How to set oracle path in Linux

How to set oracle path in Linux 

[oracle@test04 ~]$vi MQTEST.env 

export ORACLE_HOME=/u01/app/oracle/product/12.1.0/dbhome_1

export PATH=$ORACLE_HOME/bin:$PATH:.

export ORACLE_SID=MQTEST

ALERT=/u01/app/oracle/diag/rdbms/mqprod/MQTEST/trace

:wq!