Kill all processes match the process name or script name:
ps aux | grep [search string] | awk '{print $2}' | xargs kill -9
or use pkill
:
pkill -9 -f [search string]
From Linux: How to Kill all instances of a script/program by using a string search
-f, –full The pattern is normally only matched against the process name. When -f is set, the full command line is used.