Shell script for startup & shutdown of database

Shutting Down and starting up of Oracle Database using shell scripts:-

1.       vi dbstop.sh

export ORACLE_HOME=/u01/oracle/product/11.1.0/db (Path of Oracle Home)
export PATH=$ORACLE_HOME/bin:$PATH
export ORACLE_SID= SID
lsnrctl stop SID
sqlplus "/ as sysdba"<<EOF
shutdown immediate
EOF

2.       vi dbstart.sh

export ORACLE_HOME=/u01/oracle/product/11.1.0/db
export PATH=$ORACLE_HOME/bin:$PATH
lsnrctl start  SID

export ORACLE_SID= SID

sqlplus "/ as sysdba"<<EOF
startup
EOF