fcoretools 1.0-1 (i386 binary) in ubuntu jaunty

 fincore is a command that shows which pages (blocks) of a file are in core
 memory. It is particularly useful for determining the contents of the
 buffer-cache.
 .
 fadvise is a command used to give file advisory information to the operating
 system. Its "--dontneed" option is particularly useful in that it causes the
 files' pages (blocks) to be evicted from the buffer-cache.