core@BigCoreBox:~$ ps aux | egrep "(metacity|compiz)"
core      1986  0.3  0.3 399436 15940 ?        Sl   04:27   0:08 metacity
core      4889  0.0  0.0   9144  1056 pts/0    S+   05:05   0:00 egrep --color=auto (metacity|compiz)