lsof -nPi tcp:80

nocache <I/O-heavy-command>

lsmod | perl -e 'print "digraph \"lsmod\" {";<>;while(<>){@=split/\s+/; print "\"$[0]\" -> \"$\"\n" for split/,/,$[3]}print "}"' | dot -Tpng | display -

strace -e write=1,2 -p $PID 2>&1 | sed -un "/^ |/p" | sed -ue "s/^.{9}(.{50}).+/\1/g" -e 's/ //g' | xxd -r -p

ctrl-x e

Next time you are using your shell, try typing ctrl-x e (that is holding control key press x and then e). The shell will take what you've written on the command line thus far and paste it into the editor specified by $EDITOR. Then you can edit at leisure using all the powerful macros and commands of vi, emacs, nano, or whatever.

disown -a && exit

arecord -f cd | ssh -C user@host aplay -f cd

or the other way around

ssh -C user@host arecord -f cd | aplay -f cd

echo mem | sudo tee /sys/power/state
which cuts down on unnecessary packages.
Incidentally, this also works on android phones.