- chroot /root sudo -u "$USERNAME" gconftool-2 -s -t bool /apps/gnome-power-manager/can_hibernate false
- chroot /root sudo -u "$USERNAME" gconftool-2 -s -t bool /apps/gnome-power-manager/can_suspend false
+ chroot /root sudo -u "${USERNAME}" gconftool-2 -s -t bool /apps/gnome-power-manager/can_hibernate false
+ chroot /root sudo -u "${USERNAME}" gconftool-2 -s -t bool /apps/gnome-power-manager/can_suspend false