Linux Command Line Kill a Process by Process Name

kill $(pgrep PROCESS_NAME)

killall -v PROCESS_NAME

pkill PROCESS_NAME

kill `ps -ef | grep PROCESS_NAME | grep -v grep | awk '{print $2}'`

source: http://www.howtogeek.com/howto/ubuntu/kill-a-process-by-process-name-from-ubuntu-command-line/