Code:
[ -z $(ps -A | grep ksysguard) ] && ksysguard & disown &&
wmctrl -iR $(wmctrl -l | grep "System Monitor" | sed 's/\ .*//')
Depend on wmctrl.
Are you tired of winding up with multiple instances of a program of which you don't really need multiple instances? Your problems are over! Now you can just press the hot-keys or whatever shortcuts you have, without ever worrying about earlier instances. No more sore joints for having to close...