Go to $CATALINA_HOME and edit setenv.sh file by adding the parameters with the value.
If you want to mass multiple parameters, separate them using space
E.g.
cd /opt/tomcat/bin/
sudo nano setenv.sh
edit the line
CATALINA_OPTS="${CATALINA_OPTS}"
to
CATALINA_OPTS="${CATALINA_OPTS} -Dparam=value -Dparam2=value2"
restart tomcat:
service tomcat restart
you should now be able to see the arguments passed to tomcat when you run:
ps aux | grep tomcat