sudo dpkg -i libboost-filesystem1.42.0_1.42.0-3ubuntu1_i386.deb 
Selecting previously deselected package libboost-filesystem1.42.0.
(Reading database ... 149597 files and directories currently installed.)
Unpacking libboost-filesystem1.42.0 (from libboost-filesystem1.42.0_1.42.0-3ubuntu1_i386.deb) ...
dpkg: dependency problems prevent configuration of libboost-filesystem1.42.0:
 libboost-filesystem1.42.0 depends on libboost-system1.42.0 (>= 1.42.0-1); however:
  Package libboost-system1.42.0 is not installed.
dpkg: error processing libboost-filesystem1.42.0 (--install):
 dependency problems - leaving unconfigured
Errors were encountered while processing:
 libboost-filesystem1.42.0