title: Oracle Database 12C Cannot Start After Shutdown
body: <p>I was able to login to sqlplus with my credentials to do the <code>SHUTDOWN</code> command. It worked and the database shutdown. But now when I try to login again with the same credentials to start the server back up, it says: "ORA-01033:  ORACLE initialization or shutdown in progress". How can I log in to sqlplus and use the <code>STARTUP</code> command?</p>
  
  <p>This is on Linux Debian - Oracle 12C.</p>
  
  <p>EDIT: I shutdown the database to import a copy of old oradata contents.</p>