su - oracle
export ORACLE_SID=cdb1
export ORACLE_HOME=/oracle/app/12.1.0/db1
export PATH=$ORACLE_HOME/bin:$PATH
sqlplus / as sysdba
shutdown immediate ou shutdown abort;
exit;
export ORACLE_SID=oradb1
export ORACLE_HOME=/oracle/app/11.2.0.4/db1
export PATH=$ORACLE_HOME/bin:$PATH
sqlplus / as sysdba
startup;