Useful use of pgrep

To list the PIDs of all running process_name, instead of

ps ax|grep process_name|grep -v grep|awk '{print $1}'

do

pgrep process_name


To kill all running process_name, instead of

for p in `ps ax|grep process_name|grep -v grep|awk '{print $1}'`; do kill $p; done


do

pkill process_name