Process

pkill

To kill a process by its name

pkill python2

pgrep

Get the pid like using grep

pgrep python2

>>> 11123

By process name and its parameters, we use -f, which means 'full'

pgrep -f "python2 test.py*"

Use pgrep with kill

kill -9 $(pgrep -f "python2 test.py*")