Working with processes: kill

me@locutus:~$ ps waux | head -n 1 ; ps waux | grep thunderbird USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND jrs 2779 0.2 1.8 2323372 1244852 ? Sl Jan23 65:14 /usr/lib/thunderbird-8.0/thunderbird-bin jrs 25731 0.0 0.0 23020 884 pts/4 S+ 17:03 0:00 grep --color=auto thunderbird me@locutus:~$ kill 2779

me@locutus:~$ ps waux | grep chromium-browser | grep -v grep | awk '{print $2}' | xargs -I% kill -9 %