[kittykatt@arch-laptop][~]$ { echo "beryl fluxbox openbox blackbox xfwm4 metacity kwin fvwm enlightenment icewm wmaker pekwm" | tr ' ' '\n'; echo `ps -A | awk {'print $4'}` | tr ' ' '\n'; } | sort | uniq -d
agetty
bash
chromium
dbus-daemon
devkit-disks-da
ext4-dio-unwrit
hald-addon-stor
pekwm
syslog-ng
udevd
[kittykatt@arch-laptop][~]$