033: ORACLE initialization or shutdown in progress

Perform series of commands below:

Login to sqlplus via command prompt

1. shutdown abort

2. startup nomount;

3.alter database mount;

4. alter database open;

If you are using 12C & having pluggable database then run below command additionally.

5. alter pluggable database all open.