Main set: sh run_tests.sh jmeter
Alternate set: sh run_tests.sh -2 jmeter
~/myinstall/apache-jmeter-5.3/bin/jmeter.sh $JMGUIMODE -t jmeter/TheoWareInfinity.jmx &
Setting JMGUIMODE="-n"
if you wish to run headerless (without the UI), in which case the test will run wholly in the terminal. Otherwise do not bother setting the variable and the JMeter GUI will start up and you can view and control the test as you would when developing.