JMeter Set Thread Count , Rampup time from Command line arguments

Get the syntax from Tools ---> Function Helper Dialog

 Select __P
 Copy the Function syntax

Add result file location as we are running from Non-GUI to pass command line parameters

for threadNumber  prefix with J     , JthreadNumber

jmeter -n -t test1.jmx -JthreadNumber=5 -JrampUP=10
now the thread runs for  5 times overriding  default value 1