[edit]
$ curl cheat.sh/ 
# percol
# adds flavor of interactive filtering to the traditional pipe concept
# of UNIX shell

# to install percol
sudo pip install percol

# interactive pgrep version
ps aux | percol | awk '{ print $2 }'

# interactive pkill version
ps aux | percol | awk '{ print $2 }' | xargs kill

$
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