preconfiguring oracle linux 7 for oracle database 12c

preconfiguring oracle linux 7 for Oracle database 12c.
.bash_profile file Oracle settings:
Oracle Settings
export TMP=/tmp
export TMPDIR=$TMP
export ORACLE_HOSTNAME=oem.oracle.test
export ORACLE_UNQNAME=em
export ORACLE_BASE=/u01/app/oracle
export ORACLE_HOME=$ORACLE_BASE/product/12.1.0.2/db_1
export ORACLE_SID=em
export PATH=/usr/sbin:$PATH
export PATH=$ORACLE_HOME/bin:$PATH
export OMS_HOME=/u01/app/oracle/middleware
export AGENT_HOME=/u01/app/oracle/agent/agent_inst
export LD_LIBRARY_PATH=$ORACLE_HOME/lib:/lib:/usr/lib
export CLASSPATH=$ORACLE_HOME/jlib:$ORACLE_HOME/rdbms/jlib